[PATCH v4 2/5] drm/msm/dp: add audio support for Display Port on MSM
Abhinav Kumar
abhinavk at codeaurora.org
Mon Aug 31 18:22:55 UTC 2020
Introduce audio support for Display Port on MSM chipsets.
This change integrates DP audio sub-module with the main
Display Port platform driver.
In addition, this change leverages hdmi_codec_ops to expose
the operations to the audio driver.
Changes in v2: fix up a compilation issue on drm-next branch
Changes in v3: none
Changes in v4: none
Signed-off-by: Abhinav Kumar <abhinavk at codeaurora.org>
---
drivers/gpu/drm/msm/Makefile | 3 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 7 +
drivers/gpu/drm/msm/dp/dp_audio.c | 583 ++++++++++++++++++++
drivers/gpu/drm/msm/dp/dp_audio.h | 72 +++
drivers/gpu/drm/msm/dp/dp_catalog.c | 192 +++++++
drivers/gpu/drm/msm/dp/dp_catalog.h | 29 +
drivers/gpu/drm/msm/dp/dp_display.c | 48 ++
drivers/gpu/drm/msm/dp/dp_display.h | 2 +
8 files changed, 935 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/msm/dp/dp_audio.c
create mode 100644 drivers/gpu/drm/msm/dp/dp_audio.h
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 6d31188cc776..db1bdd35bbf5 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -111,7 +111,8 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \
dp/dp_parser.o \
dp/dp_power.o \
dp/dp_pll.o \
- dp/dp_pll_10nm.o
+ dp/dp_pll_10nm.o \
+ dp/dp_audio.o
msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o
msm-$(CONFIG_COMMON_CLK) += disp/mdp4/mdp4_lvds_pll.o
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 292eea6e139e..316da9a8c791 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -1139,6 +1139,13 @@ static void _dpu_encoder_virt_enable_helper(struct drm_encoder *drm_enc)
return;
}
+
+ if (dpu_enc->disp_info.intf_type == DRM_MODE_CONNECTOR_DisplayPort &&
+ dpu_enc->cur_master->hw_mdptop &&
+ dpu_enc->cur_master->hw_mdptop->ops.intf_audio_select)
+ dpu_enc->cur_master->hw_mdptop->ops.intf_audio_select(
+ dpu_enc->cur_master->hw_mdptop);
+
_dpu_encoder_update_vsync_source(dpu_enc, &dpu_enc->disp_info);
if (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_DSI &&
diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
new file mode 100644
index 000000000000..75556eea1059
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
+ */
+
+
+#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__
+
+#include <linux/of_platform.h>
+
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_edid.h>
+#include <sound/hdmi-codec.h>
+
+#include "dp_catalog.h"
+#include "dp_audio.h"
+#include "dp_panel.h"
+#include "dp_display.h"
+
+#define HEADER_BYTE_2_BIT 0
+#define PARITY_BYTE_2_BIT 8
+#define HEADER_BYTE_1_BIT 16
+#define PARITY_BYTE_1_BIT 24
+#define HEADER_BYTE_3_BIT 16
+#define PARITY_BYTE_3_BIT 24
+
+struct dp_audio_private {
+ struct platform_device *audio_pdev;
+ struct platform_device *pdev;
+ struct dp_catalog *catalog;
+ struct dp_panel *panel;
+
+ bool engine_on;
+ u32 channels;
+
+ struct dp_audio dp_audio;
+};
+
+static u8 dp_audio_get_g0_value(u8 data)
+{
+ u8 c[4];
+ u8 g[4];
+ u8 ret_data = 0;
+ u8 i;
+
+ for (i = 0; i < 4; i++)
+ c[i] = (data >> i) & 0x01;
+
+ g[0] = c[3];
+ g[1] = c[0] ^ c[3];
+ g[2] = c[1];
+ g[3] = c[2];
+
+ for (i = 0; i < 4; i++)
+ ret_data = ((g[i] & 0x01) << i) | ret_data;
