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/*

 * 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 

#include 

#include 

#include "radeon.h"

#include "radeon_asic.h"

#include "r600d.h"

#include "atom.h"

/*

 * HDMI color format

 */

enum r600_hdmi_color_format {

	RGB = 0,

	YCC_422 = 1,

	YCC_444 = 2

};

/*

 * IEC60958 status bits

 */

enum r600_hdmi_iec_status_bits {

	AUDIO_STATUS_DIG_ENABLE   = 0x01,

	AUDIO_STATUS_V	    = 0x02,

	AUDIO_STATUS_VCFG	 = 0x04,

	AUDIO_STATUS_EMPHASIS     = 0x08,

	AUDIO_STATUS_COPYRIGHT    = 0x10,

	AUDIO_STATUS_NONAUDIO     = 0x20,

	AUDIO_STATUS_PROFESSIONAL = 0x40,

	AUDIO_STATUS_LEVEL	= 0x80

};

static const struct radeon_hdmi_acr r600_hdmi_predefined_acr[] = {

    /*	     32kHz	  44.1kHz	48kHz    */

    /* Clock      N     CTS      N     CTS      N     CTS */

    {  25174,  4576,  28125,  7007,  31250,  6864,  28125 }, /*  25,20/1.001 MHz */

    {  25200,  4096,  25200,  6272,  28000,  6144,  25200 }, /*  25.20       MHz */

    {  27000,  4096,  27000,  6272,  30000,  6144,  27000 }, /*  27.00       MHz */

    {  27027,  4096,  27027,  6272,  30030,  6144,  27027 }, /*  27.00*1.001 MHz */

    {  54000,  4096,  54000,  6272,  60000,  6144,  54000 }, /*  54.00       MHz */

    {  54054,  4096,  54054,  6272,  60060,  6144,  54054 }, /*  54.00*1.001 MHz */

    {  74175, 11648, 210937, 17836, 234375, 11648, 140625 }, /*  74.25/1.001 MHz */

    {  74250,  4096,  74250,  6272,  82500,  6144,  74250 }, /*  74.25       MHz */

    { 148351, 11648, 421875,  8918, 234375,  5824, 140625 }, /* 148.50/1.001 MHz */

    { 148500,  4096, 148500,  6272, 165000,  6144, 148500 }, /* 148.50       MHz */

    {      0,  4096,      0,  6272,      0,  6144,      0 }  /* Other */

};

/*

 * calculate CTS value if it's not found in the table

 */

static void r600_hdmi_calc_cts(uint32_t clock, int *CTS, int N, int freq)

{

	if (*CTS == 0)

		*CTS = clock * N / (128 * freq) * 1000;

	DRM_DEBUG("Using ACR timing N=%d CTS=%d for frequency %d\n",

		  N, *CTS, freq);

}

struct radeon_hdmi_acr r600_hdmi_acr(uint32_t clock)

{

	struct radeon_hdmi_acr res;

	u8 i;

	for (i = 0; r600_hdmi_predefined_acr[i].clock != clock &&

	     r600_hdmi_predefined_acr[i].clock != 0; i++)

		;

	res = r600_hdmi_predefined_acr[i];

	/* In case some CTS are missing */

	r600_hdmi_calc_cts(clock, &res.cts_32khz, res.n_32khz, 32000);

	r600_hdmi_calc_cts(clock, &res.cts_44_1khz, res.n_44_1khz, 44100);

	r600_hdmi_calc_cts(clock, &res.cts_48khz, res.n_48khz, 48000);

	return res;

}

/*

 * update the N and CTS parameters for a given pixel clock rate

 */

static void r600_hdmi_update_ACR(struct drm_encoder *encoder, uint32_t clock)

{

	struct drm_device *dev = encoder->dev;

	struct radeon_device *rdev = dev->dev_private;

	struct radeon_hdmi_acr acr = r600_hdmi_acr(clock);

	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

	uint32_t offset = dig->afmt->offset;

	WREG32(HDMI0_ACR_32_0 + offset, HDMI0_ACR_CTS_32(acr.cts_32khz));

	WREG32(HDMI0_ACR_32_1 + offset, acr.n_32khz);

	WREG32(HDMI0_ACR_44_0 + offset, HDMI0_ACR_CTS_44(acr.cts_44_1khz));

	WREG32(HDMI0_ACR_44_1 + offset, acr.n_44_1khz);

	WREG32(HDMI0_ACR_48_0 + offset, HDMI0_ACR_CTS_48(acr.cts_48khz));

