drm/radeon/kms: make sure i2c id matches

Entries in the i2c table aren't always ordered
by id.  This allows us to remove some quirks
that are no longer needed.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -70,6 +70,7 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev
 	int index = GetIndexIntoMasterTable(DATA, GPIO_I2C_Info);
 	struct _ATOM_GPIO_I2C_INFO *i2c_info;
 	uint16_t data_offset;
+	int i;
 
 	memset(&i2c, 0, sizeof(struct radeon_i2c_bus_rec));
 	i2c.valid = false;
@@ -78,8 +79,11 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev
 
 	i2c_info = (struct _ATOM_GPIO_I2C_INFO *)(ctx->bios + data_offset);
 
-	gpio = &i2c_info->asGPIO_Info[id];
 
+	for (i = 0; i < ATOM_MAX_SUPPORTED_DEVICE; i++) {
+		gpio = &i2c_info->asGPIO_Info[i];
+
+		if (gpio->sucI2cId.ucAccess == id) {
 			i2c.mask_clk_reg = le16_to_cpu(gpio->usClkMaskRegisterIndex) * 4;
 			i2c.mask_data_reg = le16_to_cpu(gpio->usDataMaskRegisterIndex) * 4;
 			i2c.en_clk_reg = le16_to_cpu(gpio->usClkEnRegisterIndex) * 4;
@@ -110,6 +114,8 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev
 			i2c.i2c_id = gpio->sucI2cId.ucAccess;
 
 			i2c.valid = true;
+		}
+	}
 
 	return i2c;
 }
@@ -503,6 +509,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 								 usRecordOffset));
 						ATOM_I2C_RECORD *i2c_record;
 						ATOM_HPD_INT_RECORD *hpd_record;
+						ATOM_I2C_ID_CONFIG_ACCESS *i2c_config;
 						hpd.hpd = RADEON_HPD_NONE;
 
 						while (record->ucRecordType > 0
@@ -514,10 +521,12 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 								i2c_record =
 								    (ATOM_I2C_RECORD *)
 									record;
+								i2c_config =
+									(ATOM_I2C_ID_CONFIG_ACCESS *)
+									&i2c_record->sucI2cId;
 								ddc_bus = radeon_lookup_i2c_gpio(rdev,
-												 i2c_record->
-												 sucI2cId.
-												 bfI2C_LineMux);
+												 i2c_config->
+												 ucAccess);
 								break;
 							case ATOM_HPD_INT_RECORD_TYPE:
 								hpd_record =
@@ -670,22 +679,8 @@ bool radeon_get_atom_connector_info_from_supported_devices_table(struct
 
 		dac = ci.sucConnectorInfo.sbfAccess.bfAssociatedDAC;
 
-		if ((rdev->family == CHIP_RS690) ||
-		    (rdev->family == CHIP_RS740)) {
-			if ((i == ATOM_DEVICE_DFP2_INDEX)
-			    && (ci.sucI2cId.sbfAccess.bfI2C_LineMux == 2))
-				bios_connectors[i].line_mux =
-				    ci.sucI2cId.sbfAccess.bfI2C_LineMux + 1;
-			else if ((i == ATOM_DEVICE_DFP3_INDEX)
-				 && (ci.sucI2cId.sbfAccess.bfI2C_LineMux == 1))
-				bios_connectors[i].line_mux =
-				    ci.sucI2cId.sbfAccess.bfI2C_LineMux + 1;
-			else
-				bios_connectors[i].line_mux =
-				    ci.sucI2cId.sbfAccess.bfI2C_LineMux;
-		} else
 		bios_connectors[i].line_mux =
-			    ci.sucI2cId.sbfAccess.bfI2C_LineMux;
+			ci.sucI2cId.ucAccess;
 
 		/* give tv unique connector ids */
 		if (i == ATOM_DEVICE_TV1_INDEX) {