+
+ return ret_data;
+}
+
+static u8 dp_audio_get_g1_value(u8 data)
+{
+ u8 c[4];
+ u8 g[4];
+ u8 ret_data = 0;
+ u8 i;
+
+ for (i = 0; i < 4; i++)
+ c[i] = (data >> i) & 0x01;
+
+ g[0] = c[0] ^ c[3];
+ g[1] = c[0] ^ c[1] ^ c[3];
+ g[2] = c[1] ^ c[2];
+ g[3] = c[2] ^ c[3];
+
+ for (i = 0; i < 4; i++)
+ ret_data = ((g[i] & 0x01) << i) | ret_data;
+
+ return ret_data;
+}
+
+static u8 dp_audio_calculate_parity(u32 data)
+{
+ u8 x0 = 0;
+ u8 x1 = 0;
+ u8 ci = 0;
+ u8 iData = 0;
+ u8 i = 0;
+ u8 parity_byte;
+ u8 num_byte = (data & 0xFF00) > 0 ? 8 : 2;
+
+ for (i = 0; i < num_byte; i++) {
+ iData = (data >> i*4) & 0xF;
+
+ ci = iData ^ x1;
+ x1 = x0 ^ dp_audio_get_g1_value(ci);
+ x0 = dp_audio_get_g0_value(ci);
+ }
+
+ parity_byte = x1 | (x0 << 4);
+
+ return parity_byte;
+}
+
+static u32 dp_audio_get_header(struct dp_catalog *catalog,
+ enum dp_catalog_audio_sdp_type sdp,
+ enum dp_catalog_audio_header_type header)
+{
+ catalog->sdp_type = sdp;
+ catalog->sdp_header = header;
+ dp_catalog_audio_get_header(catalog);
+
+ return catalog->audio_data;
+}
+
+static void dp_audio_set_header(struct dp_catalog *catalog,
+ u32 data,
+ enum dp_catalog_audio_sdp_type sdp,
+ enum dp_catalog_audio_header_type header)
+{
+ catalog->sdp_type = sdp;
+ catalog->sdp_header = header;
+ catalog->audio_data = data;
+ dp_catalog_audio_set_header(catalog);
+}
+
+static void dp_audio_stream_sdp(struct dp_audio_private *audio)
+{
+ struct dp_catalog *catalog = audio->catalog;
+ u32 value, new_value;
+ u8 parity_byte;
+
+ /* Config header and parity byte 1 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1);
+
+ new_value = 0x02;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_1_BIT)
+ | (parity_byte << PARITY_BYTE_1_BIT));
+ DRM_DEBUG_DP("Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1);
+
+ /* Config header and parity byte 2 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2);
+ new_value = value;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_2_BIT)
+ | (parity_byte << PARITY_BYTE_2_BIT));
+ DRM_DEBUG_DP("Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2);
+
+ /* Config header and parity byte 3 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3);
+
+ new_value = audio->channels - 1;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_3_BIT)
+ | (parity_byte << PARITY_BYTE_3_BIT));
+ DRM_DEBUG_DP("Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_timestamp_sdp(struct dp_audio_private *audio)
+{
+ struct dp_catalog *catalog = audio->catalog;
+ u32 value, new_value;
+ u8 parity_byte;
+
+ /* Config header and parity byte 1 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1);
+
+ new_value = 0x1;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_1_BIT)
+ | (parity_byte << PARITY_BYTE_1_BIT));
+ DRM_DEBUG_DP("Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1);
+
+ /* Config header and parity byte 2 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2);
+
+ new_value = 0x17;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_2_BIT)
+ | (parity_byte << PARITY_BYTE_2_BIT));
+ DRM_DEBUG_DP("Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2);
+
+ /* Config header and parity byte 3 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3);
+
