From: Stefan Mavrodiev <stefan@olimex.com>
To: Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vkoul@kernel.org>, Maxime Ripard <mripard@kernel.org>,
Chen-Yu Tsai <wens@csie.org>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org (open list),
dmaengine@vger.kernel.org (open list:DMA GENERIC OFFLOAD ENGINE
SUBSYSTEM),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Allwinner sunXi SoC support),
dri-devel@lists.freedesktop.org (open list:DRM DRIVERS FOR
ALLWINNER A10)
Cc: linux-sunxi@googlegroups.com, Stefan Mavrodiev <stefan@olimex.com>
Subject: [PATCH 2/2] drm: sun4i: hdmi: Add support for sun4i HDMI encoder audio
Date: Fri, 10 Jan 2020 16:11:40 +0200 [thread overview]
Message-ID: <20200110141140.28527-3-stefan@olimex.com> (raw)
In-Reply-To: <20200110141140.28527-1-stefan@olimex.com>
Add HDMI audio support for the sun4i-hdmi encoder, used on
the older Allwinner chips - A10, A20, A31.
Most of the code is based on the BSP implementation. In it
dditional formats are supported (S20_3LE and S24_LE), however
there where some problems with them and only S16_LE is left.
Signed-off-by: Stefan Mavrodiev <stefan@olimex.com>
---
drivers/gpu/drm/sun4i/Kconfig | 1 +
drivers/gpu/drm/sun4i/Makefile | 1 +
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 30 ++
drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c | 375 +++++++++++++++++++++++
drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 4 +
5 files changed, 411 insertions(+)
create mode 100644 drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 37e90e42943f..192b732b10cd 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -19,6 +19,7 @@ if DRM_SUN4I
config DRM_SUN4I_HDMI
tristate "Allwinner A10 HDMI Controller Support"
default DRM_SUN4I
+ select SND_PCM_ELD
help
Choose this option if you have an Allwinner SoC with an HDMI
controller.
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 0d04f2447b01..e2d82b451c36 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -5,6 +5,7 @@ sun4i-frontend-y += sun4i_frontend.o
sun4i-drm-y += sun4i_drv.o
sun4i-drm-y += sun4i_framebuffer.o
+sun4i-drm-hdmi-y += sun4i_hdmi_audio.o
sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o
sun4i-drm-hdmi-y += sun4i_hdmi_enc.o
sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index 7ad3f06c127e..456964e681b0 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -42,7 +42,32 @@
#define SUN4I_HDMI_VID_TIMING_POL_VSYNC BIT(1)
#define SUN4I_HDMI_VID_TIMING_POL_HSYNC BIT(0)
+#define SUN4I_HDMI_AUDIO_CTRL_REG 0x040
+#define SUN4I_HDMI_AUDIO_CTRL_ENABLE BIT(31)
+#define SUN4I_HDMI_AUDIO_CTRL_RESET BIT(30)
+
+#define SUN4I_HDMI_AUDIO_FMT_REG 0x048
+#define SUN4I_HDMI_AUDIO_FMT_SRC BIT(31)
+#define SUN4I_HDMI_AUDIO_FMT_LAYOUT BIT(3)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG(n) (n - 1)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK GENMASK(2, 0)
+
+#define SUN4I_HDMI_AUDIO_PCM_REG 0x4c
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP(n, m) ((m - 1) << (n * 4))
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(n) (GENMASK(2, 0) << (n * 4))
+
+#define SUN4I_HDMI_AUDIO_CTS_REG 0x050
+#define SUN4I_HDMI_AUDIO_CTS(n) (n & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_N_REG 0x054
+#define SUN4I_HDMI_AUDIO_N(n) (n & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_STAT0_REG 0x58
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ(n) (n << 24)
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK GENMASK(27, 24)
+
#define SUN4I_HDMI_AVI_INFOFRAME_REG(n) (0x080 + (n))
+#define SUN4I_HDMI_AUDIO_INFOFRAME_REG(n) (0x0a0 + (n))
#define SUN4I_HDMI_PAD_CTRL0_REG 0x200
#define SUN4I_HDMI_PAD_CTRL0_BIASEN BIT(31)
@@ -283,9 +308,13 @@ struct sun4i_hdmi {
struct regmap_field *field_ddc_sda_en;
struct regmap_field *field_ddc_sck_en;
+ u8 hdmi_audio_channels;
+
struct sun4i_drv *drv;
bool hdmi_monitor;
+ bool hdmi_audio;
+
struct cec_adapter *cec_adap;
const struct sun4i_hdmi_variant *variant;
@@ -294,5 +323,6 @@ struct sun4i_hdmi {
int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi);
+int sun4i_hdmi_audio_create(struct sun4i_hdmi *hdmi);
#endif /* _SUN4I_HDMI_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
new file mode 100644
index 000000000000..b6d4199d15ce
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Olimex Ltd.
