Ilia Mirkin
2015-Nov-03 22:41 UTC
[Nouveau] [PATCH 1/2] disp: activate dual link TMDS links only when possible
From: Hauke Mehrtens <hauke at hauke-m.de>
Without this patch a pixel clock rate above 165 MHz on a TMDS link is
assumed to be dual link. This is true for DVI, but not for HDMI. HDMI
supports no dual link, but it supports pixel clock rates above 165 MHz.
Only activate Dual Link mode when it is actual possible.
Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
drm/nouveau/nv50_display.c | 8 ++++----
drm/nouveau/nvkm/engine/disp/gf119.c | 2 +-
drm/nouveau/nvkm/engine/disp/nv50.c | 2 +-
3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drm/nouveau/nv50_display.c b/drm/nouveau/nv50_display.c
index c053c50..93bcfdf 100644
--- a/drm/nouveau/nv50_display.c
+++ b/drm/nouveau/nv50_display.c
@@ -1961,10 +1961,10 @@ nv50_sor_mode_set(struct drm_encoder *encoder, struct
drm_display_mode *umode,
switch (nv_encoder->dcb->type) {
case DCB_OUTPUT_TMDS:
if (nv_encoder->dcb->sorconf.link & 1) {
- if (mode->clock < 165000)
- proto = 0x1;
- else
- proto = 0x5;
+ proto = 0x1;
+ if (mode->clock >= 165000 &&
+ nv_encoder->dcb->duallink_possible)
+ proto |= 0x4;
} else {
proto = 0x2;
}
diff --git a/drm/nouveau/nvkm/engine/disp/gf119.c
b/drm/nouveau/nvkm/engine/disp/gf119.c
index 186fd3a..8691b68 100644
--- a/drm/nouveau/nvkm/engine/disp/gf119.c
+++ b/drm/nouveau/nvkm/engine/disp/gf119.c
@@ -158,7 +158,7 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32
pclk, u32 *conf)
switch (outp->info.type) {
case DCB_OUTPUT_TMDS:
*conf = (ctrl & 0x00000f00) >> 8;
- if (pclk >= 165000)
+ if (pclk >= 165000 && outp->info.duallink_possible)
*conf |= 0x0100;
break;
case DCB_OUTPUT_LVDS:
diff --git a/drm/nouveau/nvkm/engine/disp/nv50.c
b/drm/nouveau/nvkm/engine/disp/nv50.c
index 32e73a9..ceecd0e 100644
--- a/drm/nouveau/nvkm/engine/disp/nv50.c
+++ b/drm/nouveau/nvkm/engine/disp/nv50.c
@@ -391,7 +391,7 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32
pclk, u32 *conf)
switch (outp->info.type) {
case DCB_OUTPUT_TMDS:
*conf = (ctrl & 0x00000f00) >> 8;
- if (pclk >= 165000)
+ if (pclk >= 165000 && outp->info.duallink_possible)
*conf |= 0x0100;
break;
case DCB_OUTPUT_LVDS:
--
2.4.10
Ilia Mirkin
2015-Nov-03 22:41 UTC
[Nouveau] [PATCH 2/2] connector: allow 225/297MHz pixel clocks for HDMI on Fermi/Kepler
Some Fermi's apparently alow allow 297MHz clocks, so create a parameter
which allows end-users to set it themselves until we have a reliable way
to determine the board's maximum pixel clocks.
