[Intel-gfx] [PATCH 5/9] drm/i915/psr: Inline psr2 caps checks.

[Dhinakaran Pandiyan]

Add a macro to check for a bit offset in a DPCD reg, use this macro to
eliminate three functions and a local.

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 66 ++++++++++++----------------------------
 1 file changed, 19 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 83874bcd1142..9f83a7430e39 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -56,73 +56,45 @@
 #include "intel_drv.h"
 #include "i915_drv.h"
 
-static bool intel_dp_get_y_cord_status(struct intel_dp *intel_dp)
-{
-	uint8_t psr_caps = 0;
-
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_CAPS, &psr_caps) != 1)
-		return false;
-	return psr_caps & DP_PSR2_SU_Y_COORDINATE_REQUIRED;
-}
-
-static bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
-{
-	uint8_t dprx = 0;
-
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_DPRX_FEATURE_ENUMERATION_LIST,
-			      &dprx) != 1)
-		return false;
-	return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED;
-}
-
-static bool intel_dp_get_alpm_status(struct intel_dp *intel_dp)
-{
-	uint8_t alpm_caps = 0;
-
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP,
-			      &alpm_caps) != 1)
-		return false;
-	return alpm_caps & DP_ALPM_CAP;
-}
+#define DPCD_READB(_reg, _off) ({ u8 _buf;				       \
+	drm_dp_dpcd_readb(&intel_dp->aux, _reg, &_buf) == 1 ? _buf & _off : 0; \
+})
 
 void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv =
 		to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
+	struct i915_psr *psr = &dev_priv->psr;
 
 	drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd,
 			 sizeof(intel_dp->psr_dpcd));
 
 	if (intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED) {
-		dev_priv->psr.sink_support = true;
+		psr->sink_support = true;
 		DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
 	}
 
 	if (INTEL_GEN(dev_priv) >= 9 &&
 	    (intel_dp->psr_dpcd[0] & DP_PSR2_IS_SUPPORTED)) {
-		uint8_t frame_sync_cap;
-
-		dev_priv->psr.sink_support = true;
-		if (drm_dp_dpcd_readb(&intel_dp->aux,
-				      DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP,
-				      &frame_sync_cap) != 1)
-			frame_sync_cap = 0;
-		dev_priv->psr.aux_frame_sync = frame_sync_cap & DP_AUX_FRAME_SYNC_CAP;
+		psr->sink_support = true;
+		psr->aux_frame_sync = DPCD_READB(DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP,
+						DP_AUX_FRAME_SYNC_CAP);
 		/* PSR2 needs frame sync as well */
-		dev_priv->psr.psr2_support = dev_priv->psr.aux_frame_sync;
+		psr->psr2_support = psr->aux_frame_sync;
 		DRM_DEBUG_KMS("PSR2 %s on sink",
-			      dev_priv->psr.psr2_support ? "supported" : "not supported");
-
-		if (dev_priv->psr.psr2_support) {
-			dev_priv->psr.y_cord_support =
-				intel_dp_get_y_cord_status(intel_dp);
-			dev_priv->psr.colorimetry_support =
-				intel_dp_get_colorimetry_status(intel_dp);
-			dev_priv->psr.alpm =
-				intel_dp_get_alpm_status(intel_dp);
+			      psr->psr2_support ? "supported" : "not supported");
+
+		if (psr->psr2_support) {
+			psr->y_cord_support = DPCD_READB(DP_PSR_CAPS,
+							DP_PSR2_SU_Y_COORDINATE_REQUIRED);
+			psr->colorimetry_support = DPCD_READB(DP_DPRX_FEATURE_ENUMERATION_LIST,
+							     DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED);
+			psr->alpm = DPCD_READB(DP_RECEIVER_ALPM_CAP,
+					      DP_ALPM_CAP);
 		}
 	}
 }
+#undef DPCD_READB
 
 static bool vlv_is_psr_active_on_pipe(struct drm_device *dev, int pipe)
 {
-- 
2.14.1