28f65c11f2
Several fixes as well where the +1 was missing. Done via coccinelle scripts like: @@ struct resource *ptr; @@ - ptr->end - ptr->start + 1 + resource_size(ptr) and some grep and typing. Mostly uncompiled, no cross-compilers. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
639 lines
17 KiB
C
639 lines
17 KiB
C
/* drivers/video/msm/msm_fb.c
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*
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* Core MSM framebuffer driver.
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*
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* Copyright (C) 2007 Google Incorporated
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/fb.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/freezer.h>
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#include <linux/wait.h>
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#include <linux/msm_mdp.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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#include <mach/msm_fb.h>
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#include <mach/board.h>
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#include <linux/workqueue.h>
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#include <linux/clk.h>
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#include <linux/debugfs.h>
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#include <linux/dma-mapping.h>
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#define PRINT_FPS 0
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#define PRINT_BLIT_TIME 0
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#define SLEEPING 0x4
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#define UPDATING 0x3
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#define FULL_UPDATE_DONE 0x2
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#define WAKING 0x1
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#define AWAKE 0x0
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#define NONE 0
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#define SUSPEND_RESUME 0x1
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#define FPS 0x2
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#define BLIT_TIME 0x4
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#define SHOW_UPDATES 0x8
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#define DLOG(mask, fmt, args...) \
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do { \
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if (msmfb_debug_mask & mask) \
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printk(KERN_INFO "msmfb: "fmt, ##args); \
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} while (0)
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static int msmfb_debug_mask;
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module_param_named(msmfb_debug_mask, msmfb_debug_mask, int,
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S_IRUGO | S_IWUSR | S_IWGRP);
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struct mdp_device *mdp;
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struct msmfb_info {
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struct fb_info *fb;
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struct msm_panel_data *panel;
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int xres;
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int yres;
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unsigned output_format;
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unsigned yoffset;
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unsigned frame_requested;
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unsigned frame_done;
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int sleeping;
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unsigned update_frame;
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struct {
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int left;
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int top;
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int eright; /* exclusive */
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int ebottom; /* exclusive */
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} update_info;
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char *black;
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spinlock_t update_lock;
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struct mutex panel_init_lock;
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wait_queue_head_t frame_wq;
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struct work_struct resume_work;
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struct msmfb_callback dma_callback;
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struct msmfb_callback vsync_callback;
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struct hrtimer fake_vsync;
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ktime_t vsync_request_time;
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};
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static int msmfb_open(struct fb_info *info, int user)
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{
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return 0;
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}
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static int msmfb_release(struct fb_info *info, int user)
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{
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return 0;
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}
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/* Called from dma interrupt handler, must not sleep */
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static void msmfb_handle_dma_interrupt(struct msmfb_callback *callback)
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{
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unsigned long irq_flags;
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struct msmfb_info *msmfb = container_of(callback, struct msmfb_info,
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dma_callback);
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spin_lock_irqsave(&msmfb->update_lock, irq_flags);
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msmfb->frame_done = msmfb->frame_requested;
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if (msmfb->sleeping == UPDATING &&
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msmfb->frame_done == msmfb->update_frame) {
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DLOG(SUSPEND_RESUME, "full update completed\n");
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schedule_work(&msmfb->resume_work);
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}
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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wake_up(&msmfb->frame_wq);
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}
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static int msmfb_start_dma(struct msmfb_info *msmfb)
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{
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uint32_t x, y, w, h;
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unsigned addr;
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unsigned long irq_flags;
