diff options
| author |   Ben Skeggs <bskeggs@redhat.com> | 2021-11-23 18:17:56 +1000 |
|---|---|---|
| committer |   Karol Herbst <kherbst@redhat.com> | 2021-12-16 18:46:10 +0100 |
| commit | 9543e3c0511da64a77b1af3ab1f7199c39226e1b (patch) | |
| tree | f10a215673a975ca38771dbafa5f080c34d2ae1c | |
| parent | drm/nouveau/disp/dp: add support for tps4 (diff) | |
| download | linux-dev-9543e3c0511da64a77b1af3ab1f7199c39226e1b.tar.xz linux-dev-9543e3c0511da64a77b1af3ab1f7199c39226e1b.zip | |
drm/nouveau/disp/dp: fixup cr/eq delays for 1.4
Also use usleep_range() instead of [um]delay() to be a bit nicer.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Link: https://gitlab.freedesktop.org/drm/nouveau/-/merge_requests/17
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h | 3 |
2 files changed, 12 insertions, 9 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c index 565ee63c0f1d..eee2451123c9 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c @@ -54,10 +54,7 @@ nvkm_dp_train_sense(struct lt_state *lt, bool pc, u32 delay) struct nvkm_dp *dp = lt->dp; int ret; - if (dp->dpcd[DPCD_RC0E_AUX_RD_INTERVAL]) - mdelay(dp->dpcd[DPCD_RC0E_AUX_RD_INTERVAL] * 4); - else - udelay(delay); + usleep_range(delay, delay * 2); ret = nvkm_rdaux(dp->aux, DPCD_LS02, lt->stat, 6); if (ret) @@ -166,7 +163,7 @@ static int nvkm_dp_train_eq(struct lt_state *lt) { bool eq_done = false, cr_done = true; - int tries = 0, i; + int tries = 0, usec = 0, i; { if (lt->dp->dpcd[DPCD_RC00_DPCD_REV] >= 0x14 && @@ -178,12 +175,14 @@ nvkm_dp_train_eq(struct lt_state *lt) nvkm_dp_train_pattern(lt, 3); else nvkm_dp_train_pattern(lt, 2); + + usec = (lt->dp->dpcd[DPCD_RC0E] & DPCD_RC0E_AUX_RD_INTERVAL) * 4000; } do { if ((tries && nvkm_dp_train_drive(lt, lt->pc2)) || - nvkm_dp_train_sense(lt, lt->pc2, 400)) + nvkm_dp_train_sense(lt, lt->pc2, usec ? usec : 400)) break; eq_done = !!(lt->stat[2] & DPCD_LS04_INTERLANE_ALIGN_DONE); @@ -205,13 +204,16 @@ nvkm_dp_train_cr(struct lt_state *lt) { bool cr_done = false, abort = false; int voltage = lt->conf[0] & DPCD_LC03_VOLTAGE_SWING_SET; - int tries = 0, i; + int tries = 0, usec = 0, i; nvkm_dp_train_pattern(lt, 1); + if (lt->dp->dpcd[DPCD_RC00_DPCD_REV] < 0x14) + usec = (lt->dp->dpcd[DPCD_RC0E] & DPCD_RC0E_AUX_RD_INTERVAL) * 4000; + do { if (nvkm_dp_train_drive(lt, false) || - nvkm_dp_train_sense(lt, false, 100)) + nvkm_dp_train_sense(lt, false, usec ? usec : 100)) break; cr_done = true; diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h index 1becf9da3ed7..104f847b5abf 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h @@ -47,7 +47,8 @@ void nvkm_dp_disable(struct nvkm_outp *, struct nvkm_ior *); #define DPCD_RC03 0x00003 #define DPCD_RC03_TPS4_SUPPORTED 0x80 #define DPCD_RC03_MAX_DOWNSPREAD 0x01 -#define DPCD_RC0E_AUX_RD_INTERVAL 0x0000e +#define DPCD_RC0E 0x0000e +#define DPCD_RC0E_AUX_RD_INTERVAL 0x7f /* DPCD Link Configuration */ #define DPCD_LC00_LINK_BW_SET 0x00100 |