+ new_value = (0x0 | (0x11 << 2));
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_3_BIT)
+ | (parity_byte << PARITY_BYTE_3_BIT));
+ DRM_DEBUG_DP("Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_infoframe_sdp(struct dp_audio_private *audio)
+{
+ struct dp_catalog *catalog = audio->catalog;
+ u32 value, new_value;
+ u8 parity_byte;
+
+ /* Config header and parity byte 1 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1);
+
+ new_value = 0x84;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_1_BIT)
+ | (parity_byte << PARITY_BYTE_1_BIT));
+ DRM_DEBUG_DP("Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1);
+
+ /* Config header and parity byte 2 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2);
+
+ new_value = 0x1b;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_2_BIT)
+ | (parity_byte << PARITY_BYTE_2_BIT));
+ DRM_DEBUG_DP("Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2);
+
+ /* Config header and parity byte 3 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3);
+
+ new_value = (0x0 | (0x11 << 2));
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_3_BIT)
+ | (parity_byte << PARITY_BYTE_3_BIT));
+ DRM_DEBUG_DP("Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+ new_value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_copy_management_sdp(struct dp_audio_private *audio)
+{
+ struct dp_catalog *catalog = audio->catalog;
+ u32 value, new_value;
+ u8 parity_byte;
+
+ /* Config header and parity byte 1 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1);
+
+ new_value = 0x05;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_1_BIT)
+ | (parity_byte << PARITY_BYTE_1_BIT));
+ DRM_DEBUG_DP("Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1);
+
+ /* Config header and parity byte 2 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2);
+
+ new_value = 0x0F;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_2_BIT)
+ | (parity_byte << PARITY_BYTE_2_BIT));
+ DRM_DEBUG_DP("Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2);
+
+ /* Config header and parity byte 3 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3);
+
+ new_value = 0x0;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_3_BIT)
+ | (parity_byte << PARITY_BYTE_3_BIT));
+ DRM_DEBUG_DP("Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_isrc_sdp(struct dp_audio_private *audio)
+{
+ struct dp_catalog *catalog = audio->catalog;
+ u32 value, new_value;
+ u8 parity_byte;
+
+ /* Config header and parity byte 1 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1);
+
+ new_value = 0x06;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_1_BIT)
+ | (parity_byte << PARITY_BYTE_1_BIT));
+ DRM_DEBUG_DP("Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1);
+
+ /* Config header and parity byte 2 */
+ value = dp_audio_get_header(catalog,
+ DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2);
+
+ new_value = 0x0F;
+ parity_byte = dp_audio_calculate_parity(new_value);
+ value |= ((new_value << HEADER_BYTE_2_BIT)
+ | (parity_byte << PARITY_BYTE_2_BIT));
+ DRM_DEBUG_DP("Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+ value, parity_byte);
+ dp_audio_set_header(catalog, value,
+ DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2);
+}
+
