On Mon, Jun 09, 2025 at 08:21:52PM +0800, Yongxing Mou wrote:
> From: Abhinav Kumar <[email protected]>
>
> Initiliaze a DPMST encoder for each MST capable DP controller
> and the number of encoders it supports depends on the number
> of streams it supports.
>
> Signed-off-by: Abhinav Kumar <[email protected]>
> Signed-off-by: Yongxing Mou <[email protected]>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 2 ++
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 23 ++++++++++++++++++++++-
> drivers/gpu/drm/msm/dp/dp_display.c | 14 ++++++++++++++
Please don't mix DP and DPU changes in a single patch.
> drivers/gpu/drm/msm/msm_drv.h | 13 +++++++++++++
> 4 files changed, 51 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> index
> ca1ca2e51d7ead0eb34b27f3168e6bb06a71a11a..2eb4c39b111c1d8622e09e78ffafef017e28bbf6
> 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> @@ -28,6 +28,7 @@
> * @h_tile_instance: Controller instance used per tile. Number of
> elements is
> * based on num_of_h_tiles
> * @is_cmd_mode Boolean to indicate if the CMD mode is requested
> + * @stream_id stream id for which the interface needs to be
> acquired
> * @vsync_source: Source of the TE signal for DSI CMD devices
> */
> struct msm_display_info {
> @@ -35,6 +36,7 @@ struct msm_display_info {
> uint32_t num_of_h_tiles;
> uint32_t h_tile_instance[MAX_H_TILES_PER_DISPLAY];
> bool is_cmd_mode;
> + int stream_id;
> enum dpu_vsync_source vsync_source;
> };
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index
> 1fd82b6747e9058ce11dc2620729921492d5ebdd..45fedf7e74e9c6dfed4bde57eb675e3dd1762fc7
> 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -652,7 +652,8 @@ static int _dpu_kms_initialize_displayport(struct
> drm_device *dev,
> struct msm_display_info info;
> bool yuv_supported;
> int rc;
> - int i;
> + int i, stream_id;
> + int stream_cnt;
>
> for (i = 0; i < ARRAY_SIZE(priv->dp); i++) {
> if (!priv->dp[i])
> @@ -675,6 +676,26 @@ static int _dpu_kms_initialize_displayport(struct
> drm_device *dev,
> DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc);
> return rc;
> }
> +
> + stream_cnt = msm_dp_get_mst_max_stream(priv->dp[i]);
> +
> + if (stream_cnt > 1) {
> + for (stream_id = 0; stream_id < stream_cnt;
> stream_id++) {
> + info.stream_id = stream_id;
> + encoder = dpu_encoder_init(dev,
> DRM_MODE_ENCODER_DPMST, &info);
> + if (IS_ERR(encoder)) {
> + DPU_ERROR("encoder init failed for dp
> mst display\n");
> + return PTR_ERR(encoder);
> + }
> +
> + rc = msm_dp_mst_bridge_init(priv->dp[i],
> encoder);
> + if (rc) {
> + DPU_ERROR("dp mst bridge %d init
> failed, %d\n",
> + stream_id, rc);
> + continue;
> + }
> + }
> + }
> }
>
> return 0;
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
> b/drivers/gpu/drm/msm/dp/dp_display.c
> index
> 9dbcf4553cad70c9e3722160a87403fc815765d7..ab1ad0cb6427eb4f86ee8ac6c76788b1a78892a8
> 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1417,6 +1417,20 @@ static int msm_dp_display_get_connector_type(struct
> platform_device *pdev,
> return connector_type;
> }
>
> +int msm_dp_get_mst_max_stream(struct msm_dp *dp_display)
> +{
> + struct msm_dp_display_private *dp_priv;
> +
> + dp_priv = container_of(dp_display, struct msm_dp_display_private,
> msm_dp_display);
> +
> + return dp_priv->max_stream;
> +}
> +
> +int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_encoder
> *encoder)
> +{
> + return msm_dp_mst_drm_bridge_init(dp_display, encoder);
What's the point in this oneliner?
> +}
> +
> static int msm_dp_display_probe(struct platform_device *pdev)
> {
> int rc = 0;
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index
> a65077855201746c37ee742364b61116565f3794..dd403107b640ee5ef333d2773b52e38e3869155f
> 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -372,6 +372,9 @@ bool msm_dp_needs_periph_flush(const struct msm_dp
> *dp_display,
> const struct drm_display_mode *mode);
> bool msm_dp_wide_bus_available(const struct msm_dp *dp_display);
>
> +int msm_dp_get_mst_max_stream(struct msm_dp *dp_display);
> +int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_encoder
> *encoder);
> +
> #else
> static inline int __init msm_dp_register(void)
> {
> @@ -388,6 +391,16 @@ static inline int msm_dp_modeset_init(struct msm_dp
> *dp_display,
> return -EINVAL;
> }
>
> +static inline int msm_dp_get_mst_max_stream(struct msm_dp *dp_display)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct
> drm_encoder *encoder)
> +{
> + return -EINVAL;
> +}
> +
> static inline void msm_dp_snapshot(struct msm_disp_state *disp_state, struct
> msm_dp *dp_display)
> {
> }
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
