drm/nouveau: Workaround broken TV load detection on a "Zotac FX5200".
The blob seems to have the same problem so it's probably a hardware
issue (bug 28810).
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv17_tv.c b/drivers/gpu/drm/nouveau/nv17_tv.c
index 864867e..359506e 100644
--- a/drivers/gpu/drm/nouveau/nv17_tv.c
+++ b/drivers/gpu/drm/nouveau/nv17_tv.c
@@ -116,6 +116,20 @@
return sample;
}
+static bool
+get_tv_detect_quirks(struct drm_device *dev, uint32_t *pin_mask)
+{
+ /* Zotac FX5200 */
+ if ((dev->pdev->device == 0x0322) &&
+ (dev->pdev->subsystem_vendor == 0x19da) &&
+ (dev->pdev->subsystem_device == 0x2035)) {
+ *pin_mask = 0xc;
+ return false;
+ }
+
+ return true;
+}
+
static enum drm_connector_status
nv17_tv_detect(struct drm_encoder *encoder, struct drm_connector *connector)
{
@@ -124,15 +138,20 @@
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;
+ bool reliable = get_tv_detect_quirks(dev, &tv_enc->pin_mask);
if (nv04_dac_in_use(encoder))
return connector_status_disconnected;
- if (dev_priv->chipset == 0x42 ||
- dev_priv->chipset == 0x43)
- tv_enc->pin_mask = nv42_tv_sample_load(encoder) >> 28 & 0xe;
- else
- tv_enc->pin_mask = nv17_dac_sample_load(encoder) >> 28 & 0xe;
+ if (reliable) {
+ if (dev_priv->chipset == 0x42 ||
+ dev_priv->chipset == 0x43)
+ tv_enc->pin_mask =
+ nv42_tv_sample_load(encoder) >> 28 & 0xe;
+ else
+ tv_enc->pin_mask =
+ nv17_dac_sample_load(encoder) >> 28 & 0xe;
+ }
switch (tv_enc->pin_mask) {
case 0x2:
@@ -157,7 +176,9 @@
conf->tv_subconnector_property,
tv_enc->subconnector);
- if (tv_enc->subconnector) {
+ if (!reliable) {
+ return connector_status_unknown;
+ } else if (tv_enc->subconnector) {
NV_INFO(dev, "Load detected on output %c\n",
'@' + ffs(dcb->or));
return connector_status_connected;