/* exynos_drm_fimd.c * * Copyright (C) 2011 Samsung Electronics Co.Ltd * Authors: * Joonyoung Shim * Inki Dae * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include "drmP.h" #include #include #include #include #include #include #include #include "exynos_drm_drv.h" #include "exynos_drm_fbdev.h" #include "exynos_drm_crtc.h" /* * FIMD is stand for Fully Interactive Mobile Display and * as a display controller, it transfers contents drawn on memory * to a LCD Panel through Display Interfaces such as RGB or * CPU Interface. */ /* position control register for hardware window 0, 2 ~ 4.*/ #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16) #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16) /* size control register for hardware window 0. */ #define VIDOSD_C_SIZE_W0 (VIDOSD_BASE + 0x08) /* alpha control register for hardware window 1 ~ 4. */ #define VIDOSD_C(win) (VIDOSD_BASE + 0x18 + (win) * 16) /* size control register for hardware window 1 ~ 4. */ #define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16) #define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8) #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8) #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4) /* color key control register for hardware window 1 ~ 4. */ #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + (x * 8)) /* color key value register for hardware window 1 ~ 4. */ #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + (x * 8)) /* FIMD has totally five hardware windows. */ #define WINDOWS_NR 5 #define get_fimd_context(dev) platform_get_drvdata(to_platform_device(dev)) struct fimd_driver_data { unsigned int timing_base; }; struct fimd_driver_data exynos4_fimd_driver_data = { .timing_base = 0x0, }; struct fimd_driver_data exynos5_fimd_driver_data = { .timing_base = 0x20000, }; struct fimd_win_data { unsigned int offset_x; unsigned int offset_y; unsigned int ovl_width; unsigned int ovl_height; unsigned int fb_width; unsigned int fb_height; unsigned int bpp; dma_addr_t dma_addr; void __iomem *vaddr; unsigned int buf_offsize; unsigned int line_size; /* bytes */ bool enabled; }; struct fimd_context { struct exynos_drm_subdrv subdrv; int irq; struct drm_crtc *crtc; struct clk *bus_clk; struct clk *lcd_clk; void __iomem *regs; struct fimd_win_data win_data[WINDOWS_NR]; unsigned int clkdiv; unsigned int default_win; unsigned long irq_flags; u32 vidcon0; u32 vidcon1; bool suspended; struct mutex lock; struct exynos_drm_panel_info *panel; }; static inline struct fimd_driver_data *drm_fimd_get_driver_data( struct platform_device *pdev) { return (struct fimd_driver_data *) platform_get_device_id(pdev)->driver_data; } static bool fimd_display_is_connected(struct device *dev) { DRM_DEBUG_KMS("%s\n", __FILE__); /* TODO. */ return true; } static void *fimd_get_panel(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); DRM_DEBUG_KMS("%s\n", __FILE__); return ctx->panel; } static int fimd_check_timing(struct device *dev, void *timing) { DRM_DEBUG_KMS("%s\n", __FILE__); /* TODO. */ return 0; } static int fimd_display_power_on(struct device *dev, int mode) { DRM_DEBUG_KMS("%s\n", __FILE__); /* TODO */ return 0; } static struct exynos_drm_display_ops fimd_display_ops = { .type = EXYNOS_DISPLAY_TYPE_LCD, .is_connected = fimd_display_is_connected, .get_panel = fimd_get_panel, .check_timing = fimd_check_timing, .power_on = fimd_display_power_on, }; static void fimd_dpms(struct device *subdrv_dev, int mode) { struct fimd_context *ctx = get_fimd_context(subdrv_dev); DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode); mutex_lock(&ctx->lock); switch (mode) { case DRM_MODE_DPMS_ON: /* * enable fimd hardware only if suspended status. * * P.S. fimd_dpms function would be called at booting time so * clk_enable could be called double time. */ if (ctx->suspended) pm_runtime_get_sync(subdrv_dev); break; case DRM_MODE_DPMS_STANDBY: case DRM_MODE_DPMS_SUSPEND: case DRM_MODE_DPMS_OFF: if (!ctx->suspended) pm_runtime_put_sync(subdrv_dev); break; default: DRM_DEBUG_KMS("unspecified mode %d\n", mode); break; } mutex_unlock(&ctx->lock); } static void fimd_apply(struct device *subdrv_dev) { struct fimd_context *ctx = get_fimd_context(subdrv_dev); struct exynos_drm_manager *mgr = ctx->subdrv.manager; struct exynos_drm_manager_ops *mgr_ops = mgr->ops; struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops; struct fimd_win_data *win_data; int i; DRM_DEBUG_KMS("%s\n", __FILE__); for (i = 0; i < WINDOWS_NR; i++) { win_data = &ctx->win_data[i]; if (win_data->enabled && (ovl_ops && ovl_ops->commit)) ovl_ops->commit(subdrv_dev, i); } if (mgr_ops && mgr_ops->commit) mgr_ops->commit(subdrv_dev); } static void fimd_commit(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); struct exynos_drm_panel_info *panel = ctx->panel; struct fb_videomode *timing = &panel->timing; struct fimd_driver_data *driver_data; struct platform_device *pdev = to_platform_device(dev); u32 val; driver_data = drm_fimd_get_driver_data(pdev); if (ctx->suspended) return; DRM_DEBUG_KMS("%s\n", __FILE__); /* setup polarity values from machine code. */ writel(ctx->vidcon1, ctx->regs + driver_data->timing_base + VIDCON1); /* setup vertical timing values. */ val = VIDTCON0_VBPD(timing->upper_margin - 1) | VIDTCON0_VFPD(timing->lower_margin - 1) | VIDTCON0_VSPW(timing->vsync_len - 1); writel(val, ctx->regs + driver_data->timing_base + VIDTCON0); /* setup horizontal timing values. */ val = VIDTCON1_HBPD(timing->left_margin - 1) | VIDTCON1_HFPD(timing->right_margin - 1) | VIDTCON1_HSPW(timing->hsync_len - 1); writel(val, ctx->regs + driver_data->timing_base + VIDTCON1); /* setup horizontal and vertical display size. */ val = VIDTCON2_LINEVAL(timing->yres - 1) | VIDTCON2_HOZVAL(timing->xres - 1); writel(val, ctx->regs + driver_data->timing_base + VIDTCON2); /* setup clock source, clock divider, enable dma. */ val = ctx->vidcon0; val &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR); if (ctx->clkdiv > 1) val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR; else val &= ~VIDCON0_CLKDIR; /* 1:1 clock */ /* * fields of register with prefix '_F' would be updated * at vsync(same as dma start) */ val |= VIDCON0_ENVID | VIDCON0_ENVID_F; writel(val, ctx->regs + VIDCON0); } static int fimd_enable_vblank(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); u32 val; DRM_DEBUG_KMS("%s\n", __FILE__); if (ctx->suspended) return -EPERM; if (!test_and_set_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0); val |= VIDINTCON0_INT_ENABLE; val |= VIDINTCON0_INT_FRAME; val &= ~VIDINTCON0_FRAMESEL0_MASK; val |= VIDINTCON0_FRAMESEL0_VSYNC; val &= ~VIDINTCON0_FRAMESEL1_MASK; val |= VIDINTCON0_FRAMESEL1_NONE; writel(val, ctx->regs + VIDINTCON0); } return 0; } static void fimd_disable_vblank(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); u32 val; DRM_DEBUG_KMS("%s\n", __FILE__); if (ctx->suspended) return; if (test_and_clear_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0); val &= ~VIDINTCON0_INT_FRAME; val &= ~VIDINTCON0_INT_ENABLE; writel(val, ctx->regs + VIDINTCON0); } } static struct exynos_drm_manager_ops fimd_manager_ops = { .dpms = fimd_dpms, .apply = fimd_apply, .commit = fimd_commit, .enable_vblank = fimd_enable_vblank, .disable_vblank = fimd_disable_vblank, }; static void fimd_win_mode_set(struct device *dev, struct exynos_drm_overlay *overlay) { struct fimd_context *ctx = get_fimd_context(dev); struct fimd_win_data *win_data; int win; unsigned long offset; DRM_DEBUG_KMS("%s\n", __FILE__); if (!overlay) { dev_err(dev, "overlay is NULL\n"); return; } win = overlay->zpos; if (win == DEFAULT_ZPOS) win = ctx->default_win; if (win < 0 || win > WINDOWS_NR) return; offset = overlay->fb_x * (overlay->bpp >> 3); offset += overlay->fb_y * overlay->pitch; DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); win_data = &ctx->win_data[win]; win_data->offset_x = overlay->crtc_x; win_data->offset_y = overlay->crtc_y; win_data->ovl_width = overlay->crtc_width; win_data->ovl_height = overlay->crtc_height; win_data->fb_width = overlay->fb_width; win_data->fb_height = overlay->fb_height; win_data->dma_addr = overlay->dma_addr[0] + offset; win_data->vaddr = overlay->vaddr[0] + offset; win_data->bpp = overlay->bpp; win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * (overlay->bpp >> 3); win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", win_data->offset_x, win_data->offset_y); DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", win_data->ovl_width, win_data->ovl_height); DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n", (unsigned long)win_data->dma_addr, (unsigned long)win_data->vaddr); DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", overlay->fb_width, overlay->crtc_width); } static void fimd_win_set_pixfmt(struct device *dev, unsigned int win) { struct fimd_context *ctx = get_fimd_context(dev); struct fimd_win_data *win_data = &ctx->win_data[win]; unsigned long val; DRM_DEBUG_KMS("%s\n", __FILE__); val = WINCONx_ENWIN; switch (win_data->bpp) { case 1: val |= WINCON0_BPPMODE_1BPP; val |= WINCONx_BITSWP; val |= WINCONx_BURSTLEN_4WORD; break; case 2: val |= WINCON0_BPPMODE_2BPP; val |= WINCONx_BITSWP; val |= WINCONx_BURSTLEN_8WORD; break; case 4: val |= WINCON0_BPPMODE_4BPP; val |= WINCONx_BITSWP; val |= WINCONx_BURSTLEN_8WORD; break; case 8: val |= WINCON0_BPPMODE_8BPP_PALETTE; val |= WINCONx_BURSTLEN_8WORD; val |= WINCONx_BYTSWP; break; case 16: val |= WINCON0_BPPMODE_16BPP_565; val |= WINCONx_HAWSWP; val |= WINCONx_BURSTLEN_16WORD; break; case 24: val |= WINCON0_BPPMODE_24BPP_888; val |= WINCONx_WSWP; val |= WINCONx_BURSTLEN_16WORD; break; case 32: val |= WINCON1_BPPMODE_28BPP_A4888 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; val |= WINCONx_WSWP; val |= WINCONx_BURSTLEN_16WORD; break; default: DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n"); val |= WINCON0_BPPMODE_24BPP_888; val |= WINCONx_WSWP; val |= WINCONx_BURSTLEN_16WORD; break; } DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp); writel(val, ctx->regs + WINCON(win)); } static void fimd_win_set_colkey(struct device *dev, unsigned int win) { struct fimd_context *ctx = get_fimd_context(dev); unsigned int keycon0 = 0, keycon1 = 0; DRM_DEBUG_KMS("%s\n", __FILE__); keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F | WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); keycon1 = WxKEYCON1_COLVAL(0xffffffff); writel(keycon0, ctx->regs + WKEYCON0_BASE(win)); writel(keycon1, ctx->regs + WKEYCON1_BASE(win)); } static void fimd_win_commit(struct device *dev, int zpos) { struct fimd_context *ctx = get_fimd_context(dev); struct fimd_win_data *win_data; int win = zpos; unsigned long val, alpha, size; DRM_DEBUG_KMS("%s\n", __FILE__); if (ctx->suspended) return; if (win == DEFAULT_ZPOS) win = ctx->default_win; if (win < 0 || win > WINDOWS_NR) return; win_data = &ctx->win_data[win]; /* * SHADOWCON register is used for enabling timing. * * for example, once only width value of a register is set, * if the dma is started then fimd hardware could malfunction so * with protect window setting, the register fields with prefix '_F' * wouldn't be updated at vsync also but updated once unprotect window * is set. */ /* protect windows */ val = readl(ctx->regs + SHADOWCON); val |= SHADOWCON_WINx_PROTECT(win); writel(val, ctx->regs + SHADOWCON); /* buffer start address */ val = (unsigned long)win_data->dma_addr; writel(val, ctx->regs + VIDWx_BUF_START(win, 0)); /* buffer end address */ size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3); val = (unsigned long)(win_data->dma_addr + size); writel(val, ctx->regs + VIDWx_BUF_END(win, 0)); DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n", (unsigned long)win_data->dma_addr, val, size); DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", win_data->ovl_width, win_data->ovl_height); /* buffer size */ val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) | VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size); writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0)); /* OSD