[PATCH v10] drm/rockchip: rk3066_hdmi: add sound support
Andy Yan
andyshrk at 163.com
Sun Jul 7 19:36:47 PDT 2024
Hi Johan,
Thanks for your patch.
At 2024-07-04 21:48:13, "Johan Jonker" <jbx6244 at gmail.com> wrote:
>Add sound support to the RK3066 HDMI driver.
>The HDMI TX audio source is connected to I2S_8CH.
>
>Signed-off-by: Zheng Yang <zhengyang at rock-chips.com>
>Signed-off-by: Johan Jonker <jbx6244 at gmail.com>
Reviewed-by: Andy Yan <andy.yan at rock-chips.com>
>---
>
>Changed V10:
> s/audio_enable/audio_enabled
> hook to encoder->funcs->late_register
> move audio functions up to avoid adding a declaration
>
>Changed V9:
> Use late_register and early_unregister hooks to
> (un)register the "hdmi-audio-codec" driver.
> restyle
>
>Changed V8:
> return -EPROBE_DEFER as early as possible
> move rk3066_hdmi_audio_codec_init() function after rk3066_hdmi_register()
> restyle
>
>Changed V7:
> rebase
>---
> drivers/gpu/drm/rockchip/Kconfig | 2 +
> drivers/gpu/drm/rockchip/rk3066_hdmi.c | 330 +++++++++++++++++++++++--
> 2 files changed, 306 insertions(+), 26 deletions(-)
>
>diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
>index 1bf3e2829cd0..a32ee558408c 100644
>--- a/drivers/gpu/drm/rockchip/Kconfig
>+++ b/drivers/gpu/drm/rockchip/Kconfig
>@@ -102,6 +102,8 @@ config ROCKCHIP_RGB
> config ROCKCHIP_RK3066_HDMI
> bool "Rockchip specific extensions for RK3066 HDMI"
> depends on DRM_ROCKCHIP
>+ select SND_SOC_HDMI_CODEC if SND_SOC
>+ select SND_SOC_ROCKCHIP_I2S if SND_SOC
> help
> This selects support for Rockchip SoC specific extensions
> for the RK3066 HDMI driver. If you want to enable
>diff --git a/drivers/gpu/drm/rockchip/rk3066_hdmi.c b/drivers/gpu/drm/rockchip/rk3066_hdmi.c
>index 784de990da1b..e3b8faf89ae2 100644
>--- a/drivers/gpu/drm/rockchip/rk3066_hdmi.c
>+++ b/drivers/gpu/drm/rockchip/rk3066_hdmi.c
>@@ -15,12 +15,20 @@
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
>
>+#include <sound/hdmi-codec.h>
>+
> #include "rk3066_hdmi.h"
>
> #include "rockchip_drm_drv.h"
>
> #define DEFAULT_PLLA_RATE 30000000
>
>+struct rk3066_hdmi_audio_info {
>+ int channels;
>+ int sample_rate;
>+ int sample_width;
>+};
>+
> struct hdmi_data_info {
> int vic; /* The CEA Video ID (VIC) of the current drm display mode. */
> unsigned int enc_out_format;
>@@ -40,7 +48,6 @@ struct rk3066_hdmi_i2c {
>
> struct rk3066_hdmi {
> struct device *dev;
>- struct drm_device *drm_dev;
> struct regmap *grf_regmap;
> int irq;
> struct clk *hclk;
>@@ -54,6 +61,10 @@ struct rk3066_hdmi {
