Op 01-02-16 om 17:08 schreef Ville Syrjälä:
> On Mon, Feb 01, 2016 at 02:43:57PM +0100, Maarten Lankhorst wrote:
>> Instead of restoring dpms and a flag for whether a temp fb is allocated
>> duplicate
>> the old plane_state and crtc_state, and restore the members we potentially
>> touched.
>>
>> Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
>> ---
>> drivers/gpu/drm/i915/intel_display.c | 128
>> ++++++++++++++++++++---------------
>> drivers/gpu/drm/i915/intel_drv.h | 4 +-
>> 2 files changed, 76 insertions(+), 56 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_display.c
>> b/drivers/gpu/drm/i915/intel_display.c
>> index 4d8c9f7857db..0702ce8ec36a 100644
>> --- a/drivers/gpu/drm/i915/intel_display.c
>> +++ b/drivers/gpu/drm/i915/intel_display.c
>> @@ -10361,6 +10361,7 @@ 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;
>> @@ -10426,6 +10427,9 @@ 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;
>> @@ -10441,24 +10445,15 @@ 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) */
>> @@ -10466,8 +10461,15 @@ retry:
>> i++;
>> if (!(encoder->possible_crtcs & (1 << i)))
>> continue;
>> - if (possible_crtc->state->enable)
>> +
>> + ret = drm_modeset_lock(&possible_crtc->mutex, ctx);
>> + if (ret)
>> + goto fail;
>> +
>> + if (possible_crtc->state->enable) {
>> + drm_modeset_unlock(&possible_crtc->mutex);
>> continue;
>> + }
>>
>> crtc = possible_crtc;
>> break;
>> @@ -10481,17 +10483,19 @@ 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)
>> @@ -10505,7 +10509,9 @@ 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)) {
>> @@ -10529,7 +10535,6 @@ 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)) {
>> @@ -10541,15 +10546,16 @@ 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);
>> @@ -10559,6 +10565,12 @@ 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;
>> @@ -10575,61 +10587,69 @@ 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;
> This part looks messy. I don't think there's any reason anyone
> interested in load detection should need to do these sort of
> gymnastics manually. So there really should be some kind of nice
> thing to just tell atomic that:
> "i have this old plane/crtc/connector/etc. state here, please
> just restore it"
We could create 2 atomic states, update the first one, and commit the second
one in release_load_detect_pipe.
~Maarten
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