Don't rely on fb->bits_per_pixel as intel_framebuffer_init is not
filling bits_per_pixel field of fb-struct for YUV pixel format.
This leads to divide by zero error during watermark calculation.
Signed-off-by: Kumar, Mahesh <mahesh1.kumar@xxxxxxxxx>
Cc: Konduru, Chandra <chandra.konduru@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ea49661..1b90f03 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3170,7 +3170,8 @@ static void skl_compute_wm_pipe_parameters(struct drm_crtc *crtc,
if (fb) {
p->plane[0].enabled = true;
p->plane[0].bytes_per_pixel = fb->pixel_format == DRM_FORMAT_NV12 ?
- drm_format_plane_cpp(fb->pixel_format, 1) : fb->bits_per_pixel / 8;
+ drm_format_plane_cpp(fb->pixel_format, 1) :
+ drm_format_plane_cpp(fb->pixel_format, 0);
p->plane[0].y_bytes_per_pixel = fb->pixel_format == DRM_FORMAT_NV12 ?
drm_format_plane_cpp(fb->pixel_format, 0) : 0;
p->plane[0].tiling = fb->modifier[0];
--
1.9.1
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