+ * Author: Stefan Mavrodiev <stefan@olimex.com>
+ */
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_dma.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_print.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "sun4i_hdmi.h"
+
+static const struct snd_soc_dapm_widget sun4i_hdmi_audio_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route sun4i_hdmi_audio_routes[] = {
+ { "TX", NULL, "Playback" },
+};
+
+static const struct snd_soc_component_driver sun4i_hdmi_audio_component = {
+ .dapm_widgets = sun4i_hdmi_audio_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(sun4i_hdmi_audio_widgets),
+ .dapm_routes = sun4i_hdmi_audio_routes,
+ .num_dapm_routes = ARRAY_SIZE(sun4i_hdmi_audio_routes),
+};
+
+static int sun4i_hdmi_audio_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ u32 reg;
+ int ret;
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_RESET);
+ ret = regmap_read_poll_timeout(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ reg, !reg, 100, 50000);
+ if (ret < 0) {
+ DRM_ERROR("Failed to reset HDMI Audio\n");
+ return ret;
+ }
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_ENABLE);
+
+ return snd_pcm_hw_constraint_eld(substream->runtime,
+ hdmi->connector.eld);
+}
+
+static void sun4i_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+}
+
+static int sun4i_hdmi_setup_audio_infoframes(struct sun4i_hdmi *hdmi)
+{
+ union hdmi_infoframe frame;
+ u8 buffer[14];
+ int i, ret;
+
+ ret = hdmi_audio_infoframe_init(&frame.audio);
+ if (ret < 0) {
+ DRM_ERROR("Failed to init HDMI audio infoframe\n");
+ return ret;
+ }
+
+ frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
+ frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
+ frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
+ frame.audio.channels = hdmi->hdmi_audio_channels;
+
+ ret = hdmi_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("Failed to pack HDMI audio infoframe\n");
+ return ret;
+ }
+
+ for (i = 0; i < sizeof(buffer); i++)
+ writeb(buffer[i],
+ hdmi->base + SUN4I_HDMI_AUDIO_INFOFRAME_REG(i));
+
+ return 0;
+}
+
+static void sun4i_hdmi_audio_set_cts_n(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ struct drm_encoder *encoder = &hdmi->encoder;
+ struct drm_crtc *crtc = encoder->crtc;
+ const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ u32 rate = params_rate(params);
+ u32 n, cts;
+ u64 tmp;
+
+ /**
+ * Calculate Cycle Time Stamp (CTS) and Numerator (N):
+ *
+ * N = 128 * Samplerate / 1000
+ * CTS = (Ftdms * N) / (128 * Samplerate)
+ */
+
+ n = 128 * rate / 1000;
+ tmp = (u64)(mode->clock * 1000) * n;
+ do_div(tmp, 128 * rate);
+ cts = tmp;
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTS_REG,
+ SUN4I_HDMI_AUDIO_CTS(cts));
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_N_REG,
+ SUN4I_HDMI_AUDIO_N(n));
+}
+
+static int sun4i_hdmi_audio_set_hw_rate(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ u32 rate = params_rate(params);
+ u32 val;
+
+ switch (rate) {
+ case 44100:
+ val = 0x0;
+ break;
+ case 48000:
+ val = 0x2;
+ break;
+ case 32000:
+ val = 0x3;
+ break;
+ case 88200:
+ val = 0x8;
+ break;
+ case 96000:
+ val = 0x9;
+ break;
+ case 176400:
+ val = 0xc;
+ break;
+ case 192000:
+ val = 0xe;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_STAT0_REG,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ(val));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_set_hw_channels(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ u32 channels = params_channels(params);
+
+ if (channels > 8)
+ return -EINVAL;
+
+ hdmi->hdmi_audio_channels = channels;
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_LAYOUT,
+ (channels > 2) ? SUN4I_HDMI_AUDIO_FMT_LAYOUT : 0);
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG(channels));
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_PCM_REG, 0x76543210);
+
+ /**
+ * If only one channel is required, send the same sample
+ * to the sink device as a left and right channel.
+ */
+ if (channels == 1)
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_PCM_REG,
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(1),
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP(1, 1));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = sun4i_hdmi_audio_set_hw_rate(hdmi, params);
+ if (ret)
+ return ret;
+
+ ret = sun4i_hdmi_audio_set_hw_channels(hdmi, params);
+ if (ret)
+ return ret;
+
+ sun4i_hdmi_audio_set_cts_n(hdmi, params);
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_trigger(struct snd_pcm_substream *substream,
+ int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ ret = sun4i_hdmi_setup_audio_infoframes(hdmi);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const struct snd_soc_dai_ops sun4i_hdmi_audio_dai_ops = {
+ .startup = sun4i_hdmi_audio_startup,
+ .shutdown = sun4i_hdmi_audio_shutdown,
+ .hw_params = sun4i_hdmi_audio_hw_params,
+ .trigger = sun4i_hdmi_audio_trigger,
+};
+
+static int sun4i_hdmi_audio_dai_probe(struct snd_soc_dai *dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ dma_data = devm_kzalloc(dai->dev, sizeof(*dma_data), GFP_KERNEL);
