drivers/gpu/drm/radeon/evergreen_hdmi.c - kernel/msm-4.19 - Gitiles

 /*
  * 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 <linux/hdmi.h>
 #include <drm/drmP.h>
 #include <drm/radeon_drm.h>
 #include "radeon.h"
 #include "radeon_asic.h"
 #include "evergreend.h"
 #include "atom.h"

 /*
  * 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);
 }

 /*
  * 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;

 	/* 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(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));
 }

 /*
  * 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;
 	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(HDMI_VBI_PACKET_CONTROL + offset,
 	       HDMI_NULL_SEND); /* send null packets when required */

 	WREG32(AFMT_AUDIO_CRC_CONTROL + offset, 0x1000);

 	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 */

 	WREG32(HDMI_ACR_PACKET_CONTROL + offset,
 	       HDMI_ACR_AUTO_SEND | /* allow hw to sent ACR packets when required */
 	       HDMI_ACR_SOURCE); /* select SW CTS value */

 	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));

 	/* fglrx sets 0x0001005f | (x & 0x00fc0000) in 0x5f78 here */

 	WREG32(AFMT_AUDIO_PACKET_CONTROL2 + offset,
 	       AFMT_AUDIO_CHANNEL_ENABLE(0xff));

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

 	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);
 }
	/*
	* 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 <linux/hdmi.h>
	#include <drm/drmP.h>
	#include <drm/radeon_drm.h>
	#include "radeon.h"
	#include "radeon_asic.h"
	#include "evergreend.h"
	#include "atom.h"

	/*
	* 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);
	}

	/*
	* 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;

	/* 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(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));
	}

	/*
	* 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;
	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(HDMI_VBI_PACKET_CONTROL + offset,
	HDMI_NULL_SEND); /* send null packets when required */

	WREG32(AFMT_AUDIO_CRC_CONTROL + offset, 0x1000);

	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 */

	WREG32(HDMI_ACR_PACKET_CONTROL + offset,
	HDMI_ACR_AUTO_SEND \| /* allow hw to sent ACR packets when required */
	HDMI_ACR_SOURCE); /* select SW CTS value */

	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));

	/* fglrx sets 0x0001005f \| (x & 0x00fc0000) in 0x5f78 here */

	WREG32(AFMT_AUDIO_PACKET_CONTROL2 + offset,
	AFMT_AUDIO_CHANNEL_ENABLE(0xff));

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

	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);
	}