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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

 *          Rafał Miłecki

 */

#include 

#include 

#include 

#include "radeon.h"

#include "radeon_asic.h"

#include "evergreend.h"

#include "atom.h"

extern void dce6_afmt_write_speaker_allocation(struct drm_encoder *encoder);

extern void dce6_afmt_write_sad_regs(struct drm_encoder *encoder);

extern void dce6_afmt_select_pin(struct drm_encoder *encoder);

extern void dce6_afmt_write_latency_fields(struct drm_encoder *encoder,

					   struct drm_display_mode *mode);

/* enable the audio stream */

static void dce4_audio_enable(struct radeon_device *rdev,

			      struct r600_audio_pin *pin,

			      u8 enable_mask)

{

	u32 tmp = RREG32(AZ_HOT_PLUG_CONTROL);

	if (!pin)

		return;

	if (enable_mask) {

		tmp |= AUDIO_ENABLED;

		if (enable_mask & 1)

			tmp |= PIN0_AUDIO_ENABLED;

		if (enable_mask & 2)

			tmp |= PIN1_AUDIO_ENABLED;

		if (enable_mask & 4)

			tmp |= PIN2_AUDIO_ENABLED;

		if (enable_mask & 8)

			tmp |= PIN3_AUDIO_ENABLED;

	} else {

		tmp &= ~(AUDIO_ENABLED |

			 PIN0_AUDIO_ENABLED |

			 PIN1_AUDIO_ENABLED |

			 PIN2_AUDIO_ENABLED |

			 PIN3_AUDIO_ENABLED);

	}

	WREG32(AZ_HOT_PLUG_CONTROL, tmp);

}

/*

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

 */

static void evergreen_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(HDMI_ACR_32_0 + offset, HDMI_ACR_CTS_32(acr.cts_32khz));

	WREG32(HDMI_ACR_32_1 + offset, acr.n_32khz);

	WREG32(HDMI_ACR_44_0 + offset, HDMI_ACR_CTS_44(acr.cts_44_1khz));

	WREG32(HDMI_ACR_44_1 + offset, acr.n_44_1khz);

	WREG32(HDMI_ACR_48_0 + offset, HDMI_ACR_CTS_48(acr.cts_48khz));

	WREG32(HDMI_ACR_48_1 + offset, acr.n_48khz);

}

static void dce4_afmt_write_latency_fields(struct drm_encoder *encoder,

					   struct drm_display_mode *mode)

{

	struct radeon_device *rdev = encoder->dev->dev_private;

	struct drm_connector *connector;

	struct radeon_connector *radeon_connector = NULL;

	u32 tmp = 0;

	list_for_each_entry(connector, &encoder->dev->mode_config.connector_list, head) {

		if (connector->encoder == encoder) {

			radeon_connector = to_radeon_connector(connector);

			break;

		}

	}

	if (!radeon_connector) {

		DRM_ERROR("Couldn't find encoder's connector\n");

		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(255) | AUDIO_LIPSYNC(255);

	} else {

		if (connector->latency_present[0])

			tmp = VIDEO_LIPSYNC(connector->video_latency[0]) |

				AUDIO_LIPSYNC(connector->audio_latency[0]);

		else

			tmp = VIDEO_LIPSYNC(255) | AUDIO_LIPSYNC(255);

	}

	WREG32(AZ_F0_CODEC_PIN0_CONTROL_RESPONSE_LIPSYNC, tmp);

}

static void dce4_afmt_write_speaker_allocation(struct drm_encoder *encoder)

{

	struct radeon_device *rdev = encoder->dev->dev_private;

	struct drm_connector *connector;

	struct radeon_connector *radeon_connector = NULL;

	u32 tmp;

	u8 *sadb = NULL;

	int sad_count;

	list_for_each_entry(connector, &encoder->dev->mode_config.connector_list, head) {

		if (connector->encoder == encoder) {

			radeon_connector = to_radeon_connector(connector);

			break;

