/*
 * Copyright 2013 Advanced Micro Devices, Inc.
 *
 * 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.
 *
 */
#include <linux/hdmi.h>
#include <drm/drm_edid.h>

#include "dce6_afmt.h"
#include "radeon.h"
#include "radeon_audio.h"
#include "sid.h"

#define DCE8_DCCG_AUDIO_DTO1_PHASE	0x05b8
#define DCE8_DCCG_AUDIO_DTO1_MODULE	0x05bc

u32 dce6_endpoint_rreg(struct radeon_device *rdev,
			      u32 block_offset, u32 reg)
{
	unsigned long flags;
	u32 r;

	spin_lock_irqsave(&rdev->end_idx_lock, flags);
	WREG32(AZ_F0_CODEC_ENDPOINT_INDEX + block_offset, reg);
	r = RREG32(AZ_F0_CODEC_ENDPOINT_DATA + block_offset);
	spin_unlock_irqrestore(&rdev->end_idx_lock, flags);

	return r;
}

void dce6_endpoint_wreg(struct radeon_device *rdev,
			       u32 block_offset, u32 reg, u32 v)
{
	unsigned long flags;

	spin_lock_irqsave(&rdev->end_idx_lock, flags);
	if (ASIC_IS_DCE8(rdev))
		WREG32(AZ_F0_CODEC_ENDPOINT_INDEX + block_offset, reg);
	else
		WREG32(AZ_F0_CODEC_ENDPOINT_INDEX + block_offset,
		       AZ_ENDPOINT_REG_WRITE_EN | AZ_ENDPOINT_REG_INDEX(reg));
	WREG32(AZ_F0_CODEC_ENDPOINT_DATA + block_offset, v);
	spin_unlock_irqrestore(&rdev->end_idx_lock, flags);
}

static void dce6_afmt_get_connected_pins(struct radeon_device *rdev)
{
	int i;
	u32 offset, tmp;

	for (i = 0; i < rdev->audio.num_pins; i++) {
		offset = rdev->audio.pin[i].offset;
		tmp = RREG32_ENDPOINT(offset,
				      AZ_F0_CODEC_PIN_CONTROL_RESPONSE_CONFIGURATION_DEFAULT);
		if (((tmp & PORT_CONNECTIVITY_MASK) >> PORT_CONNECTIVITY_SHIFT) == 1)
			rdev->audio.pin[i].connected = false;
		else
			rdev->audio.pin[i].connected = true;
	}
}

struct r600_audio_pin *dce6_audio_get_pin(struct radeon_device *rdev)
{
	struct drm_encoder *encoder;
	struct radeon_encoder *radeon_encoder;
	struct radeon_encoder_atom_dig *dig;
	struct r600_audio_pin *pin = NULL;
	int i, pin_count;

	dce6_afmt_get_connected_pins(rdev);

	for (i = 0; i < rdev->audio.num_pins; i++) {
		if (rdev->audio.pin[i].connected) {
			pin = &rdev->audio.pin[i];
			pin_count = 0;

			list_for_each_entry(encoder, &rdev_to_drm(rdev)->mode_config.encoder_list, head) {
				if (radeon_encoder_is_digital(encoder)) {
					radeon_encoder = to_radeon_encoder(encoder);
					dig = radeon_encoder->enc_priv;
					if (dig->pin == pin)
						pin_count++;
				}
			}

			if (pin_count == 0)
				return pin;
		}
	}
	if (!pin)
		DRM_ERROR("No connected audio pins found!\n");
	return pin;
}

void dce6_afmt_select_pin(struct drm_encoder *encoder)
{
	struct radeon_device *rdev = encoder->dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

	if (!dig || !dig->afmt || !dig->pin)
		return;

	WREG32(AFMT_AUDIO_SRC_CONTROL +  dig->afmt->offset,
	       AFMT_AUDIO_SRC_SELECT(dig->pin->id));
}

void dce6_afmt_write_latency_fields(struct drm_encoder *encoder,
				    struct drm_connector *connector,
				    struct drm_display_mode *mode)
{
	struct radeon_device *rdev = encoder->dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
	u32 tmp = 0;

	if (!dig || !dig->afmt || !dig->pin)
		return;

	if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
		if (connector->latency_present[1])
			tmp = VIDEO_LIPSYNC(connector->video_latency[1]) |
				AUDIO_LIPSYNC(connector->audio_latency[1]);
		else
			tmp = VIDEO_LIPSYNC(0) | AUDIO_LIPSYNC(0);
	} else {
		if (connector->latency_present[0])
			tmp = VIDEO_LIPSYNC(connector->video_latency[0]) |
				AUDIO_LIPSYNC(connector->audio_latency[0]);
		else
			tmp = VIDEO_LIPSYNC(0) | AUDIO_LIPSYNC(0);
	}
	WREG32_ENDPOINT(dig->pin->offset,
			AZ_F0_CODEC_PIN_CONTROL_RESPONSE_LIPSYNC, tmp);
}

void dce6_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
					     u8 *sadb, int sad_count)
{
	struct radeon_device *rdev = encoder->dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
	u32 tmp;

	if (!dig || !dig->afmt || !dig->pin)
		return;

	/* program the speaker allocation */
	tmp = RREG32_ENDPOINT(dig->pin->offset,
			      AZ_F0_CODEC_PIN_CONTROL_CHANNEL_SPEAKER);
	tmp &= ~(DP_CONNECTION | SPEAKER_ALLOCATION_MASK);
	/* set HDMI mode */
	tmp |= HDMI_CONNECTION;
	if (sad_count)
		tmp |= SPEAKER_ALLOCATION(sadb[0]);
	else
		tmp |= SPEAKER_ALLOCATION(5); /* stereo */
	WREG32_ENDPOINT(dig->pin->offset,
			AZ_F0_CODEC_PIN_CONTROL_CHANNEL_SPEAKER, tmp);
}

void dce6_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
					   u8 *sadb, int sad_count)
{
	struct radeon_device *rdev = encoder->dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
	u32 tmp;

	if (!dig || !dig->afmt || !dig->pin)
		return;

