* Re: [PATCH] drm/i915: Assign crtc correctly in load detection.
2016-01-12 12:34 ` Daniel Vetter
@ 2016-01-12 13:20 ` Maarten Lankhorst
0 siblings, 0 replies; 3+ messages in thread
From: Maarten Lankhorst @ 2016-01-12 13:20 UTC (permalink / raw)
To: Daniel Vetter; +Cc: Intel Graphics Development, dri-devel@lists.freedesktop.org
Op 12-01-16 om 13:34 schreef Daniel Vetter:
> On Tue, Jan 12, 2016 at 12:35:59PM +0100, Maarten Lankhorst wrote:
>> drm_atomic_set_crtc_for_connector should be used,
>> and crtc->primary->crtc is assigned by atomic_commit.
>>
>> Rely on the helpers for setting this correctly, so
>> connector_mask gets updated too.
>>
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
After examining the code some more I think this fix is incomplete.
It also needs to do the same on release and if you set i915.nuclear_pageflip you'll get a WARN since mode_blob's not set.
Fixing this will break release_load_detect which doesn't unset it.
Would the code work?
Cc'ing Ville since he may be able to test it.
--- >8 ---
drm/i915: Use atomic state to obtain load detection crtc.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bc2ec444925e..9eb1f4e263c6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10409,6 +10409,7 @@ mode_fits_in_fbdev(struct drm_device *dev,
if (obj->base.size < mode->vdisplay * fb->pitches[0])
return NULL;
+ drm_framebuffer_reference(fb);
return fb;
#else
return NULL;
@@ -10474,6 +10475,9 @@ bool intel_get_load_detect_pipe(struct drm_connector *connector,
encoder->base.id, encoder->name);
retry:
+ old->old_pipe_config = NULL;
+ old->old_plane_state = NULL;
+
ret = drm_modeset_lock(&config->connection_mutex, ctx);
if (ret)
goto fail;
@@ -10489,24 +10493,15 @@ retry:
*/
/* See if we already have a CRTC for this connector */
- if (encoder->crtc) {
- crtc = encoder->crtc;
+ if (connector->state->crtc) {
+ crtc = connector->state->crtc;
ret = drm_modeset_lock(&crtc->mutex, ctx);
if (ret)
goto fail;
- ret = drm_modeset_lock(&crtc->primary->mutex, ctx);
- if (ret)
- goto fail;
-
- old->dpms_mode = connector->dpms;
- old->load_detect_temp = false;
/* Make sure the crtc and connector are running */
- if (connector->dpms != DRM_MODE_DPMS_ON)
- connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
-
- return true;
+ goto found;
}
/* Find an unused one (if possible) */
@@ -10514,8 +10509,15 @@ retry:
i++;
if (!(encoder->possible_crtcs & (1 << i)))
continue;
- if (possible_crtc->state->enable)
+
+ ret = drm_modeset_lock(&crtc->mutex, ctx);
+ if (ret)
+ goto fail;
+
+ if (possible_crtc->state->enable) {
+ drm_modeset_unlock(&crtc->mutex);
continue;
+ }
crtc = possible_crtc;
break;
@@ -10529,17 +10531,19 @@ retry:
goto fail;
}
- ret = drm_modeset_lock(&crtc->mutex, ctx);
- if (ret)
- goto fail;
+found:
+ intel_crtc = to_intel_crtc(crtc);
+
ret = drm_modeset_lock(&crtc->primary->mutex, ctx);
if (ret)
goto fail;
- intel_crtc = to_intel_crtc(crtc);
- old->dpms_mode = connector->dpms;
- old->load_detect_temp = true;
- old->release_fb = NULL;
+ old->old_pipe_config = intel_crtc_duplicate_state(crtc);
+ old->old_plane_state = intel_plane_duplicate_state(crtc->primary);
+ if (!old->old_pipe_config || !old->old_plane_state) {
+ ret = -ENOMEM;
+ goto fail;
+ }
state = drm_atomic_state_alloc(dev);
if (!state)
@@ -10553,7 +10557,9 @@ retry:
goto fail;
}
- connector_state->crtc = crtc;
+ ret = drm_atomic_set_crtc_for_connector(connector_state, crtc);
+ if (ret)
+ goto fail;
crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
if (IS_ERR(crtc_state)) {
@@ -10577,7 +10583,6 @@ retry:
if (fb == NULL) {
DRM_DEBUG_KMS("creating tmp fb for load-detection\n");
fb = intel_framebuffer_create_for_mode(dev, mode, 24, 32);
- old->release_fb = fb;
} else
DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
if (IS_ERR(fb)) {
@@ -10589,15 +10594,16 @@ retry:
if (ret)
goto fail;
- drm_mode_copy(&crtc_state->base.mode, mode);
+ drm_framebuffer_unreference(fb);
+
+ ret = drm_atomic_set_mode_for_crtc(&crtc_state->base, mode);
+ if (ret)
