+++ /dev/null
-/* drivers/video/msm/msm_fb.c
- *
- * Core MSM framebuffer driver.
- *
- * 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/platform_device.h>
-#include <linux/module.h>
-#include <linux/fb.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-
-#include <linux/freezer.h>
-#include <linux/wait.h>
-#include <linux/msm_mdp.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-#include <linux/platform_data/video-msm_fb.h>
-#include <linux/workqueue.h>
-#include <linux/clk.h>
-#include <linux/debugfs.h>
-#include <linux/dma-mapping.h>
-
-#define PRINT_FPS 0
-#define PRINT_BLIT_TIME 0
-
-#define SLEEPING 0x4
-#define UPDATING 0x3
-#define FULL_UPDATE_DONE 0x2
-#define WAKING 0x1
-#define AWAKE 0x0
-
-#define NONE 0
-#define SUSPEND_RESUME 0x1
-#define FPS 0x2
-#define BLIT_TIME 0x4
-#define SHOW_UPDATES 0x8
-
-#define DLOG(mask, fmt, args...) \
-do { \
- if (msmfb_debug_mask & mask) \
- printk(KERN_INFO "msmfb: "fmt, ##args); \
-} while (0)
-
-static int msmfb_debug_mask;
-module_param_named(msmfb_debug_mask, msmfb_debug_mask, int,
- S_IRUGO | S_IWUSR | S_IWGRP);
-
-struct mdp_device *mdp;
-
-struct msmfb_info {
- struct fb_info *fb;
- struct msm_panel_data *panel;
- int xres;
- int yres;
- unsigned output_format;
- unsigned yoffset;
- unsigned frame_requested;
- unsigned frame_done;
- int sleeping;
- unsigned update_frame;
- struct {
- int left;
- int top;
- int eright; /* exclusive */
- int ebottom; /* exclusive */
- } update_info;
- char *black;
-
- spinlock_t update_lock;
- struct mutex panel_init_lock;
- wait_queue_head_t frame_wq;
- struct work_struct resume_work;
- struct msmfb_callback dma_callback;
- struct msmfb_callback vsync_callback;
- struct hrtimer fake_vsync;
- ktime_t vsync_request_time;
-};
-
-static int msmfb_open(struct fb_info *info, int user)
-{
- return 0;
-}
-
-static int msmfb_release(struct fb_info *info, int user)
-{
- return 0;
-}
-
-/* Called from dma interrupt handler, must not sleep */
-static void msmfb_handle_dma_interrupt(struct msmfb_callback *callback)
-{
- unsigned long irq_flags;
- struct msmfb_info *msmfb = container_of(callback, struct msmfb_info,
- dma_callback);
-
- spin_lock_irqsave(&msmfb->update_lock, irq_flags);
- msmfb->frame_done = msmfb->frame_requested;
- if (msmfb->sleeping == UPDATING &&
- msmfb->frame_done == msmfb->update_frame) {
- DLOG(SUSPEND_RESUME, "full update completed\n");
- schedule_work(&msmfb->resume_work);
- }
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- wake_up(&msmfb->frame_wq);
-}
-
-static int msmfb_start_dma(struct msmfb_info *msmfb)
-{
- uint32_t x, y, w, h;
- unsigned addr;
- unsigned long irq_flags;
- uint32_t yoffset;
- s64 time_since_request;
- struct msm_panel_data *panel = msmfb->panel;
-
- spin_lock_irqsave(&msmfb->update_lock, irq_flags);
- time_since_request = ktime_to_ns(ktime_sub(ktime_get(),
- msmfb->vsync_request_time));
- if (time_since_request > 20 * NSEC_PER_MSEC) {
- uint32_t us;
- us = do_div(time_since_request, NSEC_PER_MSEC) / NSEC_PER_USEC;
- printk(KERN_WARNING "msmfb_start_dma %lld.%03u ms after vsync "
- "request\n", time_since_request, us);
- }
- if (msmfb->frame_done == msmfb->frame_requested) {
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- return -1;
- }
- if (msmfb->sleeping == SLEEPING) {
- DLOG(SUSPEND_RESUME, "tried to start dma while asleep\n");
