[PATCH v24 4/7] drm/mediatek: add dma dev get function

Nancy.Lin
2022-07-11T10:44:06Z

This is a preparation for adding support for the ovl_adaptor sub driver
Ovl_adaptor is a DRM sub driver, which doesn't have dma dev. Add
dma_dev_get function for getting representative dma dev in ovl_adaptor.

Signed-off-by: Nancy.Lin <nancy.lin@mediatek.com>
Reviewed-by: AngeloGioachino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 15 +++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 8 ++++++++
3 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 42cc7052b050..5251bf070e6e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -59,6 +59,7 @@ struct mtk_drm_crtc {
#endif

struct device *mmsys_dev;
+ struct device *dma_dev;
struct mtk_mutex *mutex;
unsigned int ddp_comp_nr;
struct mtk_ddp_comp **ddp_comp;
@@ -866,6 +867,13 @@ static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
return 0;
}

+struct device *mtk_drm_crtc_dma_dev_get(struct drm_crtc *crtc)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+
+ return mtk_crtc->dma_dev;
+}
+
int mtk_drm_crtc_create(struct drm_device *drm_dev,
const enum mtk_ddp_comp_id *path, unsigned int path_len)
{
@@ -954,6 +962,13 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
return ret;
}

+ /*
+ * Default to use the first component as the dma dev.
+ * In the case of ovl_adaptor sub driver, it needs to use the
+ * dma_dev_get function to get representative dma dev.
+ */
+ mtk_crtc->dma_dev = mtk_ddp_comp_dma_dev_get(&priv->ddp_comp[path[0]]);
+
ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
if (ret < 0)
return ret;
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
index cb9a36c48d4f..f5a6e80c5265 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -22,5 +22,6 @@ int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
struct mtk_plane_state *state);
void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
struct drm_atomic_state *plane_state);
+struct device *mtk_drm_crtc_dma_dev_get(struct drm_crtc *crtc);

#endif /* MTK_DRM_CRTC_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index a43d82c12a9a..b04e656cb251 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -70,6 +70,7 @@ struct mtk_ddp_comp_funcs {
void (*bgclr_in_off)(struct device *dev);
void (*ctm_set)(struct device *dev,
struct drm_crtc_state *state);
+ struct device * (*dma_dev_get)(struct device *dev);
};

struct mtk_ddp_comp {
@@ -202,6 +203,13 @@ static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
comp->funcs->ctm_set(comp->dev, state);
}

+static inline struct device *mtk_ddp_comp_dma_dev_get(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->dma_dev_get)
+ return comp->funcs->dma_dev_get(comp->dev);
+ return comp->dev;
+}
+
int mtk_ddp_comp_get_id(struct device_node *node,
enum mtk_ddp_comp_type comp_type);
unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
--
2.18.0