1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
17  * dp_bridge_detect - callback to determine if connector is connected
25 	dp = to_dp_bridge(bridge)->dp_display;  in dp_bridge_detect()
27 	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",  in dp_bridge_detect()
28 		(dp->link_ready) ? "true" : "false");  in dp_bridge_detect()
30 	return (dp->link_ready) ? connector_status_connected :  in dp_bridge_detect()
41 	dp = to_dp_bridge(bridge)->dp_display;  in dp_bridge_atomic_check()
43 	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",  in dp_bridge_atomic_check()
44 		(dp->link_ready) ? "true" : "false");  in dp_bridge_atomic_check()
50 	 * crtc->active is still true. Any attempt to set the mode or manually  in dp_bridge_atomic_check()
57 	if (bridge->ops & DRM_BRIDGE_OP_HPD)  in dp_bridge_atomic_check()
58 		return (dp->link_ready) ? 0 : -ENOTCONN;  in dp_bridge_atomic_check()
65  * dp_bridge_get_modes - callback to add drm modes via drm_mode_probed_add()
78 	dp = to_dp_bridge(bridge)->dp_display;  in dp_bridge_get_modes()
81 	if (dp->link_ready) {  in dp_bridge_get_modes()
88 		drm_dbg_dp(connector->dev, "No sink connected\n");  in dp_bridge_get_modes()
95 	struct msm_dp *dp = to_dp_bridge(bridge)->dp_display;  in dp_bridge_debugfs_init()
123 	struct msm_dp *dp = to_dp_bridge(drm_bridge)->dp_display;  in edp_bridge_atomic_check()
126 		return -ENODEV;  in edp_bridge_atomic_check()
128 	conn_state->self_refresh_aware = dp->psr_supported;  in edp_bridge_atomic_check()
130 	if (!conn_state->crtc || !crtc_state)  in edp_bridge_atomic_check()
133 	if (crtc_state->self_refresh_active && !dp->psr_supported)  in edp_bridge_atomic_check()
134 		return -EINVAL;  in edp_bridge_atomic_check()
142 	struct drm_atomic_state *atomic_state = old_bridge_state->base.state;  in edp_bridge_atomic_enable()
146 	struct msm_dp *dp = dp_bridge->dp_display;  in edp_bridge_atomic_enable()
155 						   drm_bridge->encoder);  in edp_bridge_atomic_enable()
161 	if (old_crtc_state && old_crtc_state->self_refresh_active) {  in edp_bridge_atomic_enable()
172 	struct drm_atomic_state *atomic_state = old_bridge_state->base.state;  in edp_bridge_atomic_disable()
176 	struct msm_dp *dp = dp_bridge->dp_display;  in edp_bridge_atomic_disable()
179 						   drm_bridge->encoder);  in edp_bridge_atomic_disable()
192 	 * Set self refresh mode if current crtc state is active.  in edp_bridge_atomic_disable()
199 	 * We observed sink is stuck in self refresh if psr exit is skipped  in edp_bridge_atomic_disable()
202 	if (new_crtc_state->self_refresh_active) {  in edp_bridge_atomic_disable()
205 	} else if (old_crtc_state->self_refresh_active) {  in edp_bridge_atomic_disable()
217 	struct drm_atomic_state *atomic_state = old_bridge_state->base.state;  in edp_bridge_atomic_post_disable()
222 						   drm_bridge->encoder);  in edp_bridge_atomic_post_disable()
231 	 * Self refresh mode is already set in edp_bridge_atomic_disable.  in edp_bridge_atomic_post_disable()
233 	if (new_crtc_state->self_refresh_active)  in edp_bridge_atomic_post_disable()
240  * edp_bridge_mode_valid - callback to determine if specified mode is valid
251 	int mode_pclk_khz = mode->clock;  in edp_bridge_mode_valid()
253 	dp = to_dp_bridge(bridge)->dp_display;  in edp_bridge_mode_valid()
255 	if (!dp || !mode_pclk_khz || !dp->connector) {  in edp_bridge_mode_valid()
257 		return -EINVAL;  in edp_bridge_mode_valid()
260 	if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)  in edp_bridge_mode_valid()
273 	struct msm_dp *dp = to_dp_bridge(bridge)->dp_display;  in edp_bridge_debugfs_init()
298 	dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);  in dp_bridge_init()
300 		return -ENOMEM;  in dp_bridge_init()
302 	dp_bridge->dp_display = dp_display;  in dp_bridge_init()
304 	bridge = &dp_bridge->bridge;  in dp_bridge_init()
305 	bridge->funcs = dp_display->is_edp ? &edp_bridge_ops : &dp_bridge_ops;  in dp_bridge_init()
306 	bridge->type = dp_display->connector_type;  in dp_bridge_init()
310 	 * - Detect/HPD are used by DRM to know if a display is _physically_  in dp_bridge_init()
311 	 *   there, not whether the display is powered on / finished initting.  in dp_bridge_init()
315 	 * - Currently eDP mode reading is driven by the panel driver. This  in dp_bridge_init()
319 	if (!dp_display->is_edp) {  in dp_bridge_init()
320 		bridge->ops =  in dp_bridge_init()
326 	rc = devm_drm_bridge_add(dev->dev, bridge);  in dp_bridge_init()
340 	if (dp_display->next_bridge) {  in dp_bridge_init()
342 					dp_display->next_bridge, bridge,  in dp_bridge_init()
359 	connector = drm_bridge_connector_init(dp_display->drm_dev, encoder);  in dp_drm_connector_init()
363 	if (!dp_display->is_edp)  in dp_drm_connector_init()
367 		connector->ycbcr_420_allowed = true;  in dp_drm_connector_init()