[deliverable/linux.git] / drivers / gpu / drm / radeon / r600_audio.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Christian König.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Christian König
 */
#include "drmP.h"
#include "radeon.h"
#include "radeon_reg.h"
#include "radeon_asic.h"
#include "atom.h"

#define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */

/*
 * check if the chipset is supported
 */
static int r600_audio_chipset_supported(struct radeon_device *rdev)
{
	return (rdev->family >= CHIP_R600 && rdev->family < CHIP_CEDAR)
		|| rdev->family == CHIP_RS600
		|| rdev->family == CHIP_RS690
		|| rdev->family == CHIP_RS740;
}

/*
 * current number of channels
 */
int r600_audio_channels(struct radeon_device *rdev)
{
	return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
}

/*
 * current bits per sample
 */
int r600_audio_bits_per_sample(struct radeon_device *rdev)
{
	uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
	switch (value) {
	case 0x0: return  8;
	case 0x1: return 16;
	case 0x2: return 20;
	case 0x3: return 24;
	case 0x4: return 32;
	}

	dev_err(rdev->dev, "Unknown bits per sample 0x%x using 16 instead\n",
		(int)value);

	return 16;
}

/*
 * current sampling rate in HZ
 */
int r600_audio_rate(struct radeon_device *rdev)
{
	uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
	uint32_t result;

	if (value & 0x4000)
		result = 44100;
	else
		result = 48000;

	result *= ((value >> 11) & 0x7) + 1;
	result /= ((value >> 8) & 0x7) + 1;

	return result;
}

/*
 * iec 60958 status bits
 */
uint8_t r600_audio_status_bits(struct radeon_device *rdev)
{
	return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
}

/*
 * iec 60958 category code
 */
uint8_t r600_audio_category_code(struct radeon_device *rdev)
{
	return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
}

/*
 * schedule next audio update event
 */
void r600_audio_schedule_polling(struct radeon_device *rdev)
{
	mod_timer(&rdev->audio_timer,
		jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
}

/*
 * update all hdmi interfaces with current audio parameters
 */
static void r600_audio_update_hdmi(unsigned long param)
{
	struct radeon_device *rdev = (struct radeon_device *)param;
	struct drm_device *dev = rdev->ddev;

	int channels = r600_audio_channels(rdev);
	int rate = r600_audio_rate(rdev);
	int bps = r600_audio_bits_per_sample(rdev);
	uint8_t status_bits = r600_audio_status_bits(rdev);
	uint8_t category_code = r600_audio_category_code(rdev);

	struct drm_encoder *encoder;
	int changes = 0, still_going = 0;

	changes |= channels != rdev->audio_channels;
	changes |= rate != rdev->audio_rate;
	changes |= bps != rdev->audio_bits_per_sample;
	changes |= status_bits != rdev->audio_status_bits;
	changes |= category_code != rdev->audio_category_code;

	if (changes) {
		rdev->audio_channels = channels;
		rdev->audio_rate = rate;
		rdev->audio_bits_per_sample = bps;
		rdev->audio_status_bits = status_bits;
		rdev->audio_category_code = category_code;
	}

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
		still_going |= radeon_encoder->audio_polling_active;
		if (changes || r600_hdmi_buffer_status_changed(encoder))
			r600_hdmi_update_audio_settings(encoder);
	}

	if (still_going)
		r600_audio_schedule_polling(rdev);
}

/*
 * turn on/off audio engine
 */
static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
{
	DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
	WREG32_P(R600_AUDIO_ENABLE, enable ? 0x81000000 : 0x0, ~0x81000000);
	rdev->audio_enabled = enable;
}

