Re: [PATCH RFC v4 7/7] drm/msm/dpu: Use DRM solid_fill property

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On 6/29/2023 5:59 PM, Dmitry Baryshkov wrote:
On 30/06/2023 03:25, Jessica Zhang wrote:
Drop DPU_PLANE_COLOR_FILL_FLAG and check the DRM solid_fill property to
determine if the plane is solid fill. In addition drop the DPU plane
color_fill field as we can now use drm_plane_state.solid_fill instead,
and pass in drm_plane_state.alpha to _dpu_plane_color_fill_pipe() to
allow userspace to configure the alpha value for the solid fill color.

Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>

Minor suggestion below.

---
  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 21 +++++++++++++++------
  1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 4476722f03bb..11d4fb771a1f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -42,7 +42,6 @@
  #define SHARP_SMOOTH_THR_DEFAULT    8
  #define SHARP_NOISE_THR_DEFAULT    2
-#define DPU_PLANE_COLOR_FILL_FLAG    BIT(31)
  #define DPU_ZPOS_MAX 255
  /*
@@ -82,7 +81,6 @@ struct dpu_plane {
      enum dpu_sspp pipe;
-    uint32_t color_fill;
      bool is_error;
      bool is_rt_pipe;
      const struct dpu_mdss_cfg *catalog;
@@ -606,6 +604,17 @@ static void _dpu_plane_color_fill_pipe(struct dpu_plane_state *pstate,       _dpu_plane_setup_scaler(pipe, fmt, true, &pipe_cfg, pstate->rotation);
  }
+static uint32_t _dpu_plane_get_fill_color(struct drm_solid_fill solid_fill)

Please consider accepting drm_plane_state instead and handling alpha here. Then _dpu_color_fill can accept rgba colour instead of separate RGB and alpha values.

Hi Dmitry,

Do you mean adding a patch to refactor _dpu_plane_color_fill() to accept an RGBA8888 color?

Since, currently, the `color` parameter gets truncated to a BGR888 value and OR'd with the `alpha` parameter [1].

Thanks,

Jessica Zhang

[1] https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c#L682


+{
+    uint32_t ret = 0;
+
+    ret |= ((uint8_t) solid_fill.b) << 16;
+    ret |= ((uint8_t) solid_fill.g) << 8;
+    ret |= ((uint8_t) solid_fill.r);
+
+    return ret;
+}
+
  /**
   * _dpu_plane_color_fill - enables color fill on plane
   * @pdpu:   Pointer to DPU plane object
@@ -977,9 +986,9 @@ void dpu_plane_flush(struct drm_plane *plane)
      if (pdpu->is_error)
          /* force white frame with 100% alpha pipe output on error */
          _dpu_plane_color_fill(pdpu, 0xFFFFFF, 0xFF);
-    else if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG)
-        /* force 100% alpha */
-        _dpu_plane_color_fill(pdpu, pdpu->color_fill, 0xFF);
+    else if (drm_plane_solid_fill_enabled(plane->state))
+        _dpu_plane_color_fill(pdpu, _dpu_plane_get_fill_color(plane->state->solid_fill),
+                plane->state->alpha);
      else {
          dpu_plane_flush_csc(pdpu, &pstate->pipe);
          dpu_plane_flush_csc(pdpu, &pstate->r_pipe);
@@ -1024,7 +1033,7 @@ static void dpu_plane_sspp_update_pipe(struct drm_plane *plane,
      }
      /* override for color fill */
-    if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG) {
+    if (drm_plane_solid_fill_enabled(plane->state)) {
          _dpu_plane_set_qos_ctrl(plane, pipe, false);
          /* skip remaining processing on color fill */


--
With best wishes
Dmitry




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