[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 "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;
	}

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