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
drm/nouveau/nouveau_connector.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drm/nouveau/nouveau_connector.c b/drm/nouveau/nouveau_connector.c
index 4c8f6ef..f5806eb 100644
--- a/drm/nouveau/nouveau_connector.c
+++ b/drm/nouveau/nouveau_connector.c
@@ -56,6 +56,10 @@ MODULE_PARM_DESC(duallink, "Allow dual-link TMDS
(default: enabled)");
int nouveau_duallink = 1;
module_param_named(duallink, nouveau_duallink, int, 0400);
+MODULE_PARM_DESC(hdmimhz, "Force a maximum HDMI pixel clock (in
MHz)");
+int nouveau_hdmimhz = 0;
+module_param_named(hdmimhz, nouveau_hdmimhz, int, 0400);
+
struct nouveau_encoder *
find_encoder(struct drm_connector *connector, int type)
{
@@ -815,6 +819,17 @@ get_tmds_link_bandwidth(struct drm_connector *connector)
struct nouveau_drm *drm = nouveau_drm(connector->dev);
struct dcb_output *dcb = nv_connector->detected_encoder->dcb;
+ if (drm_detect_hdmi_monitor(nv_connector->edid)) {
+ 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->device.info.family >= NV_DEVICE_INFO_V0_KEPLER)
+ return 297000;
+ if (drm->device.info.family >= NV_DEVICE_INFO_V0_FERMI)
+ return 225000;
+ }
if (dcb->location != DCB_LOC_ON_CHIP ||
drm->device.info.chipset >= 0x46)
return 165000;
--
2.4.10
Ben Skeggs
2015-Nov-04 00:02 UTC
[Nouveau] [PATCH 1/2] disp: activate dual link TMDS links only when possible
On 11/04/2015 08:41 AM, Ilia Mirkin wrote:> From: Hauke Mehrtens <hauke at hauke-m.de> > > Without this patch a pixel clock rate above 165 MHz on a TMDS link is > assumed to be dual link. This is true for DVI, but not for HDMI. HDMI > supports no dual link, but it supports pixel clock rates above 165 MHz. > Only activate Dual Link mode when it is actual possible. > > Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de> > Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> > --- > drm/nouveau/nv50_display.c | 8 ++++---- > drm/nouveau/nvkm/engine/disp/gf119.c | 2 +- > drm/nouveau/nvkm/engine/disp/nv50.c | 2 +- > 3 files changed, 6 insertions(+), 6 deletions(-) > > diff --git a/drm/nouveau/nv50_display.c b/drm/nouveau/nv50_display.c > index c053c50..93bcfdf 100644 > --- a/drm/nouveau/nv50_display.c > +++ b/drm/nouveau/nv50_display.c > @@ -1961,10 +1961,10 @@ nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *umode, > switch (nv_encoder->dcb->type) { > case DCB_OUTPUT_TMDS: > if (nv_encoder->dcb->sorconf.link & 1) { > - if (mode->clock < 165000) > - proto = 0x1; > - else > - proto = 0x5; > + proto = 0x1; > + if (mode->clock >= 165000 && > + nv_encoder->dcb->duallink_possible) > + proto |= 0x4;This is a somewhat flaky condition, given that one could plug a single-link HDMI monitor into a duallink-capable TMDS connector. Still, it's an improvement :)> } else { > proto = 0x2; > } > diff --git a/drm/nouveau/nvkm/engine/disp/gf119.c b/drm/nouveau/nvkm/engine/disp/gf119.c > index 186fd3a..8691b68 100644 > --- a/drm/nouveau/nvkm/engine/disp/gf119.c > +++ b/drm/nouveau/nvkm/engine/disp/gf119.c > @@ -158,7 +158,7 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32 pclk, u32 *conf) > switch (outp->info.type) { > case DCB_OUTPUT_TMDS: > *conf = (ctrl & 0x00000f00) >> 8; > - if (pclk >= 165000) > + if (pclk >= 165000 && outp->info.duallink_possible) > *conf |= 0x0100;I think it might be more robust to key this off the SOR protocol, rather than duplicating the condition above.> break; > case DCB_OUTPUT_LVDS: > diff --git a/drm/nouveau/nvkm/engine/disp/nv50.c b/drm/nouveau/nvkm/engine/disp/nv50.c > index 32e73a9..ceecd0e 100644 > --- a/drm/nouveau/nvkm/engine/disp/nv50.c > +++ b/drm/nouveau/nvkm/engine/disp/nv50.c > @@ -391,7 +391,7 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32 pclk, u32 *conf) > switch (outp->info.type) { > case DCB_OUTPUT_TMDS: > *conf = (ctrl & 0x00000f00) >> 8; > - if (pclk >= 165000) > + if (pclk >= 165000 && outp->info.duallink_possible) > *conf |= 0x0100;Same here.> break; > case DCB_OUTPUT_LVDS: >-------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: OpenPGP digital signature URL: <http://lists.freedesktop.org/archives/nouveau/attachments/20151104/6d360296/attachment.sig>
