Commit 06e4cd64 authored Dec 20, 2011 by Dave Airlie

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 <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

parent 4bc22a1a

drivers/gpu/drm/radeon/atombios_crtc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)) \|\|