[Intel-gfx] [v16 3/4] drm: Add colorspace info to AVI Infoframe

[Ville Syrjälä]

On Wed, Feb 13, 2019 at 12:35:10PM +0530, Uma Shankar wrote:
> This adds colorspace information to HDMI AVI infoframe.
> A helper function is added to program the same.
> 
> v2: Moved this to drm core instead of i915 driver.
> 
> v3: Exported the helper function.
> 
> v4: Added separate HDMI specific macro as per CTA spec.
> This is separate from user exposed enum values. This is
> as per Ville's suggestion.
> 
> v5: Appended BT709 and SMPTE 170M with YCC information as per Ville's
> review comment to be clear and not to be confused with RGB.
> 
> v6: Added bit wise macro for various fields of colorimetry for easier
> understanding and review as per Ville's comments. Moved the same out of
> header file to avoid any namespace issues.
> 
> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++
>  include/drm/drm_edid.h     |  6 +++++
>  2 files changed, 72 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 990b190..64816c0 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -4924,6 +4924,72 @@ static bool is_hdmi2_sink(struct drm_connector *connector)
>  }
>  EXPORT_SYMBOL(drm_hdmi_avi_infoframe_from_display_mode);
>  
> +/* HDMI Colorspace Spec Definitions */
> +#define FULL_COLORIMETRY_MASK		0x1FF
> +#define NORMAL_COLORIMETRY_MASK		0x3
> +#define EXTENDED_COLORIMETRY_MASK	0x7
> +#define EXTENDED_ACE_COLORIMETRY_MASK	0xF
> +
> +#define C(x) ((x) << 0)
> +#define EC(x) ((x) << 2)
> +#define ACE(x) ((x) << 5)
> +
> +#define HDMI_COLORIMETRY_NO_DATA		0x0
> +#define HDMI_COLORIMETRY_SMPTE_170M_YCC		(C(1) | EC(0) | ACE(0))
> +#define HDMI_COLORIMETRY_BT709_YCC		(C(2) | EC(0) | ACE(0))
> +#define HDMI_COLORIMETRY_XVYCC_601		(C(3) | EC(0) | ACE(0))
> +#define HDMI_COLORIMETRY_XVYCC_709		(C(3) | EC(1) | ACE(0))
> +#define HDMI_COLORIMETRY_SYCC_601		(C(3) | EC(2) | ACE(0))
> +#define HDMI_COLORIMETRY_OPYCC_601		(C(3) | EC(3) | ACE(0))
> +#define HDMI_COLORIMETRY_OPRGB			(C(3) | EC(4) | ACE(0))
> +#define HDMI_COLORIMETRY_BT2020_CYCC		(C(3) | EC(5) | ACE(0))
> +#define HDMI_COLORIMETRY_BT2020_RGB		(C(3) | EC(6) | ACE(0))
> +#define HDMI_COLORIMETRY_BT2020_YCC		(C(3) | EC(6) | ACE(0))
> +#define HDMI_COLORIMETRY_DCI_P3_RGB_D65		(C(3) | EC(7) | ACE(0))
> +#define HDMI_COLORIMETRY_DCI_P3_RGB_THEATER	(C(3) | EC(7) | ACE(1))
> +
> +static const u32 hdmi_colorimetry_val[] = {
> +	[DRM_MODE_COLORIMETRY_NO_DATA] = HDMI_COLORIMETRY_NO_DATA,
> +	[DRM_MODE_COLORIMETRY_SMPTE_170M_YCC] = HDMI_COLORIMETRY_SMPTE_170M_YCC,
> +	[DRM_MODE_COLORIMETRY_BT709_YCC] = HDMI_COLORIMETRY_BT709_YCC,
> +	[DRM_MODE_COLORIMETRY_XVYCC_601] = HDMI_COLORIMETRY_XVYCC_601,
> +	[DRM_MODE_COLORIMETRY_XVYCC_709] = HDMI_COLORIMETRY_XVYCC_709,
> +	[DRM_MODE_COLORIMETRY_SYCC_601] = HDMI_COLORIMETRY_SYCC_601,
> +	[DRM_MODE_COLORIMETRY_OPYCC_601] = HDMI_COLORIMETRY_OPYCC_601,
> +	[DRM_MODE_COLORIMETRY_OPRGB] = HDMI_COLORIMETRY_OPRGB,
> +	[DRM_MODE_COLORIMETRY_BT2020_CYCC] = HDMI_COLORIMETRY_BT2020_CYCC,
> +	[DRM_MODE_COLORIMETRY_BT2020_RGB] = HDMI_COLORIMETRY_BT2020_RGB,
> +	[DRM_MODE_COLORIMETRY_BT2020_YCC] = HDMI_COLORIMETRY_BT2020_YCC,
> +};

Probably best to

#undef C
#undef EC
#undef ACE

here to avoid accidents.

With that
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> +
> +/**
> + * drm_hdmi_avi_infoframe_colorspace() - fill the HDMI AVI infoframe
> + *                                       colorspace information
> + * @frame: HDMI AVI infoframe
> + * @conn_state: connector state
> + */
> +void
> +drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
> +				  const struct drm_connector_state *conn_state)
> +{
> +	u32 colorimetry_val;
> +	u32 colorimetry_index = conn_state->colorspace & FULL_COLORIMETRY_MASK;
> +
> +	if (colorimetry_index >= ARRAY_SIZE(hdmi_colorimetry_val))
> +		colorimetry_val = HDMI_COLORIMETRY_NO_DATA;
> +	else
> +		colorimetry_val = hdmi_colorimetry_val[colorimetry_index];
> +
> +	frame->colorimetry = colorimetry_val & NORMAL_COLORIMETRY_MASK;
> +	/*
> +	 * ToDo: Extend it for ACE formats as well. Modify the infoframe
> +	 * structure and extend it in drivers/video/hdmi
> +	 */
> +	frame->extended_colorimetry = (colorimetry_val >> 2) &
> +					EXTENDED_COLORIMETRY_MASK;
> +}
> +EXPORT_SYMBOL(drm_hdmi_avi_infoframe_colorspace);
> +
>  /**
>   * drm_hdmi_avi_infoframe_quant_range() - fill the HDMI AVI infoframe
>   *                                        quantization range information
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 8dc1a08..9d3b5b9 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -331,6 +331,7 @@ struct cea_sad {
>  
>  struct drm_encoder;
>  struct drm_connector;
> +struct drm_connector_state;
>  struct drm_display_mode;
>  
>  int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
> @@ -358,6 +359,11 @@ int drm_av_sync_delay(struct drm_connector *connector,
>  drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
>  					    struct drm_connector *connector,
>  					    const struct drm_display_mode *mode);
> +
> +void
> +drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
> +				  const struct drm_connector_state *conn_state);
> +
>  void
>  drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
>  				   struct drm_connector *connector,
> -- 
> 1.9.1
> 
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-- 
Ville Syrjälä
Intel