From 162265367a96d381f07066581d65e52627b08618 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Fri, 22 Jan 2010 10:57:01 +1000
Subject: [PATCH] drm/nv50: prevent switching off SOR when in use for
DVI-over-DP
Another hack because of us exposing each encoder block's function as
an encoder rather than exposing a single encoder that deals with them
all.
A proper fix will come, it's just rather invasive so this hack will
do until then.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
drivers/gpu/drm/nouveau/nv50_sor.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nv50_sor.c b/drivers/gpu/drm/nouveau/nv50_sor.c
index e395c16d30f5..ecf1936b8224 100644
--- a/drivers/gpu/drm/nouveau/nv50_sor.c
+++ b/drivers/gpu/drm/nouveau/nv50_sor.c
@@ -90,11 +90,24 @@ nv50_sor_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_device *dev = encoder->dev;
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+ struct drm_encoder *enc;
uint32_t val;
int or = nv_encoder->or;
NV_DEBUG_KMS(dev, "or %d mode %d\n", or, mode);
+ nv_encoder->last_dpms = mode;
+ list_for_each_entry(enc, &dev->mode_config.encoder_list, head) {
+ struct nouveau_encoder *nvenc = nouveau_encoder(enc);
+
+ if (nvenc == nv_encoder ||
+ nvenc->dcb->or != nv_encoder->dcb->or)
+ continue;
+
+ if (nvenc->last_dpms == DRM_MODE_DPMS_ON)
+ return;
+ }
+
/* wait for it to be done */
if (!nv_wait(NV50_PDISPLAY_SOR_DPMS_CTRL(or),
NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING, 0)) {