/*
 * initialize the audio vars and register the update timer
 */
int r600_audio_init(struct radeon_device *rdev)
{
	if (!radeon_audio || !r600_audio_chipset_supported(rdev))
		return 0;

	r600_audio_engine_enable(rdev, true);

	rdev->audio_channels = -1;
	rdev->audio_rate = -1;
	rdev->audio_bits_per_sample = -1;
	rdev->audio_status_bits = 0;
	rdev->audio_category_code = 0;

	setup_timer(
		&rdev->audio_timer,
		r600_audio_update_hdmi,
		(unsigned long)rdev);

	return 0;
}

/*
 * enable the polling timer, to check for status changes
 */
void r600_audio_enable_polling(struct drm_encoder *encoder)
{
	struct drm_device *dev = encoder->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

	DRM_DEBUG("r600_audio_enable_polling: %d\n",
		radeon_encoder->audio_polling_active);
	if (radeon_encoder->audio_polling_active)
		return;

	radeon_encoder->audio_polling_active = 1;
	if (rdev->audio_enabled)
		mod_timer(&rdev->audio_timer, jiffies + 1);
}

/*
 * disable the polling timer, so we get no more status updates
 */
void r600_audio_disable_polling(struct drm_encoder *encoder)
{
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	DRM_DEBUG("r600_audio_disable_polling: %d\n",
		radeon_encoder->audio_polling_active);
	radeon_encoder->audio_polling_active = 0;
}

/*
 * atach the audio codec to the clock source of the encoder
 */
void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
{
	struct drm_device *dev = encoder->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
	int base_rate = 48000;

	switch (radeon_encoder->encoder_id) {
	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
		WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
		break;
	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
		WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
		break;
	default:
		dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
			  radeon_encoder->encoder_id);
		return;
	}

	switch (dig->dig_encoder) {
	case 0:
		WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
		WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
		WREG32(R600_AUDIO_CLK_SRCSEL, 0);
		break;

	case 1:
		WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
		WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
		WREG32(R600_AUDIO_CLK_SRCSEL, 1);
		break;
	default:
		dev_err(rdev->dev, "Unsupported DIG on encoder 0x%02X\n",
			  radeon_encoder->encoder_id);
		return;
	}
}

/*
 * release the audio timer
 * TODO: How to do this correctly on SMP systems?
 */
void r600_audio_fini(struct radeon_device *rdev)
{
	if (!rdev->audio_enabled)
		return;

	del_timer(&rdev->audio_timer);