	/* program the speaker allocation */
	tmp = RREG32_ENDPOINT(dig->pin->offset,
			      AZ_F0_CODEC_PIN_CONTROL_CHANNEL_SPEAKER);
	tmp &= ~(HDMI_CONNECTION | SPEAKER_ALLOCATION_MASK);
	/* set DP mode */
	tmp |= DP_CONNECTION;
	if (sad_count)
		tmp |= SPEAKER_ALLOCATION(sadb[0]);
	else
		tmp |= SPEAKER_ALLOCATION(5); /* stereo */
	WREG32_ENDPOINT(dig->pin->offset,
			AZ_F0_CODEC_PIN_CONTROL_CHANNEL_SPEAKER, tmp);
}

void dce6_afmt_write_sad_regs(struct drm_encoder *encoder,
			      struct cea_sad *sads, int sad_count)
{
	int i;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
	struct radeon_device *rdev = encoder->dev->dev_private;
	static const u16 eld_reg_to_type[][2] = {
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR0, HDMI_AUDIO_CODING_TYPE_PCM },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR1, HDMI_AUDIO_CODING_TYPE_AC3 },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR2, HDMI_AUDIO_CODING_TYPE_MPEG1 },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR3, HDMI_AUDIO_CODING_TYPE_MP3 },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR4, HDMI_AUDIO_CODING_TYPE_MPEG2 },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR5, HDMI_AUDIO_CODING_TYPE_AAC_LC },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR6, HDMI_AUDIO_CODING_TYPE_DTS },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR7, HDMI_AUDIO_CODING_TYPE_ATRAC },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR9, HDMI_AUDIO_CODING_TYPE_EAC3 },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR10, HDMI_AUDIO_CODING_TYPE_DTS_HD },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR11, HDMI_AUDIO_CODING_TYPE_MLP },
		{ AZ_F0_CODEC_PIN_CONTROL_AUDIO_DESCRIPTOR13, HDMI_AUDIO_CODING_TYPE_WMA_PRO },
	};

	if (!dig || !dig->afmt || !dig->pin)
		return;

	for (i = 0; i < ARRAY_SIZE(eld_reg_to_type); i++) {
		u32 value = 0;
		u8 stereo_freqs = 0;
		int max_channels = -1;
		int j;

		for (j = 0; j < sad_count; j++) {
			struct cea_sad *sad = &sads[j];

			if (sad->format == eld_reg_to_type[i][1]) {
				if (sad->channels > max_channels) {
					value = MAX_CHANNELS(sad->channels) |
						DESCRIPTOR_BYTE_2(sad->byte2) |
						SUPPORTED_FREQUENCIES(sad->freq);
					max_channels = sad->channels;
				}

				if (sad->format == HDMI_AUDIO_CODING_TYPE_PCM)
					stereo_freqs |= sad->freq;
				else
					break;
			}
		}

		value |= SUPPORTED_FREQUENCIES_STEREO(stereo_freqs);

		WREG32_ENDPOINT(dig->pin->offset, eld_reg_to_type[i][0], value);
	}
}

void dce6_audio_enable(struct radeon_device *rdev,
		       struct r600_audio_pin *pin,
		       u8 enable_mask)
{
	if (!pin)
		return;

	WREG32_ENDPOINT(pin->offset, AZ_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL,
			enable_mask ? AUDIO_ENABLED : 0);
}

void dce6_hdmi_audio_set_dto(struct radeon_device *rdev,
			     struct radeon_crtc *crtc, unsigned int clock)
{
	/* Two dtos; generally use dto0 for HDMI */
	u32 value = 0;

	if (crtc)
		value |= DCCG_AUDIO_DTO0_SOURCE_SEL(crtc->crtc_id);

	WREG32(DCCG_AUDIO_DTO_SOURCE, value);

	/* 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
	 */
	WREG32(DCCG_AUDIO_DTO0_PHASE, 24000);
	WREG32(DCCG_AUDIO_DTO0_MODULE, clock);
}

void dce6_dp_audio_set_dto(struct radeon_device *rdev,
			   struct radeon_crtc *crtc, unsigned int clock)
{
	/* Two dtos; generally use dto1 for DP */
	u32 value = 0;
	value |= DCCG_AUDIO_DTO_SEL;

	if (crtc)
		value |= DCCG_AUDIO_DTO0_SOURCE_SEL(crtc->crtc_id);

	WREG32(DCCG_AUDIO_DTO_SOURCE, value);

	/* 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_DCE8(rdev)) {
		unsigned int div = (RREG32(DENTIST_DISPCLK_CNTL) &
			DENTIST_DPREFCLK_WDIVIDER_MASK) >>
			DENTIST_DPREFCLK_WDIVIDER_SHIFT;
		div = radeon_audio_decode_dfs_div(div);

		if (div)
			clock = clock * 100 / div;

		WREG32(DCE8_DCCG_AUDIO_DTO1_PHASE, 24000);
		WREG32(DCE8_DCCG_AUDIO_DTO1_MODULE, clock);
	} else {
		WREG32(DCCG_AUDIO_DTO1_PHASE, 24000);
		WREG32(DCCG_AUDIO_DTO1_MODULE, clock);
	}
}