+static void dp_audio_setup_sdp(struct dp_audio_private *audio)
+{
+ dp_catalog_audio_config_sdp(audio->catalog);
+
+ dp_audio_stream_sdp(audio);
+ dp_audio_timestamp_sdp(audio);
+ dp_audio_infoframe_sdp(audio);
+ dp_audio_copy_management_sdp(audio);
+ dp_audio_isrc_sdp(audio);
+}
+
+static void dp_audio_setup_acr(struct dp_audio_private *audio)
+{
+ u32 select = 0;
+ struct dp_catalog *catalog = audio->catalog;
+
+ switch (audio->dp_audio.bw_code) {
+ case DP_LINK_BW_1_62:
+ select = 0;
+ break;
+ case DP_LINK_BW_2_7:
+ select = 1;
+ break;
+ case DP_LINK_BW_5_4:
+ select = 2;
+ break;
+ case DP_LINK_BW_8_1:
+ select = 3;
+ break;
+ default:
+ DRM_DEBUG_DP("Unknown link rate\n");
+ select = 0;
+ break;
+ }
+
+ catalog->audio_data = select;
+ dp_catalog_audio_config_acr(catalog);
+}
+
+static void dp_audio_safe_to_exit_level(struct dp_audio_private *audio)
+{
+ struct dp_catalog *catalog = audio->catalog;
+ u32 safe_to_exit_level = 0;
+
+ switch (audio->dp_audio.lane_count) {
+ case 1:
+ safe_to_exit_level = 14;
+ break;
+ case 2:
+ safe_to_exit_level = 8;
+ break;
+ case 4:
+ safe_to_exit_level = 5;
+ break;
+ default:
+ DRM_DEBUG_DP("setting the default safe_to_exit_level = %u\n",
+ safe_to_exit_level);
+ safe_to_exit_level = 14;
+ break;
+ }
+
+ catalog->audio_data = safe_to_exit_level;
+ dp_catalog_audio_sfe_level(catalog);
+}
+
+static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
+{
+ struct dp_catalog *catalog = audio->catalog;
+
+ catalog->audio_data = enable;
+ dp_catalog_audio_enable(catalog);
+
+ audio->engine_on = enable;
+}
+
+static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
+{
+ struct dp_audio *dp_audio;
+ struct msm_dp *dp_display;
+
+ if (!pdev) {
+ DRM_ERROR("invalid input\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ dp_display = platform_get_drvdata(pdev);
+ if (!dp_display) {
+ DRM_ERROR("invalid input\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ dp_audio = dp_display->dp_audio;
+
+ if (!dp_audio) {
+ DRM_ERROR("invalid dp_audio data\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ return container_of(dp_audio, struct dp_audio_private, dp_audio);
+}
+
+static int dp_audio_get_eld(struct device *dev,
+ void *data, uint8_t *buf, size_t len)
+{
+ struct platform_device *pdev;
+ struct msm_dp *dp_display;
+
+ pdev = to_platform_device(dev);
+
+ if (!pdev) {
+ DRM_ERROR("invalid input\n");
+ return -ENODEV;
+ }
+
+ dp_display = platform_get_drvdata(pdev);
+ if (!dp_display) {
+ DRM_ERROR("invalid input\n");
+ return -ENODEV;
+ }
+
+ memcpy(buf, dp_display->connector->eld,
+ min(sizeof(dp_display->connector->eld), len));
+
+ return 0;
+}
+
+int dp_audio_hw_params(struct device *dev,
+ void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
+{
+ int rc = 0;
+ struct dp_audio_private *audio;
+ struct platform_device *pdev;
+
+ pdev = to_platform_device(dev);
+
+ audio = dp_audio_get_data(pdev);
+ if (IS_ERR(audio)) {
+ rc = PTR_ERR(audio);
+ goto end;
+ }
+
+ audio->channels = params->channels;
+
+ dp_audio_setup_sdp(audio);
+ dp_audio_setup_acr(audio);
+ dp_audio_safe_to_exit_level(audio);
+ dp_audio_enable(audio, true);
+end:
+ return rc;
+}
+
+static void dp_audio_shutdown(struct device *dev, void *data)
+{
+ struct dp_audio_private *audio;
+ struct platform_device *pdev;
