intel_connector.c

  1/*
  2 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
  3 * Copyright (c) 2007, 2010 Intel Corporation
  4 *   Jesse Barnes <jesse.barnes@intel.com>
  5 *
  6 * Permission is hereby granted, free of charge, to any person obtaining a
  7 * copy of this software and associated documentation files (the "Software"),
  8 * to deal in the Software without restriction, including without limitation
  9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 10 * and/or sell copies of the Software, and to permit persons to whom the
 11 * Software is furnished to do so, subject to the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the next
 14 * paragraph) shall be included in all copies or substantial portions of the
 15 * Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 23 * DEALINGS IN THE SOFTWARE.
 24 */
 25
 26#include <linux/i2c.h>
 27#include <linux/slab.h>
 28
 29#include <drm/drm_atomic_helper.h>
 30#include <drm/drm_edid.h>
 31#include <drm/drm_print.h>
 32#include <drm/drm_probe_helper.h>
 33
 34#include "i915_drv.h"
 35#include "i915_utils.h" /* for i915_inject_probe_failure() */
 36#include "intel_connector.h"
 37#include "intel_display_core.h"
 38#include "intel_display_debugfs.h"
 39#include "intel_display_types.h"
 40#include "intel_hdcp.h"
 41#include "intel_panel.h"
 42
 43static void intel_connector_modeset_retry_work_fn(struct work_struct *work)
 44{
 45	struct intel_connector *connector = container_of(work, typeof(*connector),
 46							 modeset_retry_work);
 47	struct intel_display *display = to_intel_display(connector);
 48
 49	drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n", connector->base.base.id,
 50		    connector->base.name);
 51
 52	/* Grab the locks before changing connector property*/
 53	mutex_lock(&display->drm->mode_config.mutex);
 54	/* Set connector link status to BAD and send a Uevent to notify
 55	 * userspace to do a modeset.
 56	 */
 57	drm_connector_set_link_status_property(&connector->base,
 58					       DRM_MODE_LINK_STATUS_BAD);
 59	mutex_unlock(&display->drm->mode_config.mutex);
 60	/* Send Hotplug uevent so userspace can reprobe */
 61	drm_kms_helper_connector_hotplug_event(&connector->base);
 62
 63	drm_connector_put(&connector->base);
 64}
 65
 66void intel_connector_queue_modeset_retry_work(struct intel_connector *connector)
 67{
 68	struct intel_display *display = to_intel_display(connector);
 69
 70	drm_connector_get(&connector->base);
 71	if (!queue_work(display->wq.unordered, &connector->modeset_retry_work))
 72		drm_connector_put(&connector->base);
 73}
 74
 75void intel_connector_cancel_modeset_retry_work(struct intel_connector *connector)
 76{
 77	if (cancel_work_sync(&connector->modeset_retry_work))
 78		drm_connector_put(&connector->base);
 79}
 80
 81static int intel_connector_init(struct intel_connector *connector)
 82{
 83	struct intel_digital_connector_state *conn_state;
 84
 85	/*
 86	 * Allocate enough memory to hold intel_digital_connector_state,
 87	 * This might be a few bytes too many, but for connectors that don't
 88	 * need it we'll free the state and allocate a smaller one on the first
 89	 * successful commit anyway.
 90	 */
 91	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
 92	if (!conn_state)
 93		return -ENOMEM;
 94
 95	__drm_atomic_helper_connector_reset(&connector->base,
 96					    &conn_state->base);
 97
 98	intel_panel_init_alloc(connector);
 99
100	INIT_WORK(&connector->modeset_retry_work,
101		  intel_connector_modeset_retry_work_fn);
102
103	return 0;
104}
105
106struct intel_connector *intel_connector_alloc(void)
107{
108	struct intel_connector *connector;
109
110	connector = kzalloc(sizeof(*connector), GFP_KERNEL);
111	if (!connector)
112		return NULL;
113
114	if (intel_connector_init(connector) < 0) {
115		kfree(connector);
116		return NULL;
117	}
118
119	return connector;
120}
121
122/*
123 * Free the bits allocated by intel_connector_alloc.
124 * This should only be used after intel_connector_alloc has returned
125 * successfully, and before drm_connector_init returns successfully.
126 * Otherwise the destroy callbacks for the connector and the state should
127 * take care of proper cleanup/free (see intel_connector_destroy).
128 */
129void intel_connector_free(struct intel_connector *connector)
130{
131	kfree(to_intel_digital_connector_state(connector->base.state));
132	kfree(connector);
133}
134
135/*
136 * Connector type independent destroy hook for drm_connector_funcs.
137 */
138void intel_connector_destroy(struct drm_connector *connector)
139{
140	struct intel_connector *intel_connector = to_intel_connector(connector);
141
142	drm_edid_free(intel_connector->detect_edid);
143
144	intel_hdcp_cleanup(intel_connector);
145
146	intel_panel_fini(intel_connector);
147
148	drm_connector_cleanup(connector);
149
150	if (intel_connector->mst.port)
151		drm_dp_mst_put_port_malloc(intel_connector->mst.port);
152
153	kfree(connector);
154}
155
156int intel_connector_register(struct drm_connector *_connector)
157{
158	struct intel_connector *connector = to_intel_connector(_connector);
159	struct drm_i915_private *i915 = to_i915(_connector->dev);
160	int ret;
161
162	ret = intel_panel_register(connector);
163	if (ret)
164		goto err;
165
166	if (i915_inject_probe_failure(i915)) {
167		ret = -EFAULT;
168		goto err_panel;
169	}
170
171	intel_connector_debugfs_add(connector);
172
173	return 0;
174
175err_panel:
176	intel_panel_unregister(connector);
177err:
178	return ret;
179}
180
181void intel_connector_unregister(struct drm_connector *_connector)
182{
183	struct intel_connector *connector = to_intel_connector(_connector);
184
185	intel_panel_unregister(connector);
186}
187
188void intel_connector_attach_encoder(struct intel_connector *connector,
189				    struct intel_encoder *encoder)
190{
191	connector->encoder = encoder;
192	drm_connector_attach_encoder(&connector->base, &encoder->base);
193}
194
195/*
196 * Simple connector->get_hw_state implementation for encoders that support only
197 * one connector and no cloning and hence the encoder state determines the state
198 * of the connector.
