drm/exynos: remove unnecessary checking to support iommu

Already drm_iommu_attach_device and drm_iommu_detach_device check
whether support iommu internally, so we don't have to call
is_drm_iommu_supported before call them.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index 8b1225f..ba43437 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -514,8 +514,7 @@ static void decon_unbind(struct device *dev, struct device *master, void *data)
        decon_disable(ctx->crtc);
 
        /* 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);
+       drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
 }
 
 static const struct component_ops decon_component_ops = {

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
index 362532a..2c29635 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -136,8 +136,7 @@ static int decon_ctx_initialize(struct decon_context *ctx,
 static void decon_ctx_remove(struct decon_context *ctx)
 {
        /* 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);
+       drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
 }
 
 static u32 decon_calc_clkdiv(struct decon_context *ctx,

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 794e56c..300730c 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -348,13 +348,6 @@ static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
        pm_runtime_put(ctx->dev);
 }
 
-static void fimd_iommu_detach_devices(struct fimd_context *ctx)
-{
-       /* 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);
-}
-
 static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
                const struct drm_display_mode *mode)
 {
@@ -978,7 +971,7 @@ static void fimd_unbind(struct device *dev, struct device *master,
 
        fimd_disable(ctx->crtc);
 
-       fimd_iommu_detach_devices(ctx);
+       drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
 
        if (ctx->display)
                exynos_dpi_remove(ctx->display);

diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index 81a2508..ba00839 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -1319,9 +1319,6 @@ static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
                return ret;
        }
 
-       if (!is_drm_iommu_supported(drm_dev))
-               return 0;
-
        ret = drm_iommu_attach_device(drm_dev, dev);
        if (ret < 0) {
                dev_err(dev, "failed to enable iommu.\n");
@@ -1334,9 +1331,6 @@ static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
 
 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
 {
-       if (!is_drm_iommu_supported(drm_dev))
-               return;
-
        drm_iommu_detach_device(drm_dev, dev);
 }
 

diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
index d4ec746..4c2ec1b 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
@@ -87,10 +87,8 @@ int drm_iommu_attach_device(struct drm_device *drm_dev,
        struct device *dev = drm_dev->dev;
        int ret;
 
-       if (!dev->archdata.mapping) {
-               DRM_ERROR("iommu_mapping is null.\n");
-               return -EFAULT;
-       }
+       if (!dev->archdata.mapping)
+               return 0;
 
        subdrv_dev->dma_parms = devm_kzalloc(subdrv_dev,
                                        sizeof(*subdrv_dev->dma_parms),
@@ -148,13 +146,10 @@ void drm_iommu_detach_device(struct drm_device *drm_dev,
 int drm_iommu_attach_device_if_possible(struct exynos_drm_crtc *exynos_crtc,
                        struct drm_device *drm_dev, struct device *subdrv_dev)
 {
-       int ret = 0;
-
        if (is_drm_iommu_supported(drm_dev)) {
                if (exynos_crtc->ops->clear_channels)
                        exynos_crtc->ops->clear_channels(exynos_crtc);
-               return drm_iommu_attach_device(drm_dev, subdrv_dev);
        }
 
-       return ret;
+       return drm_iommu_attach_device(drm_dev, subdrv_dev);
 }

diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index 67e5451..67d2423 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -1622,12 +1622,10 @@ static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
                INIT_LIST_HEAD(&ippdrv->cmd_list);
                mutex_init(&ippdrv->cmd_lock);
 
-               if (is_drm_iommu_supported(drm_dev)) {
-                       ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
-                       if (ret) {
-                               DRM_ERROR("failed to activate iommu\n");
-                               goto err;
-                       }
+               ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
+               if (ret) {
+                       DRM_ERROR("failed to activate iommu\n");
+                       goto err;
                }
        }
 
@@ -1637,8 +1635,7 @@ err:
        /* get ipp driver entry */
        list_for_each_entry_continue_reverse(ippdrv, &exynos_drm_ippdrv_list,
                                                drv_list) {
-               if (is_drm_iommu_supported(drm_dev))
-                       drm_iommu_detach_device(drm_dev, ippdrv->dev);
+               drm_iommu_detach_device(drm_dev, ippdrv->dev);
 
                ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
                                ippdrv->prop_list.ipp_id);
@@ -1654,8 +1651,7 @@ static void ipp_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
 
        /* get ipp driver entry */
        list_for_each_entry_safe(ippdrv, t, &exynos_drm_ippdrv_list, drv_list) {
-               if (is_drm_iommu_supported(drm_dev))
-                       drm_iommu_detach_device(drm_dev, ippdrv->dev);
+               drm_iommu_detach_device(drm_dev, ippdrv->dev);
 
                ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
                                ippdrv->prop_list.ipp_id);

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 4706b56..b7e438f 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -891,8 +891,7 @@ static int mixer_initialize(struct mixer_context *mixer_ctx,
 
 static void mixer_ctx_remove(struct mixer_context *mixer_ctx)
 {
-       if (is_drm_iommu_supported(mixer_ctx->drm_dev))
-               drm_iommu_detach_device(mixer_ctx->drm_dev, mixer_ctx->dev);
+       drm_iommu_detach_device(mixer_ctx->drm_dev, mixer_ctx->dev);
 }
 
 static int mixer_enable_vblank(struct exynos_drm_crtc *crtc)