1728 lines
43 KiB
C
1728 lines
43 KiB
C
/*
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* SuperH Mobile LCDC Framebuffer
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*
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* Copyright (c) 2008 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/mm.h>
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#include <linux/clk.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/interrupt.h>
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#include <linux/vmalloc.h>
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#include <linux/ioctl.h>
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#include <linux/slab.h>
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#include <linux/console.h>
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#include <linux/backlight.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <video/sh_mobile_lcdc.h>
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#include <video/sh_mobile_meram.h>
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#include <linux/atomic.h>
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#include "sh_mobile_lcdcfb.h"
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#define SIDE_B_OFFSET 0x1000
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#define MIRROR_OFFSET 0x2000
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#define MAX_XRES 1920
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#define MAX_YRES 1080
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static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
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[LDDCKPAT1R] = 0x400,
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[LDDCKPAT2R] = 0x404,
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[LDMT1R] = 0x418,
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[LDMT2R] = 0x41c,
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[LDMT3R] = 0x420,
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[LDDFR] = 0x424,
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[LDSM1R] = 0x428,
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[LDSM2R] = 0x42c,
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[LDSA1R] = 0x430,
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[LDSA2R] = 0x434,
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[LDMLSR] = 0x438,
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[LDHCNR] = 0x448,
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[LDHSYNR] = 0x44c,
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[LDVLNR] = 0x450,
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[LDVSYNR] = 0x454,
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[LDPMR] = 0x460,
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[LDHAJR] = 0x4a0,
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};
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static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
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[LDDCKPAT1R] = 0x408,
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[LDDCKPAT2R] = 0x40c,
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[LDMT1R] = 0x600,
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[LDMT2R] = 0x604,
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[LDMT3R] = 0x608,
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[LDDFR] = 0x60c,
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[LDSM1R] = 0x610,
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[LDSM2R] = 0x614,
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[LDSA1R] = 0x618,
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[LDMLSR] = 0x620,
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[LDHCNR] = 0x624,
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[LDHSYNR] = 0x628,
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[LDVLNR] = 0x62c,
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[LDVSYNR] = 0x630,
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[LDPMR] = 0x63c,
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};
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static const struct fb_videomode default_720p = {
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.name = "HDMI 720p",
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.xres = 1280,
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.yres = 720,
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.left_margin = 220,
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.right_margin = 110,
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.hsync_len = 40,
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.upper_margin = 20,
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.lower_margin = 5,
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.vsync_len = 5,
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.pixclock = 13468,
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.refresh = 60,
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.sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
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};
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struct sh_mobile_lcdc_priv {
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void __iomem *base;
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int irq;
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atomic_t hw_usecnt;
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struct device *dev;
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struct clk *dot_clk;
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unsigned long lddckr;
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struct sh_mobile_lcdc_chan ch[2];
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struct notifier_block notifier;
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int started;
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int forced_bpp; /* 2 channel LCDC must share bpp setting */
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struct sh_mobile_meram_info *meram_dev;
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};
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static bool banked(int reg_nr)
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{
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switch (reg_nr) {
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case LDMT1R:
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case LDMT2R:
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case LDMT3R:
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case LDDFR:
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case LDSM1R:
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case LDSA1R:
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case LDSA2R:
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case LDMLSR:
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case LDHCNR:
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case LDHSYNR:
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case LDVLNR:
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case LDVSYNR:
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return true;
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}
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return false;
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}
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static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
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int reg_nr, unsigned long data)
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{
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iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
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if (banked(reg_nr))
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iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
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SIDE_B_OFFSET);
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}
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static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
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int reg_nr, unsigned long data)
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{
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iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
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MIRROR_OFFSET);
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}
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static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
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int reg_nr)
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{
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return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
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}
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static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
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unsigned long reg_offs, unsigned long data)
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{
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iowrite32(data, priv->base + reg_offs);
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}
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static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
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unsigned long reg_offs)
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{
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return ioread32(priv->base + reg_offs);
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}
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static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
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unsigned long reg_offs,
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unsigned long mask, unsigned long until)
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{
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while ((lcdc_read(priv, reg_offs) & mask) != until)
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cpu_relax();
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}
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static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
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{
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return chan->cfg.chan == LCDC_CHAN_SUBLCD;
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}
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static void lcdc_sys_write_index(void *handle, unsigned long data)
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{
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struct sh_mobile_lcdc_chan *ch = handle;
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lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
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lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
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(lcdc_chan_is_sublcd(ch) ? 2 : 0));
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lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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}
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static void lcdc_sys_write_data(void *handle, unsigned long data)
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{
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struct sh_mobile_lcdc_chan *ch = handle;
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lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
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lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
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(lcdc_chan_is_sublcd(ch) ? 2 : 0));
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lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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}
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static unsigned long lcdc_sys_read_data(void *handle)
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{
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struct sh_mobile_lcdc_chan *ch = handle;
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lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
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lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
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(lcdc_chan_is_sublcd(ch) ? 2 : 0));
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udelay(1);
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lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
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}
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struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
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lcdc_sys_write_index,
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lcdc_sys_write_data,
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lcdc_sys_read_data,
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};
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static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
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{
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if (atomic_inc_and_test(&priv->hw_usecnt)) {
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if (priv->dot_clk)
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clk_enable(priv->dot_clk);
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pm_runtime_get_sync(priv->dev);
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if (priv->meram_dev && priv->meram_dev->pdev)
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pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
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}
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}
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static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
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{
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if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
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if (priv->meram_dev && priv->meram_dev->pdev)
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pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
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pm_runtime_put(priv->dev);
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if (priv->dot_clk)
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clk_disable(priv->dot_clk);
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}
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}
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static int sh_mobile_lcdc_sginit(struct fb_info *info,
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struct list_head *pagelist)
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{
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struct sh_mobile_lcdc_chan *ch = info->par;
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unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
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struct page *page;
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int nr_pages = 0;
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sg_init_table(ch->sglist, nr_pages_max);
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list_for_each_entry(page, pagelist, lru)
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sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
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return nr_pages;
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}
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static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
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struct list_head *pagelist)
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{
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struct sh_mobile_lcdc_chan *ch = info->par;
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struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
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/* enable clocks before accessing hardware */
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sh_mobile_lcdc_clk_on(ch->lcdc);
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/*
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* It's possible to get here without anything on the pagelist via
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* sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
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* invocation. In the former case, the acceleration routines are
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* stepped in to when using the framebuffer console causing the
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* workqueue to be scheduled without any dirty pages on the list.