+ goto fail;
if (drm_atomic_commit(state)) {
DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
- if (old->release_fb)
- old->release_fb->funcs->destroy(old->release_fb);
goto fail;
}
- crtc->primary->crtc = crtc;
/* let the connector get through one full cycle before testing */
intel_wait_for_vblank(dev, intel_crtc->pipe);
@@ -10607,6 +10613,12 @@ fail:
drm_atomic_state_free(state);
state = NULL;
+ if (old->old_pipe_config)
+ intel_crtc_destroy_state(crtc, old->old_pipe_config);
+
+ if (old->old_plane_state)
+ intel_plane_destroy_state(crtc->primary, old->old_plane_state);
+
if (ret == -EDEADLK) {
drm_modeset_backoff(ctx);
goto retry;
@@ -10623,61 +10635,69 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
struct intel_encoder *intel_encoder =
intel_attached_encoder(connector);
struct drm_encoder *encoder = &intel_encoder->base;
- struct drm_crtc *crtc = encoder->crtc;
+ struct drm_crtc *crtc = connector->state->crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_atomic_state *state;
struct drm_connector_state *connector_state;
struct intel_crtc_state *crtc_state;
+ struct drm_plane_state *plane_state;
int ret;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
connector->base.id, connector->name,
encoder->base.id, encoder->name);
- if (old->load_detect_temp) {
- state = drm_atomic_state_alloc(dev);
- if (!state)
- goto fail;
+ if (!old->old_pipe_config)
+ return;
- state->acquire_ctx = ctx;
+ state = drm_atomic_state_alloc(dev);
+ if (!state)
+ goto fail;
- connector_state = drm_atomic_get_connector_state(state, connector);
- if (IS_ERR(connector_state))
- goto fail;
+ state->acquire_ctx = ctx;
- crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
- if (IS_ERR(crtc_state))
- goto fail;
+ connector_state = drm_atomic_get_connector_state(state, connector);
+ if (IS_ERR(connector_state))
+ goto fail;
- connector_state->crtc = NULL;
+ crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
+ if (IS_ERR(crtc_state))
+ goto fail;
- crtc_state->base.enable = crtc_state->base.active = false;
+ plane_state = drm_atomic_get_plane_state(state, crtc->primary);
+ if (IS_ERR(plane_state))
+ goto fail;
- ret = intel_modeset_setup_plane_state(state, crtc, NULL, NULL,
- 0, 0);
+ if (!old->old_pipe_config->enable) {
+ ret = drm_atomic_set_crtc_for_connector(connector_state, NULL);
if (ret)
goto fail;
+ }
- ret = drm_atomic_commit(state);
- if (ret)
- goto fail;
+ crtc_state->base.enable = old->old_pipe_config->enable;
+ crtc_state->base.active = old->old_pipe_config->active;
- if (old->release_fb) {
- drm_framebuffer_unregister_private(old->release_fb);
- drm_framebuffer_unreference(old->release_fb);
- }
+ drm_atomic_set_fb_for_plane(plane_state, old->old_plane_state->fb);
+ ret = drm_atomic_set_crtc_for_plane(plane_state, old->old_plane_state->crtc);
+ if (ret)
+ goto fail;
- return;
- }
+ old->old_plane_state->state = plane_state->state;
+ *plane_state = *old->old_plane_state;
- /* Switch crtc and encoder back off if necessary */
- if (old->dpms_mode != DRM_MODE_DPMS_ON)
- connector->funcs->dpms(connector, old->dpms_mode);
+ ret = drm_atomic_commit(state);
+ if (ret)
+ goto fail;
+ intel_plane_destroy_state(crtc->primary, old->old_plane_state);
+ intel_crtc_destroy_state(crtc, old->old_pipe_config);
return;
+
fail:
DRM_DEBUG_KMS("Couldn't release load detect pipe.\n");
drm_atomic_state_free(state);
+ intel_plane_destroy_state(crtc->primary, old->old_plane_state);
+ intel_crtc_destroy_state(crtc, old->old_pipe_config);
}
static int i9xx_pll_refclk(struct drm_device *dev,
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index bdfe4035e074..1361836139a5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -932,8 +932,8 @@ struct intel_unpin_work {
struct intel_load_detect_pipe {
struct drm_framebuffer *release_fb;
- bool load_detect_temp;
- int dpms_mode;
+ struct drm_crtc_state *old_pipe_config;
+ struct drm_plane_state *old_plane_state;
};
static inline struct intel_encoder *
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