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drm/nouveau/kms/gt215-: fix race with audio driver runpm 

The audio driver can call into nouveau right while we're in the middle
of re-fetching the EDID, and decide it no longer needs to be awake.

Stop depending on EDID in the audio component get_eld() callback, and
instead cache whether audio support is present from the prior modeset.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2020-05-29 17:57:29 +10:00
parent a1ef8bad50
commit 0ad679d157
2 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/nouveau/dispnv50/disp.c
View File

@ -510,7 +510,7 @@ nv50_audio_component_get_eld(struct device *kdev, int port, int dev_id,
if (!nv_connector || !nv_crtc || nv_encoder->or != port ||
nv_crtc->index != dev_id)
continue;
*enabled = drm_detect_monitor_audio(nv_connector->edid);
*enabled = nv_encoder->audio;
if (*enabled) {
ret = drm_eld_size(nv_connector->base.eld);
memcpy(buf, nv_connector->base.eld,
@ -600,6 +600,7 @@ nv50_audio_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
(0x0100 << nv_crtc->index),
};
nv_encoder->audio = false;
nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
nv50_audio_component_eld_notify(drm->audio.component, nv_encoder->or,
@ -636,6 +637,7 @@ nv50_audio_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
nvif_mthd(&disp->disp->object, 0, &args,
sizeof(args.base) + drm_eld_size(args.data));
nv_encoder->audio = true;
nv50_audio_component_eld_notify(drm->audio.component, nv_encoder->or,
nv_crtc->index);

1
drivers/gpu/drm/nouveau/nouveau_encoder.h
View File

@ -52,6 +52,7 @@ struct nouveau_encoder {
* actually programmed on the hw, not the proposed crtc */
struct drm_crtc *crtc;
u32 ctrl;
bool audio;
struct drm_display_mode mode;
int last_dpms;