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*
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* Despite this, a panel update is still needed given that the
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* acceleration routines have their own methods for writing in
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* that still need to be updated.
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*
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* The fsync() and empty pagelist case could be optimized for,
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* but we don't bother, as any application exhibiting such
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* behaviour is fundamentally broken anyways.
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*/
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if (!list_empty(pagelist)) {
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unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
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/* trigger panel update */
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dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
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if (bcfg->start_transfer)
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bcfg->start_transfer(bcfg->board_data, ch,
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&sh_mobile_lcdc_sys_bus_ops);
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lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
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dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
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} else {
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if (bcfg->start_transfer)
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bcfg->start_transfer(bcfg->board_data, ch,
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&sh_mobile_lcdc_sys_bus_ops);
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lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
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}
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}
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static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
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{
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struct fb_deferred_io *fbdefio = info->fbdefio;
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if (fbdefio)
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schedule_delayed_work(&info->deferred_work, fbdefio->delay);
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}
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static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
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{
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struct sh_mobile_lcdc_priv *priv = data;
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struct sh_mobile_lcdc_chan *ch;
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unsigned long ldintr;
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int is_sub;
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int k;
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/* Acknowledge interrupts and disable further VSYNC End IRQs. */
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ldintr = lcdc_read(priv, _LDINTR);
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lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
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/* figure out if this interrupt is for main or sub lcd */
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is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
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/* wake up channel and disable clocks */
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for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
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ch = &priv->ch[k];
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if (!ch->enabled)
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continue;
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/* Frame End */
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if (ldintr & LDINTR_FS) {
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if (is_sub == lcdc_chan_is_sublcd(ch)) {
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ch->frame_end = 1;
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wake_up(&ch->frame_end_wait);
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sh_mobile_lcdc_clk_off(priv);
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}
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}
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/* VSYNC End */
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if (ldintr & LDINTR_VES)
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complete(&ch->vsync_completion);
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}
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return IRQ_HANDLED;
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}
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static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
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int start)
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{
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unsigned long tmp = lcdc_read(priv, _LDCNT2R);
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int k;
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/* start or stop the lcdc */
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if (start)
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lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
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else
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lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
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/* wait until power is applied/stopped on all channels */
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for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
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if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
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while (1) {
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tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
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& LDPMR_LPS;
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if (start && tmp == LDPMR_LPS)
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break;
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if (!start && tmp == 0)
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break;
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cpu_relax();
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}
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if (!start)
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lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
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}
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static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
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{
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struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
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unsigned long h_total, hsync_pos, display_h_total;
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u32 tmp;
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tmp = ch->ldmt1r_value;
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tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
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tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
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tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
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tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
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tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
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tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
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tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
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lcdc_write_chan(ch, LDMT1R, tmp);
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/* setup SYS bus */
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lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
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lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
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/* horizontal configuration */
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h_total = display_var->xres + display_var->hsync_len +
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display_var->left_margin + display_var->right_margin;
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tmp = h_total / 8; /* HTCN */
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tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
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lcdc_write_chan(ch, LDHCNR, tmp);
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hsync_pos = display_var->xres + display_var->right_margin;
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tmp = hsync_pos / 8; /* HSYNP */
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tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
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lcdc_write_chan(ch, LDHSYNR, tmp);
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/* vertical configuration */
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tmp = display_var->yres + display_var->vsync_len +
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display_var->upper_margin + display_var->lower_margin; /* VTLN */
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tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
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lcdc_write_chan(ch, LDVLNR, tmp);
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tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
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tmp |= display_var->vsync_len << 16; /* VSYNW */
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lcdc_write_chan(ch, LDVSYNR, tmp);
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/* Adjust horizontal synchronisation for HDMI */
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display_h_total = display_var->xres + display_var->hsync_len +
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display_var->left_margin + display_var->right_margin;
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tmp = ((display_var->xres & 7) << 24) |
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((display_h_total & 7) << 16) |
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((display_var->hsync_len & 7) << 8) |
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(hsync_pos & 7);
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lcdc_write_chan(ch, LDHAJR, tmp);
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}
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/*
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* __sh_mobile_lcdc_start - Configure and tart the LCDC
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* @priv: LCDC device
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*
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* Configure all enabled channels and start the LCDC device. All external
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* devices (clocks, MERAM, panels, ...) are not touched by this function.
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*/
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static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
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{
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struct sh_mobile_lcdc_chan *ch;
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unsigned long tmp;
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int bpp = 0;
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int k, m;
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/* Enable LCDC channels. Read data from external memory, avoid using the
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* BEU for now.
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*/
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lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
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/* Stop the LCDC first and disable all interrupts. */
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sh_mobile_lcdc_start_stop(priv, 0);
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lcdc_write(priv, _LDINTR, 0);
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/* Configure power supply, dot clocks and start them. */
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tmp = priv->lddckr;
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for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
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ch = &priv->ch[k];
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if (!ch->enabled)
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continue;
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|
|
if (!bpp)
|
|
bpp = ch->info->var.bits_per_pixel;
|
|
|
|
/* Power supply */
|
|
lcdc_write_chan(ch, LDPMR, 0);
|
|
|
|
m = ch->cfg.clock_divider;
|
|
if (!m)
|
|
continue;
|
|
|
|
/* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
|
|
* denominator.
|
|
*/
|
|
lcdc_write_chan(ch, LDDCKPAT1R, 0);
|
|
lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
|
|
|
|
if (m == 1)
|
|
m = LDDCKR_MOSEL;
|
|
tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
|
|
}
|
|
|
|
lcdc_write(priv, _LDDCKR, tmp);
|
|
lcdc_write(priv, _LDDCKSTPR, 0);
|
|
lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
|
|
|
|
/* Setup geometry, format, frame buffer memory and operation mode. */
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
|
|
ch = &priv->ch[k];
|
|
if (!ch->enabled)
|
|
continue;
|
|
|
|
sh_mobile_lcdc_geometry(ch);
|
|
|
|
if (ch->info->var.nonstd) {
|
|
tmp = (ch->info->var.nonstd << 16);
|
|
switch (ch->info->var.bits_per_pixel) {
|
|
case 12:
|
|
tmp |= LDDFR_YF_420;
|
|
break;
|
|
case 16:
|
|
tmp |= LDDFR_YF_422;
|
|
break;
|
|
case 24:
|
|
default:
|
|
tmp |= LDDFR_YF_444;
|
|
break;
|
|
}
|
|
} else {
|
|
switch (ch->info->var.bits_per_pixel) {
|
|
case 16:
|
|
tmp = LDDFR_PKF_RGB16;
|
|
break;
|
|
case 24:
|
|
tmp = LDDFR_PKF_RGB24;
|
|
break;
|
|
case 32:
|
|
default:
|
|
tmp = LDDFR_PKF_ARGB32;
|
|
break;
|
|
}
|
|
}
|
|
|
|
lcdc_write_chan(ch, LDDFR, tmp);
|
|
lcdc_write_chan(ch, LDMLSR, ch->pitch);
|
|
lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
|
|
if (ch->info->var.nonstd)
|
|
lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
|
|
|
|
/* When using deferred I/O mode, configure the LCDC for one-shot
|
|
* operation and enable the frame end interrupt. Otherwise use
|
|
* continuous read mode.
