From: Yongqiang Niu <yongqiang....@mediatek.com>
Fix external display vblank timeout issue
Signed-off-by: Yongqiang Niu <yongqiang....@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 14 +++++++++-----
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 6 ++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 14 ++++++++++++++
3 files changed, 29 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
b/drivers/gpu/drm/mediatek/mtk_dpi.c
index be6d95c..38cabbe 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -387,8 +387,12 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
{
int ret;
- if (++dpi->refcount != 1)
+ if (++dpi->refcount != 1) {
+ dev_warn(dpi->dev, "%s refcount: %d\n", __func__,
dpi->refcount);
return 0;
+ }
+
+ DRM_DEBUG_DRIVER("%s refcount %d\n", __func__, dpi->refcount);
ret = clk_prepare_enable(dpi->engine_clk);
if (ret) {
@@ -563,14 +567,14 @@ static int mtk_dpi_atomic_check(struct drm_encoder
*encoder,
.atomic_check = mtk_dpi_atomic_check,
};
-static void mtk_dpi_start(struct mtk_ddp_comp *comp)
+static void mtk_dpi_prepare(struct mtk_ddp_comp *comp)
{
struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
mtk_dpi_power_on(dpi);
}
-static void mtk_dpi_stop(struct mtk_ddp_comp *comp)
+static void mtk_dpi_unprepare(struct mtk_ddp_comp *comp)
{
struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
@@ -578,8 +582,8 @@ static void mtk_dpi_stop(struct mtk_ddp_comp *comp)
}
static const struct mtk_ddp_comp_funcs mtk_dpi_funcs = {
- .start = mtk_dpi_start,
- .stop = mtk_dpi_stop,
+ .prepare = mtk_dpi_prepare,
+ .unprepare = mtk_dpi_unprepare,
};
static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 7eca02f..a6d3d97 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -345,6 +345,9 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc
*mtk_crtc)
return ret;
}
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ mtk_ddp_comp_prepare(mtk_crtc->ddp_comp[i]);
+
ret = mtk_disp_mutex_prepare(mtk_crtc->mutex);
if (ret < 0) {
DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
@@ -434,6 +437,9 @@ static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc
*mtk_crtc)
mtk_crtc_ddp_clk_disable(mtk_crtc);
mtk_disp_mutex_unprepare(mtk_crtc->mutex);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ mtk_ddp_comp_unprepare(mtk_crtc->ddp_comp[i]);
+
pm_runtime_put(drm->dev);
if (crtc->state->event && !crtc->state->active) {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 5b0a3d4..097b90d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -78,6 +78,8 @@ struct mtk_ddp_comp_funcs {
void (*stop)(struct mtk_ddp_comp *comp);
void (*enable_vblank)(struct mtk_ddp_comp *comp, struct drm_crtc *crtc);
void (*disable_vblank)(struct mtk_ddp_comp *comp);
+ void (*prepare)(struct mtk_ddp_comp *comp);
+ void (*unprepare)(struct mtk_ddp_comp *comp);
unsigned int (*supported_rotations)(struct mtk_ddp_comp *comp);
unsigned int (*layer_nr)(struct mtk_ddp_comp *comp);
void (*layer_on)(struct mtk_ddp_comp *comp, unsigned int idx,
@@ -117,6 +119,18 @@ static inline void mtk_ddp_comp_config(struct mtk_ddp_comp
*comp,
comp->funcs->config(comp, w, h, vrefresh, bpc, cmdq_pkt);
}
+static inline void mtk_ddp_comp_prepare(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->prepare)
+ comp->funcs->prepare(comp);
+}
+
+static inline void mtk_ddp_comp_unprepare(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->unprepare)
+ comp->funcs->unprepare(comp);
+}
+
static inline void mtk_ddp_comp_start(struct mtk_ddp_comp *comp)
{
if (comp->funcs && comp->funcs->start)
--
1.8.1.1.dirty
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