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uint32_t yoffset;
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s64 time_since_request;
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struct msm_panel_data *panel = msmfb->panel;
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spin_lock_irqsave(&msmfb->update_lock, irq_flags);
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time_since_request = ktime_to_ns(ktime_sub(ktime_get(),
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msmfb->vsync_request_time));
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if (time_since_request > 20 * NSEC_PER_MSEC) {
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uint32_t us;
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us = do_div(time_since_request, NSEC_PER_MSEC) / NSEC_PER_USEC;
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printk(KERN_WARNING "msmfb_start_dma %lld.%03u ms after vsync "
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"request\n", time_since_request, us);
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}
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if (msmfb->frame_done == msmfb->frame_requested) {
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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return -1;
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}
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if (msmfb->sleeping == SLEEPING) {
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DLOG(SUSPEND_RESUME, "tried to start dma while asleep\n");
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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return -1;
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}
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x = msmfb->update_info.left;
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y = msmfb->update_info.top;
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w = msmfb->update_info.eright - x;
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h = msmfb->update_info.ebottom - y;
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yoffset = msmfb->yoffset;
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msmfb->update_info.left = msmfb->xres + 1;
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msmfb->update_info.top = msmfb->yres + 1;
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msmfb->update_info.eright = 0;
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msmfb->update_info.ebottom = 0;
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if (unlikely(w > msmfb->xres || h > msmfb->yres ||
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w == 0 || h == 0)) {
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printk(KERN_INFO "invalid update: %d %d %d "
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"%d\n", x, y, w, h);
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msmfb->frame_done = msmfb->frame_requested;
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goto error;
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}
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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addr = ((msmfb->xres * (yoffset + y) + x) * 2);
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mdp->dma(mdp, addr + msmfb->fb->fix.smem_start,
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msmfb->xres * 2, w, h, x, y, &msmfb->dma_callback,
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panel->interface_type);
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return 0;
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error:
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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/* some clients need to clear their vsync interrupt */
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if (panel->clear_vsync)
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panel->clear_vsync(panel);
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wake_up(&msmfb->frame_wq);
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return 0;
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}
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/* Called from esync interrupt handler, must not sleep */
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static void msmfb_handle_vsync_interrupt(struct msmfb_callback *callback)
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{
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struct msmfb_info *msmfb = container_of(callback, struct msmfb_info,
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vsync_callback);
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msmfb_start_dma(msmfb);
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}
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static enum hrtimer_restart msmfb_fake_vsync(struct hrtimer *timer)
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{
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struct msmfb_info *msmfb = container_of(timer, struct msmfb_info,
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fake_vsync);
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msmfb_start_dma(msmfb);
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return HRTIMER_NORESTART;
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}
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static void msmfb_pan_update(struct fb_info *info, uint32_t left, uint32_t top,
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uint32_t eright, uint32_t ebottom,
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uint32_t yoffset, int pan_display)
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{
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struct msmfb_info *msmfb = info->par;
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struct msm_panel_data *panel = msmfb->panel;
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unsigned long irq_flags;
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int sleeping;
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int retry = 1;
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DLOG(SHOW_UPDATES, "update %d %d %d %d %d %d\n",
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left, top, eright, ebottom, yoffset, pan_display);
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restart:
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spin_lock_irqsave(&msmfb->update_lock, irq_flags);
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/* if we are sleeping, on a pan_display wait 10ms (to throttle back
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* drawing otherwise return */
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if (msmfb->sleeping == SLEEPING) {
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DLOG(SUSPEND_RESUME, "drawing while asleep\n");
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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if (pan_display)
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wait_event_interruptible_timeout(msmfb->frame_wq,
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msmfb->sleeping != SLEEPING, HZ/10);
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return;
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}
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sleeping = msmfb->sleeping;
