Add audio HDMI codec function support, enable it through device true flag "analogix,audio-enable".
Reviewed-by: Robert Foss robert.foss@linaro.org Signed-off-by: Xin Ji xji@analogixsemi.com --- drivers/gpu/drm/bridge/analogix/anx7625.c | 227 ++++++++++++++++++++++ drivers/gpu/drm/bridge/analogix/anx7625.h | 5 + 2 files changed, 232 insertions(+)
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index fb2301a92704..85ee1fb8b678 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -32,6 +32,8 @@ #include <drm/drm_print.h> #include <drm/drm_probe_helper.h>
+#include <sound/hdmi-codec.h> + #include <video/display_timing.h>
#include "anx7625.h" @@ -152,6 +154,20 @@ static int anx7625_write_and(struct anx7625_data *ctx, return anx7625_reg_write(ctx, client, offset, (val & (mask))); }
+static int anx7625_write_and_or(struct anx7625_data *ctx, + struct i2c_client *client, + u8 offset, u8 and_mask, u8 or_mask) +{ + int val; + + val = anx7625_reg_read(ctx, client, offset); + if (val < 0) + return val; + + return anx7625_reg_write(ctx, client, + offset, (val & and_mask) | (or_mask)); +} + static int anx7625_config_bit_matrix(struct anx7625_data *ctx) { int i, ret; @@ -1324,6 +1340,9 @@ static int anx7625_parse_dt(struct device *dev, else DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
+ if (of_property_read_bool(np, "analogix,audio-enable")) + pdata->audio_en = 1; + ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); if (ret < 0) { if (ret == -ENODEV) @@ -1394,6 +1413,208 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx) connector_status_disconnected; }
+static int anx7625_audio_hw_params(struct device *dev, void *data, + struct hdmi_codec_daifmt *fmt, + struct hdmi_codec_params *params) +{ + struct anx7625_data *ctx = dev_get_drvdata(dev); + int wl, ch, rate; + int ret = 0; + + if (fmt->fmt != HDMI_DSP_A) { + DRM_DEV_ERROR(dev, "only supports DSP_A\n"); + return -EINVAL; + } + + DRM_DEV_DEBUG_DRIVER(dev, "setting %d Hz, %d bit, %d channels\n", + params->sample_rate, params->sample_width, + params->cea.channels); + + ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, + AUDIO_CHANNEL_STATUS_6, + ~I2S_SLAVE_MODE, + TDM_SLAVE_MODE); + + /* Word length */ + switch (params->sample_width) { + case 16: + wl = AUDIO_W_LEN_16_20MAX; + break; + case 18: + wl = AUDIO_W_LEN_18_20MAX; + break; + case 20: + wl = AUDIO_W_LEN_20_20MAX; + break; + case 24: + wl = AUDIO_W_LEN_24_24MAX; + break; + default: + DRM_DEV_DEBUG_DRIVER(dev, "wordlength: %d bit not support", + params->sample_width); + return -EINVAL; + } + ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, + AUDIO_CHANNEL_STATUS_5, + 0xf0, wl); + + /* Channel num */ + switch (params->cea.channels) { + case 2: + ch = I2S_CH_2; + break; + case 4: + ch = TDM_CH_4; + break; + case 6: + ch = TDM_CH_6; + break; + case 8: + ch = TDM_CH_8; + break; + default: + DRM_DEV_DEBUG_DRIVER(dev, "channel number: %d not support", + params->cea.channels); + return -EINVAL; + } + ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, + AUDIO_CHANNEL_STATUS_6, 0x1f, ch << 5); + if (ch > I2S_CH_2) + ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client, + AUDIO_CHANNEL_STATUS_6, AUDIO_LAYOUT); + else + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, + AUDIO_CHANNEL_STATUS_6, ~AUDIO_LAYOUT); + + /* FS */ + switch (params->sample_rate) { + case 32000: + rate = AUDIO_FS_32K; + break; + case 44100: + rate = AUDIO_FS_441K; + break; + case 48000: + rate = AUDIO_FS_48K; + break; + case 88200: + rate = AUDIO_FS_882K; + break; + case 96000: + rate = AUDIO_FS_96K; + break; + case 176400: + rate = AUDIO_FS_1764K; + break; + case 192000: + rate = AUDIO_FS_192K; + break; + default: + DRM_DEV_DEBUG_DRIVER(dev, "sample rate: %d not support", + params->sample_rate); + return -EINVAL; + } + ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, + AUDIO_CHANNEL_STATUS_4, + 0xf0, rate); + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, + AP_AV_STATUS, AP_AUDIO_CHG); + if (ret < 0) { + DRM_DEV_ERROR(dev, "IO error : config audio.