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- return -1;
- }
- x = msmfb->update_info.left;
- y = msmfb->update_info.top;
- w = msmfb->update_info.eright - x;
- h = msmfb->update_info.ebottom - y;
- yoffset = msmfb->yoffset;
- msmfb->update_info.left = msmfb->xres + 1;
- msmfb->update_info.top = msmfb->yres + 1;
- msmfb->update_info.eright = 0;
- msmfb->update_info.ebottom = 0;
- if (unlikely(w > msmfb->xres || h > msmfb->yres ||
- w == 0 || h == 0)) {
- printk(KERN_INFO "invalid update: %d %d %d "
- "%d\n", x, y, w, h);
- msmfb->frame_done = msmfb->frame_requested;
- goto error;
- }
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
-
- addr = ((msmfb->xres * (yoffset + y) + x) * 2);
- mdp->dma(mdp, addr + msmfb->fb->fix.smem_start,
- msmfb->xres * 2, w, h, x, y, &msmfb->dma_callback,
- panel->interface_type);
- return 0;
-error:
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- /* some clients need to clear their vsync interrupt */
- if (panel->clear_vsync)
- panel->clear_vsync(panel);
- wake_up(&msmfb->frame_wq);
- return 0;
-}
-
-/* Called from esync interrupt handler, must not sleep */
-static void msmfb_handle_vsync_interrupt(struct msmfb_callback *callback)
-{
- struct msmfb_info *msmfb = container_of(callback, struct msmfb_info,
- vsync_callback);
- msmfb_start_dma(msmfb);
-}
-
-static enum hrtimer_restart msmfb_fake_vsync(struct hrtimer *timer)
-{
- struct msmfb_info *msmfb = container_of(timer, struct msmfb_info,
- fake_vsync);
- msmfb_start_dma(msmfb);
- return HRTIMER_NORESTART;
-}
-
-static void msmfb_pan_update(struct fb_info *info, uint32_t left, uint32_t top,
- uint32_t eright, uint32_t ebottom,
- uint32_t yoffset, int pan_display)
-{
- struct msmfb_info *msmfb = info->par;
- struct msm_panel_data *panel = msmfb->panel;
- unsigned long irq_flags;
- int sleeping;
- int retry = 1;
-
- DLOG(SHOW_UPDATES, "update %d %d %d %d %d %d\n",
- left, top, eright, ebottom, yoffset, pan_display);
-restart:
- spin_lock_irqsave(&msmfb->update_lock, irq_flags);
-
- /* if we are sleeping, on a pan_display wait 10ms (to throttle back
- * drawing otherwise return */
- if (msmfb->sleeping == SLEEPING) {
- DLOG(SUSPEND_RESUME, "drawing while asleep\n");
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- if (pan_display)
- wait_event_interruptible_timeout(msmfb->frame_wq,
- msmfb->sleeping != SLEEPING, HZ/10);
- return;
- }
-
- sleeping = msmfb->sleeping;
- /* on a full update, if the last frame has not completed, wait for it */
- if ((pan_display && msmfb->frame_requested != msmfb->frame_done) ||
- sleeping == UPDATING) {
- int ret;
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- ret = wait_event_interruptible_timeout(msmfb->frame_wq,
- msmfb->frame_done == msmfb->frame_requested &&
- msmfb->sleeping != UPDATING, 5 * HZ);
- if (ret <= 0 && (msmfb->frame_requested != msmfb->frame_done ||
- msmfb->sleeping == UPDATING)) {
- if (retry && panel->request_vsync &&
- (sleeping == AWAKE)) {
- panel->request_vsync(panel,
- &msmfb->vsync_callback);
- retry = 0;
- printk(KERN_WARNING "msmfb_pan_display timeout "
- "rerequest vsync\n");
- } else {
- printk(KERN_WARNING "msmfb_pan_display timeout "
- "waiting for frame start, %d %d\n",
- msmfb->frame_requested,
- msmfb->frame_done);
- return;
- }
- }
- goto restart;
- }
-
-
- msmfb->frame_requested++;
- /* if necessary, update the y offset, if this is the
