1 files changed, 141 insertions, 139 deletions

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
index 3e88269fdc2e..bb74b17f9753 100644
--- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -1,37 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* 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 <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+#include <drm/exynos_drm.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"
+#include "exynos_drm_plane.h"
+#include "regs-decon7.h"
 
 /*
  * DECON stands for Display and Enhancement controller.
@@ -41,9 +38,28 @@
 
 #define WINDOWS_NR	2
 
+struct decon_data {
+	unsigned int vidw_buf_start_base;
+	unsigned int shadowcon_win_protect_shift;
+	unsigned int wincon_burstlen_shift;
+};
+
+static const struct decon_data exynos7_decon_data = {
+	.vidw_buf_start_base = 0x80,
+	.shadowcon_win_protect_shift = 10,
+	.wincon_burstlen_shift = 11,
+};
+
+static const struct decon_data exynos7870_decon_data = {
+	.vidw_buf_start_base = 0x880,
+	.shadowcon_win_protect_shift = 8,
+	.wincon_burstlen_shift = 10,
+};
+
 struct decon_context {
 	struct device			*dev;
 	struct drm_device		*drm_dev;
+	void				*dma_priv;
 	struct exynos_drm_crtc		*crtc;
 	struct exynos_drm_plane		planes[WINDOWS_NR];
 	struct exynos_drm_plane_config	configs[WINDOWS_NR];
@@ -54,15 +70,22 @@ struct decon_context {
 	void __iomem			*regs;
 	unsigned long			irq_flags;
 	bool				i80_if;
-	bool				suspended;
 	wait_queue_head_t		wait_vsync_queue;
 	atomic_t			wait_vsync_event;
 
+	const struct decon_data *data;
 	struct drm_encoder *encoder;
 };
 
 static const struct of_device_id decon_driver_dt_match[] = {
-	{.compatible = "samsung,exynos7-decon"},
+	{
+		.compatible = "samsung,exynos7-decon",
+		.data = &exynos7_decon_data,
+	},
+	{
+		.compatible = "samsung,exynos7870-decon",
+		.data = &exynos7870_decon_data,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
@@ -84,13 +107,31 @@ static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
 	DRM_PLANE_TYPE_CURSOR,
 };
 
-static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
+/**
+ * decon_shadow_protect_win() - disable updating values from shadow registers at vsync
+ *
+ * @ctx: display and enhancement controller context
+ * @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)
 {
-	struct decon_context *ctx = crtc->ctx;
+	u32 bits, val;
+	unsigned int shift = ctx->data->shadowcon_win_protect_shift;
 
-	if (ctx->suspended)
-		return;
+	bits = SHADOWCON_WINx_PROTECT(shift, win);
+
+	val = readl(ctx->regs + SHADOWCON);
+	if (protect)
+		val |= bits;
+	else
+		val &= ~bits;
+	writel(val, ctx->regs + SHADOWCON);
+}
 
+static void decon_wait_for_vblank(struct decon_context *ctx)
+{
 	atomic_set(&ctx->wait_vsync_event, 1);
 
 	/*
@@ -100,30 +141,36 @@ static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
 	if (!wait_event_timeout(ctx->wait_vsync_queue,
 				!atomic_read(&ctx->wait_vsync_event),
 				HZ/20))
-		DRM_DEBUG_KMS("vblank wait timed out.\n");
+		DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
 }
 
-static void decon_clear_channels(struct exynos_drm_crtc *crtc)
+static void decon_clear_channels(struct decon_context *ctx)
 {
-	struct decon_context *ctx = crtc->ctx;
 	unsigned int win, ch_enabled = 0;
-
-	DRM_DEBUG_KMS("%s\n", __FILE__);
+	u32 val;
 
 	/* Check if any channel is enabled. */
 	for (win = 0; win < WINDOWS_NR; win++) {
-		u32 val = readl(ctx->regs + WINCON(win));
+		val = readl(ctx->regs + WINCON(win));
 
 		if (val & WINCONx_ENWIN) {
+			decon_shadow_protect_win(ctx, win, true);
+
 			val &= ~WINCONx_ENWIN;
 			writel(val, ctx->regs + WINCON(win));
 			ch_enabled = 1;
+
+			decon_shadow_protect_win(ctx, win, false);
 		}
 	}
 
+	val = readl(ctx->regs + DECON_UPDATE);
+	val |= DECON_UPDATE_STANDALONE_F;
+	writel(val, ctx->regs + DECON_UPDATE);
+
 	/* Wait for vsync, as disable channel takes effect at next vsync */
 	if (ch_enabled)
-		decon_wait_for_vblank(ctx->crtc);
+		decon_wait_for_vblank(ctx);
 }
 
 static int decon_ctx_initialize(struct decon_context *ctx,
@@ -131,21 +178,21 @@ static int decon_ctx_initialize(struct decon_context *ctx,
 {
 	ctx->drm_dev = drm_dev;
 