199 */
200bool intel_connector_get_hw_state(struct intel_connector *connector)
201{
202	enum pipe pipe = 0;
203	struct intel_encoder *encoder = intel_attached_encoder(connector);
204
205	return encoder->get_hw_state(encoder, &pipe);
206}
207
208enum pipe intel_connector_get_pipe(struct intel_connector *connector)
209{
210	struct intel_display *display = to_intel_display(connector);
211
212	drm_modeset_lock_assert_held(&display->drm->mode_config.connection_mutex);
213
214	if (!connector->base.state->crtc)
215		return INVALID_PIPE;
216
217	return to_intel_crtc(connector->base.state->crtc)->pipe;
218}
219
220/**
221 * intel_connector_update_modes - update connector from edid
222 * @connector: DRM connector device to use
223 * @drm_edid: previously read EDID information
224 */
225int intel_connector_update_modes(struct drm_connector *connector,
226				 const struct drm_edid *drm_edid)
227{
228	int ret;
229
230	drm_edid_connector_update(connector, drm_edid);
231	ret = drm_edid_connector_add_modes(connector);
232
233	return ret;
234}
235
236/**
237 * intel_ddc_get_modes - get modelist from monitor
238 * @connector: DRM connector device to use
239 * @ddc: DDC bus i2c adapter
240 *
241 * Fetch the EDID information from @connector using the DDC bus.
242 */
243int intel_ddc_get_modes(struct drm_connector *connector,
244			struct i2c_adapter *ddc)
245{
246	const struct drm_edid *drm_edid;
247	int ret;
248
249	drm_edid = drm_edid_read_ddc(connector, ddc);
250	if (!drm_edid)
251		return 0;
252
253	ret = intel_connector_update_modes(connector, drm_edid);
254	drm_edid_free(drm_edid);
255
256	return ret;
257}
258
259static const struct drm_prop_enum_list force_audio_names[] = {
260	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
261	{ HDMI_AUDIO_OFF, "off" },
262	{ HDMI_AUDIO_AUTO, "auto" },
263	{ HDMI_AUDIO_ON, "on" },
264};
265
266void
267intel_attach_force_audio_property(struct drm_connector *connector)
268{
269	struct intel_display *display = to_intel_display(connector->dev);
270	struct drm_property *prop;
271
272	prop = display->properties.force_audio;
273	if (prop == NULL) {
274		prop = drm_property_create_enum(display->drm, 0,
275						"audio",
276						force_audio_names,
277						ARRAY_SIZE(force_audio_names));
278		if (prop == NULL)
279			return;
280
281		display->properties.force_audio = prop;
282	}
283	drm_object_attach_property(&connector->base, prop, 0);
284}
285
286static const struct drm_prop_enum_list broadcast_rgb_names[] = {
287	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
288	{ INTEL_BROADCAST_RGB_FULL, "Full" },
289	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
290};
291
292void
293intel_attach_broadcast_rgb_property(struct drm_connector *connector)
294{
295	struct intel_display *display = to_intel_display(connector->dev);
296	struct drm_property *prop;
297
298	prop = display->properties.broadcast_rgb;
299	if (prop == NULL) {
300		prop = drm_property_create_enum(display->drm, DRM_MODE_PROP_ENUM,
301						"Broadcast RGB",
302						broadcast_rgb_names,
303						ARRAY_SIZE(broadcast_rgb_names));
304		if (prop == NULL)
305			return;
306
307		display->properties.broadcast_rgb = prop;
308	}
309
310	drm_object_attach_property(&connector->base, prop, 0);
311}
312
313void
314intel_attach_aspect_ratio_property(struct drm_connector *connector)
315{
316	if (!drm_mode_create_aspect_ratio_property(connector->dev))
317		drm_object_attach_property(&connector->base,
318			connector->dev->mode_config.aspect_ratio_property,
319			DRM_MODE_PICTURE_ASPECT_NONE);
320}
321
322void
323intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
324{
325	if (!drm_mode_create_hdmi_colorspace_property(connector, 0))
326		drm_connector_attach_colorspace_property(connector);
327}
328
329void
330intel_attach_dp_colorspace_property(struct drm_connector *connector)
331{
332	if (!drm_mode_create_dp_colorspace_property(connector, 0))
333		drm_connector_attach_colorspace_property(connector);
334}
335
336void
337intel_attach_scaling_mode_property(struct drm_connector *connector)
338{
339	struct intel_display *display = to_intel_display(connector->dev);
340	u32 scaling_modes;
341
342	scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
343		BIT(DRM_MODE_SCALE_FULLSCREEN);
344
345	/* On GMCH platforms borders are only possible on the LVDS port */
346	if (!HAS_GMCH(display) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
347		scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
348
349	drm_connector_attach_scaling_mode_property(connector, scaling_modes);
350
351	connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
352}