+ if (!dma_data)
+ return -ENOMEM;
+
+ dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_data->maxburst = 8;
+
+ snd_soc_dai_init_dma_data(dai, dma_data, NULL);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver sun4i_hdmi_audio_dai = {
+ .name = "HDMI",
+ .ops = &sun4i_hdmi_audio_dai_ops,
+ .probe = sun4i_hdmi_audio_dai_probe,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ },
+};
+
+static const struct snd_pcm_hardware sun4i_hdmi_audio_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = 128 * 1024,
+ .period_bytes_min = 4 * 1024,
+ .period_bytes_max = 32 * 1024,
+ .periods_min = 2,
+ .periods_max = 8,
+ .fifo_size = 128,
+};
+
+static const struct snd_dmaengine_pcm_config sun4i_hdmi_audio_pcm_config = {
+ .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-tx",
+ .pcm_hardware = &sun4i_hdmi_audio_pcm_hardware,
+ .prealloc_buffer_size = 128 * 1024,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+struct snd_soc_card sun4i_hdmi_audio_card = {
+ .name = "sun4i-hdmi",
+};
+
+int sun4i_hdmi_audio_create(struct sun4i_hdmi *hdmi)
+{
+ struct snd_soc_card *card = &sun4i_hdmi_audio_card;
+ struct snd_soc_dai_link_component *comp;
+ struct snd_soc_dai_link *link;
+ int ret;
+
+ ret = devm_snd_dmaengine_pcm_register(hdmi->dev,
+ &sun4i_hdmi_audio_pcm_config, 0);
+ if (ret) {
+ DRM_ERROR("Could not register PCM\n");
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(hdmi->dev,
+ &sun4i_hdmi_audio_component,
+ &sun4i_hdmi_audio_dai, 1);
+ if (ret) {
+ DRM_ERROR("Could not register DAI\n");
+ return ret;
+ }
+
+ link = devm_kzalloc(hdmi->dev, sizeof(*link), GFP_KERNEL);
+ if (!link)
+ return -ENOMEM;
+
+ comp = devm_kzalloc(hdmi->dev, sizeof(*comp) * 3, GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ link->cpus = &comp[0];
+ link->codecs = &comp[1];
+ link->platforms = &comp[2];
+
+ link->num_cpus = 1;
+ link->num_codecs = 1;
+ link->num_platforms = 1;
+
+ link->playback_only = 1;
+
+ link->name = "SUN4I-HDMI";
+ link->stream_name = "SUN4I-HDMI PCM";
+
+ link->codecs->name = dev_name(hdmi->dev);
+ link->codecs->dai_name = sun4i_hdmi_audio_dai.name;
+
+ link->cpus->dai_name = dev_name(hdmi->dev);
+
+ link->platforms->name = dev_name(hdmi->dev);
+
+ link->dai_fmt = SND_SOC_DAIFMT_I2S;
+
+ card->dai_link = link;
+ card->num_links = 1;
+ card->dev = hdmi->dev;
+
+ snd_soc_card_set_drvdata(card, hdmi);
+ return devm_snd_soc_register_card(hdmi->dev, card);
+}
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index a7c4654445c7..79ecd89fb705 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -114,6 +114,9 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder)
val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+
+ if (hdmi->hdmi_audio && sun4i_hdmi_audio_create(hdmi))
+ DRM_ERROR("Couldn't create the HDMI audio adapter\n");
}
static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
@@ -218,6 +221,7 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector)
if (!edid)
return 0;
+ hdmi->hdmi_audio = drm_detect_monitor_audio(edid);
hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
--
2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Mavrodiev <stefan@olimex.com>
To: Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vkoul@kernel.org>, Maxime Ripard <mripard@kernel.org>,
Chen-Yu Tsai <wens@csie.org>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org (open list),
dmaengine@vger.kernel.org (open list:DMA GENERIC OFFLOAD ENGINE
SUBSYSTEM),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Allwinner sunXi SoC support),
dri-devel@lists.freedesktop.org (open list:DRM DRIVERS FOR
ALLWINNER A10)
Cc: linux-sunxi@googlegroups.com, Stefan Mavrodiev <stefan@olimex.com>
Subject: [PATCH 2/2] drm: sun4i: hdmi: Add support for sun4i HDMI encoder audio
Date: Fri, 10 Jan 2020 16:11:40 +0200 [thread overview]
Message-ID: <20200110141140.28527-3-stefan@olimex.com> (raw)
In-Reply-To: <20200110141140.28527-1-stefan@olimex.com>
Add HDMI audio support for the sun4i-hdmi encoder, used on
the older Allwinner chips - A10, A20, A31.
Most of the code is based on the BSP implementation. In it
dditional formats are supported (S20_3LE and S24_LE), however
there where some problems with them and only S16_LE is left.
Signed-off-by: Stefan Mavrodiev <stefan@olimex.com>
---
drivers/gpu/drm/sun4i/Kconfig | 1 +
drivers/gpu/drm/sun4i/Makefile | 1 +
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 30 ++
drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c | 375 +++++++++++++++++++++++
drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 4 +
5 files changed, 411 insertions(+)
create mode 100644 drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 37e90e42943f..192b732b10cd 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -19,6 +19,7 @@ if DRM_SUN4I
config DRM_SUN4I_HDMI
tristate "Allwinner A10 HDMI Controller Support"
default DRM_SUN4I
+ select SND_PCM_ELD
help
Choose this option if you have an Allwinner SoC with an HDMI
controller.