-	decon_clear_channels(ctx->crtc);
+	decon_clear_channels(ctx);
 
-	return drm_iommu_attach_device(drm_dev, ctx->dev);
+	return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv);
 }
 
 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);
+	exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);
 }
 
 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;
+	unsigned long ideal_clk = mode->clock * 1000;
 	u32 clkdiv;
 
 	/* Find the clock divider value that gets us closest to ideal_clk */
@@ -160,9 +207,6 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
 	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;
@@ -224,9 +268,6 @@ 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);
 
@@ -249,9 +290,6 @@ 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);
 
@@ -268,6 +306,7 @@ static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 {
 	unsigned long val;
 	int padding;
+	unsigned int shift = ctx->data->wincon_burstlen_shift;
 
 	val = readl(ctx->regs + WINCON(win));
 	val &= ~WINCONx_BPPMODE_MASK;
@@ -275,53 +314,48 @@ static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 	switch (fb->format->format) {
 	case DRM_FORMAT_RGB565:
 		val |= WINCONx_BPPMODE_16BPP_565;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_XRGB8888:
 		val |= WINCONx_BPPMODE_24BPP_xRGB;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_XBGR8888:
 		val |= WINCONx_BPPMODE_24BPP_xBGR;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_RGBX8888:
 		val |= WINCONx_BPPMODE_24BPP_RGBx;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_BGRX8888:
 		val |= WINCONx_BPPMODE_24BPP_BGRx;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_ARGB8888:
 		val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
 			WINCONx_ALPHA_SEL;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_ABGR8888:
 		val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
 			WINCONx_ALPHA_SEL;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_RGBA8888:
 		val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
 			WINCONx_ALPHA_SEL;
-		val |= WINCONx_BURSTLEN_16WORD;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	case DRM_FORMAT_BGRA8888:
+	default:
 		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;
+		val |= WINCONx_BURSTLEN_16WORD(shift);
 		break;
 	}
 
-	DRM_DEBUG_KMS("bpp = %d\n", fb->format->cpp[0] * 8);
+	DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);
 
 	/*
 	 * In case of exynos, setting dma-burst to 16Word causes permanent
@@ -333,8 +367,8 @@ static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 
 	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;
+		val &= ~WINCONx_BURSTLEN_MASK(shift);
+		val |= WINCONx_BURSTLEN_8WORD(shift);
 	}
 
 	writel(val, ctx->regs + WINCON(win));
@@ -353,35 +387,11 @@ static void decon_win_set_colkey(struct decon_context *ctx, unsigned int 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);
 }
@@ -398,11 +408,9 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
 	unsigned int last_x;
 	unsigned int last_y;
 	unsigned int win = plane->index;
-	unsigned int bpp = fb->format->cpp[0];
+	unsigned int cpp = fb->format->cpp[0];
 	unsigned int pitch = fb->pitches[0];
-
-	if (ctx->suspended)
-		return;
+	unsigned int vidw_addr0_base = ctx->data->vidw_buf_start_base;
 
 	/*
 	 * SHADOWCON/PRTCON register is used for enabling timing.
@@ -416,9 +424,9 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
 
 	/* buffer start address */
 	val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
-	writel(val, ctx->regs + VIDW_BUF_START(win));
+	writel(val, ctx->regs + VIDW_BUF_START(vidw_addr0_base, win));
 
-	padding = (pitch / bpp) - fb->width;
+	padding = (pitch / cpp) - fb->width;
 
 	/* buffer size */
 	writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
@@ -428,9 +436,9 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
 	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",
+	DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",
 			(unsigned long)val);
-	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
+	DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
 			state->crtc.w, state->crtc.h);
 
 	val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
@@ -448,7 +456,7 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
 
 	writel(val, ctx->regs + VIDOSD_B(win));
 
-	DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
+	DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
 			state->crtc.x, state->crtc.y, last_x, last_y);
 
 	/* OSD alpha */
@@ -491,9 +499,6 @@ static void decon_disable_plane(struct exynos_drm_crtc *crtc,
 	unsigned int win = plane->index;
 	u32 val;
 
-	if (ctx->suspended)
-		return;
-
 	/* protect windows */
 	decon_shadow_protect_win(ctx, win, true);
 
@@ -512,9 +517,6 @@ 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);
@@ -537,14 +539,16 @@ static void decon_init(struct decon_context *ctx)
 		writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
 }
 
-static void decon_enable(struct exynos_drm_crtc *crtc)
+static void decon_atomic_enable(struct exynos_drm_crtc *crtc)
 {
 	struct decon_context *ctx = crtc->ctx;
+	int ret;
 
