drm/nv17-nv4x: Attempt to init some external TMDS transmitters.

sil164 and friends are the most common, usually they just need to be
poked once because a fixed configuration is enough for any modes and
clocks, so they worked without this patch if the BIOS had done a good
job on POST. Display couldn't survive a suspend/resume cycle though.
Unfortunately, BIOS scripts are useless here.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv04_crtc.c b/drivers/gpu/drm/nouveau/nv04_crtc.c
index 1c20c08ce67..08c7e073edc 100644
--- a/drivers/gpu/drm/nouveau/nv04_crtc.c
+++ b/drivers/gpu/drm/nouveau/nv04_crtc.c
@@ -542,6 +542,9 @@ nv_crtc_mode_set_regs(struct drm_crtc *crtc, struct drm_display_mode * mode)
          * 1 << 30 on 0x60.830), for no apparent reason */
         regp->CRTC[NV_CIO_CRE_59] = off_chip_digital;
 
+        if (dev_priv->card_type >= NV_30)
+                regp->CRTC[0x9f] = off_chip_digital ? 0x11 : 0x1;
+
         regp->crtc_830 = mode->crtc_vdisplay - 3;
         regp->crtc_834 = mode->crtc_vdisplay - 1;