[linux-2.6-block.git] / drivers / gpu / drm / i915 / intel_hdmi.c

/*
 * Copyright 2006 Dave Airlie <airlied@linux.ie>
 * Copyright © 2006-2009 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *	Eric Anholt <eric@anholt.net>
 *	Jesse Barnes <jesse.barnes@intel.com>
 */

#include <linux/i2c.h>
#include <linux/delay.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"

struct intel_hdmi_priv {
	u32 sdvox_reg;
	u32 save_SDVOX;
	bool has_hdmi_sink;
};

static void intel_hdmi_mode_set(struct drm_encoder *encoder,
				struct drm_display_mode *mode,
				struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_crtc *crtc = encoder->crtc;
	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	struct intel_output *intel_output = enc_to_intel_output(encoder);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	u32 sdvox;

	sdvox = SDVO_ENCODING_HDMI |
		SDVO_BORDER_ENABLE |
		SDVO_VSYNC_ACTIVE_HIGH |
		SDVO_HSYNC_ACTIVE_HIGH;

	if (hdmi_priv->has_hdmi_sink)
		sdvox |= SDVO_AUDIO_ENABLE;

	if (intel_crtc->pipe == 1)
		sdvox |= SDVO_PIPE_B_SELECT;

	I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
	POSTING_READ(hdmi_priv->sdvox_reg);
}

static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = enc_to_intel_output(encoder);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	u32 temp;

	if (mode != DRM_MODE_DPMS_ON) {
		temp = I915_READ(hdmi_priv->sdvox_reg);
		I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
	} else {
		temp = I915_READ(hdmi_priv->sdvox_reg);
		I915_WRITE(hdmi_priv->sdvox_reg, temp | SDVO_ENABLE);
	}
	POSTING_READ(hdmi_priv->sdvox_reg);
}

static void intel_hdmi_save(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;

	hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
}

static void intel_hdmi_restore(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;

	I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
	POSTING_READ(hdmi_priv->sdvox_reg);
}

static int intel_hdmi_mode_valid(struct drm_connector *connector,
				 struct drm_display_mode *mode)
{
	if (mode->clock > 165000)
		return MODE_CLOCK_HIGH;
	if (mode->clock < 20000)
		return MODE_CLOCK_HIGH;

	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return MODE_NO_DBLESCAN;

	return MODE_OK;
}

static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
				  struct drm_display_mode *mode,
				  struct drm_display_mode *adjusted_mode)
{
	return true;
}

static void
intel_hdmi_sink_detect(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	struct edid *edid = NULL;

	edid = drm_get_edid(&intel_output->base,
			    &intel_output->ddc_bus->adapter);
	if (edid != NULL) {
		hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
		kfree(edid);
		intel_output->base.display_info.raw_edid = NULL;
	}
}

static enum drm_connector_status
intel_hdmi_detect(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	u32 temp, bit;

	temp = I915_READ(PORT_HOTPLUG_EN);

	switch (hdmi_priv->sdvox_reg) {
	case SDVOB:
		temp |= HDMIB_HOTPLUG_INT_EN;
		break;
	case SDVOC:
		temp |= HDMIC_HOTPLUG_INT_EN;
		break;
	default:
		return connector_status_unknown;
	}

	I915_WRITE(PORT_HOTPLUG_EN, temp);

	POSTING_READ(PORT_HOTPLUG_EN);

	switch (hdmi_priv->sdvox_reg) {
	case SDVOB:
		bit = HDMIB_HOTPLUG_INT_STATUS;
		break;
	case SDVOC:
		bit = HDMIC_HOTPLUG_INT_STATUS;
		break;
	default:
		return connector_status_unknown;
	}

	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) {
		intel_hdmi_sink_detect(connector);
		return connector_status_connected;
	} else
		return connector_status_disconnected;
}

static int intel_hdmi_get_modes(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);

