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
24 	struct msm_dp *dp;  in msm_dp_bridge_detect()  local
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()
40 	struct msm_dp *dp;  in msm_dp_bridge_atomic_check()  local
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()
68  * @connector: Pointer to drm connector structure
71 static int msm_dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector)  in msm_dp_bridge_get_modes()  argument
74 	struct msm_dp *dp;  in msm_dp_bridge_get_modes()  local
76 	if (!connector)  in msm_dp_bridge_get_modes()
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()
83 		rc = msm_dp_display_get_modes(dp);  in msm_dp_bridge_get_modes()
85 			DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc);  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()  local
98 	msm_dp_display_debugfs_init(dp, root, false);  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()  local
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()  local
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()
162 		msm_dp_display_set_psr(dp, false);  in msm_edp_bridge_atomic_enable()
175 	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;  in msm_edp_bridge_atomic_disable()  local
178 						   drm_bridge->encoder);  in msm_edp_bridge_atomic_disable()
201 	if (new_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_disable()
202 		msm_dp_display_set_psr(dp, true);  in msm_edp_bridge_atomic_disable()
204 	} else if (old_crtc_state->self_refresh_active) {  in msm_edp_bridge_atomic_disable()
205 		msm_dp_display_set_psr(dp, false);  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
248 	struct msm_dp *dp;  in msm_edp_bridge_mode_valid()  local
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()
258 	if (msm_dp_wide_bus_available(dp))  in msm_edp_bridge_mode_valid()
274 	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;  in msm_edp_bridge_debugfs_init()  local
276 	msm_dp_display_debugfs_init(dp, root, true);  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()
311 	 * Many ops only make sense for DP. Why?  in msm_dp_bridge_init()
312 	 * - Detect/HPD are used by DRM to know if a display is _physically_  in msm_dp_bridge_init()
317 	 * - Currently eDP mode reading is driven by the panel driver. This  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()
355 /* connector initialization */
359 	struct drm_connector *connector = NULL;  in msm_dp_drm_connector_init()  local
361 	connector = drm_bridge_connector_init(msm_dp_display->drm_dev, encoder);  in msm_dp_drm_connector_init()
362 	if (IS_ERR(connector))  in msm_dp_drm_connector_init()
363 		return connector;  in msm_dp_drm_connector_init()
365 	if (!msm_dp_display->is_edp)  in msm_dp_drm_connector_init()
366 		drm_connector_attach_dp_subconnector_property(connector);  in msm_dp_drm_connector_init()
368 	drm_connector_attach_encoder(connector, encoder);  in msm_dp_drm_connector_init()
370 	return connector;  in msm_dp_drm_connector_init()