[Intel-gfx] [PATCH v3] drm/i915: Add missing HDMI audio pixel clocks for gen12

[Ville Syrjälä]

On Tue, Mar 10, 2020 at 06:23:38PM +0200, Kai Vehmanen wrote:
> Gen12 hardware supports HDMI audio pixel clocks of 296.7/297Mhz
> and 593.4/594Mhz. Add the missing rates and add logic to ignore
> them if running on older hardware.
> 
> Bspec: 49333
> Signed-off-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>
> Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Thanks. Pushed to dinq.

> ---
>  drivers/gpu/drm/i915/display/intel_audio.c | 8 ++++++++
>  drivers/gpu/drm/i915/i915_reg.h            | 4 ++++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
> index 19bf206037c2..62f234f641de 100644
> --- a/drivers/gpu/drm/i915/display/intel_audio.c
> +++ b/drivers/gpu/drm/i915/display/intel_audio.c
> @@ -149,6 +149,10 @@ static const struct {
>  	{ 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
>  	{ 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
>  	{ 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
> +	{ 296703, AUD_CONFIG_PIXEL_CLOCK_HDMI_296703 },
> +	{ 297000, AUD_CONFIG_PIXEL_CLOCK_HDMI_297000 },
> +	{ 593407, AUD_CONFIG_PIXEL_CLOCK_HDMI_593407 },
> +	{ 594000, AUD_CONFIG_PIXEL_CLOCK_HDMI_594000 },
>  };
>  
>  /* HDMI N/CTS table */
> @@ -234,6 +238,7 @@ static const struct hdmi_aud_ncts hdmi_aud_ncts_36bpp[] = {
>  /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
>  static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_state)
>  {
> +	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
>  	const struct drm_display_mode *adjusted_mode =
>  		&crtc_state->hw.adjusted_mode;
>  	int i;
> @@ -243,6 +248,9 @@ static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_sta
>  			break;
>  	}
>  
> +	if (INTEL_GEN(dev_priv) < 12 && adjusted_mode->crtc_clock > 148500)
> +		i = ARRAY_SIZE(hdmi_audio_clock);
> +
>  	if (i == ARRAY_SIZE(hdmi_audio_clock)) {
>  		DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
>  			      adjusted_mode->crtc_clock);
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 79ae9654dac9..ee4a75ac9186 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -9251,6 +9251,10 @@ enum {
>  #define   AUD_CONFIG_PIXEL_CLOCK_HDMI_74250	(7 << 16)
>  #define   AUD_CONFIG_PIXEL_CLOCK_HDMI_148352	(8 << 16)
>  #define   AUD_CONFIG_PIXEL_CLOCK_HDMI_148500	(9 << 16)
> +#define   AUD_CONFIG_PIXEL_CLOCK_HDMI_296703	(10 << 16)
> +#define   AUD_CONFIG_PIXEL_CLOCK_HDMI_297000	(11 << 16)
> +#define   AUD_CONFIG_PIXEL_CLOCK_HDMI_593407	(12 << 16)
> +#define   AUD_CONFIG_PIXEL_CLOCK_HDMI_594000	(13 << 16)
>  #define   AUD_CONFIG_DISABLE_NCTS		(1 << 3)
>  
>  /* HSW Audio */
> -- 
> 2.17.1

-- 
Ville Syrjälä
Intel