|
|
*/
|
|
if (ch->ldmt1r_value & LDMT1R_IFM &&
|
|
ch->cfg.sys_bus_cfg.deferred_io_msec) {
|
|
lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
|
|
lcdc_write(priv, _LDINTR, LDINTR_FE);
|
|
} else {
|
|
lcdc_write_chan(ch, LDSM1R, 0);
|
|
}
|
|
}
|
|
|
|
/* Word and long word swap. */
|
|
if (priv->ch[0].info->var.nonstd)
|
|
tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
|
|
else {
|
|
switch (bpp) {
|
|
case 16:
|
|
tmp = LDDDSR_LS | LDDDSR_WS;
|
|
break;
|
|
case 24:
|
|
tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
|
|
break;
|
|
case 32:
|
|
default:
|
|
tmp = LDDDSR_LS;
|
|
break;
|
|
}
|
|
}
|
|
lcdc_write(priv, _LDDDSR, tmp);
|
|
|
|
/* Enable the display output. */
|
|
lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
|
|
sh_mobile_lcdc_start_stop(priv, 1);
|
|
priv->started = 1;
|
|
}
|
|
|
|
static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
|
|
{
|
|
struct sh_mobile_meram_info *mdev = priv->meram_dev;
|
|
struct sh_mobile_lcdc_board_cfg *board_cfg;
|
|
struct sh_mobile_lcdc_chan *ch;
|
|
unsigned long tmp;
|
|
int ret;
|
|
int k;
|
|
|
|
/* enable clocks before accessing the hardware */
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
|
|
if (priv->ch[k].enabled)
|
|
sh_mobile_lcdc_clk_on(priv);
|
|
}
|
|
|
|
/* reset */
|
|
lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
|
|
lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
|
|
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
|
|
ch = &priv->ch[k];
|
|
|
|
if (!ch->enabled)
|
|
continue;
|
|
|
|
board_cfg = &ch->cfg.board_cfg;
|
|
if (board_cfg->setup_sys) {
|
|
ret = board_cfg->setup_sys(board_cfg->board_data, ch,
|
|
&sh_mobile_lcdc_sys_bus_ops);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Compute frame buffer base address and pitch for each channel. */
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
|
|
struct sh_mobile_meram_cfg *cfg;
|
|
int pixelformat;
|
|
|
|
ch = &priv->ch[k];
|
|
if (!ch->enabled)
|
|
continue;
|
|
|
|
ch->base_addr_y = ch->info->fix.smem_start;
|
|
ch->base_addr_c = ch->base_addr_y
|
|
+ ch->info->var.xres
|
|
* ch->info->var.yres_virtual;
|
|
ch->pitch = ch->info->fix.line_length;
|
|
|
|
/* Enable MERAM if possible. */
|
|
cfg = ch->cfg.meram_cfg;
|
|
if (mdev == NULL || mdev->ops == NULL || cfg == NULL)
|
|
continue;
|
|
|
|
/* we need to de-init configured ICBs before we can
|
|
* re-initialize them.
|
|
*/
|
|
if (ch->meram_enabled) {
|
|
mdev->ops->meram_unregister(mdev, cfg);
|
|
ch->meram_enabled = 0;
|
|
}
|
|
|
|
if (!ch->info->var.nonstd)
|
|
pixelformat = SH_MOBILE_MERAM_PF_RGB;
|
|
else if (ch->info->var.bits_per_pixel == 24)
|
|
pixelformat = SH_MOBILE_MERAM_PF_NV24;
|
|
else
|
|
pixelformat = SH_MOBILE_MERAM_PF_NV;
|
|
|
|
ret = mdev->ops->meram_register(mdev, cfg, ch->pitch,
|
|
ch->info->var.yres, pixelformat,
|
|
ch->base_addr_y, ch->base_addr_c,
|
|
&ch->base_addr_y, &ch->base_addr_c,
|
|
&ch->pitch);
|
|
if (!ret)
|
|
ch->meram_enabled = 1;
|
|
}
|
|
|
|
/* Start the LCDC. */
|
|
__sh_mobile_lcdc_start(priv);
|
|
|
|
/* Setup deferred I/O, tell the board code to enable the panels, and
|
|
* turn backlight on.