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 0d04f2447b01..e2d82b451c36 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -5,6 +5,7 @@ sun4i-frontend-y += sun4i_frontend.o
sun4i-drm-y += sun4i_drv.o
sun4i-drm-y += sun4i_framebuffer.o
+sun4i-drm-hdmi-y += sun4i_hdmi_audio.o
sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o
sun4i-drm-hdmi-y += sun4i_hdmi_enc.o
sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index 7ad3f06c127e..456964e681b0 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -42,7 +42,32 @@
#define SUN4I_HDMI_VID_TIMING_POL_VSYNC BIT(1)
#define SUN4I_HDMI_VID_TIMING_POL_HSYNC BIT(0)
+#define SUN4I_HDMI_AUDIO_CTRL_REG 0x040
+#define SUN4I_HDMI_AUDIO_CTRL_ENABLE BIT(31)
+#define SUN4I_HDMI_AUDIO_CTRL_RESET BIT(30)
+
+#define SUN4I_HDMI_AUDIO_FMT_REG 0x048
+#define SUN4I_HDMI_AUDIO_FMT_SRC BIT(31)
+#define SUN4I_HDMI_AUDIO_FMT_LAYOUT BIT(3)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG(n) (n - 1)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK GENMASK(2, 0)
+
+#define SUN4I_HDMI_AUDIO_PCM_REG 0x4c
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP(n, m) ((m - 1) << (n * 4))
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(n) (GENMASK(2, 0) << (n * 4))
+
+#define SUN4I_HDMI_AUDIO_CTS_REG 0x050
+#define SUN4I_HDMI_AUDIO_CTS(n) (n & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_N_REG 0x054
+#define SUN4I_HDMI_AUDIO_N(n) (n & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_STAT0_REG 0x58
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ(n) (n << 24)
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK GENMASK(27, 24)
+
#define SUN4I_HDMI_AVI_INFOFRAME_REG(n) (0x080 + (n))
+#define SUN4I_HDMI_AUDIO_INFOFRAME_REG(n) (0x0a0 + (n))
#define SUN4I_HDMI_PAD_CTRL0_REG 0x200
#define SUN4I_HDMI_PAD_CTRL0_BIASEN BIT(31)
@@ -283,9 +308,13 @@ struct sun4i_hdmi {
struct regmap_field *field_ddc_sda_en;
struct regmap_field *field_ddc_sck_en;
+ u8 hdmi_audio_channels;
+
struct sun4i_drv *drv;
bool hdmi_monitor;
+ bool hdmi_audio;
+
struct cec_adapter *cec_adap;
const struct sun4i_hdmi_variant *variant;
@@ -294,5 +323,6 @@ struct sun4i_hdmi {
int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi);
+int sun4i_hdmi_audio_create(struct sun4i_hdmi *hdmi);
#endif /* _SUN4I_HDMI_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
new file mode 100644
index 000000000000..b6d4199d15ce
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Olimex Ltd.
+ * Author: Stefan Mavrodiev <stefan@olimex.com>
+ */
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_dma.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_print.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "sun4i_hdmi.h"
+
+static const struct snd_soc_dapm_widget sun4i_hdmi_audio_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route sun4i_hdmi_audio_routes[] = {
+ { "TX", NULL, "Playback" },
+};
+
+static const struct snd_soc_component_driver sun4i_hdmi_audio_component = {
+ .dapm_widgets = sun4i_hdmi_audio_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(sun4i_hdmi_audio_widgets),
+ .dapm_routes = sun4i_hdmi_audio_routes,
+ .num_dapm_routes = ARRAY_SIZE(sun4i_hdmi_audio_routes),
+};
+
+static int sun4i_hdmi_audio_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ u32 reg;
+ int ret;
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_RESET);
+ ret = regmap_read_poll_timeout(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ reg, !reg, 100, 50000);
+ if (ret < 0) {
+ DRM_ERROR("Failed to reset HDMI Audio\n");
+ return ret;
+ }
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_ENABLE);
+
+ return snd_pcm_hw_constraint_eld(substream->runtime,
+ hdmi->connector.eld);
+}
+
+static void sun4i_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+}
+
+static int sun4i_hdmi_setup_audio_infoframes(struct sun4i_hdmi *hdmi)
+{
+ union hdmi_infoframe frame;
+ u8 buffer[14];
+ int i, ret;
+
+ ret = hdmi_audio_infoframe_init(&frame.audio);
+ if (ret < 0) {
+ DRM_ERROR("Failed to init HDMI audio infoframe\n");
+ return ret;
+ }
+
+ frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
+ frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
+ frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
+ frame.audio.channels = hdmi->hdmi_audio_channels;
+
+ ret = hdmi_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("Failed to pack HDMI audio infoframe\n");
+ return ret;
+ }
+
+ for (i = 0; i < sizeof(buffer); i++)
+ writeb(buffer[i],
+ hdmi->base + SUN4I_HDMI_AUDIO_INFOFRAME_REG(i));
+
+ return 0;
+}
+
+static void sun4i_hdmi_audio_set_cts_n(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ struct drm_encoder *encoder = &hdmi->encoder;
+ struct drm_crtc *crtc = encoder->crtc;
+ const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ u32 rate = params_rate(params);
+ u32 n, cts;
+ u64 tmp;
+
+ /**
+ * Calculate Cycle Time Stamp (CTS) and Numerator (N):
+ *
+ * N = 128 * Samplerate / 1000
+ * CTS = (Ftdms * N) / (128 * Samplerate)
+ */
+
+ n = 128 * rate / 1000;
+ tmp = (u64)(mode->clock * 1000) * n;
+ do_div(tmp, 128 * rate);
+ cts = tmp;
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTS_REG,
+ SUN4I_HDMI_AUDIO_CTS(cts));
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_N_REG,
+ SUN4I_HDMI_AUDIO_N(n));
+}
+
+static int sun4i_hdmi_audio_set_hw_rate(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ u32 rate = params_rate(params);
+ u32 val;
+
+ switch (rate) {
+ case 44100:
+ val = 0x0;
+ break;
+ case 48000:
+ val = 0x2;
+ break;
+ case 32000:
+ val = 0x3;
+ break;
+ case 88200:
+ val = 0x8;
+ break;
+ case 96000:
+ val = 0x9;
+ break;
+ case 176400:
+ val = 0xc;
+ break;
+ case 192000:
+ val = 0xe;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_STAT0_REG,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ(val));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_set_hw_channels(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ u32 channels = params_channels(params);
+
+ if (channels > 8)
+ return -EINVAL;
+
+ hdmi->hdmi_audio_channels = channels;
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_LAYOUT,
+ (channels > 2) ? SUN4I_HDMI_AUDIO_FMT_LAYOUT : 0);
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG(channels));
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_PCM_REG, 0x76543210);
+
+ /**
+ * If only one channel is required, send the same sample
+ * to the sink device as a left and right channel.