-	if (!ctx->suspended)
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n");
 		return;
-
-	pm_runtime_get_sync(ctx->dev);
+	}
 
 	decon_init(ctx);
 
@@ -553,18 +557,13 @@ static void decon_enable(struct exynos_drm_crtc *crtc)
 		decon_enable_vblank(ctx->crtc);
 
 	decon_commit(ctx->crtc);
-
-	ctx->suspended = false;
 }
 
-static void decon_disable(struct exynos_drm_crtc *crtc)
+static void decon_atomic_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
@@ -574,13 +573,11 @@ static void decon_disable(struct exynos_drm_crtc *crtc)
 		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,
+	.atomic_enable = decon_atomic_enable,
+	.atomic_disable = decon_atomic_disable,
 	.enable_vblank = decon_enable_vblank,
 	.disable_vblank = decon_disable_vblank,
 	.atomic_begin = decon_atomic_begin,
@@ -605,6 +602,10 @@ static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 	if (!ctx->drm_dev)
 		goto out;
 
+	/* check if crtc and vblank have been initialized properly */
+	if (!drm_dev_has_vblank(ctx->drm_dev))
+		goto out;
+
 	if (!ctx->i80_if) {
 		drm_crtc_handle_vblank(&ctx->crtc->base);
 
@@ -628,7 +629,7 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
 
 	ret = decon_ctx_initialize(ctx, drm_dev);
 	if (ret) {
-		DRM_ERROR("decon_ctx_initialize failed.\n");
+		DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n");
 		return ret;
 	}
 
@@ -664,7 +665,7 @@ static void decon_unbind(struct device *dev, struct device *master,
 {
 	struct decon_context *ctx = dev_get_drvdata(dev);
 
-	decon_disable(ctx->crtc);
+	decon_atomic_disable(ctx->crtc);
 
 	if (ctx->encoder)
 		exynos_dpi_remove(ctx->encoder);
@@ -682,7 +683,6 @@ 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)
@@ -693,7 +693,7 @@ static int decon_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	ctx->dev = dev;
-	ctx->suspended = true;
+	ctx->data = of_device_get_match_data(dev);
 
 	i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
 	if (i80_if_timings)
@@ -732,16 +732,11 @@ static int decon_probe(struct platform_device *pdev)
 		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;
+	ret =  platform_get_irq_byname(pdev, ctx->i80_if ? "lcd_sys" : "vsync");
+	if (ret < 0)
 		goto err_iounmap;
-	}
 
-	ret = devm_request_irq(dev, res->start, decon_irq_handler,
-							0, "drm_decon", ctx);
+	ret = devm_request_irq(dev, ret, decon_irq_handler, 0, "drm_decon", ctx);
 	if (ret) {
 		dev_err(dev, "irq request failed.\n");
 		goto err_iounmap;
@@ -775,7 +770,7 @@ err_iounmap:
 	return ret;
 }
 
-static int decon_remove(struct platform_device *pdev)
+static void decon_remove(struct platform_device *pdev)
 {
 	struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
 
@@ -784,11 +779,8 @@ static int decon_remove(struct platform_device *pdev)
 	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);
@@ -808,43 +800,53 @@ static int exynos7_decon_resume(struct device *dev)
 
 	ret = clk_prepare_enable(ctx->pclk);
 	if (ret < 0) {
-		DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret);
-		return ret;
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n",
+			      ret);
+		goto err_pclk_enable;
 	}
 
 	ret = clk_prepare_enable(ctx->aclk);
 	if (ret < 0) {
-		DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret);
-		return ret;
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n",
+			      ret);
+		goto err_aclk_enable;
 	}
 
 	ret = clk_prepare_enable(ctx->eclk);
 	if  (ret < 0) {
-		DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret);
-		return ret;
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n",
+			      ret);
+		goto err_eclk_enable;
 	}
 
 	ret = clk_prepare_enable(ctx->vclk);
 	if  (ret < 0) {
-		DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret);
-		return ret;
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n",
+			      ret);
+		goto err_vclk_enable;
 	}
 
 	return 0;
+
+err_vclk_enable:
+	clk_disable_unprepare(ctx->eclk);
+err_eclk_enable:
+	clk_disable_unprepare(ctx->aclk);
+err_aclk_enable:
+	clk_disable_unprepare(ctx->pclk);
+err_pclk_enable:
+	return ret;
 }
-#endif
 
-static const struct dev_pm_ops exynos7_decon_pm_ops = {
-	SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume,
-			   NULL)
-};
+static DEFINE_RUNTIME_DEV_PM_OPS(exynos7_decon_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,
+		.pm	= pm_ptr(&exynos7_decon_pm_ops),
 		.of_match_table = decon_driver_dt_match,
 	},
 };