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/* on a full update, if the last frame has not completed, wait for it */
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if ((pan_display && msmfb->frame_requested != msmfb->frame_done) ||
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sleeping == UPDATING) {
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int ret;
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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ret = wait_event_interruptible_timeout(msmfb->frame_wq,
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msmfb->frame_done == msmfb->frame_requested &&
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msmfb->sleeping != UPDATING, 5 * HZ);
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if (ret <= 0 && (msmfb->frame_requested != msmfb->frame_done ||
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msmfb->sleeping == UPDATING)) {
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if (retry && panel->request_vsync &&
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(sleeping == AWAKE)) {
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panel->request_vsync(panel,
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&msmfb->vsync_callback);
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retry = 0;
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printk(KERN_WARNING "msmfb_pan_display timeout "
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"rerequest vsync\n");
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} else {
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printk(KERN_WARNING "msmfb_pan_display timeout "
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"waiting for frame start, %d %d\n",
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msmfb->frame_requested,
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msmfb->frame_done);
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return;
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}
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}
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goto restart;
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}
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msmfb->frame_requested++;
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/* if necessary, update the y offset, if this is the
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* first full update on resume, set the sleeping state */
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if (pan_display) {
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msmfb->yoffset = yoffset;
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if (left == 0 && top == 0 && eright == info->var.xres &&
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ebottom == info->var.yres) {
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if (sleeping == WAKING) {
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msmfb->update_frame = msmfb->frame_requested;
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DLOG(SUSPEND_RESUME, "full update starting\n");
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msmfb->sleeping = UPDATING;
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}
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}
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}
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/* set the update request */
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if (left < msmfb->update_info.left)
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msmfb->update_info.left = left;
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if (top < msmfb->update_info.top)
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msmfb->update_info.top = top;
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if (eright > msmfb->update_info.eright)
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msmfb->update_info.eright = eright;
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if (ebottom > msmfb->update_info.ebottom)
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msmfb->update_info.ebottom = ebottom;
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DLOG(SHOW_UPDATES, "update queued %d %d %d %d %d\n",
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msmfb->update_info.left, msmfb->update_info.top,
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msmfb->update_info.eright, msmfb->update_info.ebottom,
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msmfb->yoffset);
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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/* if the panel is all the way on wait for vsync, otherwise sleep
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* for 16 ms (long enough for the dma to panel) and then begin dma */
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msmfb->vsync_request_time = ktime_get();
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if (panel->request_vsync && (sleeping == AWAKE)) {
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panel->request_vsync(panel, &msmfb->vsync_callback);
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} else {
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if (!hrtimer_active(&msmfb->fake_vsync)) {
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hrtimer_start(&msmfb->fake_vsync,
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ktime_set(0, NSEC_PER_SEC/60),
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HRTIMER_MODE_REL);
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}
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}
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}
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static void msmfb_update(struct fb_info *info, uint32_t left, uint32_t top,
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uint32_t eright, uint32_t ebottom)
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{
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msmfb_pan_update(info, left, top, eright, ebottom, 0, 0);
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}
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static void power_on_panel(struct work_struct *work)
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{
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struct msmfb_info *msmfb =
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container_of(work, struct msmfb_info, resume_work);
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struct msm_panel_data *panel = msmfb->panel;
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unsigned long irq_flags;
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mutex_lock(&msmfb->panel_init_lock);
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DLOG(SUSPEND_RESUME, "turning on panel\n");
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if (msmfb->sleeping == UPDATING) {
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if (panel->unblank(panel)) {
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printk(KERN_INFO "msmfb: panel unblank failed,"
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"not starting drawing\n");
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goto error;
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}
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spin_lock_irqsave(&msmfb->update_lock, irq_flags);