|
|
*/
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
|
|
ch = &priv->ch[k];
|
|
if (!ch->enabled)
|
|
continue;
|
|
|
|
tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
|
|
if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
|
|
ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
|
|
ch->defio.delay = msecs_to_jiffies(tmp);
|
|
ch->info->fbdefio = &ch->defio;
|
|
fb_deferred_io_init(ch->info);
|
|
}
|
|
|
|
board_cfg = &ch->cfg.board_cfg;
|
|
if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
|
|
board_cfg->display_on(board_cfg->board_data, ch->info);
|
|
module_put(board_cfg->owner);
|
|
}
|
|
|
|
if (ch->bl) {
|
|
ch->bl->props.power = FB_BLANK_UNBLANK;
|
|
backlight_update_status(ch->bl);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch;
|
|
struct sh_mobile_lcdc_board_cfg *board_cfg;
|
|
int k;
|
|
|
|
/* clean up deferred io and ask board code to disable panel */
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
|
|
ch = &priv->ch[k];
|
|
if (!ch->enabled)
|
|
continue;
|
|
|
|
/* deferred io mode:
|
|
* flush frame, and wait for frame end interrupt
|
|
* clean up deferred io and enable clock
|
|
*/
|
|
if (ch->info && ch->info->fbdefio) {
|
|
ch->frame_end = 0;
|
|
schedule_delayed_work(&ch->info->deferred_work, 0);
|
|
wait_event(ch->frame_end_wait, ch->frame_end);
|
|
fb_deferred_io_cleanup(ch->info);
|
|
ch->info->fbdefio = NULL;
|
|
sh_mobile_lcdc_clk_on(priv);
|
|
}
|
|
|
|
if (ch->bl) {
|
|
ch->bl->props.power = FB_BLANK_POWERDOWN;
|
|
backlight_update_status(ch->bl);
|
|
}
|
|
|
|
board_cfg = &ch->cfg.board_cfg;
|
|
if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
|
|
board_cfg->display_off(board_cfg->board_data);
|
|
module_put(board_cfg->owner);
|
|
}
|
|
|
|
/* disable the meram */
|
|
if (ch->meram_enabled) {
|
|
struct sh_mobile_meram_cfg *cfg;
|
|
struct sh_mobile_meram_info *mdev;
|
|
cfg = ch->cfg.meram_cfg;
|
|
mdev = priv->meram_dev;
|
|
mdev->ops->meram_unregister(mdev, cfg);
|
|
ch->meram_enabled = 0;
|
|
}
|
|
|
|
}
|
|
|
|
/* stop the lcdc */
|
|
if (priv->started) {
|
|
sh_mobile_lcdc_start_stop(priv, 0);
|
|
priv->started = 0;
|
|
}
|
|
|
|
/* stop clocks */
|
|
for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
|
|
if (priv->ch[k].enabled)
|
|
sh_mobile_lcdc_clk_off(priv);
|
|
}
|
|
|
|
static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
|
|
{
|
|
int interface_type = ch->cfg.interface_type;
|
|
|
|
switch (interface_type) {
|
|
case RGB8:
|
|
case RGB9:
|
|
case RGB12A:
|
|
case RGB12B:
|
|
case RGB16:
|
|
case RGB18:
|
|
case RGB24:
|
|
case SYS8A:
|
|
case SYS8B:
|
|
case SYS8C:
|
|
case SYS8D:
|
|
case SYS9:
|
|
case SYS12:
|
|
case SYS16A:
|
|
case SYS16B:
|
|
case SYS16C:
|
|
case SYS18:
|
|
case SYS24:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* SUBLCD only supports SYS interface */
|
|
if (lcdc_chan_is_sublcd(ch)) {
|
|
if (!(interface_type & LDMT1R_IFM))
|
|
return -EINVAL;
|
|
|
|
interface_type &= ~LDMT1R_IFM;
|
|
}
|
|
|
|
ch->ldmt1r_value = interface_type;
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
|
|
int clock_source,
|
|
struct sh_mobile_lcdc_priv *priv)
|
|
{
|
|
char *str;
|
|
|
|
switch (clock_source) {
|
|
case LCDC_CLK_BUS:
|
|
str = "bus_clk";
|
|
priv->lddckr = LDDCKR_ICKSEL_BUS;
|
|
break;
|
|
case LCDC_CLK_PERIPHERAL:
|
|
str = "peripheral_clk";
|
|
priv->lddckr = LDDCKR_ICKSEL_MIPI;
|
|
break;
|
|
case LCDC_CLK_EXTERNAL:
|
|
str = NULL;
|
|
priv->lddckr = LDDCKR_ICKSEL_HDMI;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (str) {
|
|
priv->dot_clk = clk_get(&pdev->dev, str);
|
|
if (IS_ERR(priv->dot_clk)) {
|
|
dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
|
|
return PTR_ERR(priv->dot_clk);
|
|
}
|
|
}
|
|
|
|
/* Runtime PM support involves two step for this driver:
|
|
* 1) Enable Runtime PM
|
|
* 2) Force Runtime PM Resume since hardware is accessed from probe()
|
|
*/
|
|
priv->dev = &pdev->dev;
|
|
pm_runtime_enable(priv->dev);
|
|
pm_runtime_resume(priv->dev);
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_lcdc_setcolreg(u_int regno,
|
|
u_int red, u_int green, u_int blue,
|
|
u_int transp, struct fb_info *info)
|
|
{
|
|
u32 *palette = info->pseudo_palette;
|
|
|
|
if (regno >= PALETTE_NR)
|
|
return -EINVAL;
|
|
|
|
/* only FB_VISUAL_TRUECOLOR supported */
|
|
|
|
red >>= 16 - info->var.red.length;
|
|
green >>= 16 - info->var.green.length;
|
|
blue >>= 16 - info->var.blue.length;
|
|
transp >>= 16 - info->var.transp.length;
|
|
|
|
palette[regno] = (red << info->var.red.offset) |
|
|
(green << info->var.green.offset) |
|
|
(blue << info->var.blue.offset) |
|
|
(transp << info->var.transp.offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
|
|
.id = "SH Mobile LCDC",
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.visual = FB_VISUAL_TRUECOLOR,
|
|
.accel = FB_ACCEL_NONE,
|
|
.xpanstep = 0,
|
|
.ypanstep = 1,
|
|
.ywrapstep = 0,
|
|
};
|
|
|
|
static void sh_mobile_lcdc_fillrect(struct fb_info *info,
|
|
const struct fb_fillrect *rect)
|
|
{
|
|
sys_fillrect(info, rect);
|
|
sh_mobile_lcdc_deferred_io_touch(info);
|
|
}
|
|
|
|
static void sh_mobile_lcdc_copyarea(struct fb_info *info,
|
|
const struct fb_copyarea *area)
|
|
{
|
|
sys_copyarea(info, area);
|
|
sh_mobile_lcdc_deferred_io_touch(info);
|
|
}
|
|
|
|
static void sh_mobile_lcdc_imageblit(struct fb_info *info,
|
|
const struct fb_image *image)
|
|
{
|
|
sys_imageblit(info, image);
|
|
sh_mobile_lcdc_deferred_io_touch(info);
|
|
}
|
|
|
|
static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
struct sh_mobile_lcdc_priv *priv = ch->lcdc;
|
|
unsigned long ldrcntr;
|
|
unsigned long new_pan_offset;
|
|
unsigned long base_addr_y, base_addr_c;
|
|
unsigned long c_offset;
|
|
|
|