- * first full update on resume, set the sleeping state */
- if (pan_display) {
- msmfb->yoffset = yoffset;
- if (left == 0 && top == 0 && eright == info->var.xres &&
- ebottom == info->var.yres) {
- if (sleeping == WAKING) {
- msmfb->update_frame = msmfb->frame_requested;
- DLOG(SUSPEND_RESUME, "full update starting\n");
- msmfb->sleeping = UPDATING;
- }
- }
- }
-
- /* set the update request */
- if (left < msmfb->update_info.left)
- msmfb->update_info.left = left;
- if (top < msmfb->update_info.top)
- msmfb->update_info.top = top;
- if (eright > msmfb->update_info.eright)
- msmfb->update_info.eright = eright;
- if (ebottom > msmfb->update_info.ebottom)
- msmfb->update_info.ebottom = ebottom;
- DLOG(SHOW_UPDATES, "update queued %d %d %d %d %d\n",
- msmfb->update_info.left, msmfb->update_info.top,
- msmfb->update_info.eright, msmfb->update_info.ebottom,
- msmfb->yoffset);
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
-
- /* if the panel is all the way on wait for vsync, otherwise sleep
- * for 16 ms (long enough for the dma to panel) and then begin dma */
- msmfb->vsync_request_time = ktime_get();
- if (panel->request_vsync && (sleeping == AWAKE)) {
- panel->request_vsync(panel, &msmfb->vsync_callback);
- } else {
- if (!hrtimer_active(&msmfb->fake_vsync)) {
- hrtimer_start(&msmfb->fake_vsync,
- ktime_set(0, NSEC_PER_SEC/60),
- HRTIMER_MODE_REL);
- }
- }
-}
-
-static void msmfb_update(struct fb_info *info, uint32_t left, uint32_t top,
- uint32_t eright, uint32_t ebottom)
-{
- msmfb_pan_update(info, left, top, eright, ebottom, 0, 0);
-}
-
-static void power_on_panel(struct work_struct *work)
-{
- struct msmfb_info *msmfb =
- container_of(work, struct msmfb_info, resume_work);
- struct msm_panel_data *panel = msmfb->panel;
- unsigned long irq_flags;
-
- mutex_lock(&msmfb->panel_init_lock);
- DLOG(SUSPEND_RESUME, "turning on panel\n");
- if (msmfb->sleeping == UPDATING) {
- if (panel->unblank(panel)) {
- printk(KERN_INFO "msmfb: panel unblank failed,"
- "not starting drawing\n");
- goto error;
- }
- spin_lock_irqsave(&msmfb->update_lock, irq_flags);
- msmfb->sleeping = AWAKE;
- wake_up(&msmfb->frame_wq);
- spin_unlock_irqrestore(&msmfb->update_lock, irq_flags);
- }
-error:
- mutex_unlock(&msmfb->panel_init_lock);
-}
-
-
-static int msmfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
-{
- if ((var->xres != info->var.xres) ||
- (var->yres != info->var.yres) ||
- (var->xres_virtual != info->var.xres_virtual) ||
- (var->yres_virtual != info->var.yres_virtual) ||
- (var->xoffset != info->var.xoffset) ||
- (var->bits_per_pixel != info->var.bits_per_pixel) ||
- (var->grayscale != info->var.grayscale))
- return -EINVAL;
- return 0;
-}
-
-int msmfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
-{
- struct msmfb_info *msmfb = info->par;
- struct msm_panel_data *panel = msmfb->panel;
-
- /* "UPDT" */
- if ((panel->caps & MSMFB_CAP_PARTIAL_UPDATES) &&
- (var->reserved[0] == 0x54445055)) {
- msmfb_pan_update(info, var->reserved[1] & 0xffff,
- var->reserved[1] >> 16,
- var->reserved[2] & 0xffff,
- var->reserved[2] >> 16, var->yoffset, 1);
- } else {
- msmfb_pan_update(info, 0, 0, info->var.xres, info->var.yres,
- var->yoffset, 1);
- }
- return 0;
-}
-
-static void msmfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
-{
- cfb_fillrect(p, rect);