>
> unsigned int tmdsclk;
>
>+ struct platform_device *audio_pdev;
>+ struct rk3066_hdmi_audio_info audio;
>+ bool audio_enabled;
>+
> struct hdmi_data_info hdmi_data;
> };
>
>@@ -214,6 +225,241 @@ static int rk3066_hdmi_config_avi(struct rk3066_hdmi *hdmi,
> HDMI_INFOFRAME_AVI, 0, 0, 0);
> }
>
>+static int rk3066_hdmi_config_aai(struct rk3066_hdmi *hdmi)
>+{
>+ union hdmi_infoframe frame;
>+ int rc;
>+
>+ rc = hdmi_audio_infoframe_init(&frame.audio);
>+
>+ 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->audio.channels;
>+
>+ return rk3066_hdmi_upload_frame(hdmi, rc, &frame,
>+ HDMI_INFOFRAME_AAI, 0, 0, 0);
>+}
>+
>+static int rk3066_hdmi_audio_config(struct rk3066_hdmi *hdmi)
>+{
>+ u32 rate, channel, word_length, N, CTS;
>+ struct rk3066_hdmi_audio_info *audio = &hdmi->audio;
>+ u64 tmp;
>+
>+ if (audio->channels < 3)
>+ channel = HDMI_AUDIO_I2S_CHANNEL_1_2;
>+ else if (audio->channels < 5)
>+ channel = HDMI_AUDIO_I2S_CHANNEL_3_4;
>+ else if (audio->channels < 7)
>+ channel = HDMI_AUDIO_I2S_CHANNEL_5_6;
>+ else
>+ channel = HDMI_AUDIO_I2S_CHANNEL_7_8;
>+
>+ switch (audio->sample_rate) {
>+ case 32000:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_32000;
>+ N = N_32K;
>+ break;
>+ case 44100:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_44100;
>+ N = N_441K;
>+ break;
>+ case 48000:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_48000;
>+ N = N_48K;
>+ break;
>+ case 88200:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_88200;
>+ N = N_882K;
>+ break;
>+ case 96000:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_96000;
>+ N = N_96K;
>+ break;
>+ case 176400:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_176400;
>+ N = N_1764K;
>+ break;
>+ case 192000:
>+ rate = HDMI_AUDIO_SAMPLE_FRE_192000;
>+ N = N_192K;
>+ break;
>+ default:
>+ DRM_DEV_ERROR(hdmi->dev, "no support for sample rate %d\n",
>+ audio->sample_rate);
>+ return -ENOENT;
>+ }
>+
>+ switch (audio->sample_width) {
>+ case 16:
>+ word_length = 0x02;
>+ break;
>+ case 20:
>+ word_length = 0x0a;
>+ break;
>+ case 24:
>+ word_length = 0x0b;
>+ break;
>+ default:
>+ DRM_DEV_ERROR(hdmi->dev, "no support for word length %d\n",
>+ audio->sample_width);
>+ return -ENOENT;
>+ }
>+
>+ tmp = (u64)hdmi->tmdsclk * N;
>+ do_div(tmp, 128 * audio->sample_rate);
>+ CTS = tmp;
>+
>+ /* Set_audio source I2S. */
>+ hdmi_writeb(hdmi, HDMI_AUDIO_CTRL1, 0x00);
>+ hdmi_writeb(hdmi, HDMI_AUDIO_CTRL2, 0x40);
>+ hdmi_writeb(hdmi, HDMI_I2S_AUDIO_CTRL,