if (!info->var.nonstd)
|
|
new_pan_offset = var->yoffset * info->fix.line_length
|
|
+ var->xoffset * (info->var.bits_per_pixel / 8);
|
|
else
|
|
new_pan_offset = var->yoffset * info->fix.line_length
|
|
+ var->xoffset;
|
|
|
|
if (new_pan_offset == ch->pan_offset)
|
|
return 0; /* No change, do nothing */
|
|
|
|
ldrcntr = lcdc_read(priv, _LDRCNTR);
|
|
|
|
/* Set the source address for the next refresh */
|
|
base_addr_y = ch->dma_handle + new_pan_offset;
|
|
if (info->var.nonstd) {
|
|
/* Set y offset */
|
|
c_offset = var->yoffset * info->fix.line_length
|
|
* (info->var.bits_per_pixel - 8) / 8;
|
|
base_addr_c = ch->dma_handle
|
|
+ info->var.xres * info->var.yres_virtual
|
|
+ c_offset;
|
|
/* Set x offset */
|
|
if (info->var.bits_per_pixel == 24)
|
|
base_addr_c += 2 * var->xoffset;
|
|
else
|
|
base_addr_c += var->xoffset;
|
|
}
|
|
|
|
if (ch->meram_enabled) {
|
|
struct sh_mobile_meram_cfg *cfg;
|
|
struct sh_mobile_meram_info *mdev;
|
|
int ret;
|
|
|
|
cfg = ch->cfg.meram_cfg;
|
|
mdev = priv->meram_dev;
|
|
ret = mdev->ops->meram_update(mdev, cfg,
|
|
base_addr_y, base_addr_c,
|
|
&base_addr_y, &base_addr_c);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ch->base_addr_y = base_addr_y;
|
|
ch->base_addr_c = base_addr_c;
|
|
|
|
lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
|
|
if (info->var.nonstd)
|
|
lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
|
|
|
|
if (lcdc_chan_is_sublcd(ch))
|
|
lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
|
|
else
|
|
lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
|
|
|
|
ch->pan_offset = new_pan_offset;
|
|
|
|
sh_mobile_lcdc_deferred_io_touch(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_wait_for_vsync(struct fb_info *info)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
unsigned long ldintr;
|
|
int ret;
|
|
|
|
/* Enable VSync End interrupt and be careful not to acknowledge any
|
|
* pending interrupt.
|
|
*/
|
|
ldintr = lcdc_read(ch->lcdc, _LDINTR);
|
|
ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
|
|
lcdc_write(ch->lcdc, _LDINTR, ldintr);
|
|
|
|
ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
|
|
msecs_to_jiffies(100));
|
|
if (!ret)
|
|
return -ETIMEDOUT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int retval;
|
|
|
|
switch (cmd) {
|
|
case FBIO_WAITFORVSYNC:
|
|
retval = sh_mobile_wait_for_vsync(info);
|
|
break;
|
|
|
|
default:
|
|
retval = -ENOIOCTLCMD;
|
|
break;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static void sh_mobile_fb_reconfig(struct fb_info *info)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
struct fb_videomode mode1, mode2;
|
|
struct fb_event event;
|
|
int evnt = FB_EVENT_MODE_CHANGE_ALL;
|
|
|
|
if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
|
|
/* More framebuffer users are active */
|
|
return;
|
|
|
|
fb_var_to_videomode(&mode1, &ch->display_var);
|
|
fb_var_to_videomode(&mode2, &info->var);
|
|
|
|
if (fb_mode_is_equal(&mode1, &mode2))
|
|
return;
|
|
|
|
/* Display has been re-plugged, framebuffer is free now, reconfigure */
|
|
if (fb_set_var(info, &ch->display_var) < 0)
|
|
/* Couldn't reconfigure, hopefully, can continue as before */
|
|
return;
|
|
|
|
/*
|
|
* fb_set_var() calls the notifier change internally, only if
|
|
* FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
|
|
* user event, we have to call the chain ourselves.
|
|
*/
|
|
event.info = info;
|
|
event.data = &mode1;
|
|
fb_notifier_call_chain(evnt, &event);
|
|
}
|
|
|
|
/*
|
|
* Locking: both .fb_release() and .fb_open() are called with info->lock held if
|
|
* user == 1, or with console sem held, if user == 0.
|
|
*/
|
|
static int sh_mobile_release(struct fb_info *info, int user)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
|
|
mutex_lock(&ch->open_lock);
|
|
dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
|
|
|
|
ch->use_count--;
|
|
|
|
/* Nothing to reconfigure, when called from fbcon */
|
|
if (user) {
|
|
console_lock();
|
|
sh_mobile_fb_reconfig(info);
|
|
console_unlock();
|
|
}
|
|
|
|
mutex_unlock(&ch->open_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_open(struct fb_info *info, int user)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
|
|
mutex_lock(&ch->open_lock);
|
|
ch->use_count++;
|
|
|
|
dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
|
|
mutex_unlock(&ch->open_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
struct sh_mobile_lcdc_priv *p = ch->lcdc;
|
|
unsigned int best_dist = (unsigned int)-1;
|
|
unsigned int best_xres = 0;
|
|
unsigned int best_yres = 0;
|
|
unsigned int i;
|
|
|
|
if (var->xres > MAX_XRES || var->yres > MAX_YRES)
|
|
return -EINVAL;
|
|
|
|
/* If board code provides us with a list of available modes, make sure
|
|
* we use one of them. Find the mode closest to the requested one. The
|
|
* distance between two modes is defined as the size of the
|
|
* non-overlapping parts of the two rectangles.
|
|
*/
|
|
for (i = 0; i < ch->cfg.num_cfg; ++i) {
|
|
const struct fb_videomode *mode = &ch->cfg.lcd_cfg[i];
|
|
unsigned int dist;
|
|
|
|
/* We can only round up. */
|
|
if (var->xres > mode->xres || var->yres > mode->yres)
|
|
continue;
|
|
|
|
dist = var->xres * var->yres + mode->xres * mode->yres
|
|
- 2 * min(var->xres, mode->xres)
|
|
* min(var->yres, mode->yres);
|
|
|
|
if (dist < best_dist) {
|
|
best_xres = mode->xres;
|
|
best_yres = mode->yres;
|
|
best_dist = dist;
|
|
}
|
|
}
|
|
|
|
/* If no available mode can be used, return an error. */
|
|
if (ch->cfg.num_cfg != 0) {
|
|
if (best_dist == (unsigned int)-1)
|
|
return -EINVAL;
|
|
|
|
var->xres = best_xres;
|
|
var->yres = best_yres;
|
|
}
|
|
|
|
/* Make sure the virtual resolution is at least as big as the visible
|
|
* resolution.