position */ val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) | VIDOSDxA_TOPLEFT_Y(win_data->offset_y); writel(val, ctx->regs + VIDOSD_A(win)); val = VIDOSDxB_BOTRIGHT_X(win_data->offset_x + win_data->ovl_width - 1) | VIDOSDxB_BOTRIGHT_Y(win_data->offset_y + win_data->ovl_height - 1); writel(val, ctx->regs + VIDOSD_B(win)); DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n", win_data->offset_x, win_data->offset_y, win_data->offset_x + win_data->ovl_width - 1, win_data->offset_y + win_data->ovl_height - 1); /* hardware window 0 doesn't support alpha channel. */ if (win != 0) { /* OSD alpha */ alpha = VIDISD14C_ALPHA1_R(0xf) | VIDISD14C_ALPHA1_G(0xf) | VIDISD14C_ALPHA1_B(0xf); writel(alpha, ctx->regs + VIDOSD_C(win)); } /* OSD size */ if (win != 3 && win != 4) { u32 offset = VIDOSD_D(win); if (win == 0) offset = VIDOSD_C_SIZE_W0; val = win_data->ovl_width * win_data->ovl_height; writel(val, ctx->regs + offset); DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val); } fimd_win_set_pixfmt(dev, win); /* hardware window 0 doesn't support color key. */ if (win != 0) fimd_win_set_colkey(dev, win); /* wincon */ val = readl(ctx->regs + WINCON(win)); val |= WINCONx_ENWIN; writel(val, ctx->regs + WINCON(win)); /* Enable DMA channel and unprotect windows */ val = readl(ctx->regs + SHADOWCON); val |= SHADOWCON_CHx_ENABLE(win); val &= ~SHADOWCON_WINx_PROTECT(win); writel(val, ctx->regs + SHADOWCON); win_data->enabled = true; } static void fimd_win_disable(struct device *dev, int zpos) { struct fimd_context *ctx = get_fimd_context(dev); struct fimd_win_data *win_data; int win = zpos; u32 val; DRM_DEBUG_KMS("%s\n", __FILE__); if (win == DEFAULT_ZPOS) win = ctx->default_win; if (win < 0 || win > WINDOWS_NR) return; win_data = &ctx->win_data[win]; /* protect windows */ val = readl(ctx->regs + SHADOWCON); val |= SHADOWCON_WINx_PROTECT(win); writel(val, ctx->regs + SHADOWCON); /* wincon */ val = readl(ctx->regs + WINCON(win)); val &= ~WINCONx_ENWIN; writel(val, ctx->regs + WINCON(win)); /* unprotect windows */ val = readl(ctx->regs + SHADOWCON); val &= ~SHADOWCON_CHx_ENABLE(win); val &= ~SHADOWCON_WINx_PROTECT(win); writel(val, ctx->regs + SHADOWCON); win_data->enabled = false; } static void fimd_wait_for_vblank(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); int ret; ret = wait_for((__raw_readl(ctx->regs + VIDCON1) & VIDCON1_VSTATUS_VSYNC), 50); if (ret < 0) DRM_DEBUG_KMS("vblank wait timed out.\n"); } static struct exynos_drm_overlay_ops fimd_overlay_ops = { .mode_set = fimd_win_mode_set, .commit = fimd_win_commit, .disable = fimd_win_disable, .wait_for_vblank = fimd_wait_for_vblank, }; static struct exynos_drm_manager fimd_manager = { .pipe = -1, .ops = &fimd_manager_ops, .overlay_ops = &fimd_overlay_ops, .display_ops = &fimd_display_ops, }; static void fimd_finish_pageflip(struct drm_device *drm_dev, int crtc) { struct exynos_drm_private *dev_priv = drm_dev->dev_private; struct drm_pending_vblank_event *e, *t; struct timeval now; unsigned long flags; bool is_checked = false; spin_lock_irqsave(&drm_dev->event_lock, flags); list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, base.link) { /* if event's pipe isn't same as crtc then ignore it. */ if (crtc != e->pipe) continue; is_checked = true; do_gettimeofday(&now); e->event.sequence = 0; e->event.tv_sec = now.tv_sec; e->event.tv_usec = now.tv_usec; list_move_tail(&e->base.link, &e->base.file_priv->event_list); wake_up_interruptible(&e->base.file_priv->event_wait); } if (is_checked) { /* * call drm_vblank_put only in case that drm_vblank_get was * called. */ if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0) drm_vblank_put(drm_dev, crtc); /* * don't off vblank if vblank_disable_allowed is 1, * because vblank would be off by timer handler. */ if (!drm_dev->vblank_disable_allowed) drm_vblank_off(drm_dev, crtc); } spin_unlock_irqrestore(&drm_dev->event_lock, flags); } static