	/* We should parse the EDID data and find out if it's an HDMI sink so
	 * we can send audio to it.
	 */

	return intel_ddc_get_modes(intel_output);
}

static void intel_hdmi_destroy(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);

	if (intel_output->i2c_bus)
		intel_i2c_destroy(intel_output->i2c_bus);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(intel_output);
}

static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
	.dpms = intel_hdmi_dpms,
	.mode_fixup = intel_hdmi_mode_fixup,
	.prepare = intel_encoder_prepare,
	.mode_set = intel_hdmi_mode_set,
	.commit = intel_encoder_commit,
};

static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
	.save = intel_hdmi_save,
	.restore = intel_hdmi_restore,
	.detect = intel_hdmi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = intel_hdmi_destroy,
};

static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
	.get_modes = intel_hdmi_get_modes,
	.mode_valid = intel_hdmi_mode_valid,
	.best_encoder = intel_best_encoder,
};

static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}

static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
	.destroy = intel_hdmi_enc_destroy,
};


void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_connector *connector;
	struct intel_output *intel_output;
	struct intel_hdmi_priv *hdmi_priv;

	intel_output = kcalloc(sizeof(struct intel_output) +
			       sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
	if (!intel_output)
		return;
	hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);

	connector = &intel_output->base;
	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
			   DRM_MODE_CONNECTOR_DVID);
	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);

	intel_output->type = INTEL_OUTPUT_HDMI;

	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;

	/* Set up the DDC bus. */
	if (sdvox_reg == SDVOB)
		intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
	else
		intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");

	if (!intel_output->ddc_bus)
		goto err_connector;

	hdmi_priv->sdvox_reg = sdvox_reg;
	intel_output->dev_priv = hdmi_priv;

	drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
			 DRM_MODE_ENCODER_TMDS);
	drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);

	drm_mode_connector_attach_encoder(&intel_output->base,
					  &intel_output->enc);
	drm_sysfs_connector_add(connector);

	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
	 * 0xd.  Failure to do so will result in spurious interrupts being
	 * generated on the port when a cable is not attached.
	 */
	if (IS_G4X(dev) && !IS_GM45(dev)) {
		u32 temp = I915_READ(PEG_BAND_GAP_DATA);
		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
	}

	return;

err_connector:
	drm_connector_cleanup(connector);
	kfree(intel_output);