+ */
+ if (channels == 1)
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_PCM_REG,
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(1),
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP(1, 1));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = sun4i_hdmi_audio_set_hw_rate(hdmi, params);
+ if (ret)
+ return ret;
+
+ ret = sun4i_hdmi_audio_set_hw_channels(hdmi, params);
+ if (ret)
+ return ret;
+
+ sun4i_hdmi_audio_set_cts_n(hdmi, params);
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_trigger(struct snd_pcm_substream *substream,
+ int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ ret = sun4i_hdmi_setup_audio_infoframes(hdmi);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const struct snd_soc_dai_ops sun4i_hdmi_audio_dai_ops = {
+ .startup = sun4i_hdmi_audio_startup,
+ .shutdown = sun4i_hdmi_audio_shutdown,
+ .hw_params = sun4i_hdmi_audio_hw_params,
+ .trigger = sun4i_hdmi_audio_trigger,
+};
+
+static int sun4i_hdmi_audio_dai_probe(struct snd_soc_dai *dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ dma_data = devm_kzalloc(dai->dev, sizeof(*dma_data), GFP_KERNEL);
+ if (!dma_data)
+ return -ENOMEM;
+
+ dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_data->maxburst = 8;
+
+ snd_soc_dai_init_dma_data(dai, dma_data, NULL);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver sun4i_hdmi_audio_dai = {
+ .name = "HDMI",
+ .ops = &sun4i_hdmi_audio_dai_ops,
+ .probe = sun4i_hdmi_audio_dai_probe,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ },
+};
+
+static const struct snd_pcm_hardware sun4i_hdmi_audio_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = 128 * 1024,
+ .period_bytes_min = 4 * 1024,
+ .period_bytes_max = 32 * 1024,
+ .periods_min = 2,
+ .periods_max = 8,
+ .fifo_size = 128,
+};
+
+static const struct snd_dmaengine_pcm_config sun4i_hdmi_audio_pcm_config = {
+ .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-tx",
+ .pcm_hardware = &sun4i_hdmi_audio_pcm_hardware,
+ .prealloc_buffer_size = 128 * 1024,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+struct snd_soc_card sun4i_hdmi_audio_card = {
+ .name = "sun4i-hdmi",
+};
+
+int sun4i_hdmi_audio_create(struct sun4i_hdmi *hdmi)
+{
+ struct snd_soc_card *card = &sun4i_hdmi_audio_card;
+ struct snd_soc_dai_link_component *comp;
+ struct snd_soc_dai_link *link;
+ int ret;
+
+ ret = devm_snd_dmaengine_pcm_register(hdmi->dev,
+ &sun4i_hdmi_audio_pcm_config, 0);
+ if (ret) {
+ DRM_ERROR("Could not register PCM\n");
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(hdmi->dev,
+ &sun4i_hdmi_audio_component,
+ &sun4i_hdmi_audio_dai, 1);
+ if (ret) {
+ DRM_ERROR("Could not register DAI\n");
+ return ret;
+ }
+
+ link = devm_kzalloc(hdmi->dev, sizeof(*link), GFP_KERNEL);
+ if (!link)
+ return -ENOMEM;
+
+ comp = devm_kzalloc(hdmi->dev, sizeof(*comp) * 3, GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ link->cpus = &comp[0];
+ link->codecs = &comp[1];
+ link->platforms = &comp[2];
+
+ link->num_cpus = 1;
+ link->num_codecs = 1;
+ link->num_platforms = 1;
+
+ link->playback_only = 1;
+
+ link->name = "SUN4I-HDMI";
+ link->stream_name = "SUN4I-HDMI PCM";
+
+ link->codecs->name = dev_name(hdmi->dev);
+ link->codecs->dai_name = sun4i_hdmi_audio_dai.name;
+
+ link->cpus->dai_name = dev_name(hdmi->dev);
+
+ link->platforms->name = dev_name(hdmi->dev);
+
+ link->dai_fmt = SND_SOC_DAIFMT_I2S;
+
+ card->dai_link = link;
+ card->num_links = 1;
+ card->dev = hdmi->dev;
+
+ snd_soc_card_set_drvdata(card, hdmi);
+ return devm_snd_soc_register_card(hdmi->dev, card);
+}
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index a7c4654445c7..79ecd89fb705 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -114,6 +114,9 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder)
val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+
+ if (hdmi->hdmi_audio && sun4i_hdmi_audio_create(hdmi))
+ DRM_ERROR("Couldn't create the HDMI audio adapter\n");
}
static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
@@ -218,6 +221,7 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector)
if (!edid)
return 0;
+ hdmi->hdmi_audio = drm_detect_monitor_audio(edid);
hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Mavrodiev <stefan@olimex.com>
To: Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vkoul@kernel.org>, Maxime Ripard <mripard@kernel.org>,
Chen-Yu Tsai <wens@csie.org>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org (open list),
dmaengine@vger.kernel.org (open list:DMA GENERIC OFFLOAD ENGINE
SUBSYSTEM),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Allwinner sunXi SoC support),
dri-devel@lists.freedesktop.org (open list:DRM DRIVERS FOR
ALLWINNER A10)
Cc: linux-sunxi@googlegroups.com, Stefan Mavrodiev <stefan@olimex.com>
Subject: [PATCH 2/2] drm: sun4i: hdmi: Add support for sun4i HDMI encoder audio
Date: Fri, 10 Jan 2020 16:11:40 +0200 [thread overview]
Message-ID: <20200110141140.28527-3-stefan@olimex.com> (raw)
In-Reply-To: <20200110141140.28527-1-stefan@olimex.com>
Add HDMI audio support for the sun4i-hdmi encoder, used on
the older Allwinner chips - A10, A20, A31.
