linux/drivers/video/msm/mdp.c
Daniel Walker 529d1a3619 drivers: video: msm: drop some unused variables
Just dropping a couple of warnings from this driver,

linux-2.6/drivers/video/msm/mdp.c: In function 'get_img':
linux-2.6/drivers/video/msm/mdp.c:261: warning: unused variable 'vstart'

linux-2.6/drivers/video/msm/mddi.c: In function 'mddi_handle_rev_data_avail':
linux-2.6/drivers/video/msm/mddi.c:193: warning: unused variable 'i'
linux-2.6/drivers/video/msm/mddi.c:190: warning: unused variable 'rev'

Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
2010-06-17 14:29:54 -07:00

520 lines
14 KiB
C

/* drivers/video/msm_fb/mdp.c
*
* MSM MDP Interface (used by framebuffer core)
*
* Copyright (C) 2007 QUALCOMM Incorporated
* Copyright (C) 2007 Google Incorporated
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/msm_mdp.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/clk.h>
#include <linux/file.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <mach/msm_iomap.h>
#include <mach/msm_fb.h>
#include <linux/platform_device.h>
#include "mdp_hw.h"
struct class *mdp_class;
#define MDP_CMD_DEBUG_ACCESS_BASE (0x10000)
static uint16_t mdp_default_ccs[] = {
0x254, 0x000, 0x331, 0x254, 0xF38, 0xE61, 0x254, 0x409, 0x000,
0x010, 0x080, 0x080
};
static DECLARE_WAIT_QUEUE_HEAD(mdp_dma2_waitqueue);
static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue);
static struct msmfb_callback *dma_callback;
static struct clk *clk;
static unsigned int mdp_irq_mask;
static DEFINE_SPINLOCK(mdp_lock);
DEFINE_MUTEX(mdp_mutex);
static int enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
{
unsigned long irq_flags;
int ret = 0;
BUG_ON(!mask);
spin_lock_irqsave(&mdp_lock, irq_flags);
/* if the mask bits are already set return an error, this interrupt
* is already enabled */
if (mdp_irq_mask & mask) {
printk(KERN_ERR "mdp irq already on already on %x %x\n",
mdp_irq_mask, mask);
ret = -1;
}
/* if the mdp irq is not already enabled enable it */
if (!mdp_irq_mask) {
if (clk)
clk_enable(clk);
enable_irq(mdp->irq);
}
/* update the irq mask to reflect the fact that the interrupt is
* enabled */
mdp_irq_mask |= mask;
spin_unlock_irqrestore(&mdp_lock, irq_flags);
return ret;
}
static int locked_disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
{
/* this interrupt is already disabled! */
if (!(mdp_irq_mask & mask)) {
printk(KERN_ERR "mdp irq already off %x %x\n",
mdp_irq_mask, mask);
return -1;
}
/* update the irq mask to reflect the fact that the interrupt is
* disabled */
mdp_irq_mask &= ~(mask);
/* if no one is waiting on the interrupt, disable it */
if (!mdp_irq_mask) {
disable_irq(mdp->irq);
if (clk)
clk_disable(clk);
}
return 0;
}
static int disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
{
unsigned long irq_flags;
int ret;
spin_lock_irqsave(&mdp_lock, irq_flags);
ret = locked_disable_mdp_irq(mdp, mask);
spin_unlock_irqrestore(&mdp_lock, irq_flags);
return ret;
}
static irqreturn_t mdp_isr(int irq, void *data)
{
uint32_t status;
unsigned long irq_flags;
struct mdp_info *mdp = data;
spin_lock_irqsave(&mdp_lock, irq_flags);
status = mdp_readl(mdp, MDP_INTR_STATUS);
mdp_writel(mdp, status, MDP_INTR_CLEAR);
status &= mdp_irq_mask;
if (status & DL0_DMA2_TERM_DONE) {
if (dma_callback) {
dma_callback->func(dma_callback);
dma_callback = NULL;
}
wake_up(&mdp_dma2_waitqueue);
}