|
|
*/
|
|
if (var->xres_virtual < var->xres)
|
|
var->xres_virtual = var->xres;
|
|
if (var->yres_virtual < var->yres)
|
|
var->yres_virtual = var->yres;
|
|
|
|
if (var->bits_per_pixel <= 16) { /* RGB 565 */
|
|
var->bits_per_pixel = 16;
|
|
var->red.offset = 11;
|
|
var->red.length = 5;
|
|
var->green.offset = 5;
|
|
var->green.length = 6;
|
|
var->blue.offset = 0;
|
|
var->blue.length = 5;
|
|
var->transp.offset = 0;
|
|
var->transp.length = 0;
|
|
} else if (var->bits_per_pixel <= 24) { /* RGB 888 */
|
|
var->bits_per_pixel = 24;
|
|
var->red.offset = 16;
|
|
var->red.length = 8;
|
|
var->green.offset = 8;
|
|
var->green.length = 8;
|
|
var->blue.offset = 0;
|
|
var->blue.length = 8;
|
|
var->transp.offset = 0;
|
|
var->transp.length = 0;
|
|
} else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
|
|
var->bits_per_pixel = 32;
|
|
var->red.offset = 16;
|
|
var->red.length = 8;
|
|
var->green.offset = 8;
|
|
var->green.length = 8;
|
|
var->blue.offset = 0;
|
|
var->blue.length = 8;
|
|
var->transp.offset = 24;
|
|
var->transp.length = 8;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
var->red.msb_right = 0;
|
|
var->green.msb_right = 0;
|
|
var->blue.msb_right = 0;
|
|
var->transp.msb_right = 0;
|
|
|
|
/* Make sure we don't exceed our allocated memory. */
|
|
if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
|
|
info->fix.smem_len)
|
|
return -EINVAL;
|
|
|
|
/* only accept the forced_bpp for dual channel configurations */
|
|
if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_set_par(struct fb_info *info)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
u32 line_length = info->fix.line_length;
|
|
int ret;
|
|
|
|
sh_mobile_lcdc_stop(ch->lcdc);
|
|
|
|
if (info->var.nonstd)
|
|
info->fix.line_length = info->var.xres;
|
|
else
|
|
info->fix.line_length = info->var.xres
|
|
* info->var.bits_per_pixel / 8;
|
|
|
|
ret = sh_mobile_lcdc_start(ch->lcdc);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
|
|
info->fix.line_length = line_length;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Screen blanking. Behavior is as follows:
|
|
* FB_BLANK_UNBLANK: screen unblanked, clocks enabled
|
|
* FB_BLANK_NORMAL: screen blanked, clocks enabled
|
|
* FB_BLANK_VSYNC,
|
|
* FB_BLANK_HSYNC,
|
|
* FB_BLANK_POWEROFF: screen blanked, clocks disabled
|
|
*/
|
|
static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
struct sh_mobile_lcdc_priv *p = ch->lcdc;
|
|
|
|
/* blank the screen? */
|
|
if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
|
|
struct fb_fillrect rect = {
|
|
.width = info->var.xres,
|
|
.height = info->var.yres,
|
|
};
|
|
sh_mobile_lcdc_fillrect(info, &rect);
|
|
}
|
|
/* turn clocks on? */
|
|
if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
|
|
sh_mobile_lcdc_clk_on(p);
|
|
}
|
|
/* turn clocks off? */
|
|
if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
|
|
/* make sure the screen is updated with the black fill before
|
|
* switching the clocks off. one vsync is not enough since
|
|
* blanking may occur in the middle of a refresh. deferred io
|
|
* mode will reenable the clocks and update the screen in time,
|
|
* so it does not need this. */
|
|
if (!info->fbdefio) {
|
|
sh_mobile_wait_for_vsync(info);
|
|
sh_mobile_wait_for_vsync(info);
|
|
}
|
|
sh_mobile_lcdc_clk_off(p);
|
|
}
|
|
|
|
ch->blank_status = blank;
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops sh_mobile_lcdc_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_setcolreg = sh_mobile_lcdc_setcolreg,
|
|
.fb_read = fb_sys_read,
|
|
.fb_write = fb_sys_write,
|
|
.fb_fillrect = sh_mobile_lcdc_fillrect,
|
|
.fb_copyarea = sh_mobile_lcdc_copyarea,
|
|
.fb_imageblit = sh_mobile_lcdc_imageblit,
|
|
.fb_blank = sh_mobile_lcdc_blank,
|
|
.fb_pan_display = sh_mobile_fb_pan_display,
|
|
.fb_ioctl = sh_mobile_ioctl,
|
|
.fb_open = sh_mobile_open,
|
|
.fb_release = sh_mobile_release,
|
|
.fb_check_var = sh_mobile_check_var,
|
|
.fb_set_par = sh_mobile_set_par,
|
|
};
|
|
|
|
static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
|
|
struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
|
|
int brightness = bdev->props.brightness;
|
|
|
|
if (bdev->props.power != FB_BLANK_UNBLANK ||
|
|
bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
|
|
brightness = 0;
|
|
|
|
return cfg->set_brightness(cfg->board_data, brightness);
|
|
}
|
|
|
|
static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
|
|
{
|
|
struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
|
|
struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
|
|
|
|
return cfg->get_brightness(cfg->board_data);
|
|
}
|
|
|
|
static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
|
|
struct fb_info *info)
|
|
{
|
|
return (info->bl_dev == bdev);
|
|
}
|
|
|
|
static struct backlight_ops sh_mobile_lcdc_bl_ops = {
|
|
.options = BL_CORE_SUSPENDRESUME,
|
|
.update_status = sh_mobile_lcdc_update_bl,
|
|
.get_brightness = sh_mobile_lcdc_get_brightness,
|
|
.check_fb = sh_mobile_lcdc_check_fb,
|
|
};
|
|
|
|
static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
|
|
struct sh_mobile_lcdc_chan *ch)
|
|
{
|
|
struct backlight_device *bl;
|
|
|
|
bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
|
|
&sh_mobile_lcdc_bl_ops, NULL);
|
|
if (IS_ERR(bl)) {
|
|
dev_err(parent, "unable to register backlight device: %ld\n",
|
|
PTR_ERR(bl));
|
|
return NULL;
|
|
}
|
|
|
|
bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
|
|
bl->props.brightness = bl->props.max_brightness;
|
|
