[PATCH 1/2] drm/radeon/kms: use active device to pick connector for encoder

[PATCH 1/2] drm/radeon/kms: use active device to pick connector for encoder

[Dave Airlie]

From: Dave Airlie <airlied@linux.ie>

On the W500 we have UNIPHY routed to both DVI and DP, this seems
to always pick the DVI connector which means link training fails.

Switch to using active device to pick the connector, this seems
like it should be safe from a code review, and it fixes things
a bit more here.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/radeon/radeon_encoders.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index 82eb551..10746c9 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -202,7 +202,7 @@ radeon_get_connector_for_encoder(struct drm_encoder *encoder)
 
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		radeon_connector = to_radeon_connector(connector);
-		if (radeon_encoder->devices & radeon_connector->devices)
+		if (radeon_encoder->active_device & radeon_connector->devices)
 			return connector;
 	}
 	return NULL;
-- 
1.6.5.2


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[PATCH 2/2] drm/kms/radeon: pick digitial encoders smarter. (v3)

[Dave Airlie]

From: Dave Airlie <airlied@redhat.com>

booting a Lenovo W500 with LVDS + DP outputs showed up a TODO we had
on our list, to pick a correct digital encoder block. The LVTMA
encoder requires the second digital encoder, all others can use any
encoder at all.

This fixes the digital encoder selection logic to enable LVDS/DP combos
to work okay.

V2: fix silly addition of connector dig_block and cleanup the other
places in the code that pick the encoder.

V3: rename to dig_encoder and clean up further - also fix
the picking algorithm.

tested on Lenovo W500 + desktop 3650 cards.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/radeon/atombios_dp.c     |   23 ++---
 drivers/gpu/drm/radeon/radeon_encoders.c |  163 ++++++++++++++++-------------
 drivers/gpu/drm/radeon/radeon_mode.h     |    2 +-
 3 files changed, 99 insertions(+), 89 deletions(-)

diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 9c023d2..7106011 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -596,21 +596,14 @@ void dp_link_train(struct drm_encoder *encoder,
 		return;
 	dig_connector = radeon_connector->con_priv;
 
-	if (ASIC_IS_DCE32(rdev)) {
-		if (dig->dig_block)
-			enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER;
-		else
-			enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER;
-		if (dig_connector->linkb)
-			enc_id |= ATOM_DP_CONFIG_LINK_B;
-		else
-			enc_id |= ATOM_DP_CONFIG_LINK_A;
-	} else {
-		if (dig_connector->linkb)
-			enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER | ATOM_DP_CONFIG_LINK_B;
-		else
-			enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER | ATOM_DP_CONFIG_LINK_A;
-	}
+	if (dig->dig_encoder)
+		enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER;
+	else
+		enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER;
+	if (dig_connector->linkb)
+		enc_id |= ATOM_DP_CONFIG_LINK_B;
+	else
+		enc_id |= ATOM_DP_CONFIG_LINK_A;
 
 	memset(link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
 	if (dig_connector->dp_clock == 270000)
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index 10746c9..f4b2f99 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -156,6 +156,26 @@ radeon_get_encoder_id(struct drm_device *dev, uint32_t supported_device, uint8_t
 	return ret;
 }
 
+static inline bool radeon_encoder_is_digital(struct drm_encoder *encoder)
+{
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	switch (radeon_encoder->encoder_id) {
+	case ENCODER_OBJECT_ID_INTERNAL_LVDS:
+	case ENCODER_OBJECT_ID_INTERNAL_TMDS1:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
+	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
+	case ENCODER_OBJECT_ID_INTERNAL_DVO1:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
+	case ENCODER_OBJECT_ID_INTERNAL_DDI:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+		return true;
+	default:
+		return false;
+	}
+}
 void
 radeon_link_encoder_connector(struct drm_device *dev)
 {
@@ -676,31 +696,11 @@ atombios_dig_encoder_setup(struct drm_encoder *encoder, int action)
 
 	memset(&args, 0, sizeof(args));
 
