1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
18  * msm_dp_bridge_detect - callback to determine if connector is connected
26 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_detect()
28 	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",  in msm_dp_bridge_detect()
29 		str_true_false(dp->link_ready));  in msm_dp_bridge_detect()
31 	return (dp->link_ready) ? connector_status_connected :  in msm_dp_bridge_detect()
42 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_atomic_check()
44 	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",  in msm_dp_bridge_atomic_check()
45 		str_true_false(dp->link_ready));  in msm_dp_bridge_atomic_check()
51 	 * crtc->active is still true. Any attempt to set the mode or manually  in msm_dp_bridge_atomic_check()
58 	if (bridge->ops & DRM_BRIDGE_OP_HPD)  in msm_dp_bridge_atomic_check()
59 		return (dp->link_ready) ? 0 : -ENOTCONN;  in msm_dp_bridge_atomic_check()
66  * msm_dp_bridge_get_modes - callback to add drm modes via drm_mode_probed_add()
79 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_get_modes()
82 	if (dp->link_ready) {  in msm_dp_bridge_get_modes()
89 		drm_dbg_dp(connector->dev, "No sink connected\n");  in msm_dp_bridge_get_modes()
96 	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_dp_bridge_debugfs_init()
124 	struct msm_dp *dp = to_dp_bridge(drm_bridge)->msm_dp_display;  in msm_edp_bridge_atomic_check()
127 		return -ENODEV;  in msm_edp_bridge_atomic_check()
129 	conn_state->self_refresh_aware = dp->psr_supported;  in msm_edp_bridge_atomic_check()
131 	if (!conn_state->crtc || !crtc_state)  in msm_edp_bridge_atomic_check()
134 	if (crtc_state->self_refresh_active && !dp->psr_supported)  in msm_edp_bridge_atomic_check()
135 		return -EINVAL;  in msm_edp_bridge_atomic_check()
146 	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;  in msm_edp_bridge_atomic_enable()
149 	 * Check the old state of the crtc to determine if the panel  in msm_edp_bridge_atomic_enable()
151 	 * If the panel is in psr, just exit psr state and skip the full  in msm_edp_bridge_atomic_enable()
155 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_enable()
161 	if (old_crtc_state && old_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_enable()
175 	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;  in msm_edp_bridge_atomic_disable()
178 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_disable()
195 	 * The eDP controller will be disabled in the  in msm_edp_bridge_atomic_disable()
201 	if (new_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_disable()
204 	} else if (old_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_disable()
220 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_post_disable()
231 	if (new_crtc_state->self_refresh_active)  in msm_edp_bridge_atomic_post_disable()
238  * msm_edp_bridge_mode_valid - callback to determine if specified mode is valid
249 	int mode_pclk_khz = mode->clock;  in msm_edp_bridge_mode_valid()
251 	dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_edp_bridge_mode_valid()
253 	if (!dp || !mode_pclk_khz || !dp->connector) {  in msm_edp_bridge_mode_valid()
255 		return -EINVAL;  in msm_edp_bridge_mode_valid()
265 	 * The eDP controller currently does not have a reliable way of  in msm_edp_bridge_mode_valid()
266 	 * enabling panel power to read sink capabilities. So, we rely  in msm_edp_bridge_mode_valid()
267 	 * on the panel driver to populate only supported modes for now.  in msm_edp_bridge_mode_valid()
274 	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_edp_bridge_debugfs_init()
299 	msm_dp_bridge = devm_kzalloc(dev->dev, sizeof(*msm_dp_bridge), GFP_KERNEL);  in msm_dp_bridge_init()
301 		return -ENOMEM;  in msm_dp_bridge_init()
303 	msm_dp_bridge->msm_dp_display = msm_dp_display;  in msm_dp_bridge_init()
305 	bridge = &msm_dp_bridge->bridge;  in msm_dp_bridge_init()
306 	bridge->funcs = msm_dp_display->is_edp ? &msm_edp_bridge_ops : &msm_dp_bridge_ops;  in msm_dp_bridge_init()
307 	bridge->type = msm_dp_display->connector_type;  in msm_dp_bridge_init()
308 	bridge->ycbcr_420_allowed = yuv_supported;  in msm_dp_bridge_init()
312 	 * - Detect/HPD are used by DRM to know if a display is _physically_  in msm_dp_bridge_init()
314 	 *   On eDP we assume the display is always there because you can't  in msm_dp_bridge_init()
317 	 * - Currently eDP mode reading is driven by the panel driver. This  in msm_dp_bridge_init()
318 	 *   allows the panel driver to properly power itself on to read the  in msm_dp_bridge_init()
321 	if (!msm_dp_display->is_edp) {  in msm_dp_bridge_init()
322 		bridge->ops =  in msm_dp_bridge_init()
328 	rc = devm_drm_bridge_add(dev->dev, bridge);  in msm_dp_bridge_init()
342 	if (msm_dp_display->next_bridge) {  in msm_dp_bridge_init()
344 					msm_dp_display->next_bridge, bridge,  in msm_dp_bridge_init()
347 			DRM_ERROR("failed to attach panel bridge: %d\n", rc);  in msm_dp_bridge_init()
361 	connector = drm_bridge_connector_init(msm_dp_display->drm_dev, encoder);  in msm_dp_drm_connector_init()
365 	if (!msm_dp_display->is_edp)  in msm_dp_drm_connector_init()