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drm/nv50: prevent accidently turning off encoders we're actually using 

On most cards the DisplayPort connector is created with 2 encoders sharing
a single SOR (for native DP, and for DVI-over-DP).  The previous logic
for turning off unused encoders didn't take into account that we could
have multiple drm_encoders on a single hw encoder and ended up turning off
encoders that were actually being used still.

This patch fixes that issue.  We probably want to look at something a bit
better later on, and only expose one drm_encoder per hw encoder block.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-01-18 08:52:35 +10:00
parent 134f248bea
commit 58d65b84de
1 changed files with 21 additions and 1 deletions
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22
drivers/gpu/drm/nouveau/nv50_crtc.c
View File

@ -432,6 +432,7 @@ nv50_crtc_prepare(struct drm_crtc *crtc)
struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct drm_encoder *encoder;
uint32_t dac = 0, sor = 0;
NV_DEBUG_KMS(dev, "index %d\n", nv_crtc->index);
@ -439,9 +440,28 @@ nv50_crtc_prepare(struct drm_crtc *crtc)
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
if (drm_helper_encoder_in_use(encoder))
if (!drm_helper_encoder_in_use(encoder))
continue;
if (nv_encoder->dcb->type == OUTPUT_ANALOG ||
nv_encoder->dcb->type == OUTPUT_TV)
dac |= (1 << nv_encoder->or);
else
sor |= (1 << nv_encoder->or);
}
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
if (nv_encoder->dcb->type == OUTPUT_ANALOG ||
nv_encoder->dcb->type == OUTPUT_TV) {
if (dac & (1 << nv_encoder->or))
continue;
} else {
if (sor & (1 << nv_encoder->or))
continue;
}
nv_encoder->disconnect(nv_encoder);
}