drm/nouveau: Clean up the nv17-nv4x load detection code a bit.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -1074,8 +1074,7 @@ extern long nouveau_compat_ioctl(struct file *file, unsigned int cmd,
 
 /* nv04_dac.c */
 extern int nv04_dac_create(struct drm_device *dev, struct dcb_entry *entry);
-extern enum drm_connector_status nv17_dac_detect(struct drm_encoder *encoder,
-						 struct drm_connector *connector);
+extern uint32_t nv17_dac_sample_load(struct drm_encoder *encoder);
 extern int nv04_dac_output_offset(struct drm_encoder *encoder);
 extern void nv04_dac_update_dacclk(struct drm_encoder *encoder, bool enable);
 
@@ -1093,9 +1092,6 @@ extern int nv04_tv_create(struct drm_device *dev, struct dcb_entry *entry);
 
 /* nv17_tv.c */
 extern int nv17_tv_create(struct drm_device *dev, struct dcb_entry *entry);
-extern enum drm_connector_status nv17_tv_detect(struct drm_encoder *encoder,
-						struct drm_connector *connector,
-						uint32_t pin_mask);
 
 /* nv04_display.c */
 extern int nv04_display_create(struct drm_device *);

drivers/gpu/drm/nouveau/nv04_dac.c

@@ -212,16 +212,15 @@ out:
 	return connector_status_disconnected;
 }
 
-enum drm_connector_status nv17_dac_detect(struct drm_encoder *encoder,
-					  struct drm_connector *connector)
+uint32_t nv17_dac_sample_load(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb;
-	uint32_t testval, regoffset = nv04_dac_output_offset(encoder);
+	uint32_t sample, testval, regoffset = nv04_dac_output_offset(encoder);
 	uint32_t saved_powerctrl_2 = 0, saved_powerctrl_4 = 0, saved_routput,
 		saved_rtest_ctrl, saved_gpio0, saved_gpio1, temp, routput;
-	int head, present = 0;
+	int head;
 
 #define RGB_TEST_DATA(r, g, b) (r << 0 | g << 10 | b << 20)
 	if (dcb->type == OUTPUT_TV) {
@@ -287,13 +286,7 @@ enum drm_connector_status nv17_dac_detect(struct drm_encoder *encoder,
 		      temp | NV_PRAMDAC_TEST_CONTROL_TP_INS_EN_ASSERTED);
 	msleep(5);
 
-	temp = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
-
-	if (dcb->type == OUTPUT_TV)
-		present = (nv17_tv_detect(encoder, connector, temp)
-			   == connector_status_connected);
-	else
-		present = temp & NV_PRAMDAC_TEST_CONTROL_SENSEB_ALLHI;
+	sample = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 
 	temp = NVReadRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL);
 	NVWriteRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL,
@@ -310,14 +303,24 @@ enum drm_connector_status nv17_dac_detect(struct drm_encoder *encoder,
 	nv17_gpio_set(dev, DCB_GPIO_TVDAC1, saved_gpio1);
 	nv17_gpio_set(dev, DCB_GPIO_TVDAC0, saved_gpio0);
 
-	if (present) {
-		NV_INFO(dev, "Load detected on output %c\n", '@' + ffs(dcb->or));
-		return connector_status_connected;
-	}
-
-	return connector_status_disconnected;
+	return sample;
 }
 
+static enum drm_connector_status
+nv17_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
+{
+	struct drm_device *dev = encoder->dev;
+	struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb;
+	uint32_t sample = nv17_dac_sample_load(encoder);
+
+	if (sample & NV_PRAMDAC_TEST_CONTROL_SENSEB_ALLHI) {
+		NV_INFO(dev, "Load detected on output %c\n",
+			'@' + ffs(dcb->or));
+		return connector_status_connected;
+	} else {
+		return connector_status_disconnected;
+	}
+}
 
 static bool nv04_dac_mode_fixup(struct drm_encoder *encoder,
 				struct drm_display_mode *mode,

drivers/gpu/drm/nouveau/nv17_tv.c

@@ -33,13 +33,15 @@
 #include "nouveau_hw.h"
 #include "nv17_tv.h"
 
-enum drm_connector_status nv17_tv_detect(struct drm_encoder *encoder,
-					 struct drm_connector *connector,
-					 uint32_t pin_mask)
+static enum drm_connector_status
+nv17_tv_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 {
+	struct drm_device *dev = encoder->dev;
+	struct drm_mode_config *conf = &dev->mode_config;
 	struct nv17_tv_encoder *tv_enc = to_tv_enc(encoder);
+	struct dcb_entry *dcb = tv_enc->base.dcb;
 
-	tv_enc->pin_mask = pin_mask >> 28 & 0xe;
+	tv_enc->pin_mask = nv17_dac_sample_load(encoder) >> 28 & 0xe;
 
 	switch (tv_enc->pin_mask) {
 	case 0x2:
@@ -50,7 +52,7 @@ enum drm_connector_status nv17_tv_detect(struct drm_encoder *encoder,
 		tv_enc->subconnector = DRM_MODE_SUBCONNECTOR_SVIDEO;
 		break;
 	case 0xe:
-		if (nouveau_encoder(encoder)->dcb->tvconf.has_component_output)
+		if (dcb->tvconf.has_component_output)
 			tv_enc->subconnector = DRM_MODE_SUBCONNECTOR_Component;
 		else
 			tv_enc->subconnector = DRM_MODE_SUBCONNECTOR_SCART;
@@ -61,11 +63,16 @@ enum drm_connector_status nv17_tv_detect(struct drm_encoder *encoder,
 	}
 
 	drm_connector_property_set_value(connector,
-			encoder->dev->mode_config.tv_subconnector_property,
+					 conf->tv_subconnector_property,
 					 tv_enc->subconnector);
 
-	return tv_enc->subconnector ? connector_status_connected :
-					connector_status_disconnected;
+	if (tv_enc->subconnector) {
+		NV_INFO(dev, "Load detected on output %c\n",
+			'@' + ffs(dcb->or));
+		return connector_status_connected;
+	} else {
+		return connector_status_disconnected;
+	}
 }
 
 static const struct {
@@ -633,7 +640,7 @@ static struct drm_encoder_helper_funcs nv17_tv_helper_funcs = {
 	.prepare = nv17_tv_prepare,
 	.commit = nv17_tv_commit,
 	.mode_set = nv17_tv_mode_set,
-	.detect = nv17_dac_detect,
+	.detect = nv17_tv_detect,
 };
 
 static struct drm_encoder_slave_funcs nv17_tv_slave_funcs = {