	WREG32(HDMI0_ACR_48_1 + offset, acr.n_48khz);

}

/*

 * build a HDMI Video Info Frame

 */

static void r600_hdmi_update_avi_infoframe(struct drm_encoder *encoder,

					   void *buffer, size_t size)

{

	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;

	uint32_t offset = dig->afmt->offset;

	uint8_t *frame = buffer + 3;

	/* Our header values (type, version, length) should be alright, Intel

	 * is using the same. Checksum function also seems to be OK, it works

	 * fine for audio infoframe. However calculated value is always lower

	 * by 2 in comparison to fglrx. It breaks displaying anything in case

	 * of TVs that strictly check the checksum. Hack it manually here to

	 * workaround this issue. */

	frame[0x0] += 2;

	WREG32(HDMI0_AVI_INFO0 + offset,

		frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));

	WREG32(HDMI0_AVI_INFO1 + offset,

		frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x7] << 24));

	WREG32(HDMI0_AVI_INFO2 + offset,

		frame[0x8] | (frame[0x9] << 8) | (frame[0xA] << 16) | (frame[0xB] << 24));

	WREG32(HDMI0_AVI_INFO3 + offset,

		frame[0xC] | (frame[0xD] << 8));

}

/*

 * build a Audio Info Frame

 */

static void r600_hdmi_update_audio_infoframe(struct drm_encoder *encoder,

					     const void *buffer, size_t size)

{

	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;

	uint32_t offset = dig->afmt->offset;

	const u8 *frame = buffer + 3;

	WREG32(HDMI0_AUDIO_INFO0 + offset,

		frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));

	WREG32(HDMI0_AUDIO_INFO1 + offset,

		frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x8] << 24));

}

/*

 * test if audio buffer is filled enough to start playing

 */

static bool r600_hdmi_is_audio_buffer_filled(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);

	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

	uint32_t offset = dig->afmt->offset;

	return (RREG32(HDMI0_STATUS + offset) & 0x10) != 0;

}

/*

 * have buffer status changed since last call?

 */

int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder)

{

	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

	int status, result;

	if (!dig->afmt || !dig->afmt->enabled)

		return 0;

	status = r600_hdmi_is_audio_buffer_filled(encoder);

	result = dig->afmt->last_buffer_filled_status != status;

	dig->afmt->last_buffer_filled_status = status;

	return result;

}

/*

 * write the audio workaround status to the hardware

 */

static void r600_hdmi_audio_workaround(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);

	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

	uint32_t offset = dig->afmt->offset;

	bool hdmi_audio_workaround = false; /* FIXME */

	u32 value;

	if (!hdmi_audio_workaround ||

	    r600_hdmi_is_audio_buffer_filled(encoder))

		value = 0; /* disable workaround */

	else

		value = HDMI0_AUDIO_TEST_EN; /* enable workaround */

	WREG32_P(HDMI0_AUDIO_PACKET_CONTROL + offset,

		 value, ~HDMI0_AUDIO_TEST_EN);

}

void r600_audio_set_dto(struct drm_encoder *encoder, u32 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;

	u32 base_rate = 24000;

	if (!dig || !dig->afmt)

		return;

	/* there are two DTOs selected by DCCG_AUDIO_DTO_SELECT.

	 * doesn't matter which one you use.  Just use the first one.

	 */

	/* XXX two dtos; generally use dto0 for hdmi */

	/* Express [24MHz / target pixel clock] as an exact rational

	 * number (coefficient of two integer numbers.  DCCG_AUDIO_DTOx_PHASE

	 * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator

	 */

	if (ASIC_IS_DCE3(rdev)) {

		/* according to the reg specs, this should DCE3.2 only, but in

		 * practice it seems to cover DCE3.0 as well.

