Re: [PATCH] drm/i915/display: Check whether platform supports joiner

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Sep 12, 2024 at 06:59:31PM +0530, Ankit Nautiyal wrote:
> Add macros to check if platform supports bigjoiner/uncompressed joiner.
> Replace the existing DISPLAY_VER checks with these.
> Additionally use it before readout for joiner stuff, where its missing.
> 
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

Nice.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_display.c         | 9 ++++++---
>  drivers/gpu/drm/i915/display/intel_display_debugfs.c | 2 +-
>  drivers/gpu/drm/i915/display/intel_display_device.h  | 2 ++
>  drivers/gpu/drm/i915/display/intel_dp.c              | 2 +-
>  4 files changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index fdf244a32b24..d4a371edfcdd 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -1712,7 +1712,7 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
>  
>  		intel_dsc_enable(pipe_crtc_state);
>  
> -		if (DISPLAY_VER(dev_priv) >= 13)
> +		if (HAS_UNCOMPRESSED_JOINER(dev_priv))
>  			intel_uncompressed_joiner_enable(pipe_crtc_state);
>  
>  		intel_set_pipe_src_size(pipe_crtc_state);
> @@ -3546,6 +3546,9 @@ static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
>  	*primary_pipes = 0;
>  	*secondary_pipes = 0;
>  
> +	if (!HAS_BIGJOINER(dev_priv))
> +		return;
> +
>  	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc,
>  					 joiner_pipes(dev_priv)) {
>  		enum intel_display_power_domain power_domain;
> @@ -3565,7 +3568,7 @@ static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
>  				*secondary_pipes |= BIT(pipe);
>  		}
>  
> -		if (DISPLAY_VER(dev_priv) < 13)
> +		if (!HAS_UNCOMPRESSED_JOINER(dev_priv))
>  			continue;
>  
>  		power_domain = POWER_DOMAIN_PIPE(pipe);
> @@ -7966,7 +7969,7 @@ static int max_dotclock(struct drm_i915_private *i915)
>  	int max_dotclock = i915->display.cdclk.max_dotclk_freq;
>  
>  	/* icl+ might use joiner */
> -	if (DISPLAY_VER(i915) >= 11)
> +	if (HAS_BIGJOINER(i915))
>  		max_dotclock *= 2;
>  
>  	return max_dotclock;
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index b75361e95e97..8caacdd624bd 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -1550,7 +1550,7 @@ void intel_connector_debugfs_add(struct intel_connector *connector)
>  				    connector, &i915_dsc_fractional_bpp_fops);
>  	}
>  
> -	if (DISPLAY_VER(i915) >= 11 &&
> +	if (HAS_BIGJOINER(i915) &&
>  	    (connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
>  	     connector_type == DRM_MODE_CONNECTOR_eDP)) {
>  		debugfs_create_bool("i915_bigjoiner_force_enable", 0644, root,
> diff --git a/drivers/gpu/drm/i915/display/intel_display_device.h b/drivers/gpu/drm/i915/display/intel_display_device.h
> index dfb0c8bf5ca2..5306bbd13e59 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_device.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_device.h
> @@ -118,6 +118,7 @@ enum intel_display_subplatform {
>  
>  #define HAS_4TILE(i915)			(IS_DG2(i915) || DISPLAY_VER(i915) >= 14)
>  #define HAS_ASYNC_FLIPS(i915)		(DISPLAY_VER(i915) >= 5)
> +#define HAS_BIGJOINER(i915)		(DISPLAY_VER(i915) >= 11)
>  #define HAS_CDCLK_CRAWL(i915)		(DISPLAY_INFO(i915)->has_cdclk_crawl)
>  #define HAS_CDCLK_SQUASH(i915)		(DISPLAY_INFO(i915)->has_cdclk_squash)
>  #define HAS_CUR_FBC(i915)		(!HAS_GMCH(i915) && IS_DISPLAY_VER(i915, 7, 13))
> @@ -152,6 +153,7 @@ enum intel_display_subplatform {
>  #define HAS_SAGV(i915)			(DISPLAY_VER(i915) >= 9 && !IS_LP(i915))
>  #define HAS_TRANSCODER(i915, trans)	((DISPLAY_RUNTIME_INFO(i915)->cpu_transcoder_mask & \
>  					  BIT(trans)) != 0)
> +#define HAS_UNCOMPRESSED_JOINER(i915)	(DISPLAY_VER(i915) >= 13)
>  #define HAS_VRR(i915)			(DISPLAY_VER(i915) >= 11)
>  #define HAS_AS_SDP(i915)		(DISPLAY_VER(i915) >= 13)
>  #define HAS_CMRR(i915)			(DISPLAY_VER(i915) >= 20)
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index cb0f6db5f8e7..c53eb8e165de 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2520,7 +2520,7 @@ bool intel_dp_joiner_needs_dsc(struct drm_i915_private *i915, bool use_joiner)
>  	 * limitation. DG2 onwards pipe joiner can be enabled without
>  	 * compression.
>  	 */
> -	return DISPLAY_VER(i915) < 13 && use_joiner;
> +	return !HAS_UNCOMPRESSED_JOINER(i915) && use_joiner;
>  }
>  
>  static int
> -- 
> 2.45.2

-- 
Ville Syrjälä
Intel