+
+ pdev = to_platform_device(dev);
+ audio = dp_audio_get_data(pdev);
+ if (IS_ERR(audio)) {
+ DRM_ERROR("failed to get audio data\n");
+ return;
+ }
+
+ dp_audio_enable(audio, false);
+}
+
+static const struct hdmi_codec_ops dp_audio_codec_ops = {
+ .hw_params = dp_audio_hw_params,
+ .audio_shutdown = dp_audio_shutdown,
+ .get_eld = dp_audio_get_eld,
+};
+
+static struct hdmi_codec_pdata codec_data = {
+ .ops = &dp_audio_codec_ops,
+ .max_i2s_channels = 8,
+ .i2s = 1,
+};
+
+int dp_register_audio_driver(struct device *dev,
+ struct dp_audio *dp_audio)
+{
+ struct dp_audio_private *audio_priv;
+
+ audio_priv = container_of(dp_audio,
+ struct dp_audio_private, dp_audio);
+
+ audio_priv->audio_pdev = platform_device_register_data(dev,
+ HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data,
+ sizeof(codec_data));
+ return PTR_ERR_OR_ZERO(audio_priv->audio_pdev);
+}
+
+struct dp_audio *dp_audio_get(struct platform_device *pdev,
+ struct dp_panel *panel,
+ struct dp_catalog *catalog)
+{
+ int rc = 0;
+ struct dp_audio_private *audio;
+ struct dp_audio *dp_audio;
+
+ if (!pdev || !panel || !catalog) {
+ DRM_ERROR("invalid input\n");
+ rc = -EINVAL;
+ goto error;
+ }
+
+ audio = devm_kzalloc(&pdev->dev, sizeof(*audio), GFP_KERNEL);
+ if (!audio) {
+ rc = -ENOMEM;
+ goto error;
+ }
+
+ audio->pdev = pdev;
+ audio->panel = panel;
+ audio->catalog = catalog;
+
+ dp_audio = &audio->dp_audio;
+
+ dp_catalog_audio_init(catalog);
+
+ return dp_audio;
+error:
+ return ERR_PTR(rc);
+}
+
+void dp_audio_put(struct dp_audio *dp_audio)
+{
+ struct dp_audio_private *audio;
+
+ if (!dp_audio)
+ return;
+
+ audio = container_of(dp_audio, struct dp_audio_private, dp_audio);
+
+ devm_kfree(&audio->pdev->dev, audio);
+}
diff --git a/drivers/gpu/drm/msm/dp/dp_audio.h b/drivers/gpu/drm/msm/dp/dp_audio.h
new file mode 100644
index 000000000000..84e5f4a5d26b
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_audio.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DP_AUDIO_H_
+#define _DP_AUDIO_H_
+
+#include <linux/platform_device.h>
+
+#include "dp_panel.h"
+#include "dp_catalog.h"
+#include <sound/hdmi-codec.h>
+
+/**
+ * struct dp_audio
+ * @lane_count: number of lanes configured in current session
+ * @bw_code: link rate's bandwidth code for current session
+ */
+struct dp_audio {
+ u32 lane_count;
+ u32 bw_code;
+};
+
+/**
+ * dp_audio_get()
+ *
+ * Creates and instance of dp audio.
+ *
+ * @pdev: caller's platform device instance.
+ * @panel: an instance of dp_panel module.
+ * @catalog: an instance of dp_catalog module.
+ *
+ * Returns the error code in case of failure, otherwize
+ * an instance of newly created dp_module.
+ */
+struct dp_audio *dp_audio_get(struct platform_device *pdev,
+ struct dp_panel *panel,
+ struct dp_catalog *catalog);
+
+/**
+ * dp_register_audio_driver()
+ *
+ * Registers DP device with hdmi_codec interface.
+ *
+ * @dev: DP device instance.
+ * @dp_audio: an instance of dp_audio module.
+ *
+ *
+ * Returns the error code in case of failure, otherwise
+ * zero on success.
+ */
+int dp_register_audio_driver(struct device *dev,
+ struct dp_audio *dp_audio);
+
+/**
+ * dp_audio_put()
+ *
+ * Cleans the dp_audio instance.
+ *
+ * @dp_audio: an instance of dp_audio.
