drm: Rename struct edp_vsc_psr to struct dp_sdp

VSC SDP Payload for PSR is one of data block type of SDP (Secondaray Data
Packet). In order to generalize SDP packet structure name, it renames
struct edp_vsc_psr to struct dp_sdp. And each SDP data blocks have
different usages, each SDP type has different reserved data blocks and
Video_Stream_Configuration Extension VESA SDP might use all of Data Blocks
as Extended INFORFRAME Data Byte. so it makes Data Block variables as
array type. And it adds comments of details of DB of VSC SDP Payload
for Pixel Encoding/Colorimetry Format. This comments follows DP 1.4a spec,
section 2.2.5.7.5, chapter "VSC SDP Payload for Pixel Encoding/Colorimetry
Format".

v7: Addressed review comments from Ville.

v9: Rename a member value name DB to db on struct dp_sdp [Laurent]

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190521121721.32010-3-gwan-gyeong.mun@intel.com

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

@@ -115,7 +115,7 @@ EXPORT_SYMBOL_GPL(analogix_dp_psr_enabled);
 
 int analogix_dp_enable_psr(struct analogix_dp_device *dp)
 {
-	struct edp_vsc_psr psr_vsc;
+	struct dp_sdp psr_vsc;
 
 	if (!dp->psr_enable)
 		return 0;
@@ -127,8 +127,8 @@ int analogix_dp_enable_psr(struct analogix_dp_device *dp)
 	psr_vsc.sdp_header.HB2 = 0x2;
 	psr_vsc.sdp_header.HB3 = 0x8;
 
-	psr_vsc.DB0 = 0;
-	psr_vsc.DB1 = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID;
+	psr_vsc.db[0] = 0;
+	psr_vsc.db[1] = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID;
 
 	return analogix_dp_send_psr_spd(dp, &psr_vsc, true);
 }
@@ -136,7 +136,7 @@ EXPORT_SYMBOL_GPL(analogix_dp_enable_psr);
 
 int analogix_dp_disable_psr(struct analogix_dp_device *dp)
 {
-	struct edp_vsc_psr psr_vsc;
+	struct dp_sdp psr_vsc;
 	int ret;
 
 	if (!dp->psr_enable)
@@ -149,8 +149,8 @@ int analogix_dp_disable_psr(struct analogix_dp_device *dp)
 	psr_vsc.sdp_header.HB2 = 0x2;
 	psr_vsc.sdp_header.HB3 = 0x8;
 
-	psr_vsc.DB0 = 0;
-	psr_vsc.DB1 = 0;
+	psr_vsc.db[0] = 0;
+	psr_vsc.db[1] = 0;
 
 	ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
 	if (ret != 1) {

drivers/gpu/drm/bridge/analogix/analogix_dp_core.h

@@ -254,7 +254,7 @@ void analogix_dp_enable_scrambling(struct analogix_dp_device *dp);
 void analogix_dp_disable_scrambling(struct analogix_dp_device *dp);
 void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp);
 int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
-			     struct edp_vsc_psr *vsc, bool blocking);
+			     struct dp_sdp *vsc, bool blocking);
 ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
 			     struct drm_dp_aux_msg *msg);
 

drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c

@@ -1041,7 +1041,7 @@ static ssize_t analogix_dp_get_psr_status(struct analogix_dp_device *dp)
 }
 
 int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
-			     struct edp_vsc_psr *vsc, bool blocking)
+			     struct dp_sdp *vsc, bool blocking)
 {
 	unsigned int val;
 	int ret;
@@ -1069,8 +1069,8 @@ int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
 	writel(0x5D, dp->reg_base + ANALOGIX_DP_SPD_PB3);
 
 	/* configure DB0 / DB1 values */
-	writel(vsc->DB0, dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB0);
-	writel(vsc->DB1, dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB1);
+	writel(vsc->db[0], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB0);
+	writel(vsc->db[1], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB1);
 
 	/* set reuse spd inforframe */
 	val = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
@@ -1092,8 +1092,8 @@ int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
 
 	ret = readx_poll_timeout(analogix_dp_get_psr_status, dp, psr_status,
 		psr_status >= 0 &&
-		((vsc->DB1 && psr_status == DP_PSR_SINK_ACTIVE_RFB) ||
-		(!vsc->DB1 && psr_status == DP_PSR_SINK_INACTIVE)), 1500,
+		((vsc->db[1] && psr_status == DP_PSR_SINK_ACTIVE_RFB) ||
+		(!vsc->db[1] && psr_status == DP_PSR_SINK_INACTIVE)), 1500,
 		DP_TIMEOUT_PSR_LOOP_MS * 1000);
 	if (ret) {
 		dev_warn(dp->dev, "Failed to apply PSR %d\n", ret);

drivers/gpu/drm/i915/intel_psr.c

@@ -342,7 +342,7 @@ static void intel_psr_setup_vsc(struct intel_dp *intel_dp,
 {
 	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct edp_vsc_psr psr_vsc;
+	struct dp_sdp psr_vsc;
 
 	if (dev_priv->psr.psr2_enabled) {
 		/* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */

include/drm/drm_dp_helper.h

@@ -1083,17 +1083,30 @@ struct dp_sdp_header {
 #define EDP_SDP_HEADER_VALID_PAYLOAD_BYTES	0x1F
 #define DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1 0x7F
 
-struct edp_vsc_psr {
+/**
+ * struct dp_sdp - DP secondary data packet
+ * @sdp_header: DP secondary data packet header
+ * @db: DP secondaray data packet data blocks
+ * VSC SDP Payload for PSR
+ * db[0]: Stereo Interface
+ * db[1]: 0 - PSR State; 1 - Update RFB; 2 - CRC Valid
+ * db[2]: CRC value bits 7:0 of the R or Cr component
+ * db[3]: CRC value bits 15:8 of the R or Cr component
+ * db[4]: CRC value bits 7:0 of the G or Y component
+ * db[5]: CRC value bits 15:8 of the G or Y component
+ * db[6]: CRC value bits 7:0 of the B or Cb component
+ * db[7]: CRC value bits 15:8 of the B or Cb component
+ * db[8] - db[31]: Reserved
+ * VSC SDP Payload for Pixel Encoding/Colorimetry Format
+ * db[0] - db[15]: Reserved
+ * db[16]: Pixel Encoding and Colorimetry Formats
+ * db[17]: Dynamic Range and Component Bit Depth
+ * db[18]: Content Type
+ * db[19] - db[31]: Reserved
+ */
+struct dp_sdp {
 	struct dp_sdp_header sdp_header;
-	u8 DB0; /* Stereo Interface */
-	u8 DB1; /* 0 - PSR State; 1 - Update RFB; 2 - CRC Valid */
-	u8 DB2; /* CRC value bits 7:0 of the R or Cr component */
-	u8 DB3; /* CRC value bits 15:8 of the R or Cr component */
-	u8 DB4; /* CRC value bits 7:0 of the G or Y component */
-	u8 DB5; /* CRC value bits 15:8 of the G or Y component */
-	u8 DB6; /* CRC value bits 7:0 of the B or Cb component */
-	u8 DB7; /* CRC value bits 15:8 of the B or Cb component */
-	u8 DB8_31[24]; /* Reserved */
+	u8 db[32];
 } __packed;
 
 #define EDP_VSC_PSR_STATE_ACTIVE	(1<<0)