[PATCH 3/5] drm/nouveau/disp: keep track of high-speed state, program into clock

[Ilia Mirkin]

The register programmed by the clock method needs to contain a different
setting for the link speed as well as special divider settings.

Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu>
---
 drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmigm200.c |  2 ++
 drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h       |  5 +++++
 drivers/gpu/drm/nouveau/nvkm/engine/disp/sorgf119.c  | 11 +++++++----
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmigm200.c 
b/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmigm200.c
index ad5f658c3f6d..9b16a08eb4d9 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmigm200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmigm200.c
@@ -31,4 +31,6 @@ gm200_hdmi_scdc(struct nvkm_ior *ior, int head, u8 scdc)
        const u32 ctrl = scdc & 0x3;
 
        nvkm_mask(device, 0x61c5bc + hoff, 0x00000003, ctrl);
+
+       ior->tmds.high_speed = !!(scdc & 0x2);
 }
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h 
b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h
index cf640141ad23..e2e0515a178c 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h
@@ -40,6 +40,11 @@ struct nvkm_ior {
                u8 nr;
                u8 bw;
        } dp;
+
+       /* Armed TMDS state. */
+       struct {
+               bool high_speed;
+       } tmds;
 };
 
 struct nvkm_ior_func {
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/sorgf119.c 
b/drivers/gpu/drm/nouveau/nvkm/engine/disp/sorgf119.c
index e6e6dfbb1283..456a5a143522 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/sorgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/sorgf119.c
@@ -120,13 +120,16 @@ void
 gf119_sor_clock(struct nvkm_ior *sor)
 {
        struct nvkm_device *device = sor->disp->engine.subdev.device;
-       const int  div = sor->asy.link == 3;
        const u32 soff = nv50_ior_base(sor);
+       u32 div1 = sor->asy.link == 3;
+       u32 div2 = sor->asy.link == 3;
        if (sor->asy.proto == TMDS) {
-               /* NFI why, but this sets DP_LINK_BW_2_7 when using TMDS. */
-               nvkm_mask(device, 0x612300 + soff, 0x007c0000, 0x0a << 18);
+               const u32 speed = sor->tmds.high_speed ? 0x14 : 0x0a;
+               nvkm_mask(device, 0x612300 + soff, 0x007c0000, speed << 18);
+               if (sor->tmds.high_speed)
+                       div2 = 1;
        }
-       nvkm_mask(device, 0x612300 + soff, 0x00000707, (div << 8) | div);
+       nvkm_mask(device, 0x612300 + soff, 0x00000707, (div2 << 8) | div1);
 }
 
 void
-- 
2.16.4

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