+ */
+void dp_audio_put(struct dp_audio *dp_audio);
+
+int dp_audio_hw_params(struct device *dev,
+ void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params);
+
+#endif /* _DP_AUDIO_H_ */
+
+
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 67abb90953e4..393e3d443139 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -90,6 +90,7 @@ aux_lut_value[PHY_AUX_CFG_MAX][DP_AUX_CFG_MAX_VALUE_CNT] = {
struct dp_catalog_private {
struct device *dev;
struct dp_io *io;
+ u32 (*audio_map)[DP_AUDIO_SDP_HEADER_MAX];
struct dp_catalog dp_catalog;
u8 aux_lut_cfg_index[PHY_AUX_CFG_MAX];
};
@@ -1070,3 +1071,194 @@ struct dp_catalog *dp_catalog_get(struct device *dev, struct dp_io *io)
return &catalog->dp_catalog;
}
+
+void dp_catalog_audio_get_header(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+ u32 (*sdp_map)[DP_AUDIO_SDP_HEADER_MAX];
+ enum dp_catalog_audio_sdp_type sdp;
+ enum dp_catalog_audio_header_type header;
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ sdp_map = catalog->audio_map;
+ sdp = dp_catalog->sdp_type;
+ header = dp_catalog->sdp_header;
+
+ dp_catalog->audio_data = dp_read_link(catalog,
+ sdp_map[sdp][header]);
+}
+
+void dp_catalog_audio_set_header(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+ u32 (*sdp_map)[DP_AUDIO_SDP_HEADER_MAX];
+ enum dp_catalog_audio_sdp_type sdp;
+ enum dp_catalog_audio_header_type header;
+ u32 data;
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ sdp_map = catalog->audio_map;
+ sdp = dp_catalog->sdp_type;
+ header = dp_catalog->sdp_header;
+ data = dp_catalog->audio_data;
+
+ dp_write_link(catalog, sdp_map[sdp][header], data);
+}
+
+void dp_catalog_audio_config_acr(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+ u32 acr_ctrl, select;
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ select = dp_catalog->audio_data;
+ acr_ctrl = select << 4 | BIT(31) | BIT(8) | BIT(14);
+
+ DRM_DEBUG_DP("select = 0x%x, acr_ctrl = 0x%x\n", select, acr_ctrl);
+
+ dp_write_link(catalog, MMSS_DP_AUDIO_ACR_CTRL, acr_ctrl);
+}
+
+void dp_catalog_audio_enable(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+ bool enable;
+ u32 audio_ctrl;
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ enable = !!dp_catalog->audio_data;
+ audio_ctrl = dp_read_link(catalog, MMSS_DP_AUDIO_CFG);
+
+ if (enable)
+ audio_ctrl |= BIT(0);
+ else
+ audio_ctrl &= ~BIT(0);
+
+ DRM_DEBUG_DP("dp_audio_cfg = 0x%x\n", audio_ctrl);
+
+ dp_write_link(catalog, MMSS_DP_AUDIO_CFG, audio_ctrl);
+ /* make sure audio engine is disabled */
+ wmb();
+}
+
+void dp_catalog_audio_config_sdp(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+ u32 sdp_cfg = 0;
+ u32 sdp_cfg2 = 0;
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ sdp_cfg = dp_read_link(catalog, MMSS_DP_SDP_CFG);
+ /* AUDIO_TIMESTAMP_SDP_EN */
+ sdp_cfg |= BIT(1);
+ /* AUDIO_STREAM_SDP_EN */
+ sdp_cfg |= BIT(2);
+ /* AUDIO_COPY_MANAGEMENT_SDP_EN */
+ sdp_cfg |= BIT(5);
+ /* AUDIO_ISRC_SDP_EN */
+ sdp_cfg |= BIT(6);
+ /* AUDIO_INFOFRAME_SDP_EN */
+ sdp_cfg |= BIT(20);
+
+ DRM_DEBUG_DP("sdp_cfg = 0x%x\n", sdp_cfg);
+