Most of the code is based on the BSP implementation. In it
dditional formats are supported (S20_3LE and S24_LE), however
there where some problems with them and only S16_LE is left.
Signed-off-by: Stefan Mavrodiev <stefan@olimex.com>
---
drivers/gpu/drm/sun4i/Kconfig | 1 +
drivers/gpu/drm/sun4i/Makefile | 1 +
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 30 ++
drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c | 375 +++++++++++++++++++++++
drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 4 +
5 files changed, 411 insertions(+)
create mode 100644 drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 37e90e42943f..192b732b10cd 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -19,6 +19,7 @@ if DRM_SUN4I
config DRM_SUN4I_HDMI
tristate "Allwinner A10 HDMI Controller Support"
default DRM_SUN4I
+ select SND_PCM_ELD
help
Choose this option if you have an Allwinner SoC with an HDMI
controller.
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 0d04f2447b01..e2d82b451c36 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -5,6 +5,7 @@ sun4i-frontend-y += sun4i_frontend.o
sun4i-drm-y += sun4i_drv.o
sun4i-drm-y += sun4i_framebuffer.o
+sun4i-drm-hdmi-y += sun4i_hdmi_audio.o
sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o
sun4i-drm-hdmi-y += sun4i_hdmi_enc.o
sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index 7ad3f06c127e..456964e681b0 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -42,7 +42,32 @@
#define SUN4I_HDMI_VID_TIMING_POL_VSYNC BIT(1)
#define SUN4I_HDMI_VID_TIMING_POL_HSYNC BIT(0)
+#define SUN4I_HDMI_AUDIO_CTRL_REG 0x040
+#define SUN4I_HDMI_AUDIO_CTRL_ENABLE BIT(31)
+#define SUN4I_HDMI_AUDIO_CTRL_RESET BIT(30)
+
+#define SUN4I_HDMI_AUDIO_FMT_REG 0x048
+#define SUN4I_HDMI_AUDIO_FMT_SRC BIT(31)
+#define SUN4I_HDMI_AUDIO_FMT_LAYOUT BIT(3)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG(n) (n - 1)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK GENMASK(2, 0)
+
+#define SUN4I_HDMI_AUDIO_PCM_REG 0x4c
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP(n, m) ((m - 1) << (n * 4))
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(n) (GENMASK(2, 0) << (n * 4))
+
+#define SUN4I_HDMI_AUDIO_CTS_REG 0x050
+#define SUN4I_HDMI_AUDIO_CTS(n) (n & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_N_REG 0x054
+#define SUN4I_HDMI_AUDIO_N(n) (n & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_STAT0_REG 0x58
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ(n) (n << 24)
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK GENMASK(27, 24)
+
#define SUN4I_HDMI_AVI_INFOFRAME_REG(n) (0x080 + (n))
+#define SUN4I_HDMI_AUDIO_INFOFRAME_REG(n) (0x0a0 + (n))
#define SUN4I_HDMI_PAD_CTRL0_REG 0x200
#define SUN4I_HDMI_PAD_CTRL0_BIASEN BIT(31)
@@ -283,9 +308,13 @@ struct sun4i_hdmi {
struct regmap_field *field_ddc_sda_en;
struct regmap_field *field_ddc_sck_en;
+ u8 hdmi_audio_channels;
+
struct sun4i_drv *drv;
bool hdmi_monitor;
+ bool hdmi_audio;
+
struct cec_adapter *cec_adap;
const struct sun4i_hdmi_variant *variant;
@@ -294,5 +323,6 @@ struct sun4i_hdmi {
int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi);
+int sun4i_hdmi_audio_create(struct sun4i_hdmi *hdmi);
#endif /* _SUN4I_HDMI_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
new file mode 100644
index 000000000000..b6d4199d15ce
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Olimex Ltd.
