| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ajay Kumar | 2872 | 77.16% | 1 | 2.56% |
| Gustavo Padovan | 457 | 12.28% | 13 | 33.33% |
| Marek Szyprowski | 230 | 6.18% | 7 | 17.95% |
| Hyungwon Hwang | 93 | 2.50% | 2 | 5.13% |
| Joonyoung Shim | 29 | 0.78% | 3 | 7.69% |
| Ville Syrjälä | 21 | 0.56% | 2 | 5.13% |
| Andrzej Hajda | 10 | 0.27% | 5 | 12.82% |
| Tobias Jakobi | 5 | 0.13% | 3 | 7.69% |
| Dan Carpenter | 3 | 0.08% | 1 | 2.56% |
| Krzysztof Kozlowski | 2 | 0.05% | 2 | 5.13% |
| Total | 3722 | 39 |
/* drivers/gpu/drm/exynos/exynos7_drm_decon.c * * Copyright (C) 2014 Samsung Electronics Co.Ltd * Authors: * Akshu Agarwal <akshua@gmail.com> * Ajay Kumar <ajaykumar.rs@samsung.com> * * 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 <drm/drmP.h> #include <drm/exynos_drm.h> #include <linux/clk.h> #include <linux/component.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <video/of_display_timing.h> #include <video/of_videomode.h> #include "exynos_drm_crtc.h" #include "exynos_drm_plane.h" #include "exynos_drm_drv.h" #include "exynos_drm_fb.h" #include "regs-decon7.h" /* * DECON stands for Display and Enhancement controller. */ #define MIN_FB_WIDTH_FOR_16WORD_BURST 128 #define WINDOWS_NR 2 struct decon_context { struct device *dev; struct drm_device *drm_dev; struct exynos_drm_crtc *crtc; struct exynos_drm_plane planes[WINDOWS_NR]; struct exynos_drm_plane_config configs[WINDOWS_NR]; struct clk *pclk; struct clk *aclk; struct clk *eclk; struct clk *vclk; void __iomem *regs; unsigned long irq_flags; bool i80_if; bool suspended; wait_queue_head_t wait_vsync_queue; atomic_t wait_vsync_event; struct drm_encoder *encoder; }; static const struct of_device_id decon_driver_dt_match[] = { {.compatible = "samsung,exynos7-decon"}, {}, }; MODULE_DEVICE_TABLE(of, decon_driver_dt_match); static const uint32_t decon_formats[] = { DRM_FORMAT_RGB565, DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888, DRM_FORMAT_RGBX8888, DRM_FORMAT_BGRX8888, DRM_FORMAT_ARGB8888, DRM_FORMAT_ABGR8888, DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888, }; static const enum drm_plane_type decon_win_types[WINDOWS_NR] = { DRM_PLANE_TYPE_PRIMARY, DRM_PLANE_TYPE_CURSOR, }; static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; if (ctx->suspended) return; atomic_set(&ctx->wait_vsync_event, 1); /* * wait for DECON to signal VSYNC interrupt or return after * timeout which is set to 50ms (refresh rate of 20). */ if (!wait_event_timeout(ctx->wait_vsync_queue, !atomic_read(&ctx->wait_vsync_event), HZ/20)) DRM_DEBUG_KMS("vblank wait timed out.\n"); } static void decon_clear_channels(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; unsigned int win, ch_enabled = 0; DRM_DEBUG_KMS("%s\n", __FILE__); /* Check if any channel is enabled. */ for (win = 0; win < WINDOWS_NR; win++) { u32 val = readl(ctx->regs + WINCON(win)); if (val & WINCONx_ENWIN) { val &= ~WINCONx_ENWIN; writel(val, ctx->regs + WINCON(win)); ch_enabled = 1; } } /* Wait for vsync, as disable channel takes effect at next vsync */ if (ch_enabled) decon_wait_for_vblank(ctx->crtc); } static int decon_ctx_initialize(struct decon_context *ctx, struct drm_device *drm_dev) { ctx->drm_dev = drm_dev; decon_clear_channels(ctx->crtc); return exynos_drm_register_dma(drm_dev, ctx->dev); } static void decon_ctx_remove(struct decon_context *ctx) { /* detach this sub driver from iommu mapping if supported. */ exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev); } static u32 decon_calc_clkdiv(struct decon_context *ctx, const struct drm_display_mode *mode) { unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh; u32 clkdiv; /* Find the clock divider value that gets us closest to ideal_clk */ clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk); return (clkdiv < 0x100) ? clkdiv : 0xff; } static void decon_commit(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; struct drm_display_mode *mode = &crtc->base.state->adjusted_mode; u32 val, clkdiv; if (ctx->suspended) return; /* nothing to do if we haven't set the mode yet */ if (mode->htotal == 0 || mode->vtotal == 0) return; if (!ctx->i80_if) { int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd; /* setup vertical timing values. */ vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start; vbpd = mode->crtc_vtotal - mode->crtc_vsync_end; vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay; val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1); writel(val, ctx->regs + VIDTCON0); val = VIDTCON1_VSPW(vsync_len - 1); writel(val, ctx->regs + VIDTCON1); /* setup horizontal timing values. */ hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start; hbpd = mode->crtc_htotal - mode->crtc_hsync_end; hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay; /* setup horizontal timing values. */ val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1); writel(val, ctx->regs + VIDTCON2); val = VIDTCON3_HSPW(hsync_len - 1); writel(val, ctx->regs + VIDTCON3); } /* setup horizontal and vertical display size. */ val = VIDTCON4_LINEVAL(mode->vdisplay - 1) | VIDTCON4_HOZVAL(mode->hdisplay - 1); writel(val, ctx->regs + VIDTCON4); writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD); /* * 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); clkdiv = decon_calc_clkdiv(ctx, mode); if (clkdiv > 1) { val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1); writel(val, ctx->regs + VCLKCON1); writel(val, ctx->regs + VCLKCON2); } val = readl(ctx->regs + DECON_UPDATE); val |= DECON_UPDATE_STANDALONE_F; writel(val, ctx->regs + DECON_UPDATE); } static int decon_enable_vblank(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; u32 val; if (ctx->suspended) return -EPERM; if (!test_and_set_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0); val |= VIDINTCON0_INT_ENABLE; if (!ctx->i80_if) { val |= VIDINTCON0_INT_FRAME; val &= ~VIDINTCON0_FRAMESEL0_MASK; val |= VIDINTCON0_FRAMESEL0_VSYNC; } writel(val, ctx->regs + VIDINTCON0); } return 0; } static void decon_disable_vblank(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; u32 val; if (ctx->suspended) return; if (test_and_clear_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0); val &= ~VIDINTCON0_INT_ENABLE; if (!ctx->i80_if) val &= ~VIDINTCON0_INT_FRAME; writel(val, ctx->regs + VIDINTCON0); } } static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win, struct drm_framebuffer *fb) { unsigned long val; int padding; val = readl(ctx->regs + WINCON(win)); val &= ~WINCONx_BPPMODE_MASK; switch (fb->format->format) { case DRM_FORMAT_RGB565: val |= WINCONx_BPPMODE_16BPP_565; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_XRGB8888: val |= WINCONx_BPPMODE_24BPP_xRGB; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_XBGR8888: val |= WINCONx_BPPMODE_24BPP_xBGR; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_RGBX8888: val |= WINCONx_BPPMODE_24BPP_RGBx; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_BGRX8888: val |= WINCONx_BPPMODE_24BPP_BGRx; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_ARGB8888: val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX | WINCONx_ALPHA_SEL; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_ABGR8888: val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX | WINCONx_ALPHA_SEL; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_RGBA8888: val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX | WINCONx_ALPHA_SEL; val |= WINCONx_BURSTLEN_16WORD; break; case DRM_FORMAT_BGRA8888: default: val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX | WINCONx_ALPHA_SEL; val |= WINCONx_BURSTLEN_16WORD; break; } DRM_DEBUG_KMS("cpp = %d\n", fb->format->cpp[0]); /* * In case of exynos, setting dma-burst to 16Word causes permanent * tearing for very small buffers, e.g. cursor buffer. Burst Mode * switching which is based on plane size is not recommended as * plane size varies a lot towards the end of the screen and rapid * movement causes unstable DMA which results into iommu crash/tear. */ padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width; if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) { val &= ~WINCONx_BURSTLEN_MASK; val |= WINCONx_BURSTLEN_8WORD; } writel(val, ctx->regs + WINCON(win)); } static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win) { unsigned int keycon0 = 0, keycon1 = 0; 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)); } /** * shadow_protect_win() - disable updating values from shadow registers at vsync * * @win: window to protect registers for * @protect: 1 to protect (disable updates) */ static void decon_shadow_protect_win(struct decon_context *ctx, unsigned int win, bool protect) { u32 bits, val; bits = SHADOWCON_WINx_PROTECT(win); val = readl(ctx->regs + SHADOWCON); if (protect) val |= bits; else val &= ~bits; writel(val, ctx->regs + SHADOWCON); } static void decon_atomic_begin(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; int i; if (ctx->suspended) return; for (i = 0; i < WINDOWS_NR; i++) decon_shadow_protect_win(ctx, i, true); } static void decon_update_plane(struct exynos_drm_crtc *crtc, struct exynos_drm_plane *plane) { struct exynos_drm_plane_state *state = to_exynos_plane_state(plane->base.state); struct decon_context *ctx = crtc->ctx; struct drm_framebuffer *fb = state->base.fb; int padding; unsigned long val, alpha; unsigned int last_x; unsigned int last_y; unsigned int win = plane->index; unsigned int cpp = fb->format->cpp[0]; unsigned int pitch = fb->pitches[0]; if (ctx->suspended) return; /* * SHADOWCON/PRTCON register is used for enabling timing. * * for example, once only width value of a register is set, * if the dma is started then decon 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. */ /* buffer start address */ val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0); writel(val, ctx->regs + VIDW_BUF_START(win)); padding = (pitch / cpp) - fb->width; /* buffer size */ writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win)); writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win)); /* offset from the start of the buffer to read */ writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win)); writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win)); DRM_DEBUG_KMS("start addr = 0x%lx\n", (unsigned long)val); DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", state->crtc.w, state->crtc.h); val = VIDOSDxA_TOPLEFT_X(state->crtc.x) | VIDOSDxA_TOPLEFT_Y(state->crtc.y); writel(val, ctx->regs + VIDOSD_A(win)); last_x = state->crtc.x + state->crtc.w; if (last_x) last_x--; last_y = state->crtc.y + state->crtc.h; if (last_y) last_y--; val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y); writel(val, ctx->regs + VIDOSD_B(win)); DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n", state->crtc.x, state->crtc.y, last_x, last_y); /* OSD alpha */ alpha = VIDOSDxC_ALPHA0_R_F(0x0) | VIDOSDxC_ALPHA0_G_F(0x0) | VIDOSDxC_ALPHA0_B_F(0x0); writel(alpha, ctx->regs + VIDOSD_C(win)); alpha = VIDOSDxD_ALPHA1_R_F(0xff) | VIDOSDxD_ALPHA1_G_F(0xff) | VIDOSDxD_ALPHA1_B_F(0xff); writel(alpha, ctx->regs + VIDOSD_D(win)); decon_win_set_pixfmt(ctx, win, fb); /* hardware window 0 doesn't support color key. */ if (win != 0) decon_win_set_colkey(ctx, win); /* wincon */ val = readl(ctx->regs + WINCON(win)); val |= WINCONx_TRIPLE_BUF_MODE; val |= WINCONx_ENWIN; writel(val, ctx->regs + WINCON(win)); /* Enable DMA channel and unprotect windows */ decon_shadow_protect_win(ctx, win, false); val = readl(ctx->regs + DECON_UPDATE); val |= DECON_UPDATE_STANDALONE_F; writel(val, ctx->regs + DECON_UPDATE); } static void decon_disable_plane(struct exynos_drm_crtc *crtc, struct exynos_drm_plane *plane) { struct decon_context *ctx = crtc->ctx; unsigned int win = plane->index; u32 val; if (ctx->suspended) return; /* protect windows */ decon_shadow_protect_win(ctx, win, true); /* wincon */ val = readl(ctx->regs + WINCON(win)); val &= ~WINCONx_ENWIN; writel(val, ctx->regs + WINCON(win)); val = readl(ctx->regs + DECON_UPDATE); val |= DECON_UPDATE_STANDALONE_F; writel(val, ctx->regs + DECON_UPDATE); } static void decon_atomic_flush(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; int i; if (ctx->suspended) return; for (i = 0; i < WINDOWS_NR; i++) decon_shadow_protect_win(ctx, i, false); exynos_crtc_handle_event(crtc); } static void decon_init(struct decon_context *ctx) { u32 val; writel(VIDCON0_SWRESET, ctx->regs + VIDCON0); val = VIDOUTCON0_DISP_IF_0_ON; if (!ctx->i80_if) val |= VIDOUTCON0_RGBIF; writel(val, ctx->regs + VIDOUTCON0); writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0); if (!ctx->i80_if) writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0)); } static void decon_enable(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; if (!ctx->suspended) return; pm_runtime_get_sync(ctx->dev); decon_init(ctx); /* if vblank was enabled status, enable it again. */ if (test_and_clear_bit(0, &ctx->irq_flags)) decon_enable_vblank(ctx->crtc); decon_commit(ctx->crtc); ctx->suspended = false; } static void decon_disable(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; int i; if (ctx->suspended) return; /* * We need to make sure that all windows are disabled before we * suspend that connector. Otherwise we might try to scan from * a destroyed buffer later. */ for (i = 0; i < WINDOWS_NR; i++) decon_disable_plane(crtc, &ctx->planes[i]); pm_runtime_put_sync(ctx->dev); ctx->suspended = true; } static const struct exynos_drm_crtc_ops decon_crtc_ops = { .enable = decon_enable, .disable = decon_disable, .enable_vblank = decon_enable_vblank, .disable_vblank = decon_disable_vblank, .atomic_begin = decon_atomic_begin, .update_plane = decon_update_plane, .disable_plane = decon_disable_plane, .atomic_flush = decon_atomic_flush, }; static irqreturn_t decon_irq_handler(int irq, void *dev_id) { struct decon_context *ctx = (struct decon_context *)dev_id; u32 val, clear_bit; val = readl(ctx->regs + VIDINTCON1); clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME; if (val & clear_bit) writel(clear_bit, ctx->regs + VIDINTCON1); /* check the crtc is detached already from encoder */ if (!ctx->drm_dev) goto out; if (!ctx->i80_if) { drm_crtc_handle_vblank(&ctx->crtc->base); /* set wait vsync event to zero and wake up queue. */ if (atomic_read(&ctx->wait_vsync_event)) { atomic_set(&ctx->wait_vsync_event, 0); wake_up(&ctx->wait_vsync_queue); } } out: return IRQ_HANDLED; } static int decon_bind(struct device *dev, struct device *master, void *data) { struct decon_context *ctx = dev_get_drvdata(dev); struct drm_device *drm_dev = data; struct exynos_drm_plane *exynos_plane; unsigned int i; int ret; ret = decon_ctx_initialize(ctx, drm_dev); if (ret) { DRM_ERROR("decon_ctx_initialize failed.