		}

	}

	if (!radeon_connector) {

		DRM_ERROR("Couldn't find encoder's connector\n");

		return;

	}

	sad_count = drm_edid_to_speaker_allocation(radeon_connector_edid(connector), &sadb);

	if (sad_count < 0) {

		DRM_DEBUG("Couldn't read Speaker Allocation Data Block: %d\n", sad_count);

		sad_count = 0;

	}

	/* program the speaker allocation */

	tmp = RREG32(AZ_F0_CODEC_PIN0_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(AZ_F0_CODEC_PIN0_CONTROL_CHANNEL_SPEAKER, tmp);

	kfree(sadb);

}

static void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder)

{

	struct radeon_device *rdev = encoder->dev->dev_private;

	struct drm_connector *connector;

	struct radeon_connector *radeon_connector = NULL;

	struct cea_sad *sads;

	int i, sad_count;

	static const u16 eld_reg_to_type[][2] = {

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR0, HDMI_AUDIO_CODING_TYPE_PCM },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR1, HDMI_AUDIO_CODING_TYPE_AC3 },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR2, HDMI_AUDIO_CODING_TYPE_MPEG1 },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR3, HDMI_AUDIO_CODING_TYPE_MP3 },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR4, HDMI_AUDIO_CODING_TYPE_MPEG2 },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR5, HDMI_AUDIO_CODING_TYPE_AAC_LC },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR6, HDMI_AUDIO_CODING_TYPE_DTS },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR7, HDMI_AUDIO_CODING_TYPE_ATRAC },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR9, HDMI_AUDIO_CODING_TYPE_EAC3 },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR10, HDMI_AUDIO_CODING_TYPE_DTS_HD },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR11, HDMI_AUDIO_CODING_TYPE_MLP },

		{ AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR13, HDMI_AUDIO_CODING_TYPE_WMA_PRO },

	};

	list_for_each_entry(connector, &encoder->dev->mode_config.connector_list, head) {

		if (connector->encoder == encoder) {

			radeon_connector = to_radeon_connector(connector);

			break;

		}

	}

	if (!radeon_connector) {

		DRM_ERROR("Couldn't find encoder's connector\n");

		return;

	}

	sad_count = drm_edid_to_sad(radeon_connector_edid(connector), &sads);

	if (sad_count <= 0) {

		DRM_ERROR("Couldn't read SADs: %d\n", sad_count);

		return;

	}

	BUG_ON(!sads);

	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(eld_reg_to_type[i][0], value);

	}

	kfree(sads);

}

/*

 * build a HDMI Video Info Frame

 */

static void evergreen_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;

	uint8_t *header = buffer;

	WREG32(AFMT_AVI_INFO0 + offset,

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

	WREG32(AFMT_AVI_INFO1 + offset,

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

	WREG32(AFMT_AVI_INFO2 + offset,

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

	WREG32(AFMT_AVI_INFO3 + offset,

		frame[0xC] | (frame[0xD] << 8) | (header[1] << 24));

}

static void evergreen_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;

	struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);

	u32 base_rate = 24000;

	u32 max_ratio = clock / base_rate;

	u32 dto_phase;

	u32 dto_modulo = clock;

	u32 wallclock_ratio;

	u32 dto_cntl;

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

		return;

	if (ASIC_IS_DCE6(rdev)) {

		dto_phase = 24 * 1000;

	} else {

		if (max_ratio >= 8) {

			dto_phase = 192 * 1000;

			wallclock_ratio = 3;

		} else if (max_ratio >= 4) {

			dto_phase = 96 * 1000;

			wallclock_ratio = 2;

		} else if (max_ratio >= 2) {

			dto_phase = 48 * 1000;

			wallclock_ratio = 1;

		} else {

			dto_phase = 24 * 1000;

			wallclock_ratio = 0;