-	if (ASIC_IS_DCE32(rdev)) {
-		if (dig->dig_block)
-			index = GetIndexIntoMasterTable(COMMAND, DIG2EncoderControl);
-		else
-			index = GetIndexIntoMasterTable(COMMAND, DIG1EncoderControl);
-		num = dig->dig_block + 1;
-	} else {
-		switch (radeon_encoder->encoder_id) {
-		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
-			/* XXX doesn't really matter which dig encoder we pick as long as it's
-			 * not already in use
-			 */
-			if (dig_connector->linkb)
-				index = GetIndexIntoMasterTable(COMMAND, DIG2EncoderControl);
-			else
-				index = GetIndexIntoMasterTable(COMMAND, DIG1EncoderControl);
-			num = 1;
-			break;
-		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
-			/* Only dig2 encoder can drive LVTMA */
-			index = GetIndexIntoMasterTable(COMMAND, DIG2EncoderControl);
-			num = 2;
-			break;
-		}
-	}
+	if (dig->dig_encoder)
+		index = GetIndexIntoMasterTable(COMMAND, DIG2EncoderControl);
+	else
+		index = GetIndexIntoMasterTable(COMMAND, DIG1EncoderControl);
+	num = dig->dig_encoder + 1;
 
 	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
 
@@ -822,7 +822,7 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
 			args.v1.usPixelClock = cpu_to_le16(radeon_encoder->pixel_clock / 10);
 	}
 	if (ASIC_IS_DCE32(rdev)) {
-		if (dig->dig_block)
+		if (dig->dig_encoder == 1)
 			args.v2.acConfig.ucEncoderSel = 1;
 		if (dig_connector->linkb)
 			args.v2.acConfig.ucLinkSel = 1;
@@ -849,17 +849,16 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
 				args.v2.acConfig.fCoherentMode = 1;
 		}
 	} else {
+
 		args.v1.ucConfig = ATOM_TRANSMITTER_CONFIG_CLKSRC_PPLL;
 
+		if (dig->dig_encoder)
+			args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG2_ENCODER;
+		else
+			args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG1_ENCODER;
+
 		switch (radeon_encoder->encoder_id) {
 		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
-			/* XXX doesn't really matter which dig encoder we pick as long as it's
-			 * not already in use
-			 */
-			if (dig_connector->linkb)
-				args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG2_ENCODER;
-			else
-				args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG1_ENCODER;
 			if (rdev->flags & RADEON_IS_IGP) {
 				if (radeon_encoder->pixel_clock > 165000) {
 					if (dig_connector->igp_lane_info & 0x3)
@@ -878,10 +877,6 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
 				}
 			}
 			break;
-		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
-			/* Only dig2 encoder can drive LVTMA */
-			args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG2_ENCODER;
-			break;
 		}
 
 		if (radeon_encoder->pixel_clock > 165000)
@@ -1046,6 +1041,7 @@ atombios_set_encoder_crtc_source(struct drm_encoder *encoder)
 	union crtc_sourc_param args;
 	int index = GetIndexIntoMasterTable(COMMAND, SelectCRTC_Source);
 	uint8_t frev, crev;
+	struct radeon_encoder_atom_dig *dig;
 
 	memset(&args, 0, sizeof(args));
 
@@ -1109,40 +1105,16 @@ atombios_set_encoder_crtc_source(struct drm_encoder *encoder)
 			case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
 			case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
 			case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
-				if (ASIC_IS_DCE32(rdev)) {
-					if (radeon_crtc->crtc_id)
-						args.v2.ucEncoderID = ASIC_INT_DIG2_ENCODER_ID;
-					else
-						args.v2.ucEncoderID = ASIC_INT_DIG1_ENCODER_ID;
-				} else {
-					struct drm_connector *connector;
-					struct radeon_connector *radeon_connector;
-					struct radeon_connector_atom_dig *dig_connector;
-
-					connector = radeon_get_connector_for_encoder(encoder);
-					if (!connector)
-						return;
-					radeon_connector = to_radeon_connector(connector);
-					if (!radeon_connector->con_priv)
-						return;
-					dig_connector = radeon_connector->con_priv;
-
-					/* XXX doesn't really matter which dig encoder we pick as long as it's
-					 * not already in use
-					 */
-					if (dig_connector->linkb)
-						args.v2.ucEncoderID = ASIC_INT_DIG2_ENCODER_ID;
-					else
-						args.v2.ucEncoderID = ASIC_INT_DIG1_ENCODER_ID;
-				}
+			case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+				dig = radeon_encoder->enc_priv;
+				if (dig->dig_encoder)
+					args.v2.ucEncoderID = ASIC_INT_DIG2_ENCODER_ID;
+				else
+					args.v2.ucEncoderID = ASIC_INT_DIG1_ENCODER_ID;
 				break;
 			case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
 				args.v2.ucEncoderID = ASIC_INT_DVO_ENCODER_ID;
 				break;
-			case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
-				/* Only dig2 encoder can drive LVTMA */
-				args.v2.ucEncoderID = ASIC_INT_DIG2_ENCODER_ID;
-				break;
 			case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DAC1:
 				if (radeon_encoder->active_device & (ATOM_DEVICE_TV_SUPPORT))
 					args.v2.ucEncoderID = ASIC_INT_TV_ENCODER_ID;
@@ -1202,6 +1174,47 @@ atombios_apply_encoder_quirks(struct drm_encoder *encoder,
 	}
 }
 