+ * Author: Stefan Mavrodiev <stefan@olimex.com>
+ */
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_dma.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_print.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "sun4i_hdmi.h"
+
+static const struct snd_soc_dapm_widget sun4i_hdmi_audio_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route sun4i_hdmi_audio_routes[] = {
+ { "TX", NULL, "Playback" },
+};
+
+static const struct snd_soc_component_driver sun4i_hdmi_audio_component = {
+ .dapm_widgets = sun4i_hdmi_audio_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(sun4i_hdmi_audio_widgets),
+ .dapm_routes = sun4i_hdmi_audio_routes,
+ .num_dapm_routes = ARRAY_SIZE(sun4i_hdmi_audio_routes),
+};
+
+static int sun4i_hdmi_audio_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ u32 reg;
+ int ret;
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_RESET);
+ ret = regmap_read_poll_timeout(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ reg, !reg, 100, 50000);
+ if (ret < 0) {
+ DRM_ERROR("Failed to reset HDMI Audio\n");
+ return ret;
+ }
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_ENABLE);
+
+ return snd_pcm_hw_constraint_eld(substream->runtime,
+ hdmi->connector.eld);
+}
+
+static void sun4i_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+}
+
+static int sun4i_hdmi_setup_audio_infoframes(struct sun4i_hdmi *hdmi)
+{
+ union hdmi_infoframe frame;
+ u8 buffer[14];
+ int i, ret;
+
+ ret = hdmi_audio_infoframe_init(&frame.audio);
+ if (ret < 0) {
+ DRM_ERROR("Failed to init HDMI audio infoframe\n");
+ return ret;
+ }
+
+ frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
+ frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
+ frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
+ frame.audio.channels = hdmi->hdmi_audio_channels;
+
+ ret = hdmi_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("Failed to pack HDMI audio infoframe\n");
+ return ret;
+ }
+
+ for (i = 0; i < sizeof(buffer); i++)
+ writeb(buffer[i],
+ hdmi->base + SUN4I_HDMI_AUDIO_INFOFRAME_REG(i));
+
+ return 0;
+}
+
+static void sun4i_hdmi_audio_set_cts_n(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ struct drm_encoder *encoder = &hdmi->encoder;
+ struct drm_crtc *crtc = encoder->crtc;
+ const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ u32 rate = params_rate(params);
+ u32 n, cts;
+ u64 tmp;
+
+ /**
+ * Calculate Cycle Time Stamp (CTS) and Numerator (N):
+ *
+ * N = 128 * Samplerate / 1000
+ * CTS = (Ftdms * N) / (128 * Samplerate)
+ */
+
+ n = 128 * rate / 1000;
+ tmp = (u64)(mode->clock * 1000) * n;
+ do_div(tmp, 128 * rate);
+ cts = tmp;
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTS_REG,
+ SUN4I_HDMI_AUDIO_CTS(cts));
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_N_REG,
+ SUN4I_HDMI_AUDIO_N(n));
+}
+
+static int sun4i_hdmi_audio_set_hw_rate(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ u32 rate = params_rate(params);
+ u32 val;
+
+ switch (rate) {
+ case 44100:
+ val = 0x0;
+ break;
+ case 48000:
+ val = 0x2;
+ break;
+ case 32000:
+ val = 0x3;
+ break;
+ case 88200:
+ val = 0x8;
+ break;
+ case 96000:
+ val = 0x9;
+ break;
+ case 176400:
+ val = 0xc;
+ break;
+ case 192000:
+ val = 0xe;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_STAT0_REG,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ(val));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_set_hw_channels(struct sun4i_hdmi *hdmi,
+ struct snd_pcm_hw_params *params)
+{
+ u32 channels = params_channels(params);
+
+ if (channels > 8)
+ return -EINVAL;
+
+ hdmi->hdmi_audio_channels = channels;
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_LAYOUT,
+ (channels > 2) ? SUN4I_HDMI_AUDIO_FMT_LAYOUT : 0);
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG(channels));
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_PCM_REG, 0x76543210);
+
+ /**
+ * If only one channel is required, send the same sample
+ * to the sink device as a left and right channel.
+ */
+ if (channels == 1)
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_PCM_REG,
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(1),
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP(1, 1));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = sun4i_hdmi_audio_set_hw_rate(hdmi, params);
+ if (ret)
+ return ret;
+
+ ret = sun4i_hdmi_audio_set_hw_channels(hdmi, params);
+ if (ret)
+ return ret;
+
+ sun4i_hdmi_audio_set_cts_n(hdmi, params);
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_trigger(struct snd_pcm_substream *substream,
+ int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi *hdmi = snd_soc_card_get_drvdata(card);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ ret = sun4i_hdmi_setup_audio_infoframes(hdmi);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const struct snd_soc_dai_ops sun4i_hdmi_audio_dai_ops = {
+ .startup = sun4i_hdmi_audio_startup,
+ .shutdown = sun4i_hdmi_audio_shutdown,
+ .hw_params = sun4i_hdmi_audio_hw_params,
+ .trigger = sun4i_hdmi_audio_trigger,
+};
+
+static int sun4i_hdmi_audio_dai_probe(struct snd_soc_dai *dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ dma_data = devm_kzalloc(dai->dev, sizeof(*dma_data), GFP_KERNEL);
+ if (!dma_data)
