[PATCH 02/16] drm/msm/dpu: add formats check for writeback encoder

[Abhinav Kumar]

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

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 284a88060221..6a1f8e34f18a 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
@@ -238,6 +238,7 @@ 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);
@@ -274,6 +275,12 @@ static int dpu_encoder_phys_wb_atomic_check(
                return -EINVAL;
        }
 
+       ret = drm_atomic_helper_check_wb_encoder_state(phys_enc->parent, 
conn_state);
+       if (ret < 0) {
+               DPU_ERROR("invalid pixel format %p4cc\n", &fb->format->format);
+               return ret;
+       }
+
        return 0;
 }
 
-- 
2.40.1