On Tue, Dec 20, 2011 at 6:47 AM, Dave Airlie <airlied@xxxxxxxxx> wrote:
> From: Dave Airlie <airlied@xxxxxxxxxx>
>
> 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@xxxxxxxxx>
>
> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
> ---
> drivers/gpu/drm/radeon/atombios_crtc.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
> index 2b97262..260fcdc 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)) ||
> --
> 1.7.7.3
>
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