cdv_intel_hdmi.c

  1/*
  2 * Copyright © 2006-2011 Intel Corporation
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice (including the next
 12 * paragraph) shall be included in all copies or substantial portions of the
 13 * Software.
 14 *
 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 21 * DEALINGS IN THE SOFTWARE.
 22 *
 23 * Authors:
 24 *	jim liu <jim.liu@intel.com>
 25 */
 26
 27#include <linux/pm_runtime.h>
 28
 29#include <drm/drm.h>
 30#include <drm/drm_crtc.h>
 31#include <drm/drm_crtc_helper.h>
 32#include <drm/drm_edid.h>
 33#include <drm/drm_modeset_helper_vtables.h>
 34#include <drm/drm_print.h>
 35#include <drm/drm_simple_kms_helper.h>
 36
 37#include "cdv_device.h"
 38#include "psb_drv.h"
 39#include "psb_intel_drv.h"
 40#include "psb_intel_reg.h"
 41
 42/* hdmi control bits */
 43#define HDMI_NULL_PACKETS_DURING_VSYNC	(1 << 9)
 44#define HDMI_BORDER_ENABLE		(1 << 7)
 45#define HDMI_AUDIO_ENABLE		(1 << 6)
 46#define HDMI_VSYNC_ACTIVE_HIGH		(1 << 4)
 47#define HDMI_HSYNC_ACTIVE_HIGH		(1 << 3)
 48/* hdmi-b control bits */
 49#define	HDMIB_PIPE_B_SELECT		(1 << 30)
 50
 51
 52struct mid_intel_hdmi_priv {
 53	u32 hdmi_reg;
 54	u32 save_HDMIB;
 55	bool has_hdmi_sink;
 56	bool has_hdmi_audio;
 57	/* Should set this when detect hotplug */
 58	bool hdmi_device_connected;
 59	struct drm_device *dev;
 60};
 61
 62static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
 63			struct drm_display_mode *mode,
 64			struct drm_display_mode *adjusted_mode)
 65{
 66	struct drm_device *dev = encoder->dev;
 67	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
 68	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 69	u32 hdmib;
 70	struct drm_crtc *crtc = encoder->crtc;
 71	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 72
 73	hdmib = (2 << 10);
 74
 75	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 76		hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
 77	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 78		hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
 79
 80	if (gma_crtc->pipe == 1)
 81		hdmib |= HDMIB_PIPE_B_SELECT;
 82
 83	if (hdmi_priv->has_hdmi_audio) {
 84		hdmib |= HDMI_AUDIO_ENABLE;
 85		hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
 86	}
 87
 88	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
 89	REG_READ(hdmi_priv->hdmi_reg);
 90}
 91
 92static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
 93{
 94	struct drm_device *dev = encoder->dev;
 95	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
 96	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 97	u32 hdmib;
 98
 99	hdmib = REG_READ(hdmi_priv->hdmi_reg);
100
101	if (mode != DRM_MODE_DPMS_ON)
102		REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
103	else
104		REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
105	REG_READ(hdmi_priv->hdmi_reg);
106}
107
108static void cdv_hdmi_save(struct drm_connector *connector)
109{
110	struct drm_device *dev = connector->dev;
111	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
112	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
113
114	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
115}
116
117static void cdv_hdmi_restore(struct drm_connector *connector)
118{
119	struct drm_device *dev = connector->dev;
120	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
121	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
122
123	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
124	REG_READ(hdmi_priv->hdmi_reg);
125}
126
127static enum drm_connector_status cdv_hdmi_detect(
128				struct drm_connector *connector, bool force)
129{
130	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
131	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
132	struct edid *edid = NULL;
133	enum drm_connector_status status = connector_status_disconnected;
134
135	edid = drm_get_edid(connector, connector->ddc);
136
137	hdmi_priv->has_hdmi_sink = false;
138	hdmi_priv->has_hdmi_audio = false;
139	if (edid) {
140		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
141			status = connector_status_connected;
142			hdmi_priv->has_hdmi_sink =
143						drm_detect_hdmi_monitor(edid);
144			hdmi_priv->has_hdmi_audio =
145						drm_detect_monitor_audio(edid);
146		}
147		kfree(edid);
148	}
149	return status;
150}
151
152static int cdv_hdmi_set_property(struct drm_connector *connector,
153				       struct drm_property *property,
154				       uint64_t value)
155{
156	struct drm_encoder *encoder = connector->encoder;
157
158	if (!strcmp(property->name, "scaling mode") && encoder) {
159		struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
160		bool centre;
161		uint64_t curValue;
162
163		if (!crtc)
164			return -1;
165
166		switch (value) {
167		case DRM_MODE_SCALE_FULLSCREEN:
168			break;
169		case DRM_MODE_SCALE_NO_SCALE:
170			break;
171		case DRM_MODE_SCALE_ASPECT:
172			break;
173		default:
174			return -1;
175		}
176
177		if (drm_object_property_get_value(&connector->base,
178							property, &curValue))
179			return -1;
180
181		if (curValue == value)
182			return 0;
183
184		if (drm_object_property_set_value(&connector->base,
185							property, value))
186			return -1;
187
188		centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
189			(value == DRM_MODE_SCALE_NO_SCALE);
190
191		if (crtc->saved_mode.hdisplay != 0 &&
192		    crtc->saved_mode.vdisplay != 0) {
193			if (centre) {
194				if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
195					    encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
196					return -1;
197			} else {
198				const struct drm_encoder_helper_funcs *helpers
199						    = encoder->helper_private;
200				helpers->mode_set(encoder, &crtc->saved_mode,
201					     &crtc->saved_adjusted_mode);
202			}
203		}
204	}
205	return 0;
206}
207
208/*
209 * Return the list of HDMI DDC modes if available.