if (status & DL0_ROI_DONE)
wake_up(&mdp_ppp_waitqueue);
if (status)
locked_disable_mdp_irq(mdp, status);
spin_unlock_irqrestore(&mdp_lock, irq_flags);
return IRQ_HANDLED;
}
static uint32_t mdp_check_mask(uint32_t mask)
{
uint32_t ret;
unsigned long irq_flags;
spin_lock_irqsave(&mdp_lock, irq_flags);
ret = mdp_irq_mask & mask;
spin_unlock_irqrestore(&mdp_lock, irq_flags);
return ret;
}
static int mdp_wait(struct mdp_info *mdp, uint32_t mask, wait_queue_head_t *wq)
{
int ret = 0;
unsigned long irq_flags;
wait_event_timeout(*wq, !mdp_check_mask(mask), HZ);
spin_lock_irqsave(&mdp_lock, irq_flags);
if (mdp_irq_mask & mask) {
locked_disable_mdp_irq(mdp, mask);
printk(KERN_WARNING "timeout waiting for mdp to complete %x\n",
mask);
ret = -ETIMEDOUT;
}
spin_unlock_irqrestore(&mdp_lock, irq_flags);
return ret;
}
void mdp_dma_wait(struct mdp_device *mdp_dev)
{
#define MDP_MAX_TIMEOUTS 20
static int timeout_count;
struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
if (mdp_wait(mdp, DL0_DMA2_TERM_DONE, &mdp_dma2_waitqueue) == -ETIMEDOUT)
timeout_count++;
else
timeout_count = 0;
if (timeout_count > MDP_MAX_TIMEOUTS) {
printk(KERN_ERR "mdp: dma failed %d times, somethings wrong!\n",
MDP_MAX_TIMEOUTS);
BUG();
}
}
static int mdp_ppp_wait(struct mdp_info *mdp)
{
return mdp_wait(mdp, DL0_ROI_DONE, &mdp_ppp_waitqueue);
}
void mdp_dma_to_mddi(struct mdp_info *mdp, uint32_t addr, uint32_t stride,
uint32_t width, uint32_t height, uint32_t x, uint32_t y,
struct msmfb_callback *callback)
{
uint32_t dma2_cfg;
uint16_t ld_param = 0; /* 0=PRIM, 1=SECD, 2=EXT */
if (enable_mdp_irq(mdp, DL0_DMA2_TERM_DONE)) {
printk(KERN_ERR "mdp_dma_to_mddi: busy\n");
return;
}
dma_callback = callback;
dma2_cfg = DMA_PACK_TIGHT |
DMA_PACK_ALIGN_LSB |
DMA_PACK_PATTERN_RGB |
DMA_OUT_SEL_AHB |
DMA_IBUF_NONCONTIGUOUS;
dma2_cfg |= DMA_IBUF_FORMAT_RGB565;
dma2_cfg |= DMA_OUT_SEL_MDDI;
dma2_cfg |= DMA_MDDI_DMAOUT_LCD_SEL_PRIMARY;
dma2_cfg |= DMA_DITHER_EN;
/* setup size, address, and stride */
mdp_writel(mdp, (height << 16) | (width),
MDP_CMD_DEBUG_ACCESS_BASE + 0x0184);
mdp_writel(mdp, addr, MDP_CMD_DEBUG_ACCESS_BASE + 0x0188);
mdp_writel(mdp, stride, MDP_CMD_DEBUG_ACCESS_BASE + 0x018C);
/* 666 18BPP */
dma2_cfg |= DMA_DSTC0G_6BITS | DMA_DSTC1B_6BITS | DMA_DSTC2R_6BITS;
/* set y & x offset and MDDI transaction parameters */
mdp_writel(mdp, (y << 16) | (x), MDP_CMD_DEBUG_ACCESS_BASE + 0x0194);
mdp_writel(mdp, ld_param, MDP_CMD_DEBUG_ACCESS_BASE + 0x01a0);
mdp_writel(mdp, (MDDI_VDO_PACKET_DESC << 16) | MDDI_VDO_PACKET_PRIM,
MDP_CMD_DEBUG_ACCESS_BASE + 0x01a4);
mdp_writel(mdp, dma2_cfg, MDP_CMD_DEBUG_ACCESS_BASE + 0x0180);
/* start DMA2 */
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0044);
}
void mdp_dma(struct mdp_device *mdp_dev, uint32_t addr, uint32_t stride,
uint32_t width, uint32_t height, uint32_t x, uint32_t y,
struct msmfb_callback *callback, int interface)
{
struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
if (interface == MSM_MDDI_PMDH_INTERFACE) {
mdp_dma_to_mddi(mdp, addr, stride, width, height, x, y,
callback);
}
}
int get_img(struct mdp_img *img, struct fb_info *info,
unsigned long *start, unsigned long *len,
struct file **filep)
{
int put_needed, ret = 0;
struct file *file;
file = fget_light(img->memory_id, &put_needed);
if (file == NULL)
return -1;
if (MAJOR(file->f_dentry->d_inode->i_rdev) == FB_MAJOR) {
