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authorInki Dae <inki.dae@samsung.com>2012-10-19 17:37:35 +0900
committerInki Dae <inki.dae@samsung.com>2012-12-04 14:45:53 +0900
commit1055b39facd1bf8f84031a07385f84b46a20540f (patch)
treed139201e9880349f39f6435d6cc24cafdbea7a3c /drivers/gpu/drm/exynos
parentbcc5cd1c5fad9b4471aafff0d74d9d0fcde1c27d (diff)
drm/exynos: add iommu support for hdmi driver
Changelog v2: move iommu support feature to mixer side. And below is Prathyush's comment. According to the new IOMMU framework for exynos sysmmus, the owner of the sysmmu-tv is mixer (which is the actual device that does DMA) and not hdmi. The mmu-master in sysmmu-tv node is set as below in exynos5250.dtsi sysmmu-tv { - mmu-master = <&mixer>; }; Changelog v1: The iommu will be enabled when hdmi sub driver is probed and will be disabled when removed. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'drivers/gpu/drm/exynos')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_hdmi.c15
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_hdmi.h1
-rw-r--r--drivers/gpu/drm/exynos/exynos_hdmi.c2
-rw-r--r--drivers/gpu/drm/exynos/exynos_mixer.c23
4 files changed, 40 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_hdmi.c b/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
index c3b9e2b45185..2d11e70b601a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
@@ -346,9 +346,23 @@ static int hdmi_subdrv_probe(struct drm_device *drm_dev,
ctx->hdmi_ctx->drm_dev = drm_dev;
ctx->mixer_ctx->drm_dev = drm_dev;
+ if (mixer_ops->iommu_on)
+ mixer_ops->iommu_on(ctx->mixer_ctx->ctx, true);
+
return 0;
}
+static void hdmi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
+{
+ struct drm_hdmi_context *ctx;
+ struct exynos_drm_subdrv *subdrv = to_subdrv(dev);
+
+ ctx = get_ctx_from_subdrv(subdrv);
+
+ if (mixer_ops->iommu_on)
+ mixer_ops->iommu_on(ctx->mixer_ctx->ctx, false);
+}
+
static int __devinit exynos_drm_hdmi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -368,6 +382,7 @@ static int __devinit exynos_drm_hdmi_probe(struct platform_device *pdev)
subdrv->dev = dev;
subdrv->manager = &hdmi_manager;
subdrv->probe = hdmi_subdrv_probe;
+ subdrv->remove = hdmi_subdrv_remove;
platform_set_drvdata(pdev, subdrv);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_hdmi.h b/drivers/gpu/drm/exynos/exynos_drm_hdmi.h
index 2da5ffd3a059..54b522353e48 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_hdmi.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_hdmi.h
@@ -62,6 +62,7 @@ struct exynos_hdmi_ops {
struct exynos_mixer_ops {
/* manager */
+ int (*iommu_on)(void *ctx, bool enable);
int (*enable_vblank)(void *ctx, int pipe);
void (*disable_vblank)(void *ctx);
void (*dpms)(void *ctx, int mode);
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 2c115f8a62a3..c73f43874944 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -74,6 +74,7 @@ struct hdmi_context {
struct mutex hdmi_mutex;
void __iomem *regs;
+ void *parent_ctx;
int external_irq;
int internal_irq;
@@ -84,7 +85,6 @@ struct hdmi_context {
int cur_conf;
struct hdmi_resources res;
- void *parent_ctx;
int hpd_gpio;
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 0d3ed282376c..50100cfddf4e 100644
--- 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;