[Intel-gfx] [v9 07/12] drm/i915/display: Enable HDR for Parade based lspcon

[Uma Shankar]

Enable HDR for LSPCON based on Parade along with MCA.

v2: Added a helper for status reg as suggested by Ville.

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
Signed-off-by: Vipin Anand <vipin.anand at intel.com>
---
 drivers/gpu/drm/i915/display/intel_lspcon.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index 19831f5e51bf..0cd3e0853cbf 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -36,6 +36,7 @@
 #define LSPCON_VENDOR_MCA_OUI 0x0060AD
 
 #define DPCD_MCA_LSPCON_HDR_STATUS	0x70003
+#define DPCD_PARADE_LSPCON_HDR_STATUS	0x00511
 
 /* AUX addresses to write MCA AVI IF */
 #define LSPCON_MCA_AVI_IF_WRITE_OFFSET 0x5C0
@@ -106,21 +107,27 @@ static bool lspcon_detect_vendor(struct intel_lspcon *lspcon)
 	return true;
 }
 
+static u32 get_hdr_status_reg(struct intel_lspcon *lspcon)
+{
+	if (lspcon->vendor == LSPCON_VENDOR_MCA)
+		return DPCD_MCA_LSPCON_HDR_STATUS;
+	else
+		return DPCD_PARADE_LSPCON_HDR_STATUS;
+}
+
 void lspcon_detect_hdr_capability(struct intel_lspcon *lspcon)
 {
 	struct intel_digital_port *dig_port =
 		container_of(lspcon, struct intel_digital_port, lspcon);
 	struct drm_device *dev = dig_port->base.base.dev;
 	struct intel_dp *dp = lspcon_to_intel_dp(lspcon);
+	u32 lspcon_hdr_status_reg;
 	u8 hdr_caps;
 	int ret;
 
-	/* Enable HDR for MCA based LSPCON devices */
-	if (lspcon->vendor == LSPCON_VENDOR_MCA)
-		ret = drm_dp_dpcd_read(&dp->aux, DPCD_MCA_LSPCON_HDR_STATUS,
-				       &hdr_caps, 1);
-	else
-		return;
+	lspcon_hdr_status_reg = get_hdr_status_reg(lspcon);
+	ret = drm_dp_dpcd_read(&dp->aux, lspcon_hdr_status_reg,
+			       &hdr_caps, 1);
 
 	if (ret < 0) {
 		drm_dbg_kms(dev, "hdr capability detection failed\n");
-- 
2.26.2