[PATCH 1/2] drm/exynos: fimd: Remove drm_dev pointer from fimd_context

[PATCH 1/2] drm/exynos: fimd: Remove drm_dev pointer from fimd_context

[Ajay Kumar]

ctx->drm_dev is unnecessary since it can be easily
accessed via ctx->manager->drm_dev, cleaning it up.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c |   25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index e5810d1..122c851 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -159,7 +159,6 @@ struct fimd_win_data {
 struct fimd_context {
 	struct exynos_drm_manager	manager;
 	struct device			*dev;
-	struct drm_device		*drm_dev;
 	struct clk			*bus_clk;
 	struct clk			*lcd_clk;
 	void __iomem			*regs;
@@ -298,17 +297,17 @@ static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
 	struct exynos_drm_private *priv;
 	priv = drm_dev->dev_private;
 
-	mgr->drm_dev = ctx->drm_dev = drm_dev;
+	mgr->drm_dev = drm_dev;
 	mgr->pipe = ctx->pipe = priv->pipe++;
 
 	/* attach this sub driver to iommu mapping if supported. */
-	if (is_drm_iommu_supported(ctx->drm_dev)) {
+	if (is_drm_iommu_supported(mgr->drm_dev)) {
 		/*
 		 * If any channel is already active, iommu will throw
 		 * a PAGE FAULT when enabled. So clear any channel if enabled.
 		 */
 		fimd_clear_channel(mgr);
-		drm_iommu_attach_device(ctx->drm_dev, ctx->dev);
+		drm_iommu_attach_device(mgr->drm_dev, ctx->dev);
 	}
 
 	return 0;
@@ -319,8 +318,8 @@ static void fimd_mgr_remove(struct exynos_drm_manager *mgr)
 	struct fimd_context *ctx = mgr_to_fimd(mgr);
 
 	/* detach this sub driver from iommu mapping if supported. */
-	if (is_drm_iommu_supported(ctx->drm_dev))
-		drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
+	if (is_drm_iommu_supported(mgr->drm_dev))
+		drm_iommu_detach_device(mgr->drm_dev, ctx->dev);
 }
 
 static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
@@ -1001,7 +1000,7 @@ static void fimd_te_handler(struct exynos_drm_manager *mgr)
 	struct fimd_context *ctx = mgr_to_fimd(mgr);
 
 	/* Checks the crtc is detached already from encoder */
-	if (ctx->pipe < 0 || !ctx->drm_dev)
+	if (ctx->pipe < 0 || !mgr->drm_dev)
 		return;
 
 	/*
@@ -1018,7 +1017,7 @@ static void fimd_te_handler(struct exynos_drm_manager *mgr)
 	}
 
 	if (test_bit(0, &ctx->irq_flags))
-		drm_handle_vblank(ctx->drm_dev, ctx->pipe);
+		drm_handle_vblank(mgr->drm_dev, ctx->pipe);
 }
 
 static struct exynos_drm_manager_ops fimd_manager_ops = {
@@ -1047,17 +1046,19 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 		writel(clear_bit, ctx->regs + VIDINTCON1);
 
 	/* check the crtc is detached already from encoder */
-	if (ctx->pipe < 0 || !ctx->drm_dev)
+	if (ctx->pipe < 0 || !ctx->manager.drm_dev)
 		goto out;
 
 	if (ctx->i80_if) {
-		exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
+		exynos_drm_crtc_finish_pageflip(ctx->manager.drm_dev,
+								ctx->pipe);
 
 		/* Exits triggering mode */
 		atomic_set(&ctx->triggering, 0);
 	} else {
-		drm_handle_vblank(ctx->drm_dev, ctx->pipe);
-		exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
+		drm_handle_vblank(ctx->manager.drm_dev, ctx->pipe);
+		exynos_drm_crtc_finish_pageflip(ctx->manager.drm_dev,
+								ctx->pipe);
 
 		/* set wait vsync event to zero and wake up queue. */
 		if (atomic_read(&ctx->wait_vsync_event)) {
-- 
1.7.9.5

[PATCH 2/2] drm/exynos: fimd: check error status for drm_iommu_attach_device

[Ajay Kumar]

check error status for drm_iommu_attach_device() and make sure
it propagates till the caller.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c |   17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 122c851..528420c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -295,6 +295,8 @@ static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
 {
 	struct fimd_context *ctx = mgr_to_fimd(mgr);
 	struct exynos_drm_private *priv;
+	int ret;
+
 	priv = drm_dev->dev_private;
 
 	mgr->drm_dev = drm_dev;
@@ -307,7 +309,12 @@ static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
 		 * a PAGE FAULT when enabled. So clear any channel if enabled.
 		 */
 		fimd_clear_channel(mgr);
-		drm_iommu_attach_device(mgr->drm_dev, ctx->dev);
+
+		ret = drm_iommu_attach_device(mgr->drm_dev, ctx->dev);
+		if (ret) {
+			DRM_ERROR("drm_iommu_attach failed.\n");
+			return ret;
+		}
 	}
 
 	return 0;
@@ -1075,8 +1082,14 @@ static int fimd_bind(struct device *dev, struct device *master, void *data)
 {
 	struct fimd_context *ctx = dev_get_drvdata(dev);
 	struct drm_device *drm_dev = data;
+	int ret;
+
+	ret = fimd_mgr_initialize(&ctx->manager, drm_dev);
+	if (ret) {
+		DRM_ERROR("fimd_mgr_initialize failed.\n");
+		return ret;
+	}
 
-	fimd_mgr_initialize(&ctx->manager, drm_dev);
 	exynos_drm_crtc_create(&ctx->manager);
 	if (ctx->display)
 		exynos_drm_create_enc_conn(drm_dev, ctx->display);
-- 
1.7.9.5