		}

		dto_cntl = RREG32(DCCG_AUDIO_DTO0_CNTL) & ~DCCG_AUDIO_DTO_WALLCLOCK_RATIO_MASK;

		dto_cntl |= DCCG_AUDIO_DTO_WALLCLOCK_RATIO(wallclock_ratio);

		WREG32(DCCG_AUDIO_DTO0_CNTL, dto_cntl);

	}

	/* 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

	 */

	WREG32(DCCG_AUDIO_DTO_SOURCE, DCCG_AUDIO_DTO0_SOURCE_SEL(radeon_crtc->crtc_id));

	WREG32(DCCG_AUDIO_DTO0_PHASE, dto_phase);

	WREG32(DCCG_AUDIO_DTO0_MODULE, dto_modulo);

}

/*

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

 */

void evergreen_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;

	struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);

	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];

	struct hdmi_avi_infoframe frame;

	uint32_t offset;

	ssize_t err;

	uint32_t val;

	int bpc = 8;

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

		return;

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

	if (!dig->afmt->enabled)

		return;

	offset = dig->afmt->offset;

	/* hdmi deep color mode general control packets setup, if bpc > 8 */

	if (encoder->crtc) {

		struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);

		bpc = radeon_crtc->bpc;

	}

	/* disable audio prior to setting up hw */

	if (ASIC_IS_DCE6(rdev)) {

		dig->afmt->pin = dce6_audio_get_pin(rdev);

		dce6_audio_enable(rdev, dig->afmt->pin, 0);

	} else {

		dig->afmt->pin = r600_audio_get_pin(rdev);

		dce4_audio_enable(rdev, dig->afmt->pin, 0);

	}

	evergreen_audio_set_dto(encoder, mode->clock);

	WREG32(HDMI_VBI_PACKET_CONTROL + offset,

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

	WREG32(AFMT_AUDIO_CRC_CONTROL + offset, 0x1000);

	val = RREG32(HDMI_CONTROL + offset);

	val &= ~HDMI_DEEP_COLOR_ENABLE;

	val &= ~HDMI_DEEP_COLOR_DEPTH_MASK;

	switch (bpc) {

		case 0:

		case 6:

		case 8:

		case 16:

		default:

			DRM_DEBUG("%s: Disabling hdmi deep color for %d bpc.\n",

					 connector->name, bpc);

			break;

		case 10:

			val |= HDMI_DEEP_COLOR_ENABLE;

			val |= HDMI_DEEP_COLOR_DEPTH(HDMI_30BIT_DEEP_COLOR);

			DRM_DEBUG("%s: Enabling hdmi deep color 30 for 10 bpc.\n",

					 connector->name);

			break;

		case 12:

			val |= HDMI_DEEP_COLOR_ENABLE;

			val |= HDMI_DEEP_COLOR_DEPTH(HDMI_36BIT_DEEP_COLOR);

			DRM_DEBUG("%s: Enabling hdmi deep color 36 for 12 bpc.\n",

					 connector->name);

			break;

	}

	WREG32(HDMI_CONTROL + offset, val);

	WREG32(HDMI_VBI_PACKET_CONTROL + offset,

	       HDMI_NULL_SEND | /* send null packets when required */

	       HDMI_GC_SEND | /* send general control packets */

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

	WREG32(HDMI_INFOFRAME_CONTROL0 + offset,

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

	       HDMI_AUDIO_INFO_CONT); /* required for audio info values to be updated */

	WREG32(AFMT_INFOFRAME_CONTROL0 + offset,

	       AFMT_AUDIO_INFO_UPDATE); /* required for audio info values to be updated */

	WREG32(HDMI_INFOFRAME_CONTROL1 + offset,

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

	WREG32(HDMI_GC + offset, 0); /* unset HDMI_GC_AVMUTE */

	WREG32(HDMI_AUDIO_PACKET_CONTROL + offset,

	       HDMI_AUDIO_DELAY_EN(1) | /* set the default audio delay */

	       HDMI_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_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */

