Re: [PATCH 1/4] drm: xlnx: zynqmp_dpsub: Set layer mode during creation

Laurent Pinchart
2024-02-28T14:57:14Z

Hi Anatoliy,

Thank you for the patch.

On Mon, Feb 26, 2024 at 08:44:42PM -0800, Anatoliy Klymenko wrote:
> Set layer mode of operation (live or dma-based) during layer creation.
>
> Each DPSUB layer mode of operation is defined by corresponding DT node port
> connection, so it is possible to assign it during layer object creation.
> Previously it was set in layer enable functions, although it is too late
> as setting layer format depends on layer mode, and should be done before
> given layer enabled.
>
> Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
> ---
> drivers/gpu/drm/xlnx/zynqmp_disp.c | 20 ++++++++++++++++----
> drivers/gpu/drm/xlnx/zynqmp_disp.h | 13 +------------
> drivers/gpu/drm/xlnx/zynqmp_dp.c | 2 +-
> drivers/gpu/drm/xlnx/zynqmp_kms.c | 2 +-
> 4 files changed, 19 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index 8a39b3accce5..e6d26ef60e89 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -64,6 +64,16 @@
>
> #define ZYNQMP_DISP_MAX_NUM_SUB_PLANES 3
>
> +/**
> + * enum zynqmp_dpsub_layer_mode - Layer mode
> + * @ZYNQMP_DPSUB_LAYER_NONLIVE: non-live (memory) mode
> + * @ZYNQMP_DPSUB_LAYER_LIVE: live (stream) mode
> + */
> +enum zynqmp_dpsub_layer_mode {
> + ZYNQMP_DPSUB_LAYER_NONLIVE,
> + ZYNQMP_DPSUB_LAYER_LIVE,
> +};
> +
> /**
> * struct zynqmp_disp_format - Display subsystem format information
> * @drm_fmt: DRM format (4CC)
> @@ -902,15 +912,12 @@ u32 *zynqmp_disp_layer_drm_formats(struct zynqmp_disp_layer *layer,
> /**
> * zynqmp_disp_layer_enable - Enable a layer
> * @layer: The layer
> - * @mode: Operating mode of layer
> *
> * Enable the @layer in the audio/video buffer manager and the blender. DMA
> * channels are started separately by zynqmp_disp_layer_update().
> */
> -void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer,
> - enum zynqmp_dpsub_layer_mode mode)
> +void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer)
> {
> - layer->mode = mode;
> zynqmp_disp_avbuf_enable_video(layer->disp, layer);
> zynqmp_disp_blend_layer_enable(layer->disp, layer);
> }
> @@ -1134,6 +1141,11 @@ static int zynqmp_disp_create_layers(struct zynqmp_disp *disp)
> layer->id = i;
> layer->disp = disp;
> layer->info = &layer_info[i];
> + /* For now assume dpsub works in either live or non-live mode for both layers.
> + * Hybrid mode is not supported yet.
> + */

/*
* For now assume dpsub works in either live or non-live mode
* for both layers. Hybrid mode is not supported yet.
*/

Sounds like a reasonable restriction for now.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> + layer->mode = disp->dpsub->dma_enabled ? ZYNQMP_DPSUB_LAYER_NONLIVE
> + : ZYNQMP_DPSUB_LAYER_LIVE;
>
> ret = zynqmp_disp_layer_request_dma(disp, layer);
> if (ret)
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.h b/drivers/gpu/drm/xlnx/zynqmp_disp.h
> index 123cffac08be..9b8b202224d9 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.h
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.h
> @@ -42,16 +42,6 @@ enum zynqmp_dpsub_layer_id {
> ZYNQMP_DPSUB_LAYER_GFX,
> };
>
> -/**
> - * enum zynqmp_dpsub_layer_mode - Layer mode
> - * @ZYNQMP_DPSUB_LAYER_NONLIVE: non-live (memory) mode
> - * @ZYNQMP_DPSUB_LAYER_LIVE: live (stream) mode
> - */
> -enum zynqmp_dpsub_layer_mode {
> - ZYNQMP_DPSUB_LAYER_NONLIVE,
> - ZYNQMP_DPSUB_LAYER_LIVE,
> -};
> -
> void zynqmp_disp_enable(struct zynqmp_disp *disp);
> void zynqmp_disp_disable(struct zynqmp_disp *disp);
> int zynqmp_disp_setup_clock(struct zynqmp_disp *disp,
> @@ -62,8 +52,7 @@ void zynqmp_disp_blend_set_global_alpha(struct zynqmp_disp *disp,
>
> u32 *zynqmp_disp_layer_drm_formats(struct zynqmp_disp_layer *layer,
> unsigned int *num_formats);
> -void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer,
> - enum zynqmp_dpsub_layer_mode mode);
> +void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer);
> void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer);
> void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
> const struct drm_format_info *info);
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
> index 1846c4971fd8..04b6bcac3b07 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
> @@ -1295,7 +1295,7 @@ static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp,
> /* TODO: Make the format configurable. */
> info = drm_format_info(DRM_FORMAT_YUV422);
> zynqmp_disp_layer_set_format(layer, info);
> - zynqmp_disp_layer_enable(layer, ZYNQMP_DPSUB_LAYER_LIVE);
> + zynqmp_disp_layer_enable(layer);
>
> if (layer_id == ZYNQMP_DPSUB_LAYER_GFX)
> zynqmp_disp_blend_set_global_alpha(dp->dpsub->disp, true, 255);
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c
> index db3bb4afbfc4..43bf416b33d5 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_kms.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c
> @@ -122,7 +122,7 @@ static void zynqmp_dpsub_plane_atomic_update(struct drm_plane *plane,
>
> /* Enable or re-enable the plane if the format has changed. */
> if (format_changed)
> - zynqmp_disp_layer_enable(layer, ZYNQMP_DPSUB_LAYER_NONLIVE);
> + zynqmp_disp_layer_enable(layer);
> }
>
> static const struct drm_plane_helper_funcs zynqmp_dpsub_plane_helper_funcs = {
>

--
Regards,

Laurent Pinchart