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msmfb->sleeping = AWAKE;
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wake_up(&msmfb->frame_wq);
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spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
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}
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error:
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mutex_unlock(&msmfb->panel_init_lock);
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}
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static int msmfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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if ((var->xres != info->var.xres) ||
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(var->yres != info->var.yres) ||
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(var->xres_virtual != info->var.xres_virtual) ||
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(var->yres_virtual != info->var.yres_virtual) ||
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(var->xoffset != info->var.xoffset) ||
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(var->bits_per_pixel != info->var.bits_per_pixel) ||
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(var->grayscale != info->var.grayscale))
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return -EINVAL;
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return 0;
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}
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int msmfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct msmfb_info *msmfb = info->par;
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struct msm_panel_data *panel = msmfb->panel;
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/* "UPDT" */
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if ((panel->caps & MSMFB_CAP_PARTIAL_UPDATES) &&
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(var->reserved[0] == 0x54445055)) {
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msmfb_pan_update(info, var->reserved[1] & 0xffff,
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var->reserved[1] >> 16,
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var->reserved[2] & 0xffff,
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var->reserved[2] >> 16, var->yoffset, 1);
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} else {
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msmfb_pan_update(info, 0, 0, info->var.xres, info->var.yres,
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var->yoffset, 1);
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}
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return 0;
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}
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static void msmfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
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{
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cfb_fillrect(p, rect);
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msmfb_update(p, rect->dx, rect->dy, rect->dx + rect->width,
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rect->dy + rect->height);
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}
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static void msmfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
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{
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cfb_copyarea(p, area);
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msmfb_update(p, area->dx, area->dy, area->dx + area->width,
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area->dy + area->height);
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}
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static void msmfb_imageblit(struct fb_info *p, const struct fb_image *image)
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{
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cfb_imageblit(p, image);
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msmfb_update(p, image->dx, image->dy, image->dx + image->width,
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image->dy + image->height);
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}
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static int msmfb_blit(struct fb_info *info,
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void __user *p)
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{
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struct mdp_blit_req req;
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struct mdp_blit_req_list req_list;
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int i;
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int ret;
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if (copy_from_user(&req_list, p, sizeof(req_list)))
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return -EFAULT;
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for (i = 0; i < req_list.count; i++) {
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struct mdp_blit_req_list *list =
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(struct mdp_blit_req_list *)p;
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if (copy_from_user(&req, &list->req[i], sizeof(req)))
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return -EFAULT;
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ret = mdp->blit(mdp, info, &req);
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if (ret)
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return ret;
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}
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return 0;
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}
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DEFINE_MUTEX(mdp_ppp_lock);
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static int msmfb_ioctl(struct fb_info *p, unsigned int cmd, unsigned long arg)
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{
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void __user *argp = (void __user *)arg;
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int ret;
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switch (cmd) {
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case MSMFB_GRP_DISP:
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mdp->set_grp_disp(mdp, arg);
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break;
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case MSMFB_BLIT:
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ret = msmfb_blit(p, argp);
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if (ret)
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return ret;
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break;
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default:
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printk(KERN_INFO "msmfb unknown ioctl: %d\n", cmd);
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return -EINVAL;
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}
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return 0;
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}
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static struct fb_ops msmfb_ops = {