+ dp_write_link(catalog, MMSS_DP_SDP_CFG, sdp_cfg);
+
+ sdp_cfg2 = dp_read_link(catalog, MMSS_DP_SDP_CFG2);
+ /* IFRM_REGSRC -> Do not use reg values */
+ sdp_cfg2 &= ~BIT(0);
+ /* AUDIO_STREAM_HB3_REGSRC-> Do not use reg values */
+ sdp_cfg2 &= ~BIT(1);
+
+ DRM_DEBUG_DP("sdp_cfg2 = 0x%x\n", sdp_cfg2);
+
+ dp_write_link(catalog, MMSS_DP_SDP_CFG2, sdp_cfg2);
+}
+
+void dp_catalog_audio_init(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+
+ static u32 sdp_map[][DP_AUDIO_SDP_HEADER_MAX] = {
+ {
+ MMSS_DP_AUDIO_STREAM_0,
+ MMSS_DP_AUDIO_STREAM_1,
+ MMSS_DP_AUDIO_STREAM_1,
+ },
+ {
+ MMSS_DP_AUDIO_TIMESTAMP_0,
+ MMSS_DP_AUDIO_TIMESTAMP_1,
+ MMSS_DP_AUDIO_TIMESTAMP_1,
+ },
+ {
+ MMSS_DP_AUDIO_INFOFRAME_0,
+ MMSS_DP_AUDIO_INFOFRAME_1,
+ MMSS_DP_AUDIO_INFOFRAME_1,
+ },
+ {
+ MMSS_DP_AUDIO_COPYMANAGEMENT_0,
+ MMSS_DP_AUDIO_COPYMANAGEMENT_1,
+ MMSS_DP_AUDIO_COPYMANAGEMENT_1,
+ },
+ {
+ MMSS_DP_AUDIO_ISRC_0,
+ MMSS_DP_AUDIO_ISRC_1,
+ MMSS_DP_AUDIO_ISRC_1,
+ },
+ };
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ catalog->audio_map = sdp_map;
+}
+
+void dp_catalog_audio_sfe_level(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog;
+ u32 mainlink_levels, safe_to_exit_level;
+
+ if (!dp_catalog)
+ return;
+
+ catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ safe_to_exit_level = dp_catalog->audio_data;
+ mainlink_levels = dp_read_link(catalog, REG_DP_MAINLINK_LEVELS);
+ mainlink_levels &= 0xFE0;
+ mainlink_levels |= safe_to_exit_level;
+
+ DRM_DEBUG_DP("mainlink_level = 0x%x, safe_to_exit_level = 0x%x\n",
+ mainlink_levels, safe_to_exit_level);
+
+ dp_write_link(catalog, REG_DP_MAINLINK_LEVELS, mainlink_levels);
+}
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 35c90b248b5d..edb68a65b0fa 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -42,12 +42,31 @@ enum dp_phy_aux_config_type {
PHY_AUX_CFG_MAX,
};
+enum dp_catalog_audio_sdp_type {
+ DP_AUDIO_SDP_STREAM,
+ DP_AUDIO_SDP_TIMESTAMP,
+ DP_AUDIO_SDP_INFOFRAME,
+ DP_AUDIO_SDP_COPYMANAGEMENT,
+ DP_AUDIO_SDP_ISRC,
+ DP_AUDIO_SDP_MAX,
+};
+
+enum dp_catalog_audio_header_type {
+ DP_AUDIO_SDP_HEADER_1,
+ DP_AUDIO_SDP_HEADER_2,
+ DP_AUDIO_SDP_HEADER_3,
+ DP_AUDIO_SDP_HEADER_MAX,
+};
+
struct dp_catalog {
u32 aux_data;
u32 total;
u32 sync_start;
u32 width_blanking;
u32 dp_active;
+ enum dp_catalog_audio_sdp_type sdp_type;
+ enum dp_catalog_audio_header_type sdp_header;
+ u32 audio_data;
};
/* AUX APIs */
@@ -102,4 +121,14 @@ void dp_catalog_panel_tpg_disable(struct dp_catalog *dp_catalog);
struct dp_catalog *dp_catalog_get(struct device *dev, struct dp_io *io);
+/* DP Audio APIs */
+void dp_catalog_audio_get_header(struct dp_catalog *catalog);
+void dp_catalog_audio_set_header(struct dp_catalog *catalog);
+void dp_catalog_audio_config_acr(struct dp_catalog *catalog);
+void dp_catalog_audio_enable(struct dp_catalog *catalog);
+void dp_catalog_audio_enable(struct dp_catalog *catalog);
+void dp_catalog_audio_config_sdp(struct dp_catalog *catalog);
+void dp_catalog_audio_init(struct dp_catalog *catalog);
+void dp_catalog_audio_sfe_level(struct dp_catalog *catalog);