210 */
211static int cdv_hdmi_get_modes(struct drm_connector *connector)
212{
213	struct edid *edid = NULL;
214	int ret = 0;
215
216	edid = drm_get_edid(connector, connector->ddc);
217	if (edid) {
218		drm_connector_update_edid_property(connector, edid);
219		ret = drm_add_edid_modes(connector, edid);
220		kfree(edid);
221	}
222	return ret;
223}
224
225static enum drm_mode_status cdv_hdmi_mode_valid(struct drm_connector *connector,
226				 const struct drm_display_mode *mode)
227{
228	if (mode->clock > 165000)
229		return MODE_CLOCK_HIGH;
230	if (mode->clock < 20000)
231		return MODE_CLOCK_HIGH;
232
233	/* just in case */
234	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
235		return MODE_NO_DBLESCAN;
236
237	/* just in case */
238	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
239		return MODE_NO_INTERLACE;
240
241	return MODE_OK;
242}
243
244static void cdv_hdmi_destroy(struct drm_connector *connector)
245{
246	struct gma_connector *gma_connector = to_gma_connector(connector);
247	struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
248
249	gma_i2c_destroy(ddc_bus);
250	drm_connector_cleanup(connector);
251	kfree(gma_connector);
252}
253
254static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
255	.dpms = cdv_hdmi_dpms,
256	.prepare = gma_encoder_prepare,
257	.mode_set = cdv_hdmi_mode_set,
258	.commit = gma_encoder_commit,
259};
260
261static const struct drm_connector_helper_funcs
262					cdv_hdmi_connector_helper_funcs = {
263	.get_modes = cdv_hdmi_get_modes,
264	.mode_valid = cdv_hdmi_mode_valid,
265	.best_encoder = gma_best_encoder,
266};
267
268static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
269	.dpms = drm_helper_connector_dpms,
270	.detect = cdv_hdmi_detect,
271	.fill_modes = drm_helper_probe_single_connector_modes,
272	.set_property = cdv_hdmi_set_property,
273	.destroy = cdv_hdmi_destroy,
274};
275
276void cdv_hdmi_init(struct drm_device *dev,
277			struct psb_intel_mode_device *mode_dev, int reg)
278{
279	struct gma_encoder *gma_encoder;
280	struct gma_connector *gma_connector;
281	struct drm_connector *connector;
282	struct mid_intel_hdmi_priv *hdmi_priv;
283	struct gma_i2c_chan *ddc_bus;
284	int ddc_reg;
285	int ret;
286
287	gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
288	if (!gma_encoder)
289		return;
290
291	gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
292	if (!gma_connector)
293		goto err_free_encoder;
294
295	hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
296	if (!hdmi_priv)
297		goto err_free_connector;
298
299	connector = &gma_connector->base;
300	connector->polled = DRM_CONNECTOR_POLL_HPD;
301	gma_connector->save = cdv_hdmi_save;
302	gma_connector->restore = cdv_hdmi_restore;
303
304	switch (reg) {
305	case SDVOB:
306		ddc_reg = GPIOE;
307		gma_encoder->ddi_select = DDI0_SELECT;
308		break;
309	case SDVOC:
310		ddc_reg = GPIOD;
311		gma_encoder->ddi_select = DDI1_SELECT;
312		break;
313	default:
314		DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
315		goto err_free_hdmi_priv;
316	}
317
318	ddc_bus = gma_i2c_create(dev, ddc_reg,
319				 (reg == SDVOB) ? "HDMIB" : "HDMIC");
320	if (!ddc_bus) {
321		dev_err(dev->dev, "No ddc adapter available!\n");
322		goto err_free_hdmi_priv;
323	}
324
325	ret = drm_connector_init_with_ddc(dev, connector,
326					  &cdv_hdmi_connector_funcs,
327					  DRM_MODE_CONNECTOR_DVID,
328					  &ddc_bus->base);
329	if (ret)
330		goto err_ddc_destroy;
331
332	ret = drm_simple_encoder_init(dev, &gma_encoder->base,
333				      DRM_MODE_ENCODER_TMDS);
334	if (ret)
335		goto err_connector_cleanup;
336
337	gma_connector_attach_encoder(gma_connector, gma_encoder);
338	gma_encoder->type = INTEL_OUTPUT_HDMI;
339	hdmi_priv->hdmi_reg = reg;
340	hdmi_priv->has_hdmi_sink = false;
341	gma_encoder->dev_priv = hdmi_priv;
342
343	drm_encoder_helper_add(&gma_encoder->base, &cdv_hdmi_helper_funcs);
344	drm_connector_helper_add(connector,
345				 &cdv_hdmi_connector_helper_funcs);
346	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
347	connector->interlace_allowed = false;
348	connector->doublescan_allowed = false;
349
350	drm_object_attach_property(&connector->base,
351				      dev->mode_config.scaling_mode_property,
352				      DRM_MODE_SCALE_FULLSCREEN);
353
354	hdmi_priv->dev = dev;
355	return;
356
357err_connector_cleanup:
358	drm_connector_cleanup(connector);
359err_ddc_destroy:
360	gma_i2c_destroy(ddc_bus);
361err_free_hdmi_priv:
362	kfree(hdmi_priv);
363err_free_connector:
364	kfree(gma_connector);
365err_free_encoder:
366	kfree(gma_encoder);
367}