	return;
}
Commit	Line	Data
7d57382e EA	1	/*
	2	* Copyright 2006 Dave Airlie <airlied@linux.ie>
	3	* Copyright © 2006-2009 Intel Corporation
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a
	6	* copy of this software and associated documentation files (the "Software"),
	7	* to deal in the Software without restriction, including without limitation
	8	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	9	* and/or sell copies of the Software, and to permit persons to whom the
	10	* Software is furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice (including the next
	13	* paragraph) shall be included in all copies or substantial portions of the
	14	* Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	22	* DEALINGS IN THE SOFTWARE.
	23	*
	24	* Authors:
	25	* Eric Anholt <eric@anholt.net>
	26	* Jesse Barnes <jesse.barnes@intel.com>
	27	*/
	28
	29	#include <linux/i2c.h>
	30	#include <linux/delay.h>
	31	#include "drmP.h"
	32	#include "drm.h"
	33	#include "drm_crtc.h"
	34	#include "intel_drv.h"
	35	#include "i915_drm.h"
	36	#include "i915_drv.h"
	37
	38	struct intel_hdmi_priv {
	39	u32 sdvox_reg;
	40	u32 save_SDVOX;
9dff6af8	41	bool has_hdmi_sink;
7d57382e EA	42	};
	43
	44	static void intel_hdmi_mode_set(struct drm_encoder *encoder,
	45	struct drm_display_mode *mode,
	46	struct drm_display_mode *adjusted_mode)
	47	{
	48	struct drm_device *dev = encoder->dev;
	49	struct drm_i915_private *dev_priv = dev->dev_private;
	50	struct drm_crtc *crtc = encoder->crtc;
	51	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	52	struct intel_output *intel_output = enc_to_intel_output(encoder);
	53	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	54	u32 sdvox;
	55
	56	sdvox = SDVO_ENCODING_HDMI \|
	57	SDVO_BORDER_ENABLE \|
	58	SDVO_VSYNC_ACTIVE_HIGH \|
	59	SDVO_HSYNC_ACTIVE_HIGH;
	60
	61	if (hdmi_priv->has_hdmi_sink)
	62	sdvox \|= SDVO_AUDIO_ENABLE;
	63
	64	if (intel_crtc->pipe == 1)
	65	sdvox \|= SDVO_PIPE_B_SELECT;
	66
	67	I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
	68	POSTING_READ(hdmi_priv->sdvox_reg);
	69	}
	70
	71	static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
	72	{
	73	struct drm_device *dev = encoder->dev;
	74	struct drm_i915_private *dev_priv = dev->dev_private;
	75	struct intel_output *intel_output = enc_to_intel_output(encoder);
	76	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	77	u32 temp;
	78
	79	if (mode != DRM_MODE_DPMS_ON) {
	80	temp = I915_READ(hdmi_priv->sdvox_reg);
	81	I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
	82	} else {
	83	temp = I915_READ(hdmi_priv->sdvox_reg);
	84	I915_WRITE(hdmi_priv->sdvox_reg, temp \| SDVO_ENABLE);
	85	}
	86	POSTING_READ(hdmi_priv->sdvox_reg);
	87	}
	88
	89	static void intel_hdmi_save(struct drm_connector *connector)
	90	{
	91	struct drm_device *dev = connector->dev;
	92	struct drm_i915_private *dev_priv = dev->dev_private;
	93	struct intel_output *intel_output = to_intel_output(connector);
	94	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	95
	96	hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
	97	}
	98
	99	static void intel_hdmi_restore(struct drm_connector *connector)
	100	{
	101	struct drm_device *dev = connector->dev;
	102	struct drm_i915_private *dev_priv = dev->dev_private;
	103	struct intel_output *intel_output = to_intel_output(connector);
	104	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	105
106	I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
107	POSTING_READ(hdmi_priv->sdvox_reg);
108	}
109
110	static int intel_hdmi_mode_valid(struct drm_connector *connector,
111	struct drm_display_mode *mode)
112	{
113	if (mode->clock > 165000)
114	return MODE_CLOCK_HIGH;
115	if (mode->clock < 20000)
116	return MODE_CLOCK_HIGH;
117
118	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
119	return MODE_NO_DBLESCAN;
120
121	return MODE_OK;
122	}
123
124	static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
125	struct drm_display_mode *mode,
126	struct drm_display_mode *adjusted_mode)
127	{
128	return true;
129	}
130
9dff6af8 ML	131	static void
	132	intel_hdmi_sink_detect(struct drm_connector *connector)
	133	{
	134	struct intel_output *intel_output = to_intel_output(connector);
	135	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	136	struct edid *edid = NULL;
	137
	138	edid = drm_get_edid(&intel_output->base,
	139	&intel_output->ddc_bus->adapter);
	140	if (edid != NULL) {
	141	hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
	142	kfree(edid);
	143	intel_output->base.display_info.raw_edid = NULL;
	144	}
	145	}
	146
7d57382e EA	147	static enum drm_connector_status
	148	intel_hdmi_detect(struct drm_connector *connector)
	149	{