	r600_audio_engine_enable(rdev, false);
}
Commit	Line	Data
dafc3bd5 CK	1	/*
	2	* Copyright 2008 Advanced Micro Devices, Inc.
	3	* Copyright 2008 Red Hat Inc.
	4	* Copyright 2009 Christian König.
	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 shall be included in
	14	* all copies or substantial portions of the 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	20	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	21	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	22	* OTHER DEALINGS IN THE SOFTWARE.
	23	*
	24	* Authors: Christian König
	25	*/
	26	#include "drmP.h"
	27	#include "radeon.h"
	28	#include "radeon_reg.h"
3574dda4	29	#include "radeon_asic.h"
dafc3bd5 CK	30	#include "atom.h"
	31
	32	#define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */
	33
	34	/*
	35	* check if the chipset is supported
	36	*/
	37	static int r600_audio_chipset_supported(struct radeon_device *rdev)
	38	{
16823d16	39	return (rdev->family >= CHIP_R600 && rdev->family < CHIP_CEDAR)
dafc3bd5 CK	40	\|\| rdev->family == CHIP_RS600
	41	\|\| rdev->family == CHIP_RS690
	42	\|\| rdev->family == CHIP_RS740;
	43	}
	44
	45	/*
	46	* current number of channels
	47	*/
58bd0863	48	int r600_audio_channels(struct radeon_device *rdev)
dafc3bd5 CK	49	{
	50	return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
	51	}
	52
	53	/*
	54	* current bits per sample
	55	*/
58bd0863	56	int r600_audio_bits_per_sample(struct radeon_device *rdev)
dafc3bd5 CK	57	{
	58	uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
	59	switch (value) {
	60	case 0x0: return 8;
	61	case 0x1: return 16;
	62	case 0x2: return 20;
	63	case 0x3: return 24;
	64	case 0x4: return 32;
	65	}
	66
219de62a RM	67	dev_err(rdev->dev, "Unknown bits per sample 0x%x using 16 instead\n",
219de62a RM	68	(int)value);
dafc3bd5 CK	69
	70	return 16;
	71	}
	72
	73	/*
	74	* current sampling rate in HZ
	75	*/
58bd0863	76	int r600_audio_rate(struct radeon_device *rdev)
dafc3bd5 CK	77	{
	78	uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
	79	uint32_t result;
	80
	81	if (value & 0x4000)
	82	result = 44100;
	83	else
	84	result = 48000;
	85
	86	result *= ((value >> 11) & 0x7) + 1;
	87	result /= ((value >> 8) & 0x7) + 1;
	88
	89	return result;
	90	}
	91
	92	/*
	93	* iec 60958 status bits
	94	*/
58bd0863	95	uint8_t r600_audio_status_bits(struct radeon_device *rdev)
dafc3bd5 CK	96	{
	97	return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
	98	}
	99
	100	/*
	101	* iec 60958 category code
	102	*/
58bd0863	103	uint8_t r600_audio_category_code(struct radeon_device *rdev)
dafc3bd5 CK	104	{
	105	return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
	106	}
	107
f2594933 CK	108	/*
	109	* schedule next audio update event
	110	*/
	111	void r600_audio_schedule_polling(struct radeon_device *rdev)
	112	{
	113	mod_timer(&rdev->audio_timer,
	114	jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
	115	}
	116
dafc3bd5 CK	117	/*
	118	* update all hdmi interfaces with current audio parameters
	119	*/
	120	static void r600_audio_update_hdmi(unsigned long param)
	121	{
	122	struct radeon_device rdev = (struct radeon_device )param;
	123	struct drm_device *dev = rdev->ddev;
	124
	125	int channels = r600_audio_channels(rdev);
	126	int rate = r600_audio_rate(rdev);
	127	int bps = r600_audio_bits_per_sample(rdev);
	128	uint8_t status_bits = r600_audio_status_bits(rdev);
	129	uint8_t category_code = r600_audio_category_code(rdev);
	130
	131	struct drm_encoder *encoder;
58bd0863	132	int changes = 0, still_going = 0;
dafc3bd5 CK	133
	134	changes \|= channels != rdev->audio_channels;
	135	changes \|= rate != rdev->audio_rate;
	136	changes \|= bps != rdev->audio_bits_per_sample;
	137	changes \|= status_bits != rdev->audio_status_bits;
	138	changes \|= category_code != rdev->audio_category_code;
	139
	140	if (changes) {
	141	rdev->audio_channels = channels;
	142	rdev->audio_rate = rate;
	143	rdev->audio_bits_per_sample = bps;
	144	rdev->audio_status_bits = status_bits;
	145	rdev->audio_category_code = category_code;
	146	}
	147
	148	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
58bd0863	149	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
f2594933 CK	150	still_going \|= radeon_encoder->audio_polling_active;
	151	if (changes \|\| r600_hdmi_buffer_status_changed(encoder))
	152	r600_hdmi_update_audio_settings(encoder);
dafc3bd5 CK	153	}
dafc3bd5 CK	154
219de62a RM	155	if (still_going)
