Merge "drm/msm/sde: trigger null commit if a display stuck in cont-splash" (30a8f341) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/gpu/drm/msm/sde/sde_kms.c

+77 −0

Original line number	Diff line number	Diff line
		@@ -77,6 +77,9 @@ static const char * const iommu_ports[] = {
		#define SDE_DEBUGFS_DIR "msm_sde"
		#define SDE_DEBUGFS_HWMASKNAME "hw_log_mask"

		#define SDE_KMS_MODESET_LOCK_TIMEOUT_US 500
		#define SDE_KMS_MODESET_LOCK_MAX_TRIALS 20

		/**
		* sdecustom - enable certain driver customizations for sde clients
		* Enabling this modifies the standard DRM behavior slightly and assumes
		@@ -2618,11 +2621,79 @@ static bool sde_kms_check_for_splash(struct msm_kms *kms)
		return sde_kms->splash_data.num_splash_displays;
		}

		static void _sde_kms_null_commit(struct drm_device *dev,
		struct drm_encoder *enc)
		{
		struct drm_modeset_acquire_ctx ctx;
		struct drm_connector *conn = NULL;
		struct drm_connector *tmp_conn = NULL;
		struct drm_connector_list_iter conn_iter;
		struct drm_atomic_state *state = NULL;
		struct drm_crtc_state *crtc_state = NULL;
		struct drm_connector_state *conn_state = NULL;
		int retry_cnt = 0;
		int ret = 0;

		drm_modeset_acquire_init(&ctx, 0);

		retry:
		ret = drm_modeset_lock_all_ctx(dev, &ctx);
		if (ret == -EDEADLK && retry_cnt < SDE_KMS_MODESET_LOCK_MAX_TRIALS) {
		drm_modeset_backoff(&ctx);
		retry_cnt++;
		udelay(SDE_KMS_MODESET_LOCK_TIMEOUT_US);
		goto retry;
		} else if (WARN_ON(ret)) {
		goto end;
		}

		state = drm_atomic_state_alloc(dev);
		if (!state) {
		DRM_ERROR("failed to allocate atomic state, %d\n", ret);
		goto end;
		}

		state->acquire_ctx = &ctx;
		drm_connector_list_iter_begin(dev, &conn_iter);
		drm_for_each_connector_iter(tmp_conn, &conn_iter) {
		if (enc == tmp_conn->state->best_encoder) {
		conn = tmp_conn;
		break;
		}
		}
		drm_connector_list_iter_end(&conn_iter);

		if (!conn) {
		SDE_ERROR("error in finding conn for enc:%d\n", DRMID(enc));
		goto end;
		}

		crtc_state = drm_atomic_get_crtc_state(state, enc->crtc);
		conn_state = drm_atomic_get_connector_state(state, conn);
		if (IS_ERR(conn_state)) {
		SDE_ERROR("error %d getting connector %d state\n",
		ret, DRMID(conn));
		goto end;
		}

		crtc_state->active = true;
		drm_atomic_set_crtc_for_connector(conn_state, enc->crtc);

		drm_atomic_commit(state);
		end:
		if (state)
		drm_atomic_state_put(state);

		drm_modeset_drop_locks(&ctx);
		drm_modeset_acquire_fini(&ctx);
		}

		static int sde_kms_pm_suspend(struct device *dev)
		{
		struct drm_device *ddev;
		struct drm_modeset_acquire_ctx ctx;
		struct drm_connector *conn;
		struct drm_encoder *enc;
		struct drm_connector_list_iter conn_iter;
		struct drm_atomic_state *state = NULL;
		struct sde_kms *sde_kms;
		@@ -2641,6 +2712,12 @@ static int sde_kms_pm_suspend(struct device *dev)
		/* disable hot-plug polling */
		drm_kms_helper_poll_disable(ddev);

		/* if a display stuck in CS trigger a null commit to complete handoff */
		drm_for_each_encoder(enc, ddev) {
		if (sde_encoder_in_cont_splash(enc) && enc->crtc)
		_sde_kms_null_commit(ddev, enc);
		}

		/* acquire modeset lock(s) */
		drm_modeset_acquire_init(&ctx, 0);