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.owner = THIS_MODULE,
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.fb_open = msmfb_open,
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.fb_release = msmfb_release,
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.fb_check_var = msmfb_check_var,
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.fb_pan_display = msmfb_pan_display,
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.fb_fillrect = msmfb_fillrect,
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.fb_copyarea = msmfb_copyarea,
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.fb_imageblit = msmfb_imageblit,
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.fb_ioctl = msmfb_ioctl,
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};
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static unsigned PP[16];
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#define BITS_PER_PIXEL 16
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static void setup_fb_info(struct msmfb_info *msmfb)
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{
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struct fb_info *fb_info = msmfb->fb;
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int r;
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/* finish setting up the fb_info struct */
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strncpy(fb_info->fix.id, "msmfb", 16);
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fb_info->fix.ypanstep = 1;
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fb_info->fbops = &msmfb_ops;
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fb_info->flags = FBINFO_DEFAULT;
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fb_info->fix.type = FB_TYPE_PACKED_PIXELS;
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fb_info->fix.visual = FB_VISUAL_TRUECOLOR;
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fb_info->fix.line_length = msmfb->xres * 2;
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fb_info->var.xres = msmfb->xres;
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fb_info->var.yres = msmfb->yres;
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fb_info->var.width = msmfb->panel->fb_data->width;
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fb_info->var.height = msmfb->panel->fb_data->height;
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fb_info->var.xres_virtual = msmfb->xres;
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fb_info->var.yres_virtual = msmfb->yres * 2;
|
|
fb_info->var.bits_per_pixel = BITS_PER_PIXEL;
|
|
fb_info->var.accel_flags = 0;
|
|
|
|
fb_info->var.yoffset = 0;
|
|
|
|
if (msmfb->panel->caps & MSMFB_CAP_PARTIAL_UPDATES) {
|
|
/*
|
|
* Set the param in the fixed screen, so userspace can't
|
|
* change it. This will be used to check for the
|
|
* capability.
|
|
*/
|
|
fb_info->fix.reserved[0] = 0x5444;
|
|
fb_info->fix.reserved[1] = 0x5055;
|
|
|
|
/*
|
|
* This preloads the value so that if userspace doesn't
|
|
* change it, it will be a full update
|
|
*/
|
|
fb_info->var.reserved[0] = 0x54445055;
|
|
fb_info->var.reserved[1] = 0;
|
|
fb_info->var.reserved[2] = (uint16_t)msmfb->xres |
|
|
((uint32_t)msmfb->yres << 16);
|
|
}
|
|
|
|
fb_info->var.red.offset = 11;
|
|
fb_info->var.red.length = 5;
|
|
fb_info->var.red.msb_right = 0;
|
|
fb_info->var.green.offset = 5;
|
|
fb_info->var.green.length = 6;
|
|
fb_info->var.green.msb_right = 0;
|
|
fb_info->var.blue.offset = 0;
|
|
fb_info->var.blue.length = 5;
|
|
fb_info->var.blue.msb_right = 0;
|
|
|
|
r = fb_alloc_cmap(&fb_info->cmap, 16, 0);
|
|
fb_info->pseudo_palette = PP;
|
|
|
|
PP[0] = 0;
|
|
for (r = 1; r < 16; r++)
|
|
PP[r] = 0xffffffff;
|
|
}
|
|
|
|
static int setup_fbmem(struct msmfb_info *msmfb, struct platform_device *pdev)
|
|
{
|
|
struct fb_info *fb = msmfb->fb;
|
|
struct resource *resource;
|
|
unsigned long size = msmfb->xres * msmfb->yres *
|
|
(BITS_PER_PIXEL >> 3) * 2;
|
|
unsigned char *fbram;
|
|
|
|
/* board file might have attached a resource describing an fb */
|
|
resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!resource)
|
|
return -EINVAL;
|
|
|
|
/* check the resource is large enough to fit the fb */
|
|
if (resource->end - resource->start < size) {
|
|
printk(KERN_ERR "allocated resource is too small for "
|
|
"fb\n");
|
|
return -ENOMEM;
|
|
}
|
|
fb->fix.smem_start = resource->start;
|
|
fb->fix.smem_len = resource_size(resource);
|
|
fbram = ioremap(resource->start, resource_size(resource));
|
|
if (fbram == NULL) {
|
|
printk(KERN_ERR "msmfb: cannot allocate fbram!\n");
|
|
return -ENOMEM;
|
|
}
|
|
fb->screen_base = fbram;
|
|
return 0;
|
|
}
|
|
|
|
static int msmfb_probe(struct platform_device *pdev)
|
|
{
|
|
struct fb_info *fb;
|
|
struct msmfb_info *msmfb;
|
|
struct msm_panel_data *panel = pdev->dev.platform_data;
|
|
int ret;
|
|
|
|
if (!panel) {
|
|
pr_err("msmfb_probe: no platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
if (!panel->fb_data) {
|
|
pr_err("msmfb_probe: no fb_data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
fb = framebuffer_alloc(sizeof(struct msmfb_info), &pdev->dev);
|
|
if (!fb)
|
|
return -ENOMEM;
|
|
msmfb = fb->par;
|
|
msmfb->fb = fb;
|
|
msmfb->panel = panel;
|
|
msmfb->xres = panel->fb_data->xres;
|
|
msmfb->yres = panel->fb_data->yres;
|
|
|
|
ret = setup_fbmem(msmfb, pdev);
|
|
if (ret)
|
|
goto error_setup_fbmem;
|
|
|
|
setup_fb_info(msmfb);
|
|
|
|
spin_lock_init(&msmfb->update_lock);
|
|
mutex_init(&msmfb->panel_init_lock);
|
|
init_waitqueue_head(&msmfb->frame_wq);
|
|
INIT_WORK(&msmfb->resume_work, power_on_panel);
|
|
msmfb->black = kzalloc(msmfb->fb->var.bits_per_pixel*msmfb->xres,
|
|
GFP_KERNEL);
|
|
|
|
printk(KERN_INFO "msmfb_probe() installing %d x %d panel\n",
|
|
msmfb->xres, msmfb->yres);
|
|
|
|
msmfb->dma_callback.func = msmfb_handle_dma_interrupt;
|
|
msmfb->vsync_callback.func = msmfb_handle_vsync_interrupt;
|
|
hrtimer_init(&msmfb->fake_vsync, CLOCK_MONOTONIC,
|
|
HRTIMER_MODE_REL);
|
|
|
|
|
|
msmfb->fake_vsync.function = msmfb_fake_vsync;
|
|
|
|
ret = register_framebuffer(fb);
|
|
if (ret)
|
|
goto error_register_framebuffer;
|
|
|
|
msmfb->sleeping = WAKING;
|
|
|
|
return 0;
|
|
|
|
error_register_framebuffer:
|
|
iounmap(fb->screen_base);
|
|
error_setup_fbmem:
|
|
framebuffer_release(msmfb->fb);
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver msm_panel_driver = {
|
|
/* need to write remove */
|
|
.probe = msmfb_probe,
|
|
.driver = {.name = "msm_panel"},
|
|
};
|
|
|
|
|
|
static int msmfb_add_mdp_device(struct device *dev,
|
|
struct class_interface *class_intf)
|
|
{
|
|
/* might need locking if mulitple mdp devices */
|
|
if (mdp)
|
|
return 0;
|
|
mdp = container_of(dev, struct mdp_device, dev);
|
|
return platform_driver_register(&msm_panel_driver);
|
|
}
|
|
|
|
static void msmfb_remove_mdp_device(struct device *dev,
|
|
struct class_interface *class_intf)
|
|
{
|
|
/* might need locking if mulitple mdp devices */
|
|
if (dev != &mdp->dev)
|
|
return;
|
|
platform_driver_unregister(&msm_panel_driver);
|
|
mdp = NULL;
|
|
}
|
|
|
|
static struct class_interface msm_fb_interface = {
|
|
.add_dev = &msmfb_add_mdp_device,
|
|
.remove_dev = &msmfb_remove_mdp_device,
|
|
};
|
|
|
|
static int __init msmfb_init(void)
|
|
{
|
|
return register_mdp_client(&msm_fb_interface);
|
|
}
|
|
|
|
module_init(msmfb_init);
|