backlight_update_status(bl);
|
|
|
|
return bl;
|
|
}
|
|
|
|
static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
|
|
{
|
|
backlight_device_unregister(bdev);
|
|
}
|
|
|
|
static int sh_mobile_lcdc_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
|
|
sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_lcdc_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
|
|
return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
|
|
}
|
|
|
|
static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
|
|
|
|
/* turn off LCDC hardware */
|
|
lcdc_write(priv, _LDCNT1R, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_lcdc_runtime_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
|
|
|
|
__sh_mobile_lcdc_start(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
|
|
.suspend = sh_mobile_lcdc_suspend,
|
|
.resume = sh_mobile_lcdc_resume,
|
|
.runtime_suspend = sh_mobile_lcdc_runtime_suspend,
|
|
.runtime_resume = sh_mobile_lcdc_runtime_resume,
|
|
};
|
|
|
|
/* locking: called with info->lock held */
|
|
static int sh_mobile_lcdc_notify(struct notifier_block *nb,
|
|
unsigned long action, void *data)
|
|
{
|
|
struct fb_event *event = data;
|
|
struct fb_info *info = event->info;
|
|
struct sh_mobile_lcdc_chan *ch = info->par;
|
|
struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
|
|
|
|
if (&ch->lcdc->notifier != nb)
|
|
return NOTIFY_DONE;
|
|
|
|
dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
|
|
__func__, action, event->data);
|
|
|
|
switch(action) {
|
|
case FB_EVENT_SUSPEND:
|
|
if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
|
|
board_cfg->display_off(board_cfg->board_data);
|
|
module_put(board_cfg->owner);
|
|
}
|
|
sh_mobile_lcdc_stop(ch->lcdc);
|
|
break;
|
|
case FB_EVENT_RESUME:
|
|
mutex_lock(&ch->open_lock);
|
|
sh_mobile_fb_reconfig(info);
|
|
mutex_unlock(&ch->open_lock);
|
|
|
|
/* HDMI must be enabled before LCDC configuration */
|
|
if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
|
|
board_cfg->display_on(board_cfg->board_data, info);
|
|
module_put(board_cfg->owner);
|
|
}
|
|
|
|
sh_mobile_lcdc_start(ch->lcdc);
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int sh_mobile_lcdc_remove(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
|
|
struct fb_info *info;
|
|
int i;
|
|
|
|
fb_unregister_client(&priv->notifier);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
|
|
if (priv->ch[i].info && priv->ch[i].info->dev)
|
|
unregister_framebuffer(priv->ch[i].info);
|
|
|
|
sh_mobile_lcdc_stop(priv);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
|
|
info = priv->ch[i].info;
|
|
|
|
if (!info || !info->device)
|
|
continue;
|
|
|
|
if (priv->ch[i].sglist)
|
|
vfree(priv->ch[i].sglist);
|
|
|
|
if (info->screen_base)
|
|
dma_free_coherent(&pdev->dev, info->fix.smem_len,
|
|
info->screen_base,
|
|
priv->ch[i].dma_handle);
|
|
fb_dealloc_cmap(&info->cmap);
|
|
framebuffer_release(info);
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
|
|
if (priv->ch[i].bl)
|
|
sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
|
|
}
|
|
|
|
if (priv->dot_clk)
|
|
clk_put(priv->dot_clk);
|
|
|
|
if (priv->dev)
|
|
pm_runtime_disable(priv->dev);
|
|
|
|
if (priv->base)
|
|
iounmap(priv->base);
|
|
|
|
if (priv->irq)
|
|
free_irq(priv->irq, priv);
|
|
kfree(priv);
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch,
|
|
struct device *dev)
|
|
{
|
|
struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
|
|
const struct fb_videomode *max_mode;
|
|
const struct fb_videomode *mode;
|
|
struct fb_var_screeninfo *var;
|
|
struct fb_info *info;
|
|
unsigned int max_size;
|
|
int num_cfg;
|
|
void *buf;
|
|
int ret;
|
|
int i;
|
|
|
|
mutex_init(&ch->open_lock);
|
|
|
|
/* Allocate the frame buffer device. */
|
|
ch->info = framebuffer_alloc(0, dev);
|
|
if (!ch->info) {
|
|
dev_err(dev, "unable to allocate fb_info\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info = ch->info;
|
|
info->fbops = &sh_mobile_lcdc_ops;
|
|
info->par = ch;
|
|
info->pseudo_palette = &ch->pseudo_palette;
|
|
info->flags = FBINFO_FLAG_DEFAULT;
|
|
|
|
/* Iterate through the modes to validate them and find the highest
|
|
* resolution.
|
|
*/
|
|
max_mode = NULL;
|
|
max_size = 0;
|
|
|
|
for (i = 0, mode = cfg->lcd_cfg; i < cfg->num_cfg; i++, mode++) {
|
|
unsigned int size = mode->yres * mode->xres;
|
|
|
|
/* NV12 buffers must have even number of lines */
|
|
if ((cfg->nonstd) && cfg->bpp == 12 &&
|
|
(mode->yres & 0x1)) {
|
|
dev_err(dev, "yres must be multiple of 2 for YCbCr420 "
|
|
"mode.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (size > max_size) {
|
|
max_mode = mode;
|
|
max_size = size;
|
|
}
|
|
}
|
|
|
|
if (!max_size)
|
|
max_size = MAX_XRES * MAX_YRES;
|
|
else
|
|
dev_dbg(dev, "Found largest videomode %ux%u\n",
|
|
max_mode->xres, max_mode->yres);
|
|
|
|
/* Initialize fixed screen information. Restrict pan to 2 lines steps
|
|
* for NV12.
|
|
*/
|
|
info->fix = sh_mobile_lcdc_fix;
|
|
info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
|
|
if (cfg->nonstd && cfg->bpp == 12)
|
|
info->fix.ypanstep = 2;
|
|
|
|
/* Create the mode list. */
|
|
if (cfg->lcd_cfg == NULL) {
|
|
mode = &default_720p;
|
|
num_cfg = 1;
|
|
} else {
|
|
mode = cfg->lcd_cfg;
|
|
num_cfg = cfg->num_cfg;
|
|
}
|
|
|
|
fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
|
|
|
|
/* Initialize variable screen information using the first mode as
|
|
* default. The default Y virtual resolution is twice the panel size to
|
|
* allow for double-buffering.