\n"); return ret; } for (i = 0; i < WINDOWS_NR; i++) { ctx->configs[i].pixel_formats = decon_formats; ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats); ctx->configs[i].zpos = i; ctx->configs[i].type = decon_win_types[i]; ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, &ctx->configs[i]); if (ret) return ret; } exynos_plane = &ctx->planes[DEFAULT_WIN]; ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx); if (IS_ERR(ctx->crtc)) { decon_ctx_remove(ctx); return PTR_ERR(ctx->crtc); } if (ctx->encoder) exynos_dpi_bind(drm_dev, ctx->encoder); return 0; } static void decon_unbind(struct device *dev, struct device *master, void *data) { struct decon_context *ctx = dev_get_drvdata(dev); decon_disable(ctx->crtc); if (ctx->encoder) exynos_dpi_remove(ctx->encoder); decon_ctx_remove(ctx); } static const struct component_ops decon_component_ops = { .bind = decon_bind, .unbind = decon_unbind, }; static int decon_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct decon_context *ctx; struct device_node *i80_if_timings; struct resource *res; int ret; if (!dev->of_node) return -ENODEV; ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->dev = dev; ctx->suspended = true; i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings"); if (i80_if_timings) ctx->i80_if = true; of_node_put(i80_if_timings); ctx->regs = of_iomap(dev->of_node, 0); if (!ctx->regs) return -ENOMEM; ctx->pclk = devm_clk_get(dev, "pclk_decon0"); if (IS_ERR(ctx->pclk)) { dev_err(dev, "failed to get bus clock pclk\n"); ret = PTR_ERR(ctx->pclk); goto err_iounmap; } ctx->aclk = devm_clk_get(dev, "aclk_decon0"); if (IS_ERR(ctx->aclk)) { dev_err(dev, "failed to get bus clock aclk\n"); ret = PTR_ERR(ctx->aclk); goto err_iounmap; } ctx->eclk = devm_clk_get(dev, "decon0_eclk"); if (IS_ERR(ctx->eclk)) { dev_err(dev, "failed to get eclock\n"); ret = PTR_ERR(ctx->eclk); goto err_iounmap; } ctx->vclk = devm_clk_get(dev, "decon0_vclk"); if (IS_ERR(ctx->vclk)) { dev_err(dev, "failed to get vclock\n"); ret = PTR_ERR(ctx->vclk); goto err_iounmap; } res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, ctx->i80_if ? "lcd_sys" : "vsync"); if (!res) { dev_err(dev, "irq request failed.\n"); ret = -ENXIO; goto err_iounmap; } ret = devm_request_irq(dev, res->start, decon_irq_handler, 0, "drm_decon", ctx); if (ret) { dev_err(dev, "irq request failed.\n"); goto err_iounmap; } init_waitqueue_head(&ctx->wait_vsync_queue); atomic_set(&ctx->wait_vsync_event, 0); platform_set_drvdata(pdev, ctx); ctx->encoder = exynos_dpi_probe(dev); if (IS_ERR(ctx->encoder)) { ret = PTR_ERR(ctx->encoder); goto err_iounmap; } pm_runtime_enable(dev); ret = component_add(dev, &decon_component_ops); if (ret) goto err_disable_pm_runtime; return ret; err_disable_pm_runtime: pm_runtime_disable(dev); err_iounmap: iounmap(ctx->regs); return ret; } static int decon_remove(struct platform_device *pdev) { struct decon_context *ctx = dev_get_drvdata(&pdev->dev); pm_runtime_disable(&pdev->dev); iounmap(ctx->regs); component_del(&pdev->dev, &decon_component_ops); return 0; } #ifdef CONFIG_PM static int exynos7_decon_suspend(struct device *dev) { struct decon_context *ctx = dev_get_drvdata(dev); clk_disable_unprepare(ctx->vclk); clk_disable_unprepare(ctx->eclk); clk_disable_unprepare(ctx->aclk); clk_disable_unprepare(ctx->pclk); return 0; } static int exynos7_decon_resume(struct device *dev) { struct decon_context *ctx = dev_get_drvdata(dev); int ret; ret = clk_prepare_enable(ctx->pclk); if (ret < 0) { DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret); return ret; } ret = clk_prepare_enable(ctx->aclk); if (ret < 0) { DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret); return ret; } ret = clk_prepare_enable(ctx->eclk); if (ret < 0) { DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret); return ret; } ret = clk_prepare_enable(ctx->vclk); if (ret < 0) { DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret); return ret; } return 0; } #endif static const struct dev_pm_ops exynos7_decon_pm_ops = { SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; struct platform_driver decon_driver = { .probe = decon_probe, .remove = decon_remove, .driver = { .name = "exynos-decon", .pm = &exynos7_decon_pm_ops, .of_match_table = decon_driver_dt_match, }, };
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