1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
19  * msm_dp_bridge_detect - callback to determine if connector is connected
28 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_detect()
30 	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",  in msm_dp_bridge_detect()
31 		str_true_false(dp->link_ready));  in msm_dp_bridge_detect()
33 	return (dp->link_ready) ? connector_status_connected :  in msm_dp_bridge_detect()
44 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_atomic_check()
46 	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",  in msm_dp_bridge_atomic_check()
47 		str_true_false(dp->link_ready));  in msm_dp_bridge_atomic_check()
52 	 * Hence if the sink is unplugged, the pipeline gets disabled, but the  in msm_dp_bridge_atomic_check()
53 	 * crtc->active is still true. Any attempt to set the mode or manually  in msm_dp_bridge_atomic_check()
60 	if (bridge->ops & DRM_BRIDGE_OP_HPD)  in msm_dp_bridge_atomic_check()
61 		return (dp->link_ready) ? 0 : -ENOTCONN;  in msm_dp_bridge_atomic_check()
68  * msm_dp_bridge_get_modes - callback to add drm modes via drm_mode_probed_add()
81 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_get_modes()
84 	if (dp->link_ready) {  in msm_dp_bridge_get_modes()
87 			DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc);  in msm_dp_bridge_get_modes()
91 		drm_dbg_dp(connector->dev, "No sink connected\n");  in msm_dp_bridge_get_modes()
98 	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_debugfs_init()
129 	struct msm_dp *dp = to_dp_bridge(drm_bridge)->msm_dp_display;  in msm_edp_bridge_atomic_check()
132 		return -ENODEV;  in msm_edp_bridge_atomic_check()
134 	conn_state->self_refresh_aware = dp->psr_supported;  in msm_edp_bridge_atomic_check()
136 	if (!conn_state->crtc || !crtc_state)  in msm_edp_bridge_atomic_check()
139 	if (crtc_state->self_refresh_active && !dp->psr_supported)  in msm_edp_bridge_atomic_check()
140 		return -EINVAL;  in msm_edp_bridge_atomic_check()
151 	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;  in msm_edp_bridge_atomic_enable()
160 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_enable()
166 	if (old_crtc_state && old_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_enable()
180 	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;  in msm_edp_bridge_atomic_disable()
183 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_disable()
199 	 * call while the sink is in psr state. So, exit psr here.  in msm_edp_bridge_atomic_disable()
203 	 * We observed sink is stuck in self refresh if psr exit is skipped  in msm_edp_bridge_atomic_disable()
204 	 * when display disable occurs while the sink is in psr state.  in msm_edp_bridge_atomic_disable()
206 	if (new_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_disable()
209 	} else if (old_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_disable()
225 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_post_disable()
236 	if (new_crtc_state->self_refresh_active)  in msm_edp_bridge_atomic_post_disable()
243  * msm_edp_bridge_mode_valid - callback to determine if specified mode is valid
254 	int mode_pclk_khz = mode->clock;  in msm_edp_bridge_mode_valid()
256 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_edp_bridge_mode_valid()
258 	if (!dp || !mode_pclk_khz || !dp->connector) {  in msm_edp_bridge_mode_valid()
260 		return -EINVAL;  in msm_edp_bridge_mode_valid()
271 	 * enabling panel power to read sink capabilities. So, we rely  in msm_edp_bridge_mode_valid()
272 	 * on the panel driver to populate only supported modes for now.  in msm_edp_bridge_mode_valid()
279 	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_edp_bridge_debugfs_init()
304 	msm_dp_bridge = devm_drm_bridge_alloc(dev->dev, struct msm_dp_bridge, bridge,  in msm_dp_bridge_init()
305 					      msm_dp_display->is_edp ? &msm_edp_bridge_ops :  in msm_dp_bridge_init()
310 	msm_dp_bridge->msm_dp_display = msm_dp_display;  in msm_dp_bridge_init()
312 	bridge = &msm_dp_bridge->bridge;  in msm_dp_bridge_init()
313 	bridge->type = msm_dp_display->connector_type;  in msm_dp_bridge_init()
314 	bridge->ycbcr_420_allowed = yuv_supported;  in msm_dp_bridge_init()
317 	 * Many ops only make sense for DP. Why?  in msm_dp_bridge_init()
318 	 * - Detect/HPD are used by DRM to know if a display is _physically_  in msm_dp_bridge_init()
323 	 * - Currently eDP mode reading is driven by the panel driver. This  in msm_dp_bridge_init()
327 	if (!msm_dp_display->is_edp) {  in msm_dp_bridge_init()
328 		bridge->ops =  in msm_dp_bridge_init()
333 		bridge->hdmi_audio_dev = &msm_dp_display->pdev->dev;  in msm_dp_bridge_init()
334 		bridge->hdmi_audio_max_i2s_playback_channels = 8;  in msm_dp_bridge_init()
335 		bridge->hdmi_audio_dai_port = -1;  in msm_dp_bridge_init()
338 	rc = devm_drm_bridge_add(dev->dev, bridge);  in msm_dp_bridge_init()
352 	if (msm_dp_display->next_bridge) {  in msm_dp_bridge_init()
354 					msm_dp_display->next_bridge, bridge,  in msm_dp_bridge_init()
371 	connector = drm_bridge_connector_init(msm_dp_display->drm_dev, encoder);  in msm_dp_drm_connector_init()
375 	if (!msm_dp_display->is_edp)  in msm_dp_drm_connector_init()