		 */

		WREG32(DCCG_AUDIO_DTO0_PHASE, base_rate * 100);

		WREG32(DCCG_AUDIO_DTO0_MODULE, clock * 100);

		WREG32(DCCG_AUDIO_DTO_SELECT, 0); /* select DTO0 */

	} else {

		/* according to the reg specs, this should be DCE2.0 and DCE3.0 */

		WREG32(AUDIO_DTO, AUDIO_DTO_PHASE(base_rate / 10) |

		       AUDIO_DTO_MODULE(clock / 10));

	}

}

/*

 * update the info frames with the data from the current display mode

 */

void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode)

{

	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;

	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];

	struct hdmi_avi_infoframe frame;

	uint32_t offset;

	ssize_t err;

	/* Silent, r600_hdmi_enable will raise WARN for us */

	if (!dig->afmt->enabled)

		return;

	offset = dig->afmt->offset;

//	r600_audio_set_clock(encoder, mode->clock);

	WREG32(HDMI0_VBI_PACKET_CONTROL + offset,

	       HDMI0_NULL_SEND); /* send null packets when required */

	WREG32(HDMI0_AUDIO_CRC_CONTROL + offset, 0x1000);

	if (ASIC_IS_DCE32(rdev)) {

		WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,

		       HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */

		       HDMI0_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */

		WREG32(AFMT_AUDIO_PACKET_CONTROL + offset,

		       AFMT_AUDIO_SAMPLE_SEND | /* send audio packets */

		       AFMT_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */

	} else {

		WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,

		       HDMI0_AUDIO_SAMPLE_SEND | /* send audio packets */

		       HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */

		       HDMI0_AUDIO_PACKETS_PER_LINE(3) | /* should be suffient for all audio modes and small enough for all hblanks */

		       HDMI0_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */

	}

	WREG32(HDMI0_ACR_PACKET_CONTROL + offset,

	       HDMI0_ACR_AUTO_SEND | /* allow hw to sent ACR packets when required */

	       HDMI0_ACR_SOURCE); /* select SW CTS value */

	WREG32(HDMI0_VBI_PACKET_CONTROL + offset,

	       HDMI0_NULL_SEND | /* send null packets when required */

	       HDMI0_GC_SEND | /* send general control packets */

	       HDMI0_GC_CONT); /* send general control packets every frame */

	/* TODO: HDMI0_AUDIO_INFO_UPDATE */

	WREG32(HDMI0_INFOFRAME_CONTROL0 + offset,

	       HDMI0_AVI_INFO_SEND | /* enable AVI info frames */

	       HDMI0_AVI_INFO_CONT | /* send AVI info frames every frame/field */

	       HDMI0_AUDIO_INFO_SEND | /* enable audio info frames (frames won't be set until audio is enabled) */

	       HDMI0_AUDIO_INFO_CONT); /* send audio info frames every frame/field */

	WREG32(HDMI0_INFOFRAME_CONTROL1 + offset,

	       HDMI0_AVI_INFO_LINE(2) | /* anything other than 0 */

	       HDMI0_AUDIO_INFO_LINE(2)); /* anything other than 0 */

	WREG32(HDMI0_GC + offset, 0); /* unset HDMI0_GC_AVMUTE */

	err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);

	if (err < 0) {

		DRM_ERROR("failed to setup AVI infoframe: %zd\n", err);

		return;

	}

	err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));

	if (err < 0) {

		DRM_ERROR("failed to pack AVI infoframe: %zd\n", err);

		return;

	}

	r600_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));

	r600_hdmi_update_ACR(encoder, mode->clock);

	/* it's unknown what these bits do excatly, but it's indeed quite useful for debugging */

	WREG32(HDMI0_RAMP_CONTROL0 + offset, 0x00FFFFFF);

	WREG32(HDMI0_RAMP_CONTROL1 + offset, 0x007FFFFF);

	WREG32(HDMI0_RAMP_CONTROL2 + offset, 0x00000001);

	WREG32(HDMI0_RAMP_CONTROL3 + offset, 0x00000001);

	r600_hdmi_audio_workaround(encoder);

}

#if 0

/*

 * update settings with current parameters from audio engine

 */

void r600_hdmi_update_audio_settings(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);

	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

	struct r600_audio audio = r600_audio_status(rdev);

	uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];

	struct hdmi_audio_infoframe frame;

	uint32_t offset;

	uint32_t iec;

	ssize_t err;

	if (!dig->afmt || !dig->afmt->enabled)

		return;

	offset = dig->afmt->offset;

	DRM_DEBUG("%s with %d channels, %d Hz sampling rate, %d bits per sample,\n",

		 r600_hdmi_is_audio_buffer_filled(encoder) ? "playing" : "stopped",

		  audio.channels, audio.rate, audio.bits_per_sample);