*start = info->fix.smem_start;
*len = info->fix.smem_len;
} else
ret = -1;
fput_light(file, put_needed);
return ret;
}
void put_img(struct file *src_file, struct file *dst_file)
{
}
int mdp_blit(struct mdp_device *mdp_dev, struct fb_info *fb,
struct mdp_blit_req *req)
{
int ret;
unsigned long src_start = 0, src_len = 0, dst_start = 0, dst_len = 0;
struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
struct file *src_file = 0, *dst_file = 0;
/* WORKAROUND FOR HARDWARE BUG IN BG TILE FETCH */
if (unlikely(req->src_rect.h == 0 ||
req->src_rect.w == 0)) {
printk(KERN_ERR "mpd_ppp: src img of zero size!\n");
return -EINVAL;
}
if (unlikely(req->dst_rect.h == 0 ||
req->dst_rect.w == 0))
return -EINVAL;
/* do this first so that if this fails, the caller can always
* safely call put_img */
if (unlikely(get_img(&req->src, fb, &src_start, &src_len, &src_file))) {
printk(KERN_ERR "mpd_ppp: could not retrieve src image from "
"memory\n");
return -EINVAL;
}
if (unlikely(get_img(&req->dst, fb, &dst_start, &dst_len, &dst_file))) {
printk(KERN_ERR "mpd_ppp: could not retrieve dst image from "
"memory\n");
return -EINVAL;
}
mutex_lock(&mdp_mutex);
/* transp_masking unimplemented */
req->transp_mask = MDP_TRANSP_NOP;
if (unlikely((req->transp_mask != MDP_TRANSP_NOP ||
req->alpha != MDP_ALPHA_NOP ||
HAS_ALPHA(req->src.format)) &&
(req->flags & MDP_ROT_90 &&
req->dst_rect.w <= 16 && req->dst_rect.h >= 16))) {
int i;
unsigned int tiles = req->dst_rect.h / 16;
unsigned int remainder = req->dst_rect.h % 16;
req->src_rect.w = 16*req->src_rect.w / req->dst_rect.h;
req->dst_rect.h = 16;
for (i = 0; i < tiles; i++) {
enable_mdp_irq(mdp, DL0_ROI_DONE);
ret = mdp_ppp_blit(mdp, req, src_file, src_start,
src_len, dst_file, dst_start,
dst_len);
if (ret)
goto err_bad_blit;
ret = mdp_ppp_wait(mdp);
if (ret)
goto err_wait_failed;
req->dst_rect.y += 16;
req->src_rect.x += req->src_rect.w;
}
if (!remainder)
goto end;
req->src_rect.w = remainder*req->src_rect.w / req->dst_rect.h;
req->dst_rect.h = remainder;
}
enable_mdp_irq(mdp, DL0_ROI_DONE);
ret = mdp_ppp_blit(mdp, req, src_file, src_start, src_len, dst_file,
dst_start,
dst_len);
if (ret)
goto err_bad_blit;
ret = mdp_ppp_wait(mdp);
if (ret)
goto err_wait_failed;
end:
put_img(src_file, dst_file);
mutex_unlock(&mdp_mutex);
return 0;
err_bad_blit:
disable_mdp_irq(mdp, DL0_ROI_DONE);
err_wait_failed:
put_img(src_file, dst_file);
mutex_unlock(&mdp_mutex);
return ret;
}
void mdp_set_grp_disp(struct mdp_device *mdp_dev, unsigned disp_id)
{
struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
disp_id &= 0xf;
mdp_writel(mdp, disp_id, MDP_FULL_BYPASS_WORD43);
}
int register_mdp_client(struct class_interface *cint)
{
if (!mdp_class) {
pr_err("mdp: no mdp_class when registering mdp client\n");
return -ENODEV;
}
cint->class = mdp_class;
return class_interface_register(cint);
}
#include "mdp_csc_table.h"
#include "mdp_scale_tables.h"
int mdp_probe(struct platform_device *pdev)
{
struct resource *resource;
int ret;
int n;
struct mdp_info *mdp;
resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!resource) {
pr_err("mdp: can not get mdp mem resource!\n");
return -ENOMEM;
}
mdp = kzalloc(sizeof(struct mdp_info), GFP_KERNEL);
if (!mdp)
return -ENOMEM;
mdp->irq = platform_get_irq(pdev, 0);
if (mdp->irq < 0) {
pr_err("mdp: can not get mdp irq\n");
