| /* 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 <video/exynos7_decon.h> |
| |
| #include "exynos_drm_crtc.h" |
| #include "exynos_drm_plane.h" |
| #include "exynos_drm_drv.h" |
| #include "exynos_drm_fb.h" |
| #include "exynos_drm_iommu.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 drm_iommu_attach_device(drm_dev, ctx->dev); |
| } |
| |
| static void decon_ctx_remove(struct decon_context *ctx) |
| { |
| /* detach this sub driver from iommu mapping if supported. */ |
| drm_iommu_detach_device(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: |
| val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX | |
| WINCONx_ALPHA_SEL; |
| val |= WINCONx_BURSTLEN_16WORD; |
| break; |
| default: |
| DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n"); |
| |
| val |= WINCONx_BPPMODE_24BPP_xRGB; |
| val |= WINCONx_BURSTLEN_16WORD; |
| break; |
| } |
| |
| DRM_DEBUG_KMS("bpp = %d\n", fb->format->cpp[0] * 8); |
| |
| /* |
| * 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 bpp = 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 / bpp) - 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) |
| }; |
| |
| 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, |
| }, |
| }; |