Ilia Mirkin
2015-Nov-04 00:37 UTC
[Nouveau] [PATCH 1/2] disp: activate dual link TMDS links only when possible
On Tue, Nov 3, 2015 at 7:02 PM, Ben Skeggs <skeggsb at gmail.com> wrote:> On 11/04/2015 08:41 AM, Ilia Mirkin wrote: >> From: Hauke Mehrtens <hauke at hauke-m.de> >> >> Without this patch a pixel clock rate above 165 MHz on a TMDS link is >> assumed to be dual link. This is true for DVI, but not for HDMI. HDMI >> supports no dual link, but it supports pixel clock rates above 165 MHz. >> Only activate Dual Link mode when it is actual possible. >> >> Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de> >> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> >> --- >> drm/nouveau/nv50_display.c | 8 ++++---- >> drm/nouveau/nvkm/engine/disp/gf119.c | 2 +- >> drm/nouveau/nvkm/engine/disp/nv50.c | 2 +- >> 3 files changed, 6 insertions(+), 6 deletions(-) >> >> diff --git a/drm/nouveau/nv50_display.c b/drm/nouveau/nv50_display.c >> index c053c50..93bcfdf 100644 >> --- a/drm/nouveau/nv50_display.c >> +++ b/drm/nouveau/nv50_display.c >> @@ -1961,10 +1961,10 @@ nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *umode, >> switch (nv_encoder->dcb->type) { >> case DCB_OUTPUT_TMDS: >> if (nv_encoder->dcb->sorconf.link & 1) { >> - if (mode->clock < 165000) >> - proto = 0x1; >> - else >> - proto = 0x5; >> + proto = 0x1; >> + if (mode->clock >= 165000 && >> + nv_encoder->dcb->duallink_possible) >> + proto |= 0x4; > This is a somewhat flaky condition, given that one could plug a > single-link HDMI monitor into a duallink-capable TMDS connector. > > Still, it's an improvement :)Yeah, FWIW I thought of that (for the second patch too). All this stuff is pretty fragile. But... what are you gonna do. Is there some other way of telling whether we're on HDMI or DVI?> >> } else { >> proto = 0x2; >> } >> diff --git a/drm/nouveau/nvkm/engine/disp/gf119.c b/drm/nouveau/nvkm/engine/disp/gf119.c >> index 186fd3a..8691b68 100644 >> --- a/drm/nouveau/nvkm/engine/disp/gf119.c >> +++ b/drm/nouveau/nvkm/engine/disp/gf119.c >> @@ -158,7 +158,7 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32 pclk, u32 *conf) >> switch (outp->info.type) { >> case DCB_OUTPUT_TMDS: >> *conf = (ctrl & 0x00000f00) >> 8; >> - if (pclk >= 165000) >> + if (pclk >= 165000 && outp->info.duallink_possible) >> *conf |= 0x0100; > I think it might be more robust to key this off the SOR protocol, rather > than duplicating the condition above.You mean disp->sor.lvdsconf? What do I do with that? Or did you have something else in mind?> >> break; >> case DCB_OUTPUT_LVDS: >> diff --git a/drm/nouveau/nvkm/engine/disp/nv50.c b/drm/nouveau/nvkm/engine/disp/nv50.c >> index 32e73a9..ceecd0e 100644 >> --- a/drm/nouveau/nvkm/engine/disp/nv50.c >> +++ b/drm/nouveau/nvkm/engine/disp/nv50.c >> @@ -391,7 +391,7 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32 pclk, u32 *conf) >> switch (outp->info.type) { >> case DCB_OUTPUT_TMDS: >> *conf = (ctrl & 0x00000f00) >> 8; >> - if (pclk >= 165000) >> + if (pclk >= 165000 && outp->info.duallink_possible) >> *conf |= 0x0100; > Same here. > >> break; >> case DCB_OUTPUT_LVDS: >> >
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