ret = mdp->irq;
goto error_get_irq;
}
mdp->base = ioremap(resource->start,
resource->end - resource->start);
if (mdp->base == 0) {
printk(KERN_ERR "msmfb: cannot allocate mdp regs!\n");
ret = -ENOMEM;
goto error_ioremap;
}
mdp->mdp_dev.dma = mdp_dma;
mdp->mdp_dev.dma_wait = mdp_dma_wait;
mdp->mdp_dev.blit = mdp_blit;
mdp->mdp_dev.set_grp_disp = mdp_set_grp_disp;
clk = clk_get(&pdev->dev, "mdp_clk");
if (IS_ERR(clk)) {
printk(KERN_INFO "mdp: failed to get mdp clk");
return PTR_ERR(clk);
}
ret = request_irq(mdp->irq, mdp_isr, IRQF_DISABLED, "msm_mdp", mdp);
if (ret)
goto error_request_irq;
disable_irq(mdp->irq);
mdp_irq_mask = 0;
/* debug interface write access */
mdp_writel(mdp, 1, 0x60);
mdp_writel(mdp, MDP_ANY_INTR_MASK, MDP_INTR_ENABLE);
mdp_writel(mdp, 1, MDP_EBI2_PORTMAP_MODE);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01f8);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01fc);
for (n = 0; n < ARRAY_SIZE(csc_table); n++)
mdp_writel(mdp, csc_table[n].val, csc_table[n].reg);
/* clear up unused fg/main registers */
/* comp.plane 2&3 ystride */
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0120);
/* unpacked pattern */
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x012c);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0130);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0134);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0158);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x015c);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0160);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0170);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0174);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x017c);
/* comp.plane 2 & 3 */
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0114);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0118);
/* clear unused bg registers */
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01c8);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01d0);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01dc);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e0);
mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e4);
for (n = 0; n < ARRAY_SIZE(mdp_upscale_table); n++)
mdp_writel(mdp, mdp_upscale_table[n].val,
mdp_upscale_table[n].reg);
for (n = 0; n < 9; n++)
mdp_writel(mdp, mdp_default_ccs[n], 0x40440 + 4 * n);
mdp_writel(mdp, mdp_default_ccs[9], 0x40500 + 4 * 0);
mdp_writel(mdp, mdp_default_ccs[10], 0x40500 + 4 * 0);
mdp_writel(mdp, mdp_default_ccs[11], 0x40500 + 4 * 0);
/* register mdp device */
mdp->mdp_dev.dev.parent = &pdev->dev;
mdp->mdp_dev.dev.class = mdp_class;
/* if you can remove the platform device you'd have to implement
* this:
mdp_dev.release = mdp_class; */
ret = device_register(&mdp->mdp_dev.dev);
if (ret)
goto error_device_register;
return 0;
error_device_register:
free_irq(mdp->irq, mdp);
error_request_irq:
iounmap(mdp->base);
error_get_irq:
error_ioremap:
kfree(mdp);
return ret;
}
static struct platform_driver msm_mdp_driver = {
.probe = mdp_probe,
.driver = {.name = "msm_mdp"},
};
static int __init mdp_init(void)
{
mdp_class = class_create(THIS_MODULE, "msm_mdp");
if (IS_ERR(mdp_class)) {
printk(KERN_ERR "Error creating mdp class\n");
return PTR_ERR(mdp_class);
}
return platform_driver_register(&msm_mdp_driver);
}
subsys_initcall(mdp_init);