On Mon, Aug 25, 2025 at 10:16:13PM +0800, Yongxing Mou wrote:
> From: Abhinav Kumar <quic_abhin...@quicinc.com>
>
> Add an API dp_display_get_panel() to initialize and return a DP
> panel to be used by DP MST module. Since some of the fields of
> DP panel are private, dp_display module needs to initialize these
> parts and return the panel back.
>
> Signed-off-by: Abhinav Kumar <quic_abhin...@quicinc.com>
> Signed-off-by: Yongxing Mou <yongxing....@oss.qualcomm.com>
> ---
> drivers/gpu/drm/msm/dp/dp_display.c | 23 +++++++++++++++++++++++
> drivers/gpu/drm/msm/dp/dp_display.h | 2 ++
> 2 files changed, 25 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
> b/drivers/gpu/drm/msm/dp/dp_display.c
> index
> 84df34306fb557341bea288ea8c13b0c81b11919..abcab3ed43b6da5ef898355cf9b7561cd9fe0404
> 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -632,6 +632,29 @@ static int msm_dp_irq_hpd_handle(struct
> msm_dp_display_private *dp, u32 data)
> return 0;
> }
>
> +struct msm_dp_panel *msm_dp_display_get_panel(struct msm_dp *msm_dp_display)
> +{
> + struct msm_dp_display_private *dp;
> + struct msm_dp_panel *dp_panel;
> +
> + dp = container_of(msm_dp_display, struct msm_dp_display_private,
> msm_dp_display);
> +
> + dp_panel = msm_dp_panel_get(&dp->msm_dp_display.pdev->dev, dp->aux,
> dp->link,
> + dp->link_base, dp->mst2link_base,
> dp->mst3link_base,
> + dp->pixel_base);
> +
> + if (IS_ERR(dp->panel)) {
> + DRM_ERROR("failed to initialize panel\n");
> + return NULL;
> + }
> +
> + memcpy(dp_panel->dpcd, dp->panel->dpcd, DP_RECEIVER_CAP_SIZE);
> + memcpy(&dp_panel->link_info, &dp->panel->link_info,
> + sizeof(dp->panel->link_info));
Both these lines show that link_info and dpcd belong to msm_dp_display
rather than the panel. The panel should only be describing properties of
the particular sink.
> +
> + return dp_panel;
> +}
> +
> static void msm_dp_display_deinit_sub_modules(struct msm_dp_display_private
> *dp)
> {
> msm_dp_audio_put(dp->audio);
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h
> b/drivers/gpu/drm/msm/dp/dp_display.h
> index
> b1ea027438d952c94f3ae80725c92e46c631bdb2..d5889b801d190b6f33b180ead898c1e4ebcbf8f3
> 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.h
> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
> @@ -65,4 +65,6 @@ void msm_dp_display_unprepare(struct msm_dp *dp);
>
> int msm_dp_display_get_active_stream_cnt(struct msm_dp *msm_dp_display);
>
> +struct msm_dp_panel *msm_dp_display_get_panel(struct msm_dp *msm_dp_display);
> +
> #endif /* _DP_DISPLAY_H_ */
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
