Scrambling is required for supporting any mode over 340MHz. If it's not
supported, reject any modes that would require it.
Signed-off-by: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nouveau_connector.c | 34 +++++++++++++++++++----------
1 file changed, 22 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index af68eae4c626..64228cc1412c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -977,18 +977,33 @@ nouveau_connector_get_modes(struct drm_connector *connector)
}
static unsigned
-get_tmds_link_bandwidth(struct drm_connector *connector, bool hdmi)
+get_tmds_link_bandwidth(struct drm_connector *connector)
{
struct nouveau_connector *nv_connector = nouveau_connector(connector);
+ struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
struct nouveau_drm *drm = nouveau_drm(connector->dev);
struct dcb_output *dcb = nv_connector->detected_encoder->dcb;
+ struct drm_display_info *info = NULL;
+ const unsigned duallink_scale =
+ nouveau_duallink && nv_encoder->dcb->duallink_possible ? 2 : 1;
+
+ if (drm_detect_hdmi_monitor(nv_connector->edid))
+ info = &nv_connector->base.display_info;
- if (hdmi) {
+ if (info) {
if (nouveau_hdmimhz > 0)
return nouveau_hdmimhz * 1000;
/* Note: these limits are conservative, some Fermi's
* can do 297 MHz. Unclear how this can be determined.
*/
+ if (drm->client.device.info.chipset >= 0x120) {
+ const int max_tmds_clock =
+ info->hdmi.scdc.scrambling.supported ?
+ 594000 : 340000;
+ return info->max_tmds_clock ?
+ min(info->max_tmds_clock, max_tmds_clock) :
+ max_tmds_clock;
+ }
if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_KEPLER)
return 297000;
if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_FERMI)
@@ -996,13 +1011,13 @@ get_tmds_link_bandwidth(struct drm_connector *connector, bool hdmi)
}
if (dcb->location != DCB_LOC_ON_CHIP ||
drm->client.device.info.chipset >= 0x46)
- return 165000;
+ return 165000 * duallink_scale;
else if (drm->client.device.info.chipset >= 0x40)
- return 155000;
+ return 155000 * duallink_scale;
else if (drm->client.device.info.chipset >= 0x18)
- return 135000;
+ return 135000 * duallink_scale;
else
- return 112000;
+ return 112000 * duallink_scale;
}
static enum drm_mode_status
@@ -1014,7 +1029,6 @@ nouveau_connector_mode_valid(struct drm_connector *connector,
struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
unsigned min_clock = 25000, max_clock = min_clock;
unsigned clock = mode->clock;
- bool hdmi;
switch (nv_encoder->dcb->type) {
case DCB_OUTPUT_LVDS:
@@ -1027,11 +1041,7 @@ nouveau_connector_mode_valid(struct drm_connector *connector,
max_clock = 400000;
break;
case DCB_OUTPUT_TMDS:
- hdmi = drm_detect_hdmi_monitor(nv_connector->edid);
- max_clock = get_tmds_link_bandwidth(connector, hdmi);
- if (!hdmi && nouveau_duallink &&
- nv_encoder->dcb->duallink_possible)
- max_clock *= 2;
+ max_clock = get_tmds_link_bandwidth(connector);
break;
case DCB_OUTPUT_ANALOG:
max_clock = nv_encoder->dcb->crtconf.maxfreq;
--
2.16.4
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