	DRM_DEBUG("0x%02X IEC60958 status bits and 0x%02X category code\n",

		  (int)audio.status_bits, (int)audio.category_code);

	iec = 0;

	if (audio.status_bits & AUDIO_STATUS_PROFESSIONAL)

		iec |= 1 << 0;

	if (audio.status_bits & AUDIO_STATUS_NONAUDIO)

		iec |= 1 << 1;

	if (audio.status_bits & AUDIO_STATUS_COPYRIGHT)

		iec |= 1 << 2;

	if (audio.status_bits & AUDIO_STATUS_EMPHASIS)

		iec |= 1 << 3;

	iec |= HDMI0_60958_CS_CATEGORY_CODE(audio.category_code);

	switch (audio.rate) {

	case 32000:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x3);

		break;

	case 44100:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x0);

		break;

	case 48000:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x2);

		break;

	case 88200:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x8);

		break;

	case 96000:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xa);

		break;

	case 176400:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xc);

		break;

	case 192000:

		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xe);

		break;

	}

	WREG32(HDMI0_60958_0 + offset, iec);

	iec = 0;

	switch (audio.bits_per_sample) {

	case 16:

		iec |= HDMI0_60958_CS_WORD_LENGTH(0x2);

			break;

	case 20:

		iec |= HDMI0_60958_CS_WORD_LENGTH(0x3);

			break;

	case 24:

		iec |= HDMI0_60958_CS_WORD_LENGTH(0xb);

			break;

		}

	if (audio.status_bits & AUDIO_STATUS_V)

		iec |= 0x5 << 16;

	WREG32_P(HDMI0_60958_1 + offset, iec, ~0x5000f);

	err = hdmi_audio_infoframe_init(&frame);

	if (err < 0) {

		DRM_ERROR("failed to setup audio infoframe\n");

		return;

	}

	frame.channels = audio.channels;

	err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));

	if (err < 0) {

		DRM_ERROR("failed to pack audio infoframe\n");

		return;

	}

	r600_hdmi_update_audio_infoframe(encoder, buffer, sizeof(buffer));

	r600_hdmi_audio_workaround(encoder);

}

#endif

/*

 * enable the HDMI engine

 */

void r600_hdmi_enable(struct drm_encoder *encoder, bool enable)

{

	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;

	u32 hdmi = HDMI0_ERROR_ACK;

	/* Silent, r600_hdmi_enable will raise WARN for us */

	if (enable && dig->afmt->enabled)

		return;

	if (!enable && !dig->afmt->enabled)

		return;

	/* Older chipsets require setting HDMI and routing manually */

	if (!ASIC_IS_DCE3(rdev)) {

		if (enable)

			hdmi |= HDMI0_ENABLE;

	switch (radeon_encoder->encoder_id) {

	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:

			if (enable) {

				WREG32_OR(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN);

			hdmi |= HDMI0_STREAM(HDMI0_STREAM_TMDSA);

			} else {

				WREG32_AND(AVIVO_TMDSA_CNTL, ~AVIVO_TMDSA_CNTL_HDMI_EN);

			}

		break;

	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:

			if (enable) {

				WREG32_OR(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN);

			hdmi |= HDMI0_STREAM(HDMI0_STREAM_LVTMA);

			} else {

				WREG32_AND(AVIVO_LVTMA_CNTL, ~AVIVO_LVTMA_CNTL_HDMI_EN);

			}

			break;

		case ENCODER_OBJECT_ID_INTERNAL_DDI:

			if (enable) {

				WREG32_OR(DDIA_CNTL, DDIA_HDMI_EN);

			hdmi |= HDMI0_STREAM(HDMI0_STREAM_DDIA);

			} else {

				WREG32_AND(DDIA_CNTL, ~DDIA_HDMI_EN);

			}

			break;

		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:

			if (enable)

			hdmi |= HDMI0_STREAM(HDMI0_STREAM_DVOA);

		break;

	default:

			dev_err(rdev->dev, "Invalid encoder for HDMI: 0x%X\n",

				radeon_encoder->encoder_id);

		break;

	}

		WREG32(HDMI0_CONTROL + dig->afmt->offset, hdmi);

	}

	if (rdev->irq.installed) {

		/* if irq is available use it */

		/* XXX: shouldn't need this on any asics.  Double check DCE2/3 */

//       if (enable)

//           radeon_irq_kms_enable_afmt(rdev, dig->afmt->id);

//       else

//           radeon_irq_kms_disable_afmt(rdev, dig->afmt->id);

	}

	dig->afmt->enabled = enable;

	DRM_DEBUG("%sabling HDMI interface @ 0x%04X for encoder 0x%x\n",

		  enable ? "En" : "Dis", dig->afmt->offset, radeon_encoder->encoder_id);

}