>+ HDMI_AUDIO_I2S_FORMAT_STANDARD | channel);
>+ hdmi_writeb(hdmi, HDMI_I2S_SWAP, 0x00);
>+ hdmi_modb(hdmi, HDMI_AV_CTRL1, HDMI_AUDIO_SAMPLE_FRE_MASK, rate);
>+ hdmi_writeb(hdmi, HDMI_AUDIO_SRC_NUM_AND_LENGTH, word_length);
>+
>+ /* Set N value. */
>+ hdmi_modb(hdmi, HDMI_LR_SWAP_N3,
>+ HDMI_AUDIO_N_19_16_MASK, (N >> 16) & 0x0F);
>+ hdmi_writeb(hdmi, HDMI_N2, (N >> 8) & 0xFF);
>+ hdmi_writeb(hdmi, HDMI_N1, N & 0xFF);
>+
>+ /* Set CTS value. */
>+ hdmi_writeb(hdmi, HDMI_CTS_EXT1, CTS & 0xff);
>+ hdmi_writeb(hdmi, HDMI_CTS_EXT2, (CTS >> 8) & 0xff);
>+ hdmi_writeb(hdmi, HDMI_CTS_EXT3, (CTS >> 16) & 0xff);
>+
>+ if (audio->channels > 2)
>+ hdmi_modb(hdmi, HDMI_LR_SWAP_N3,
>+ HDMI_AUDIO_LR_SWAP_MASK,
>+ HDMI_AUDIO_LR_SWAP_SUBPACKET1);
>+ rate = (~(rate >> 4)) & 0x0f;
>+ hdmi_writeb(hdmi, HDMI_AUDIO_STA_BIT_CTRL1, rate);
>+ hdmi_writeb(hdmi, HDMI_AUDIO_STA_BIT_CTRL2, 0);
>+
>+ return rk3066_hdmi_config_aai(hdmi);
>+}
>+
>+static int rk3066_hdmi_audio_hw_params(struct device *dev, void *d,
>+ struct hdmi_codec_daifmt *daifmt,
>+ struct hdmi_codec_params *params)
>+{
>+ struct rk3066_hdmi *hdmi = dev_get_drvdata(dev);
>+ struct drm_display_info *display = &hdmi->connector.display_info;
>+
>+ if (!display->has_audio) {
>+ DRM_DEV_ERROR(hdmi->dev, "no audio support\n");
>+ return -ENODEV;
>+ }
>+
>+ if (!hdmi->encoder.encoder.crtc)
>+ return -ENODEV;
>+
>+ switch (daifmt->fmt) {
>+ case HDMI_I2S:
>+ break;
>+ default:
>+ DRM_DEV_ERROR(dev, "invalid format %d\n", daifmt->fmt);
>+ return -EINVAL;
>+ }
>+
>+ hdmi->audio.channels = params->channels;
>+ hdmi->audio.sample_rate = params->sample_rate;
>+ hdmi->audio.sample_width = params->sample_width;
>+
>+ return rk3066_hdmi_audio_config(hdmi);
>+}
>+
>+static void rk3066_hdmi_audio_shutdown(struct device *dev, void *d)
>+{
>+ /* Do nothing. */
>+}
>+
>+static int rk3066_hdmi_audio_mute_stream(struct device *dev, void *d, bool mute, int direction)
>+{
>+ struct rk3066_hdmi *hdmi = dev_get_drvdata(dev);
>+ struct drm_display_info *display = &hdmi->connector.display_info;
>+
>+ if (!display->has_audio) {
>+ DRM_DEV_ERROR(hdmi->dev, "no audio support\n");
>+ return -ENODEV;
>+ }
>+
>+ hdmi->audio_enabled = !mute;
>+
>+ if (mute)
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
>+ HDMI_AUDIO_DISABLE, HDMI_AUDIO_DISABLE);
>+ else
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2, HDMI_AUDIO_DISABLE, 0);
>+
>+ /*
>+ * Under power mode E we need to reset the audio capture logic to
>+ * make the audio setting update.
