Add the interface needed by Jyri's generic hdmi-codec driver [1] to start or stop audio playback and to retrieve ELD (EDID like data) to limit the supported audio formats to the HDMI sink capabilities.
[1] https://patchwork.kernel.org/patch/7215271/ ("ASoC: hdmi-codec: Add hdmi-codec for external HDMI-encoders")
Signed-off-by: Jie Qiu jie.qiu@mediatek.com Signed-off-by: Philipp Zabel p.zabel@pengutronix.de --- drivers/gpu/drm/mediatek/Kconfig | 1 + drivers/gpu/drm/mediatek/mtk_drm_hdmi_drv.c | 145 ++++++++++++++++++++++++++++ drivers/gpu/drm/mediatek/mtk_hdmi.c | 89 +++++++++-------- drivers/gpu/drm/mediatek/mtk_hdmi.h | 10 +- drivers/gpu/drm/mediatek/mtk_hdmi_hw.c | 94 +++--------------- drivers/gpu/drm/mediatek/mtk_hdmi_hw.h | 4 +- 6 files changed, 207 insertions(+), 136 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kconfig index 829ab66..93b7ca9 100644 --- a/drivers/gpu/drm/mediatek/Kconfig +++ b/drivers/gpu/drm/mediatek/Kconfig @@ -17,6 +17,7 @@ config DRM_MEDIATEK config DRM_MEDIATEK_HDMI tristate "DRM HDMI Support for Mediatek SoCs" depends on DRM_MEDIATEK + select SND_SOC_HDMI_CODEC if SND_SOC select GENERIC_PHY help DRM/KMS HDMI driver for Mediatek SoCs diff --git a/drivers/gpu/drm/mediatek/mtk_drm_hdmi_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_hdmi_drv.c index ff661e0..96ad53a 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_hdmi_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_hdmi_drv.c @@ -26,6 +26,7 @@ #include <linux/of_graph.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> +#include <sound/hdmi-codec.h> #include "mtk_cec.h" #include "mtk_hdmi.h" #include "mtk_hdmi_hw.h" @@ -421,6 +422,148 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, return 0; }
+/* + * HDMI audio codec callbacks + */ + +static int mtk_hdmi_audio_hw_params(struct device *dev, + struct hdmi_codec_daifmt *daifmt, + struct hdmi_codec_params *params) +{ + struct mtk_hdmi *hdmi = dev_get_drvdata(dev); + struct hdmi_audio_param hdmi_params; + unsigned int chan = params->cea.channels; + + dev_dbg(hdmi->dev, "%s: %u Hz, %d bit, %d channels\n", __func__, + params->sample_rate, params->sample_width, chan); + + if (!hdmi->bridge.encoder) + return -ENODEV; + + switch (chan) { + case 2: + hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0; + break; + case 4: + hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_4_0; + break; + case 6: + hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_5_1; + break; + case 8: + hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_7_1; + break; + default: + dev_err(hdmi->dev, "channel[%d] not supported!\n", chan); + return -EINVAL; + } + + switch (params->sample_rate) { + case 32000: + case 44100: + case 48000: + case 88200: + case 96000: + case 176400: + case 192000: + break; + default: + dev_err(hdmi->dev, "rate[%d] not supported!\n", + params->sample_rate); + return -EINVAL; + } + + switch (daifmt->fmt) { + case HDMI_I2S: + hdmi_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM; + hdmi_params.aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16; + hdmi_params.aud_input_type = HDMI_AUD_INPUT_I2S; + hdmi_params.aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT; + hdmi_params.aud_mclk = HDMI_AUD_MCLK_128FS; + break; + default: + dev_err(hdmi->dev, "%s: Invalid DAI format %d\n", __func__, + daifmt->fmt); + return -EINVAL; + } + + memcpy(&hdmi_params.codec_params, params, + sizeof(hdmi_params.codec_params)); + + mtk_hdmi_audio_set_param(hdmi, &hdmi_params); + + return 0; +} + +static int mtk_hdmi_audio_startup(struct device *dev, + void (*abort_cb)(struct device *dev)) +{ + struct mtk_hdmi *hdmi = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + mtk_hdmi_audio_enable(hdmi); + + return 0; +} + +static void mtk_hdmi_audio_shutdown(struct device *dev) +{ + struct mtk_hdmi *hdmi = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + mtk_hdmi_audio_disable(hdmi); +} + +int mtk_hdmi_audio_digital_mute(struct device *dev, bool enable) +{ + struct mtk_hdmi *hdmi = dev_get_drvdata(dev); + + dev_dbg(dev, "%s(%d)\n", __func__, enable); + + mtk_hdmi_hw_aud_mute(hdmi, enable); + + return 