	150	struct drm_device *dev = connector->dev;
	151	struct drm_i915_private *dev_priv = dev->dev_private;
	152	struct intel_output *intel_output = to_intel_output(connector);
	153	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	154	u32 temp, bit;
	155
	156	temp = I915_READ(PORT_HOTPLUG_EN);
	157
9d2949a4 ML	158	switch (hdmi_priv->sdvox_reg) {
	159	case SDVOB:
	160	temp \|= HDMIB_HOTPLUG_INT_EN;
	161	break;
	162	case SDVOC:
	163	temp \|= HDMIC_HOTPLUG_INT_EN;
	164	break;
	165	default:
	166	return connector_status_unknown;
	167	}
	168
	169	I915_WRITE(PORT_HOTPLUG_EN, temp);
7d57382e EA	170
	171	POSTING_READ(PORT_HOTPLUG_EN);
	172
	173	switch (hdmi_priv->sdvox_reg) {
	174	case SDVOB:
	175	bit = HDMIB_HOTPLUG_INT_STATUS;
	176	break;
	177	case SDVOC:
	178	bit = HDMIC_HOTPLUG_INT_STATUS;
	179	break;
	180	default:
	181	return connector_status_unknown;
	182	}
	183
9dff6af8 ML	184	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) {
9dff6af8 ML	185	intel_hdmi_sink_detect(connector);
7d57382e	186	return connector_status_connected;
9dff6af8	187	} else
7d57382e EA	188	return connector_status_disconnected;
	189	}
	190
	191	static int intel_hdmi_get_modes(struct drm_connector *connector)
	192	{
	193	struct intel_output *intel_output = to_intel_output(connector);
	194
	195	/* We should parse the EDID data and find out if it's an HDMI sink so
	196	* we can send audio to it.
	197	*/
	198
	199	return intel_ddc_get_modes(intel_output);
	200	}
	201
	202	static void intel_hdmi_destroy(struct drm_connector *connector)
	203	{
	204	struct intel_output *intel_output = to_intel_output(connector);
	205
	206	if (intel_output->i2c_bus)
	207	intel_i2c_destroy(intel_output->i2c_bus);
	208	drm_sysfs_connector_remove(connector);
	209	drm_connector_cleanup(connector);
	210	kfree(intel_output);
	211	}
	212
	213	static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
	214	.dpms = intel_hdmi_dpms,
	215	.mode_fixup = intel_hdmi_mode_fixup,
	216	.prepare = intel_encoder_prepare,
	217	.mode_set = intel_hdmi_mode_set,
	218	.commit = intel_encoder_commit,
	219	};
	220
	221	static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
	222	.save = intel_hdmi_save,
	223	.restore = intel_hdmi_restore,
	224	.detect = intel_hdmi_detect,
	225	.fill_modes = drm_helper_probe_single_connector_modes,
	226	.destroy = intel_hdmi_destroy,
	227	};
	228
	229	static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
	230	.get_modes = intel_hdmi_get_modes,
	231	.mode_valid = intel_hdmi_mode_valid,
	232	.best_encoder = intel_best_encoder,
	233	};
	234
	235	static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
	236	{
	237	drm_encoder_cleanup(encoder);
	238	}
	239
	240	static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
	241	.destroy = intel_hdmi_enc_destroy,
	242	};
	243
	244
	245	void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
	246	{
	247	struct drm_i915_private *dev_priv = dev->dev_private;
	248	struct drm_connector *connector;
	249	struct intel_output *intel_output;
	250	struct intel_hdmi_priv *hdmi_priv;
	251
252	intel_output = kcalloc(sizeof(struct intel_output) +
253	sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
254	if (!intel_output)
255	return;
256	hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
257
258	connector = &intel_output->base;
259	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
260	DRM_MODE_CONNECTOR_DVID);
261	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
262
263	intel_output->type = INTEL_OUTPUT_HDMI;
264
265	connector->interlace_allowed = 0;
266	connector->doublescan_allowed = 0;
267
268	/* Set up the DDC bus. */
269	if (sdvox_reg == SDVOB)
270	intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
271	else
272	intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
273
274	if (!intel_output->ddc_bus)
275	goto err_connector;
276
277	hdmi_priv->sdvox_reg = sdvox_reg;
278	intel_output->dev_priv = hdmi_priv;
279
280	drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
281	DRM_MODE_ENCODER_TMDS);
282	drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
283
284	drm_mode_connector_attach_encoder(&intel_output->base,
285	&intel_output->enc);
286	drm_sysfs_connector_add(connector);
287
288	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
289	* 0xd. Failure to do so will result in spurious interrupts being
290	* generated on the port when a cable is not attached.
291	*/
292	if (IS_G4X(dev) && !IS_GM45(dev)) {
293	u32 temp = I915_READ(PEG_BAND_GAP_DATA);
294	I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) \| 0xd);
295	}
296
297	return;
298
299	err_connector:
300	drm_connector_cleanup(connector);
301	kfree(intel_output);
302
303	return;
304	}