drm/exynos: add iommu support for hdmi driver

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / exynos / exynos_mixer.c

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 0d3ed282376ce5118b0f18bf01ff36c801b839e4..50100cfddf4e275adb936ea36f49cc4ad2399fa1 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -36,6 +36,7 @@
 
 #include "exynos_drm_drv.h"
 #include "exynos_drm_hdmi.h"
+#include "exynos_drm_iommu.h"
 
 #define get_mixer_context(dev) platform_get_drvdata(to_platform_device(dev))
 
@@ -80,6 +81,7 @@ enum mixer_version_id {
 
 struct mixer_context {
        struct device           *dev;
+       struct drm_device       *drm_dev;
        int                     pipe;
        bool                    interlace;
        bool                    powered;
@@ -90,6 +92,7 @@ struct mixer_context {
        struct mixer_resources  mixer_res;
        struct hdmi_win_data    win_data[MIXER_WIN_NR];
        enum mixer_version_id   mxr_ver;
+       void                    *parent_ctx;
 };
 
 struct mixer_drv_data {
@@ -665,6 +668,24 @@ static void mixer_win_reset(struct mixer_context *ctx)
        spin_unlock_irqrestore(&res->reg_slock, flags);
 }
 
+static int mixer_iommu_on(void *ctx, bool enable)
+{
+       struct exynos_drm_hdmi_context *drm_hdmi_ctx;
+       struct mixer_context *mdata = ctx;
+       struct drm_device *drm_dev;
+
+       drm_hdmi_ctx = mdata->parent_ctx;
+       drm_dev = drm_hdmi_ctx->drm_dev;
+
+       if (is_drm_iommu_supported(drm_dev)) {
+               if (enable)
+                       return drm_iommu_attach_device(drm_dev, mdata->dev);
+
+               drm_iommu_detach_device(drm_dev, mdata->dev);
+       }
+       return 0;
+}
+
 static void mixer_poweron(struct mixer_context *ctx)
 {
        struct mixer_resources *res = &ctx->mixer_res;
@@ -866,6 +887,7 @@ static void mixer_win_disable(void *ctx, int win)
 
 static struct exynos_mixer_ops mixer_ops = {
        /* manager */
+       .iommu_on               = mixer_iommu_on,
        .enable_vblank          = mixer_enable_vblank,
        .disable_vblank         = mixer_disable_vblank,
        .dpms                   = mixer_dpms,
@@ -1140,6 +1162,7 @@ static int __devinit mixer_probe(struct platform_device *pdev)
        }
 
        ctx->dev = &pdev->dev;
+       ctx->parent_ctx = (void *)drm_hdmi_ctx;
        drm_hdmi_ctx->ctx = (void *)ctx;
        ctx->vp_enabled = drv->is_vp_enabled;
        ctx->mxr_ver = drv->version;