	/* fglrx clears sth in AFMT_AUDIO_PACKET_CONTROL2 here */

	if (bpc > 8)

		WREG32(HDMI_ACR_PACKET_CONTROL + offset,

		       HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */

	else

	WREG32(HDMI_ACR_PACKET_CONTROL + offset,

	       HDMI_ACR_SOURCE | /* select SW CTS value */

	       HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */

	evergreen_hdmi_update_ACR(encoder, mode->clock);

	WREG32(AFMT_60958_0 + offset,

	       AFMT_60958_CS_CHANNEL_NUMBER_L(1));

	WREG32(AFMT_60958_1 + offset,

	       AFMT_60958_CS_CHANNEL_NUMBER_R(2));

	WREG32(AFMT_60958_2 + offset,

	       AFMT_60958_CS_CHANNEL_NUMBER_2(3) |

	       AFMT_60958_CS_CHANNEL_NUMBER_3(4) |

	       AFMT_60958_CS_CHANNEL_NUMBER_4(5) |

	       AFMT_60958_CS_CHANNEL_NUMBER_5(6) |

	       AFMT_60958_CS_CHANNEL_NUMBER_6(7) |

	       AFMT_60958_CS_CHANNEL_NUMBER_7(8));

	if (ASIC_IS_DCE6(rdev)) {

		dce6_afmt_write_speaker_allocation(encoder);

	} else {

		dce4_afmt_write_speaker_allocation(encoder);

	}

	WREG32(AFMT_AUDIO_PACKET_CONTROL2 + offset,

	       AFMT_AUDIO_CHANNEL_ENABLE(0xff));

	/* fglrx sets 0x40 in 0x5f80 here */

	if (ASIC_IS_DCE6(rdev)) {

		dce6_afmt_select_pin(encoder);

		dce6_afmt_write_sad_regs(encoder);

		dce6_afmt_write_latency_fields(encoder, mode);

	} else {

		evergreen_hdmi_write_sad_regs(encoder);

		dce4_afmt_write_latency_fields(encoder, mode);

	}

	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;

	}

	evergreen_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));

	WREG32_OR(HDMI_INFOFRAME_CONTROL0 + offset,

		  HDMI_AVI_INFO_SEND | /* enable AVI info frames */

		  HDMI_AVI_INFO_CONT); /* required for audio info values to be updated */

	WREG32_P(HDMI_INFOFRAME_CONTROL1 + offset,

		 HDMI_AVI_INFO_LINE(2), /* anything other than 0 */

		 ~HDMI_AVI_INFO_LINE_MASK);

	WREG32_OR(AFMT_AUDIO_PACKET_CONTROL + offset,

		  AFMT_AUDIO_SAMPLE_SEND); /* send audio packets */

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

	WREG32(AFMT_RAMP_CONTROL0 + offset, 0x00FFFFFF);

	WREG32(AFMT_RAMP_CONTROL1 + offset, 0x007FFFFF);

	WREG32(AFMT_RAMP_CONTROL2 + offset, 0x00000001);

	WREG32(AFMT_RAMP_CONTROL3 + offset, 0x00000001);

	/* enable audio after to setting up hw */

	if (ASIC_IS_DCE6(rdev))

		dce6_audio_enable(rdev, dig->afmt->pin, 1);

	else

		dce4_audio_enable(rdev, dig->afmt->pin, 0xf);

}

void evergreen_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;

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

		return;

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

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

		return;

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

		return;

	if (!enable && dig->afmt->pin) {

		if (ASIC_IS_DCE6(rdev))

			dce6_audio_enable(rdev, dig->afmt->pin, 0);

		else

			dce4_audio_enable(rdev, dig->afmt->pin, 0);

		dig->afmt->pin = NULL;

	}

	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);

}