irqreturn_t fimd_irq_handler(int irq, void *dev_id) { struct fimd_context *ctx = (struct fimd_context *)dev_id; struct exynos_drm_subdrv *subdrv = &ctx->subdrv; struct drm_device *drm_dev = subdrv->drm_dev; struct exynos_drm_manager *manager = subdrv->manager; u32 val; val = readl(ctx->regs + VIDINTCON1); if (val & VIDINTCON1_INT_FRAME) /* VSYNC interrupt */ writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1); /* check the crtc is detached already from encoder */ if (manager->pipe < 0) goto out; drm_handle_vblank(drm_dev, manager->pipe); fimd_finish_pageflip(drm_dev, manager->pipe); out: return IRQ_HANDLED; } static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev) { DRM_DEBUG_KMS("%s\n", __FILE__); /* * enable drm irq mode. * - with irq_enabled = 1, we can use the vblank feature. * * P.S. note that we wouldn't use drm irq handler but * just specific driver own one instead because * drm framework supports only one irq handler. */ drm_dev->irq_enabled = 1; /* * with vblank_disable_allowed = 1, vblank interrupt will be disabled * by drm timer once a current process gives up ownership of * vblank event.(after drm_vblank_put function is called) */ drm_dev->vblank_disable_allowed = 1; return 0; } static void fimd_subdrv_remove(struct drm_device *drm_dev, struct device *dev) { DRM_DEBUG_KMS("%s\n", __FILE__); /* TODO. */ } static int fimd_calc_clkdiv(struct fimd_context *ctx, struct fb_videomode *timing) { unsigned long clk = clk_get_rate(ctx->lcd_clk); u32 retrace; u32 clkdiv; u32 best_framerate = 0; u32 framerate; DRM_DEBUG_KMS("%s\n", __FILE__); retrace = timing->left_margin + timing->hsync_len + timing->right_margin + timing->xres; retrace *= timing->upper_margin + timing->vsync_len + timing->lower_margin + timing->yres; /* default framerate is 60Hz */ if (!timing->refresh) timing->refresh = 60; clk /= retrace; for (clkdiv = 1; clkdiv < 0x100; clkdiv++) { int tmp; /* get best framerate */ framerate = clk / clkdiv; tmp = timing->refresh - framerate; if (tmp < 0) { best_framerate = framerate; continue; } else { if (!best_framerate) best_framerate = framerate; else if (tmp < (best_framerate - framerate)) best_framerate = framerate; break; } } return clkdiv; } static void fimd_clear_win(struct fimd_context *ctx, int win) { u32 val; DRM_DEBUG_KMS("%s\n", __FILE__); writel(0, ctx->regs + WINCON(win)); writel(0, ctx->regs + VIDOSD_A(win)); writel(0, ctx->regs + VIDOSD_B(win)); writel(0, ctx->regs + VIDOSD_C(win)); if (win == 1 || win == 2) writel(0, ctx->regs + VIDOSD_D(win)); val = readl(ctx->regs + SHADOWCON); val &= ~SHADOWCON_WINx_PROTECT(win); writel(val, ctx->regs + SHADOWCON); } static int fimd_clock(struct fimd_context *ctx, bool enable) { DRM_DEBUG_KMS("%s\n", __FILE__); if (enable) { int ret; ret = clk_enable(ctx->bus_clk); if (ret < 0) return ret; ret = clk_enable(ctx->lcd_clk); if (ret < 0) { clk_disable(ctx->bus_clk); return ret; } } else { clk_disable(ctx->lcd_clk); clk_disable(ctx->bus_clk); } return 0; } static int fimd_activate(struct fimd_context *ctx, bool enable) { if (enable) { int ret; struct device *dev = ctx->subdrv.dev; ret = fimd_clock(ctx, true); if (ret < 0) return ret; ctx->suspended = false; /* if vblank was enabled status, enable it again. */ if (test_and_clear_bit(0, &ctx->irq_flags)) fimd_enable_vblank(dev); } else { fimd_clock(ctx, false); ctx->suspended = true; } return 0; } static int __devinit fimd_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct fimd_context *ctx; struct exynos_drm_subdrv *subdrv; struct exynos_drm_fimd_pdata *pdata; struct exynos_drm_panel_info *panel; struct resource *res; int win; int ret = -EINVAL; DRM_DEBUG_KMS("%s\n", __FILE__); pdata = pdev->dev.platform_data; if (!pdata) { dev_err(dev, "no platform data specified\n"); return -EINVAL; } panel = &pdata->panel; if (!panel) { dev_err(dev, "panel is null.