- msmfb_update(p, rect->dx, rect->dy, rect->dx + rect->width,
- rect->dy + rect->height);
-}
-
-static void msmfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
-{
- cfb_copyarea(p, area);
- msmfb_update(p, area->dx, area->dy, area->dx + area->width,
- area->dy + area->height);
-}
-
-static void msmfb_imageblit(struct fb_info *p, const struct fb_image *image)
-{
- cfb_imageblit(p, image);
- msmfb_update(p, image->dx, image->dy, image->dx + image->width,
- image->dy + image->height);
-}
-
-
-static int msmfb_blit(struct fb_info *info,
- void __user *p)
-{
- struct mdp_blit_req req;
- struct mdp_blit_req_list req_list;
- int i;
- int ret;
-
- if (copy_from_user(&req_list, p, sizeof(req_list)))
- return -EFAULT;
-
- for (i = 0; i < req_list.count; i++) {
- struct mdp_blit_req_list *list =
- (struct mdp_blit_req_list *)p;
- if (copy_from_user(&req, &list->req[i], sizeof(req)))
- return -EFAULT;
- ret = mdp->blit(mdp, info, &req);
- if (ret)
- return ret;
- }
- return 0;
-}
-
-
-DEFINE_MUTEX(mdp_ppp_lock);
-
-static int msmfb_ioctl(struct fb_info *p, unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int ret;
-
- switch (cmd) {
- case MSMFB_GRP_DISP:
- mdp->set_grp_disp(mdp, arg);
- break;
- case MSMFB_BLIT:
- ret = msmfb_blit(p, argp);
- if (ret)
- return ret;
- break;
- default:
- printk(KERN_INFO "msmfb unknown ioctl: %d\n", cmd);
- return -EINVAL;
- }
- return 0;
-}
-
-static struct fb_ops msmfb_ops = {
- .owner = THIS_MODULE,
- .fb_open = msmfb_open,
- .fb_release = msmfb_release,
- .fb_check_var = msmfb_check_var,
- .fb_pan_display = msmfb_pan_display,
- .fb_fillrect = msmfb_fillrect,
- .fb_copyarea = msmfb_copyarea,
- .fb_imageblit = msmfb_imageblit,
- .fb_ioctl = msmfb_ioctl,
-};
-
-static unsigned PP[16];
-
-
-
-#define BITS_PER_PIXEL 16
-
-static void setup_fb_info(struct msmfb_info *msmfb)
-{
- struct fb_info *fb_info = msmfb->fb;
- int r;
-
- /* finish setting up the fb_info struct */
- strncpy(fb_info->fix.id, "msmfb", 16);
- fb_info->fix.ypanstep = 1;
-
- fb_info->fbops = &msmfb_ops;
- fb_info->flags = FBINFO_DEFAULT;
-
- fb_info->fix.type = FB_TYPE_PACKED_PIXELS;
- fb_info->fix.visual = FB_VISUAL_TRUECOLOR;
- fb_info->fix.line_length = msmfb->xres * 2;
-
- fb_info->var.xres = msmfb->xres;
- fb_info->var.yres = msmfb->yres;
- fb_info->var.width = msmfb->panel->fb_data->width;
- fb_info->var.height = msmfb->panel->fb_data->height;
- fb_info->var.xres_virtual = msmfb->xres;
- 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 = devm_kzalloc(&pdev->dev,
- msmfb->fb->var.bits_per_pixel*msmfb->xres,
- GFP_KERNEL);
- if (!msmfb->black) {
- ret = -ENOMEM;
- goto error_register_framebuffer;
- }
-
- 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;
-
- platform_set_drvdata(pdev, msmfb);
-
- return 0;
-
-error_register_framebuffer:
- iounmap(fb->screen_base);
-error_setup_fbmem:
- framebuffer_release(msmfb->fb);
- return ret;
-}
-
-static int msmfb_remove(struct platform_device *pdev)
-{
- struct msmfb_info *msmfb;
-
- msmfb = platform_get_drvdata(pdev);
-
- unregister_framebuffer(msmfb->fb);
- iounmap(msmfb->fb->screen_base);
- framebuffer_release(msmfb->fb);
-
- return 0;
-}
-
-static struct platform_driver msm_panel_driver = {
- /* need to write remove */
- .probe = msmfb_probe,
- .remove = msmfb_remove,
- .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);
Code Review / kvmfornfv.git / blobdiff