|
|
*/
|
|
var = &info->var;
|
|
fb_videomode_to_var(var, mode);
|
|
var->bits_per_pixel = cfg->bpp;
|
|
var->width = cfg->lcd_size_cfg.width;
|
|
var->height = cfg->lcd_size_cfg.height;
|
|
var->yres_virtual = var->yres * 2;
|
|
var->activate = FB_ACTIVATE_NOW;
|
|
|
|
ret = sh_mobile_check_var(var, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Allocate frame buffer memory and color map. */
|
|
buf = dma_alloc_coherent(dev, info->fix.smem_len, &ch->dma_handle,
|
|
GFP_KERNEL);
|
|
if (!buf) {
|
|
dev_err(dev, "unable to allocate buffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
|
|
if (ret < 0) {
|
|
dev_err(dev, "unable to allocate cmap\n");
|
|
dma_free_coherent(dev, info->fix.smem_len,
|
|
buf, ch->dma_handle);
|
|
return ret;
|
|
}
|
|
|
|
info->fix.smem_start = ch->dma_handle;
|
|
if (var->nonstd)
|
|
info->fix.line_length = var->xres;
|
|
else
|
|
info->fix.line_length = var->xres * (cfg->bpp / 8);
|
|
|
|
info->screen_base = buf;
|
|
info->device = dev;
|
|
ch->display_var = *var;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
|
|
struct sh_mobile_lcdc_priv *priv;
|
|
struct resource *res;
|
|
int num_channels;
|
|
int error;
|
|
int i;
|
|
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "no platform data defined\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
i = platform_get_irq(pdev, 0);
|
|
if (!res || i < 0) {
|
|
dev_err(&pdev->dev, "cannot get platform resources\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(&pdev->dev, "cannot allocate device data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
error = request_irq(i, sh_mobile_lcdc_irq, 0,
|
|
dev_name(&pdev->dev), priv);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "unable to request irq\n");
|
|
goto err1;
|
|
}
|
|
|
|
priv->irq = i;
|
|
atomic_set(&priv->hw_usecnt, -1);
|
|
|
|
for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
|
|
struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
|
|
|
|
ch->lcdc = priv;
|
|
memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
|
|
|
|
error = sh_mobile_lcdc_check_interface(ch);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "unsupported interface type\n");
|
|
goto err1;
|
|
}
|
|
init_waitqueue_head(&ch->frame_end_wait);
|
|
init_completion(&ch->vsync_completion);
|
|
ch->pan_offset = 0;
|
|
|
|
/* probe the backlight is there is one defined */
|
|
if (ch->cfg.bl_info.max_brightness)
|
|
ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
|
|
|
|
switch (pdata->ch[i].chan) {
|
|
case LCDC_CHAN_MAINLCD:
|
|
ch->enabled = LDCNT2R_ME;
|
|
ch->reg_offs = lcdc_offs_mainlcd;
|
|
num_channels++;
|
|
break;
|
|
case LCDC_CHAN_SUBLCD:
|
|
ch->enabled = LDCNT2R_SE;
|
|
ch->reg_offs = lcdc_offs_sublcd;
|
|
num_channels++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!num_channels) {
|
|
dev_err(&pdev->dev, "no channels defined\n");
|
|
error = -EINVAL;
|
|
goto err1;
|
|
}
|
|
|
|
/* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
|
|
if (num_channels == 2)
|
|
priv->forced_bpp = pdata->ch[0].bpp;
|
|
|
|
priv->base = ioremap_nocache(res->start, resource_size(res));
|
|
if (!priv->base)
|
|
goto err1;
|
|
|
|
error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "unable to setup clocks\n");
|
|
goto err1;
|
|
}
|
|
|
|
priv->meram_dev = pdata->meram_dev;
|
|
|
|
for (i = 0; i < num_channels; i++) {
|
|
struct sh_mobile_lcdc_chan *ch = priv->ch + i;
|
|
|
|
error = sh_mobile_lcdc_channel_init(ch, &pdev->dev);
|
|
if (error)
|
|
goto err1;
|
|
}
|
|
|
|
error = sh_mobile_lcdc_start(priv);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "unable to start hardware\n");
|
|
goto err1;
|
|
}
|
|
|
|
for (i = 0; i < num_channels; i++) {
|
|
struct sh_mobile_lcdc_chan *ch = priv->ch + i;
|
|
struct fb_info *info = ch->info;
|
|
|
|
if (info->fbdefio) {
|
|
ch->sglist = vmalloc(sizeof(struct scatterlist) *
|
|
info->fix.smem_len >> PAGE_SHIFT);
|
|
if (!ch->sglist) {
|
|
dev_err(&pdev->dev, "cannot allocate sglist\n");
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
info->bl_dev = ch->bl;
|
|
|
|
error = register_framebuffer(info);
|
|
if (error < 0)
|
|
goto err1;
|
|
|
|
dev_info(info->dev,
|
|
"registered %s/%s as %dx%d %dbpp.\n",
|
|
pdev->name,
|
|
(ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
|
|
"mainlcd" : "sublcd",
|
|
info->var.xres, info->var.yres,
|
|
ch->cfg.bpp);
|
|
|
|
/* deferred io mode: disable clock to save power */
|
|
if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
|
|
sh_mobile_lcdc_clk_off(priv);
|
|
}
|
|
|
|
/* Failure ignored */
|
|
priv->notifier.notifier_call = sh_mobile_lcdc_notify;
|
|
fb_register_client(&priv->notifier);
|
|
|
|
return 0;
|
|
err1:
|
|
sh_mobile_lcdc_remove(pdev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static struct platform_driver sh_mobile_lcdc_driver = {
|
|
.driver = {
|
|
.name = "sh_mobile_lcdc_fb",
|
|
.owner = THIS_MODULE,
|
|
.pm = &sh_mobile_lcdc_dev_pm_ops,
|
|
},
|
|
.probe = sh_mobile_lcdc_probe,
|
|
.remove = sh_mobile_lcdc_remove,
|
|
};
|
|
|
|
static int __init sh_mobile_lcdc_init(void)
|
|
{
|
|
return platform_driver_register(&sh_mobile_lcdc_driver);
|
|
}
|
|
|
|
static void __exit sh_mobile_lcdc_exit(void)
|
|
{
|
|
platform_driver_unregister(&sh_mobile_lcdc_driver);
|
|
}
|
|
|
|
module_init(sh_mobile_lcdc_init);
|
|
module_exit(sh_mobile_lcdc_exit);
|
|
|
|
MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
|
|
MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
|
|
MODULE_LICENSE("GPL v2");
|