diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2014-03-20 09:28:00 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2014-03-26 14:08:20 +1000 |
| commit | fc243d7f92d95d961186126efaad36197f133ab1 (patch) | |
| tree | 2dcd036eb24e5410d2f70686e533326397f0e55a /drivers/gpu/drm | |
| parent | 5ca929b9523bd4b4ce06812fb0d77cafc3043795 (diff) | |
drm/nouveau/disp: limit dp capabilities as per dcb
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/engine/disp/dport.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/bios/dcb.c | 29 |
2 files changed, 36 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/dport.c b/drivers/gpu/drm/nouveau/core/engine/disp/dport.c index 1bd4c63369c..2aedb4e47d0 100644 --- a/drivers/gpu/drm/nouveau/core/engine/disp/dport.c +++ b/drivers/gpu/drm/nouveau/core/engine/disp/dport.c @@ -312,6 +312,14 @@ nouveau_dp_train(struct nouveau_disp *disp, const struct nouveau_dp_func *func, ERR("failed to read DPCD\n"); } + /* bring capabilities within encoder limits */ + if ((dp->dpcd[2] & 0x1f) > dp->outp->dpconf.link_nr) { + dp->dpcd[2] &= ~0x1f; + dp->dpcd[2] |= dp->outp->dpconf.link_nr; + } + if (dp->dpcd[1] > dp->outp->dpconf.link_bw) + dp->dpcd[1] = dp->outp->dpconf.link_bw; + /* adjust required bandwidth for 8B/10B coding overhead */ datarate = (datarate / 8) * 10; diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/dcb.c b/drivers/gpu/drm/nouveau/core/subdev/bios/dcb.c index 2d9b9d7a799..88606bfaf84 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/bios/dcb.c +++ b/drivers/gpu/drm/nouveau/core/subdev/bios/dcb.c @@ -142,9 +142,36 @@ dcb_outp_parse(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len, if (*ver >= 0x40) { u32 conf = nv_ro32(bios, dcb + 0x04); switch (outp->type) { + case DCB_OUTPUT_DP: + switch (conf & 0x00e00000) { + case 0x00000000: + outp->dpconf.link_bw = 0x06; + break; + case 0x00200000: + outp->dpconf.link_bw = 0x0a; + break; + case 0x00400000: + default: + outp->dpconf.link_bw = 0x14; + break; + } + + switch (conf & 0x0f000000) { + case 0x0f000000: + outp->dpconf.link_nr = 4; + break; + case 0x03000000: + outp->dpconf.link_nr = 2; + break; + case 0x01000000: + default: + outp->dpconf.link_nr = 1; + break; + } + + /* fall-through... */ case DCB_OUTPUT_TMDS: case DCB_OUTPUT_LVDS: - case DCB_OUTPUT_DP: outp->link = (conf & 0x00000030) >> 4; outp->sorconf.link = outp->link; /*XXX*/ outp->extdev = 0x00; |