\n"); return -EINVAL; } ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->bus_clk = clk_get(dev, "fimd"); if (IS_ERR(ctx->bus_clk)) { dev_err(dev, "failed to get bus clock\n"); ret = PTR_ERR(ctx->bus_clk); goto err_clk_get; } ctx->lcd_clk = clk_get(dev, "sclk_fimd"); if (IS_ERR(ctx->lcd_clk)) { dev_err(dev, "failed to get lcd clock\n"); ret = PTR_ERR(ctx->lcd_clk); goto err_bus_clk; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ctx->regs = devm_request_and_ioremap(&pdev->dev, res); if (!ctx->regs) { dev_err(dev, "failed to map registers\n"); ret = -ENXIO; goto err_clk; } res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { dev_err(dev, "irq request failed.\n"); goto err_clk; } ctx->irq = res->start; ret = devm_request_irq(&pdev->dev, ctx->irq, fimd_irq_handler, 0, "drm_fimd", ctx); if (ret) { dev_err(dev, "irq request failed.\n"); goto err_clk; } ctx->vidcon0 = pdata->vidcon0; ctx->vidcon1 = pdata->vidcon1; ctx->default_win = pdata->default_win; ctx->panel = panel; subdrv = &ctx->subdrv; subdrv->dev = dev; subdrv->manager = &fimd_manager; subdrv->probe = fimd_subdrv_probe; subdrv->remove = fimd_subdrv_remove; mutex_init(&ctx->lock); platform_set_drvdata(pdev, ctx); pm_runtime_enable(dev); pm_runtime_get_sync(dev); ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing); panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv; DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n", panel->timing.pixclock, ctx->clkdiv); for (win = 0; win < WINDOWS_NR; win++) fimd_clear_win(ctx, win); exynos_drm_subdrv_register(subdrv); return 0; err_clk: clk_disable(ctx->lcd_clk); clk_put(ctx->lcd_clk); err_bus_clk: clk_disable(ctx->bus_clk); clk_put(ctx->bus_clk); err_clk_get: return ret; } static int __devexit fimd_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct fimd_context *ctx = platform_get_drvdata(pdev); DRM_DEBUG_KMS("%s\n", __FILE__); exynos_drm_subdrv_unregister(&ctx->subdrv); if (ctx->suspended) goto out; clk_disable(ctx->lcd_clk); clk_disable(ctx->bus_clk); pm_runtime_set_suspended(dev); pm_runtime_put_sync(dev); out: pm_runtime_disable(dev); clk_put(ctx->lcd_clk); clk_put(ctx->bus_clk); return 0; } #ifdef CONFIG_PM_SLEEP static int fimd_suspend(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); /* * do not use pm_runtime_suspend(). if pm_runtime_suspend() is * called here, an error would be returned by that interface * because the usage_count of pm runtime is more than 1. */ if (!pm_runtime_suspended(dev)) return fimd_activate(ctx, false); return 0; } static int fimd_resume(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); /* * if entered to sleep when lcd panel was on, the usage_count * of pm runtime would still be 1 so in this case, fimd driver * should be on directly not drawing on pm runtime interface. */ if (pm_runtime_suspended(dev)) { int ret; ret = fimd_activate(ctx, true); if (ret < 0) return ret; /* * in case of dpms on(standby), fimd_apply function will * be called by encoder's dpms callback to update fimd's * registers but in case of sleep wakeup, it's not. * so fimd_apply function should be called at here. */ fimd_apply(dev); } return 0; } #endif #ifdef CONFIG_PM_RUNTIME static int fimd_runtime_suspend(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); DRM_DEBUG_KMS("%s\n", __FILE__); return fimd_activate(ctx, false); } static int fimd_runtime_resume(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); DRM_DEBUG_KMS("%s\n", __FILE__); return fimd_activate(ctx, true); } #endif static struct platform_device_id fimd_driver_ids[] = { { .name = "exynos4-fb", .driver_data = (unsigned long)&exynos4_fimd_driver_data, }, { .name = "exynos5-fb", .driver_data = (unsigned long)&exynos5_fimd_driver_data, }, {}, }; MODULE_DEVICE_TABLE(platform, fimd_driver_ids); static const struct dev_pm_ops fimd_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume) SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL) }; struct platform_driver fimd_driver = { .probe = fimd_probe, .remove = __devexit_p(fimd_remove), .id_table = fimd_driver_ids, .driver = { .name = "exynos4-fb", .owner = THIS_MODULE, .pm = &fimd_pm_ops, }, };