| /* 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 = 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; |
| |
| 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); |