[Intel-gfx] [PATCH 1/5] drm/i915/crt: split out intel_crt_present() to platform specific setup

[Ville Syrjälä]

On Mon, Jan 21, 2019 at 04:21:30PM +0200, Jani Nikula wrote:
> With new platforms not having CRT support and most conditions in
> intel_crt_present() being specific to DDI, split out the CRT
> initialization to platform specific blocks in the if ladder. Add new
> Pineview block for this.
> 
> This puts intel_crt_init() more in line with the rest of the outputs,
> and makes it slightly easier for the uninitiated to figure out which
> platforms actually have what.
> 
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 37 ++++++++++++++++++----------
>  1 file changed, 24 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 2fa9f4aec08e..e8bc297c60ab 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -14245,23 +14245,17 @@ static bool has_edp_a(struct drm_i915_private *dev_priv)
>  	return true;
>  }
>  
> -static bool intel_crt_present(struct drm_i915_private *dev_priv)
> +static bool intel_ddi_crt_present(struct drm_i915_private *dev_priv)
>  {
> -	if (INTEL_GEN(dev_priv) >= 9)
> -		return false;

We should probably keep this in case the vbt is bonkers.

> -
>  	if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv))
>  		return false;
>  
> -	if (IS_CHERRYVIEW(dev_priv))
> -		return false;
> -
>  	if (HAS_PCH_LPT_H(dev_priv) &&
>  	    I915_READ(SFUSE_STRAP) & SFUSE_STRAP_CRT_DISABLED)
>  		return false;
>  
>  	/* DDI E can't be used if DDI A requires 4 lanes */
> -	if (HAS_DDI(dev_priv) && I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)
> +	if (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)
>  		return false;
>  
>  	if (!dev_priv->vbt.int_crt_support)
> @@ -14323,9 +14317,6 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
>  	 */
>  	intel_lvds_init(dev_priv);
>  
> -	if (intel_crt_present(dev_priv))
> -		intel_crt_init(dev_priv);
> -
>  	if (IS_ICELAKE(dev_priv)) {
>  		intel_ddi_init(dev_priv, PORT_A);
>  		intel_ddi_init(dev_priv, PORT_B);
> @@ -14354,6 +14345,9 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
>  	} else if (HAS_DDI(dev_priv)) {
>  		int found;
>  
> +		if (intel_ddi_crt_present(dev_priv))
> +			intel_crt_init(dev_priv);
> +
>  		/*
>  		 * Haswell uses DDI functions to detect digital outputs.
>  		 * On SKL pre-D0 the strap isn't connected, so we assume
> @@ -14385,6 +14379,10 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
>  
>  	} else if (HAS_PCH_SPLIT(dev_priv)) {
>  		int found;
> +
> +		if (dev_priv->vbt.int_crt_support)
> +			intel_crt_init(dev_priv);
> +
>  		dpd_is_edp = intel_dp_is_port_edp(dev_priv, PORT_D);
>  
>  		if (has_edp_a(dev_priv))
> @@ -14413,6 +14411,9 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
>  	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
>  		bool has_edp, has_port;
>  
> +		if (IS_VALLEYVIEW(dev_priv) && dev_priv->vbt.int_crt_support)
> +			intel_crt_init(dev_priv);
> +
>  		/*
>  		 * The DP_DETECTED bit is the latched state of the DDC
>  		 * SDA pin at boot. However since eDP doesn't require DDC
> @@ -14455,9 +14456,15 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
>  		}
>  
>  		vlv_dsi_init(dev_priv);
> -	} else if (!IS_GEN(dev_priv, 2) && !IS_PINEVIEW(dev_priv)) {
> +	} else if (IS_PINEVIEW(dev_priv)) {
> +		if (dev_priv->vbt.int_crt_support)
> +			intel_crt_init(dev_priv);
> +	} else if (IS_GEN_RANGE(dev_priv, 3, 4)) {
>  		bool found = false;
>  
> +		if (dev_priv->vbt.int_crt_support)
> +			intel_crt_init(dev_priv);
> +
>  		if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
>  			DRM_DEBUG_KMS("probing SDVOB\n");
>  			found = intel_sdvo_init(dev_priv, GEN3_SDVOB, PORT_B);
> @@ -14489,8 +14496,12 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
>  
>  		if (IS_G4X(dev_priv) && (I915_READ(DP_D) & DP_DETECTED))
>  			intel_dp_init(dev_priv, DP_D, PORT_D);
> -	} else if (IS_GEN(dev_priv, 2))
> +	} else if (IS_GEN(dev_priv, 2)) {
> +		if (dev_priv->vbt.int_crt_support)
> +			intel_crt_init(dev_priv);

int_crt_support is always true for pre-vlv/pre-hsw so we could
skip the check in most of these cases. Either way is fine by me.

With the gen9 stuff sorted this is
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> +
>  		intel_dvo_init(dev_priv);
> +	}
>  
>  	if (SUPPORTS_TV(dev_priv))
>  		intel_tv_init(dev_priv);
> -- 
> 2.20.1
> 
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-- 
Ville Syrjälä
Intel