From: Kumar, Mahesh Date: Thu, 3 Sep 2015 10:47:08 +0000 (+0530) Subject: drm/i915/skl: Avoid using un-initialized bits_per_pixel X-Git-Tag: KARO-TX6UL-2015-11-03~85^2~19^2~27 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=395ab7541a0e141ffbde127b534e44f28d39a050;p=karo-tx-linux.git drm/i915/skl: Avoid using un-initialized bits_per_pixel 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 Cc: Konduru, Chandra Reviewed-by: Sonika Jindal Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index ea4966144650..1b90f03f7025 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];