[Intel-gfx] [PATCH] drm/i915/hdmi: Add HDMI 2.0 audio clock recovery N values

[Jani Nikula]

On Fri, 05 Oct 2018, clinton.a.taylor at intel.com wrote:
> From: Clint Taylor <clinton.a.taylor at intel.com>
>
> HDMI 2.0 594Mhz modes were incorrectly selecting 25.200Mhz Automatic N
> value mode instead of HDMI specification values.
>
> Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_audio.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index 769f3f5..4b8f6f6 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -144,6 +144,8 @@ struct dp_aud_n_m {
>  /* HDMI N/CTS table */
>  #define TMDS_297M 297000
>  #define TMDS_296M 296703
> +#define TMDS_594M 594000
> +#define TMDS_593M 593407
>  static const struct {
>  	int sample_rate;
>  	int clock;
> @@ -164,6 +166,20 @@ struct dp_aud_n_m {
>  	{ 176400, TMDS_297M, 18816, 247500 },
>  	{ 192000, TMDS_296M, 23296, 281250 },
>  	{ 192000, TMDS_297M, 20480, 247500 },
> +	{ 44100, TMDS_593M, 8918, 937500 },
> +	{ 44100, TMDS_594M, 9408, 990000 },
> +	{ 48000, TMDS_593M, 5824, 562500 },
> +	{ 48000, TMDS_594M, 6144, 594000 },
> +	{ 32000, TMDS_593M, 5824, 843750 },
> +	{ 32000, TMDS_594M, 3072, 445500 },
> +	{ 88200, TMDS_593M, 17836, 937500 },
> +	{ 88200, TMDS_594M, 9408, 990000 },

The N here should be 18816. The rest looks good.

BR,
Jani.

> +	{ 96000, TMDS_593M, 11648, 562500 },
> +	{ 96000, TMDS_594M, 12288, 594000 },
> +	{ 176400, TMDS_593M, 35672, 937500 },
> +	{ 176400, TMDS_594M, 37632, 990000 },
> +	{ 192000, TMDS_593M, 23296, 562500 },
> +	{ 192000, TMDS_594M, 24576, 594000 },
>  };
>  
>  /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */

-- 
Jani Nikula, Intel Open Source Graphics Center