>+ */
>+ if (rk3066_hdmi_get_power_mode(hdmi) == HDMI_SYS_POWER_MODE_E) {
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
>+ HDMI_AUDIO_CP_LOGIC_RESET_MASK,
>+ HDMI_AUDIO_CP_LOGIC_RESET);
>+ usleep_range(900, 1000);
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
>+ HDMI_AUDIO_CP_LOGIC_RESET_MASK, 0);
>+ }
>+
>+ return 0;
>+}
>+
>+static int rk3066_hdmi_audio_get_eld(struct device *dev, void *d, u8 *buf, size_t len)
>+{
>+ struct rk3066_hdmi *hdmi = dev_get_drvdata(dev);
>+ struct drm_mode_config *config = &hdmi->encoder.encoder.dev->mode_config;
>+ struct drm_connector *connector;
>+ int ret = -ENODEV;
>+
>+ mutex_lock(&config->mutex);
>+ list_for_each_entry(connector, &config->connector_list, head) {
>+ if (&hdmi->encoder.encoder == connector->encoder) {
>+ memcpy(buf, connector->eld,
>+ min(sizeof(connector->eld), len));
>+ ret = 0;
>+ }
>+ }
>+ mutex_unlock(&config->mutex);
>+
>+ return ret;
>+}
>+
>+static const struct hdmi_codec_ops rk3066_hdmi_audio_codec_ops = {
>+ .hw_params = rk3066_hdmi_audio_hw_params,
>+ .audio_shutdown = rk3066_hdmi_audio_shutdown,
>+ .mute_stream = rk3066_hdmi_audio_mute_stream,
>+ .get_eld = rk3066_hdmi_audio_get_eld,
>+ .no_capture_mute = 1,
>+};
>+
>+static int rk3066_hdmi_audio_codec_init(struct rk3066_hdmi *hdmi)
>+{
>+ struct hdmi_codec_pdata rk3066_hdmi_codec_data = {
>+ .i2s = 1,
>+ .ops = &rk3066_hdmi_audio_codec_ops,
>+ .max_i2s_channels = 8,
>+ };
>+
>+ hdmi->audio.channels = 2;
>+ hdmi->audio.sample_rate = 48000;
>+ hdmi->audio.sample_width = 16;
>+ hdmi->audio_enabled = false;
>+ hdmi->audio_pdev = platform_device_register_data(hdmi->dev,
>+ HDMI_CODEC_DRV_NAME,
>+ PLATFORM_DEVID_NONE,
>+ &rk3066_hdmi_codec_data,
>+ sizeof(rk3066_hdmi_codec_data));
>+
>+ return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
>+}
>+
> static int rk3066_hdmi_config_video_timing(struct rk3066_hdmi *hdmi,
> struct drm_display_mode *mode)
> {
>@@ -364,6 +610,7 @@ static int rk3066_hdmi_setup(struct rk3066_hdmi *hdmi,
> hdmi_modb(hdmi, HDMI_HDCP_CTRL, HDMI_VIDEO_MODE_MASK,
> HDMI_VIDEO_MODE_HDMI);
> rk3066_hdmi_config_avi(hdmi, mode);
>+ rk3066_hdmi_audio_config(hdmi);
> } else {
> hdmi_modb(hdmi, HDMI_HDCP_CTRL, HDMI_VIDEO_MODE_MASK, 0);
> }
>@@ -380,9 +627,20 @@ static int rk3066_hdmi_setup(struct rk3066_hdmi *hdmi,
> */
> rk3066_hdmi_i2c_init(hdmi);
>
>- /* Unmute video output. */
>+ /* Unmute video and audio output. */
> hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
> HDMI_VIDEO_AUDIO_DISABLE_MASK, HDMI_AUDIO_DISABLE);
>+ if (hdmi->audio_enabled) {
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2, HDMI_AUDIO_DISABLE, 0);
>+ /* Reset audio capture logic. */
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
>+ HDMI_AUDIO_CP_LOGIC_RESET_MASK,
>+ HDMI_AUDIO_CP_LOGIC_RESET);
>+ usleep_range(900, 1000);
>+ hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
>+ HDMI_AUDIO_CP_LOGIC_RESET_MASK, 0);
>+ }
>+
> return 0;
> }
>
>@@ -431,6 +689,7 @@ static void rk3066_hdmi_encoder_disable(struct drm_encoder *encoder,
> HDMI_AUDIO_CP_LOGIC_RESET);
> usleep_range(500, 510);
> }
>+
> rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_A);
> }
>
>@@ -447,6 +706,26 @@ rk3066_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
> return 0;
> }
>
>+static int rk3066_hdmi_encoder_late_register(struct drm_encoder *encoder)
>+{
>+ struct rk3066_hdmi *hdmi = encoder_to_rk3066_hdmi(encoder);
>+
>+ return rk3066_hdmi_audio_codec_init(hdmi);
>+}
>+
>+static void rk3066_hdmi_encoder_early_unregister(struct drm_encoder *encoder)