\n"); + return -EIO; + } + + return 0; +} + +static void anx7625_audio_shutdown(struct device *dev, void *data) +{ + DRM_DEV_DEBUG_DRIVER(dev, "stop audio\n"); +} + +static int anx7625_hdmi_i2s_get_dai_id(struct snd_soc_component *component, + struct device_node *endpoint) +{ + struct of_endpoint of_ep; + int ret; + + ret = of_graph_parse_endpoint(endpoint, &of_ep); + if (ret < 0) + return ret; + + /* + * HDMI sound should be located at external DPI port + * Didn't have good way to check where is internal(DSI) + * or external(DPI) bridge + */ + return 0; +} + +static void +anx7625_audio_update_connector_status(struct anx7625_data *ctx, + enum drm_connector_status status) +{ + if (ctx->plugged_cb && ctx->codec_dev) { + ctx->plugged_cb(ctx->codec_dev, + status == connector_status_connected); + } +} + +static int anx7625_audio_hook_plugged_cb(struct device *dev, void *data, + hdmi_codec_plugged_cb fn, + struct device *codec_dev) +{ + struct anx7625_data *ctx = data; + + ctx->plugged_cb = fn; + ctx->codec_dev = codec_dev; + anx7625_audio_update_connector_status(ctx, anx7625_sink_detect(ctx)); + + return 0; +} + +static const struct hdmi_codec_ops anx7625_codec_ops = { + .hw_params = anx7625_audio_hw_params, + .audio_shutdown = anx7625_audio_shutdown, + .get_dai_id = anx7625_hdmi_i2s_get_dai_id, + .hook_plugged_cb = anx7625_audio_hook_plugged_cb, +}; + +static void anx7625_unregister_audio(struct anx7625_data *ctx) +{ + struct device *dev = &ctx->client->dev; + + if (ctx->audio_pdev) { + platform_device_unregister(ctx->audio_pdev); + ctx->audio_pdev = NULL; + } + + DRM_DEV_DEBUG_DRIVER(dev, "unbound to %s", HDMI_CODEC_DRV_NAME); +} + +static int anx7625_register_audio(struct device *dev, struct anx7625_data *ctx) +{ + struct hdmi_codec_pdata codec_data = { + .ops = &anx7625_codec_ops, + .max_i2s_channels = 8, + .i2s = 1, + .data = ctx, + }; + + ctx->audio_pdev = platform_device_register_data(dev, + HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, + &codec_data, + sizeof(codec_data)); + + if (IS_ERR(ctx->audio_pdev)) + return IS_ERR(ctx->audio_pdev); + + DRM_DEV_DEBUG_DRIVER(dev, "bound to %s", HDMI_CODEC_DRV_NAME); + + return 0; +} + static int anx7625_attach_dsi(struct anx7625_data *ctx) { struct mipi_dsi_device *dsi; @@ -1958,6 +2179,9 @@ static int anx7625_i2c_probe(struct i2c_client *client, DRM_MODE_CONNECTOR_DisplayPort; drm_bridge_add(&platform->bridge);
+ if (platform->pdata.audio_en) + anx7625_register_audio(dev, platform); + DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
return 0; @@ -1986,6 +2210,9 @@ static int anx7625_i2c_remove(struct i2c_client *client)
anx7625_unregister_i2c_dummy_clients(platform);
+ if (platform->pdata.audio_en) + anx7625_unregister_audio(platform); + kfree(platform); return 0; } diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h index 65db38e5da9a..a9bdf05a1f66 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.h +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h @@ -111,6 +111,7 @@ #define AUDIO_CHANNEL_STATUS_6 0xd5 #define TDM_SLAVE_MODE 0x10 #define I2S_SLAVE_MODE 0x08 +#define AUDIO_LAYOUT 0x01
#define AUDIO_CONTROL_REGISTER 0xe6 #define TDM_TIMING_MODE 0x08 @@ -365,6 +366,7 @@ struct anx7625_platform_data { int intp_irq; int is_dpi; int mipi_lanes; + int audio_en; int dp_lane0_swing_reg_cnt; int lane0_reg_data[DP_TX_SWING_REG_CNT]; int dp_lane1_swing_reg_cnt; @@ -385,6 +387,7 @@ struct anx7625_i2c_client {
struct anx7625_data { struct anx7625_platform_data pdata; + struct platform_device *audio_pdev; int hpd_status; int hpd_high_cnt; /* Lock for work queue */ @@ -393,6 +396,8 @@ struct anx7625_data { struct anx7625_i2c_client i2c; struct i2c_client *last_client; struct s_edid_data slimport_edid_p; + struct device *codec_dev; + hdmi_codec_plugged_cb plugged_cb; struct work_struct work; struct workqueue_struct *workqueue; char edid_block;