+static int radeon_atom_pick_dig_encoder(struct drm_encoder *encoder)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	struct drm_encoder *test_encoder;
+	struct radeon_encoder_atom_dig *dig;
+	uint32_t dig_enc_in_use = 0;
+	/* on DCE32 and encoder can driver any block so just crtc id */
+	if (ASIC_IS_DCE32(rdev)) {
+		return radeon_crtc->crtc_id;
+	}
+
+	/* on DCE3 - LVTMA can only be driven by DIGB */
+	list_for_each_entry(test_encoder, &dev->mode_config.encoder_list, head) {
+		struct radeon_encoder *radeon_test_encoder;
+	  
+		if (encoder == test_encoder)
+			continue;
+
+		if (!radeon_encoder_is_digital(test_encoder))
+			continue;
+
+		radeon_test_encoder = to_radeon_encoder(test_encoder);
+		dig = radeon_test_encoder->enc_priv;
+
+		if (dig->dig_encoder >= 0)
+			dig_enc_in_use |= (1 << dig->dig_encoder);
+	}
+
+	if (radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA) {
+		if (dig_enc_in_use & 0x2)
+			DRM_ERROR("LVDS required digital encoder 2 but it was in use - stealing\n");
+		return 1;
+	}
+	if (!(dig_enc_in_use & 1))
+		return 0;
+	return 1;
+}
+
 static void
 radeon_atom_encoder_mode_set(struct drm_encoder *encoder,
 			     struct drm_display_mode *mode,
@@ -1214,12 +1227,9 @@ radeon_atom_encoder_mode_set(struct drm_encoder *encoder,
 
 	if (radeon_encoder->active_device &
 	    (ATOM_DEVICE_DFP_SUPPORT | ATOM_DEVICE_LCD_SUPPORT)) {
-		if (radeon_encoder->enc_priv) {
-			struct radeon_encoder_atom_dig *dig;
-
-			dig = radeon_encoder->enc_priv;
-			dig->dig_block = radeon_crtc->crtc_id;
-		}
+		struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
+		if (dig)
+			dig->dig_encoder = radeon_atom_pick_dig_encoder(encoder);
 	}
 	radeon_encoder->pixel_clock = adjusted_mode->clock;
 
@@ -1379,7 +1389,13 @@ static void radeon_atom_encoder_commit(struct drm_encoder *encoder)
 static void radeon_atom_encoder_disable(struct drm_encoder *encoder)
 {
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	struct radeon_encoder_atom_dig *dig;
 	radeon_atom_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
+
+	if (radeon_encoder_is_digital(encoder)) {
+		dig = radeon_encoder->enc_priv;
+		dig->dig_encoder = -1;
+	}
 	radeon_encoder->active_device = 0;
 }
 
@@ -1436,6 +1452,7 @@ radeon_atombios_set_dig_info(struct radeon_encoder *radeon_encoder)
 
 	/* coherent mode by default */
 	dig->coherent_mode = true;
+	dig->dig_encoder = -1;
 
 	return dig;
 }
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 96b851f..e81b2ae 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -299,7 +299,7 @@ struct radeon_atom_ss {
 struct radeon_encoder_atom_dig {
 	/* atom dig */
 	bool coherent_mode;
-	int dig_block;
+	int dig_encoder; /* -1 disabled, 0 DIGA, 1 DIGB */
 	/* atom lvds */
 	uint32_t lvds_misc;
 	uint16_t panel_pwr_delay;
-- 
1.6.5.2


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