On Tue, May 05, 2015 at 05:06:27PM +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Currently we're forgetting to double the port clock when using double
> clocked modes with 12bpc on HDMI. We're only accounting for the 1.5x
> factor due to the 12bpc. So further double the 1.5x port clock when we
> have a double clocked mode.
>
> Unfortunately I don't have any displays that support both 12bpc and
> double clocked modes, so I was unable to test this.
Actually I was able to test this by manually adding some CEA double
clocked modes. My TV happily accepted them even if it didn't list them
in the EDID.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_hdmi.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 1810242..f3eec38 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1248,6 +1248,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
>
> if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) {
> pipe_config->pixel_multiplier = 2;
> + clock_12bpc *= 2;
> }
>
> if (intel_hdmi->color_range)
> --
> 2.0.5
>
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--
Ville Syrjälä
Intel OTC
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