[PATCH v3 01/15] drm/msm/dpu: add formats check for writeback encoder

[Abhinav Kumar]

In preparation for adding more formats to dpu writeback add
format validation to it to fail any unsupported formats.

changes in v3:
        - rebase on top of msm-next
        - replace drm_atomic_helper_check_wb_encoder_state() with
          drm_atomic_helper_check_wb_connector_state() due to the
          rebase

changes in v2:
        - correct some grammar in the commit text

Fixes: d7d0e73f7de3 ("drm/msm/dpu: introduce the dpu_encoder_phys_* for 
writeback")
Signed-off-by: Abhinav Kumar <quic_abhin...@quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
index bb94909caa25..425415d45ec1 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
@@ -272,6 +272,7 @@ static int dpu_encoder_phys_wb_atomic_check(
 {
        struct drm_framebuffer *fb;
        const struct drm_display_mode *mode = &crtc_state->mode;
+       int ret;
 
        DPU_DEBUG("[atomic_check:%d, \"%s\",%d,%d]\n",
                        phys_enc->hw_wb->idx, mode->name, mode->hdisplay, 
mode->vdisplay);
@@ -308,6 +309,12 @@ static int dpu_encoder_phys_wb_atomic_check(
                return -EINVAL;
        }
 
+       ret = drm_atomic_helper_check_wb_connector_state(conn_state->connector, 
conn_state->state);
+       if (ret < 0) {
+               DPU_ERROR("invalid pixel format %p4cc\n", &fb->format->format);
+               return ret;
+       }
+
        return 0;
 }
 
-- 
2.40.1