219de62a RM	156	r600_audio_schedule_polling(rdev);
dafc3bd5 CK	157	}
dafc3bd5 CK	158
5230aea6 RM	159	/*
	160	* turn on/off audio engine
	161	*/
	162	static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
	163	{
219de62a	164	DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
5230aea6	165	WREG32_P(R600_AUDIO_ENABLE, enable ? 0x81000000 : 0x0, ~0x81000000);
7eea7e9e	166	rdev->audio_enabled = enable;
5230aea6 RM	167	}
5230aea6 RM	168
dafc3bd5 CK	169	/*
	170	* initialize the audio vars and register the update timer
	171	*/
	172	int r600_audio_init(struct radeon_device *rdev)
	173	{
c8792d5e	174	if (!radeon_audio \|\| !r600_audio_chipset_supported(rdev))
dafc3bd5 CK	175	return 0;
dafc3bd5 CK	176
c8792d5e	177	r600_audio_engine_enable(rdev, true);
dafc3bd5 CK	178
	179	rdev->audio_channels = -1;
	180	rdev->audio_rate = -1;
	181	rdev->audio_bits_per_sample = -1;
	182	rdev->audio_status_bits = 0;
	183	rdev->audio_category_code = 0;
	184
	185	setup_timer(
	186	&rdev->audio_timer,
	187	r600_audio_update_hdmi,
	188	(unsigned long)rdev);
	189
58bd0863 CK	190	return 0;
	191	}
	192
	193	/*
	194	* enable the polling timer, to check for status changes
	195	*/
	196	void r600_audio_enable_polling(struct drm_encoder *encoder)
	197	{
	198	struct drm_device *dev = encoder->dev;
	199	struct radeon_device *rdev = dev->dev_private;
	200	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	201
219de62a RM	202	DRM_DEBUG("r600_audio_enable_polling: %d\n",
219de62a RM	203	radeon_encoder->audio_polling_active);
58bd0863 CK	204	if (radeon_encoder->audio_polling_active)
	205	return;
	206
	207	radeon_encoder->audio_polling_active = 1;
7eea7e9e RM	208	if (rdev->audio_enabled)
7eea7e9e RM	209	mod_timer(&rdev->audio_timer, jiffies + 1);
58bd0863	210	}
dafc3bd5	211
58bd0863 CK	212	/*
	213	* disable the polling timer, so we get no more status updates
	214	*/
	215	void r600_audio_disable_polling(struct drm_encoder *encoder)
	216	{
	217	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
219de62a RM	218	DRM_DEBUG("r600_audio_disable_polling: %d\n",
219de62a RM	219	radeon_encoder->audio_polling_active);
58bd0863	220	radeon_encoder->audio_polling_active = 0;
dafc3bd5 CK	221	}
dafc3bd5 CK	222
dafc3bd5 CK	223	/*
	224	* atach the audio codec to the clock source of the encoder
	225	*/
	226	void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
	227	{
	228	struct drm_device *dev = encoder->dev;
	229	struct radeon_device *rdev = dev->dev_private;
	230	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
2cd6218c	231	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
dafc3bd5 CK	232	int base_rate = 48000;
	233
	234	switch (radeon_encoder->encoder_id) {
	235	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
	236	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
	237	WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
	238	break;
dafc3bd5 CK	239	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
	240	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
	241	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
	242	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
	243	WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
	244	break;
dafc3bd5	245	default:
219de62a	246	dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
dafc3bd5 CK	247	radeon_encoder->encoder_id);
	248	return;
	249	}
	250
2cd6218c	251	switch (dig->dig_encoder) {
dafc3bd5	252	case 0:
3fe373d9 RM	253	WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
3fe373d9 RM	254	WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
dafc3bd5 CK	255	WREG32(R600_AUDIO_CLK_SRCSEL, 0);
	256	break;
	257
	258	case 1:
3fe373d9 RM	259	WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
3fe373d9 RM	260	WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
dafc3bd5 CK	261	WREG32(R600_AUDIO_CLK_SRCSEL, 1);
dafc3bd5 CK	262	break;
2cd6218c RM	263	default:
	264	dev_err(rdev->dev, "Unsupported DIG on encoder 0x%02X\n",
	265	radeon_encoder->encoder_id);
	266	return;
dafc3bd5 CK	267	}
	268	}
	269
	270	/*
	271	* release the audio timer
	272	* TODO: How to do this correctly on SMP systems?
	273	*/
	274	void r600_audio_fini(struct radeon_device *rdev)
	275	{
7eea7e9e	276	if (!rdev->audio_enabled)
dafc3bd5 CK	277	return;
dafc3bd5 CK	278
dafc3bd5	279	del_timer(&rdev->audio_timer);
5230aea6 RM	280
5230aea6 RM	281	r600_audio_engine_enable(rdev, false);
dafc3bd5	282	}