+
#endif /* _DP_CATALOG_H_ */
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 5e779e29c3da..7cf25e151ded 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -25,6 +25,7 @@
#include "dp_display.h"
#include "dp_drm.h"
#include "dp_pll.h"
+#include "dp_audio.h"
static struct msm_dp *g_dp_display;
#define HPD_STRING_SIZE 30
@@ -105,6 +106,8 @@ struct dp_display_private {
u32 event_gndx;
struct dp_event event_list[DP_EVENT_Q_MAX];
spinlock_t event_lock;
+
+ struct dp_audio *audio;
};
static const struct of_device_id dp_dt_match[] = {
@@ -204,6 +207,13 @@ static int dp_display_bind(struct device *dev, struct device *master,
DRM_ERROR("Power client create failed\n");
goto end;
}
+
+ rc = dp_register_audio_driver(dev, dp->audio);
+ if (rc) {
+ DRM_ERROR("Audio registration Dp failed\n");
+ goto end;
+ }
+
end:
return rc;
}
@@ -376,8 +386,19 @@ static int dp_display_usbpd_disconnect_cb(struct device *dev)
int rc = 0;
struct dp_display_private *dp;
+ if (!dev) {
+ DRM_ERROR("invalid dev\n");
+ rc = -EINVAL;
+ return rc;
+ }
+
dp = container_of(g_dp_display,
struct dp_display_private, dp_display);
+ if (!dp) {
+ DRM_ERROR("no driver data found\n");
+ rc = -ENODEV;
+ return rc;
+ }
dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
@@ -608,6 +629,7 @@ static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
dp_panel_put(dp->panel);
dp_aux_put(dp->aux);
dp_pll_put(dp->pll);
+ dp_audio_put(dp->audio);
}
static int dp_init_sub_modules(struct dp_display_private *dp)
@@ -707,7 +729,18 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
goto error_ctrl;
}
+ dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
+ if (IS_ERR(dp->audio)) {
+ rc = PTR_ERR(dp->audio);
+ pr_err("failed to initialize audio, rc = %d\n", rc);
+ dp->audio = NULL;
+ goto error_audio;
+ }
+
return rc;
+
+error_audio:
+ dp_ctrl_put(dp->ctrl);
error_ctrl:
dp_panel_put(dp->panel);
error_link:
@@ -753,6 +786,18 @@ static int dp_display_enable(struct dp_display_private *dp, u32 data)
static int dp_display_post_enable(struct msm_dp *dp_display)
{
+ struct dp_display_private *dp;
+ u32 rate;
+
+ dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+ rate = dp->link->link_params.rate;
+
+ if (dp->audio_supported) {
+ dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
+ dp->audio->lane_count = dp->link->link_params.num_lanes;
+ }
+
return 0;
}
@@ -1060,6 +1105,9 @@ static int dp_display_probe(struct platform_device *pdev)
g_dp_display = &dp->dp_display;
+ /* Store DP audio handle inside DP display */
+ g_dp_display->dp_audio = dp->audio;
+
platform_set_drvdata(pdev, g_dp_display);
rc = component_add(&pdev->dev, &dp_display_comp_ops);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 2f2d1279dfc6..1e0d2b9d9a2a 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -14,7 +14,9 @@ struct msm_dp {
struct drm_encoder *encoder;
bool is_connected;
u32 max_pclk_khz;
+
u32 max_dp_lanes;
+ struct dp_audio *dp_audio;
};
int dp_display_validate_mode(struct msm_dp *dp_display, u32 mode_pclk_khz);
--
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