>+{
>+ struct rk3066_hdmi *hdmi = encoder_to_rk3066_hdmi(encoder);
>+
>+ platform_device_unregister(hdmi->audio_pdev);
>+}
>+
>+static const struct drm_encoder_funcs rk3066_hdmi_encoder_funcs = {
>+ .destroy = drm_encoder_cleanup,
>+ .late_register = rk3066_hdmi_encoder_late_register,
>+ .early_unregister = rk3066_hdmi_encoder_early_unregister,
>+};
>+
> static const
> struct drm_encoder_helper_funcs rk3066_hdmi_encoder_helper_funcs = {
> .atomic_check = rk3066_hdmi_encoder_atomic_check,
>@@ -519,41 +798,28 @@ static void rk3066_hdmi_connector_destroy(struct drm_connector *connector)
> }
>
> static const struct drm_connector_funcs rk3066_hdmi_connector_funcs = {
>- .fill_modes = rk3066_hdmi_probe_single_connector_modes,
>- .detect = rk3066_hdmi_connector_detect,
>- .destroy = rk3066_hdmi_connector_destroy,
>- .reset = drm_atomic_helper_connector_reset,
>+ .fill_modes = rk3066_hdmi_probe_single_connector_modes,
>+ .detect = rk3066_hdmi_connector_detect,
>+ .destroy = rk3066_hdmi_connector_destroy,
>+ .reset = drm_atomic_helper_connector_reset,
> .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
>- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
>+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> };
>
> static const
> struct drm_connector_helper_funcs rk3066_hdmi_connector_helper_funcs = {
>- .get_modes = rk3066_hdmi_connector_get_modes,
>- .mode_valid = rk3066_hdmi_connector_mode_valid,
>+ .get_modes = rk3066_hdmi_connector_get_modes,
>+ .mode_valid = rk3066_hdmi_connector_mode_valid,
> .best_encoder = rk3066_hdmi_connector_best_encoder,
> };
>
>-static int
>-rk3066_hdmi_register(struct drm_device *drm, struct rk3066_hdmi *hdmi)
>+static int rk3066_hdmi_register(struct drm_device *drm, struct rk3066_hdmi *hdmi)
> {
> struct drm_encoder *encoder = &hdmi->encoder.encoder;
>- struct device *dev = hdmi->dev;
>-
>- encoder->possible_crtcs =
>- drm_of_find_possible_crtcs(drm, dev->of_node);
>-
>- /*
>- * If we failed to find the CRTC(s) which this encoder is
>- * supposed to be connected to, it's because the CRTC has
>- * not been registered yet. Defer probing, and hope that
>- * the required CRTC is added later.
>- */
>- if (encoder->possible_crtcs == 0)
>- return -EPROBE_DEFER;
>
> drm_encoder_helper_add(encoder, &rk3066_hdmi_encoder_helper_funcs);
>- drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
>+ drm_encoder_init(drm, encoder, &rk3066_hdmi_encoder_funcs,
>+ DRM_MODE_ENCODER_TMDS, NULL);
>
> hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
>
>@@ -740,6 +1006,7 @@ static int rk3066_hdmi_bind(struct device *dev, struct device *master,
> {
> struct platform_device *pdev = to_platform_device(dev);
> struct drm_device *drm = data;
>+ struct drm_encoder *encoder;
> struct rk3066_hdmi *hdmi;
> int irq;
> int ret;
>@@ -748,8 +1015,19 @@ static int rk3066_hdmi_bind(struct device *dev, struct device *master,
> if (!hdmi)
> return -ENOMEM;
>
>+ encoder = &hdmi->encoder.encoder;
>+ encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
>+
>+ /*
>+ * If we failed to find the CRTC(s) which this encoder is
>+ * supposed to be connected to, it's because the CRTC has
>+ * not been registered yet. Defer probing and hope that
>+ * the required CRTC is added later.
>+ */
>+ if (encoder->possible_crtcs == 0)
>+ return -EPROBE_DEFER;
>+
> hdmi->dev = dev;
>- hdmi->drm_dev = drm;
> hdmi->regs = devm_platform_ioremap_resource(pdev, 0);
> if (IS_ERR(hdmi->regs))
> return PTR_ERR(hdmi->regs);
>--
>2.39.2
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