From: Dave Airlie Date: Tue, 20 Dec 2011 11:44:30 +0000 (+0000) Subject: drm/radeon/kms: don't use 0 bpc for adjusting hdmi clock X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=06e4cd64174b48345cbd99179b780a2bf4f96ab6;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/radeon/kms: don't use 0 bpc for adjusting hdmi clock If the bpc is set from the connector is 0, we then use it later to adjust in a special case the HDMI pixel clock, however if the bpc is 0, we end up passing a 0 pixel clock into the code. I'm not sure if this is the correct answer or if we should avoid the HDMI clock adjustment for 0 values. This fixes a divide by 0 on my Llano system with a HDMI monitor and hdmi audio enabled. Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 457bbad3cbf9..0fda830ef806 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -554,7 +554,7 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, if (encoder->crtc == crtc) { radeon_encoder = to_radeon_encoder(encoder); connector = radeon_get_connector_for_encoder(encoder); - if (connector) + if (connector && connector->display_info.bpc) bpc = connector->display_info.bpc; encoder_mode = atombios_get_encoder_mode(encoder); if ((radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT | ATOM_DEVICE_DFP_SUPPORT)) ||