+ return -ENOMEM;
+
+ dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_data->maxburst = 8;
+
+ snd_soc_dai_init_dma_data(dai, dma_data, NULL);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver sun4i_hdmi_audio_dai = {
+ .name = "HDMI",
+ .ops = &sun4i_hdmi_audio_dai_ops,
+ .probe = sun4i_hdmi_audio_dai_probe,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ },
+};
+
+static const struct snd_pcm_hardware sun4i_hdmi_audio_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = 128 * 1024,
+ .period_bytes_min = 4 * 1024,
+ .period_bytes_max = 32 * 1024,
+ .periods_min = 2,
+ .periods_max = 8,
+ .fifo_size = 128,
+};
+
+static const struct snd_dmaengine_pcm_config sun4i_hdmi_audio_pcm_config = {
+ .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-tx",
+ .pcm_hardware = &sun4i_hdmi_audio_pcm_hardware,
+ .prealloc_buffer_size = 128 * 1024,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+struct snd_soc_card sun4i_hdmi_audio_card = {
+ .name = "sun4i-hdmi",
+};
+
+int sun4i_hdmi_audio_create(struct sun4i_hdmi *hdmi)
+{
+ struct snd_soc_card *card = &sun4i_hdmi_audio_card;
+ struct snd_soc_dai_link_component *comp;
+ struct snd_soc_dai_link *link;
+ int ret;
+
+ ret = devm_snd_dmaengine_pcm_register(hdmi->dev,
+ &sun4i_hdmi_audio_pcm_config, 0);
+ if (ret) {
+ DRM_ERROR("Could not register PCM\n");
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(hdmi->dev,
+ &sun4i_hdmi_audio_component,
+ &sun4i_hdmi_audio_dai, 1);
+ if (ret) {
+ DRM_ERROR("Could not register DAI\n");
+ return ret;
+ }
+
+ link = devm_kzalloc(hdmi->dev, sizeof(*link), GFP_KERNEL);
+ if (!link)
+ return -ENOMEM;
+
+ comp = devm_kzalloc(hdmi->dev, sizeof(*comp) * 3, GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ link->cpus = &comp[0];
+ link->codecs = &comp[1];
+ link->platforms = &comp[2];
+
+ link->num_cpus = 1;
+ link->num_codecs = 1;
+ link->num_platforms = 1;
+
+ link->playback_only = 1;
+
+ link->name = "SUN4I-HDMI";
+ link->stream_name = "SUN4I-HDMI PCM";
+
+ link->codecs->name = dev_name(hdmi->dev);
+ link->codecs->dai_name = sun4i_hdmi_audio_dai.name;
+
+ link->cpus->dai_name = dev_name(hdmi->dev);
+
+ link->platforms->name = dev_name(hdmi->dev);
+
+ link->dai_fmt = SND_SOC_DAIFMT_I2S;
+
+ card->dai_link = link;
+ card->num_links = 1;
+ card->dev = hdmi->dev;
+
+ snd_soc_card_set_drvdata(card, hdmi);
+ return devm_snd_soc_register_card(hdmi->dev, card);
+}
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index a7c4654445c7..79ecd89fb705 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -114,6 +114,9 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder)
val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+
+ if (hdmi->hdmi_audio && sun4i_hdmi_audio_create(hdmi))
+ DRM_ERROR("Couldn't create the HDMI audio adapter\n");
}
static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
@@ -218,6 +221,7 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector)
if (!edid)
return 0;
+ hdmi->hdmi_audio = drm_detect_monitor_audio(edid);
hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
--
2.17.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2020-01-10 14:43 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 14:11 [PATCH 0/2] Add support for sun4i HDMI audio Stefan Mavrodiev
2020-01-10 14:11 ` Stefan Mavrodiev
2020-01-10 14:11 ` Stefan Mavrodiev
2020-01-10 14:11 ` [PATCH 1/2] dmaengine: sun4i: Add support for cyclic requests with dedicated DMA Stefan Mavrodiev
2020-01-10 14:11 ` Stefan Mavrodiev
2020-01-10 14:11 ` Stefan Mavrodiev
2020-01-10 16:18 ` Maxime Ripard
2020-01-10 16:18 ` Maxime Ripard
2020-01-10 16:18 ` Maxime Ripard
2020-01-15 12:31 ` Vinod Koul
2020-01-15 12:31 ` Vinod Koul
2020-01-15 12:31 ` Vinod Koul
2020-01-15 17:07 ` Maxime Ripard
2020-01-15 17:07 ` Maxime Ripard
2020-01-15 17:07 ` Maxime Ripard
2020-01-21 8:35 ` Vinod Koul
2020-01-21 8:35 ` Vinod Koul
2020-01-21 8:35 ` Vinod Koul
2020-01-21 11:37 ` Stefan Mavrodiev
2020-01-21 11:37 ` Stefan Mavrodiev
2020-01-21 11:37 ` Stefan Mavrodiev
2020-01-21 12:14 ` Vinod Koul
2020-01-21 12:14 ` Vinod Koul
2020-01-21 12:14 ` Vinod Koul
2020-01-10 14:11 ` Stefan Mavrodiev [this message]
2020-01-10 14:11 ` [PATCH 2/2] drm: sun4i: hdmi: Add support for sun4i HDMI encoder audio Stefan Mavrodiev
2020-01-10 14:11 ` Stefan Mavrodiev
2020-01-10 16:26 ` Maxime Ripard
2020-01-10 16:26 ` Maxime Ripard
2020-01-10 16:26 ` Maxime Ripard
2020-01-14 9:04 ` Stefan Mavrodiev
2020-01-14 9:04 ` Stefan Mavrodiev
2020-01-14 9:04 ` Stefan Mavrodiev
2020-01-15 8:32 ` Maxime Ripard
2020-01-15 8:32 ` Maxime Ripard
2020-01-15 8:32 ` Maxime Ripard
2020-01-15 12:23 ` Stefan Mavrodiev
2020-01-15 12:23 ` Stefan Mavrodiev
2020-01-15 12:23 ` Stefan Mavrodiev
2020-01-10 16:30 ` [linux-sunxi] " Chen-Yu Tsai
2020-01-10 16:30 ` Chen-Yu Tsai
2020-01-10 16:30 ` Chen-Yu Tsai
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200110141140.28527-3-stefan@olimex.com \
--to=stefan@olimex.com \
--cc=airlied@linux.ie \
--cc=dan.j.williams@intel.com \
--cc=daniel@ffwll.ch \
--cc=dmaengine@vger.kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sunxi@googlegroups.com \
--cc=mripard@kernel.org \
--cc=vkoul@kernel.org \
--cc=wens@csie.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.