0; +} + +static int mtk_hdmi_audio_get_eld(struct device *dev, uint8_t *buf, size_t len) +{ + struct mtk_hdmi *hdmi = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + memcpy(buf, hdmi->conn.eld, min(sizeof(hdmi->conn.eld), len)); + + return 0; +} + +static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = { + .hw_params = mtk_hdmi_audio_hw_params, + .audio_startup = mtk_hdmi_audio_startup, + .audio_shutdown = mtk_hdmi_audio_shutdown, + .digital_mute = mtk_hdmi_audio_digital_mute, + .get_eld = mtk_hdmi_audio_get_eld, +}; + +static void mtk_hdmi_register_audio_driver(struct device *dev) +{ + struct hdmi_codec_pdata codec_data = { + .ops = &mtk_hdmi_audio_codec_ops, + .max_i2s_channels = 2, + .i2s = 1, + }; + struct platform_device *pdev; + + pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, &codec_data, + sizeof(codec_data)); + if (IS_ERR(pdev)) + return; + + DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME); +} + static int mtk_drm_hdmi_probe(struct platform_device *pdev) { struct mtk_hdmi *hdmi; @@ -452,6 +595,8 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev) return ret; }
+ mtk_hdmi_register_audio_driver(dev); + hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs; hdmi->bridge.of_node = pdev->dev.of_node; ret = drm_bridge_add(&hdmi->bridge); diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c index 30ec7b5..573c48b 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -197,46 +197,30 @@ static int mtk_hdmi_aud_set_input(struct mtk_hdmi *hdmi) static int mtk_hdmi_aud_set_src(struct mtk_hdmi *hdmi, struct drm_display_mode *display_mode) { + unsigned int sample_rate = hdmi->aud_param.codec_params.sample_rate; mtk_hdmi_aud_on_off_hw_ncts(hdmi, false);
if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_I2S) { - switch (hdmi->aud_param.aud_hdmi_fs) { - case HDMI_AUDIO_SAMPLE_FREQUENCY_32000: - case HDMI_AUDIO_SAMPLE_FREQUENCY_44100: - case HDMI_AUDIO_SAMPLE_FREQUENCY_48000: - case HDMI_AUDIO_SAMPLE_FREQUENCY_88200: - case HDMI_AUDIO_SAMPLE_FREQUENCY_96000: + switch (sample_rate) { + case 32000: + case 44100: + case 48000: + case 88200: + case 96000: mtk_hdmi_hw_aud_src_off(hdmi); /* mtk_hdmi_hw_aud_src_enable(hdmi, false); */ - mtk_hdmi_hw_aud_set_mclk( - hdmi, - hdmi->aud_param.aud_mclk); + mtk_hdmi_hw_aud_set_mclk(hdmi, + hdmi->aud_param.aud_mclk); mtk_hdmi_hw_aud_aclk_inv_enable(hdmi, false); break; default: break; } } else { - switch (hdmi->aud_param.iec_frame_fs) { - case HDMI_IEC_32K: - hdmi->aud_param.aud_hdmi_fs = - HDMI_AUDIO_SAMPLE_FREQUENCY_32000; - mtk_hdmi_hw_aud_src_off(hdmi); - mtk_hdmi_hw_aud_set_mclk(hdmi, - HDMI_AUD_MCLK_128FS); - mtk_hdmi_hw_aud_aclk_inv_enable(hdmi, false); - break; - case HDMI_IEC_48K: - hdmi->aud_param.aud_hdmi_fs = - HDMI_AUDIO_SAMPLE_FREQUENCY_48000; - mtk_hdmi_hw_aud_src_off(hdmi); - mtk_hdmi_hw_aud_set_mclk(hdmi, - HDMI_AUD_MCLK_128FS); - mtk_hdmi_hw_aud_aclk_inv_enable(hdmi, false); - break; - case HDMI_IEC_44K: - hdmi->aud_param.aud_hdmi_fs = - HDMI_AUDIO_SAMPLE_FREQUENCY_44100; + switch (sample_rate) { + case 32000: + case 44100: + case 48000: mtk_hdmi_hw_aud_src_off(hdmi); mtk_hdmi_hw_aud_set_mclk(hdmi, HDMI_AUD_MCLK_128FS); @@ -246,20 +230,10 @@ static int mtk_hdmi_aud_set_src(struct mtk_hdmi *hdmi, break; } } - mtk_hdmi_hw_aud_set_ncts(hdmi, hdmi->aud_param.aud_hdmi_fs, - display_mode->clock);
- mtk_hdmi_hw_aud_src_reenable(hdmi); - return 0; -} + mtk_hdmi_hw_aud_set_ncts(hdmi, sample_rate, display_mode->clock);
-static int mtk_hdmi_aud_set_chnl_status(struct mtk_hdmi *hdmi) -{ - mtk_hdmi_hw_aud_set_channel_status( - hdmi, - hdmi->aud_param.hdmi_l_channel_state, - hdmi->aud_param.hdmi_r_channel_state, - hdmi->aud_param.aud_hdmi_fs); + mtk_hdmi_hw_aud_src_reenable(hdmi); return 0; }
@@ -271,7 +245,8 @@ static int mtk_hdmi_aud_output_config(struct mtk_hdmi *hdmi,
mtk_hdmi_aud_set_input(hdmi); mtk_hdmi_aud_set_src(hdmi, display_mode); - mtk_hdmi_aud_set_chnl_status(hdmi); + mtk_hdmi_hw_aud_set_channel_status(hdmi, + hdmi->aud_param.codec_params.iec.status);
usleep_range(50, 100);
@@ -413,15 +388,11 @@ int mtk_hdmi_output_init(struct mtk_hdmi *hdmi) hdmi->csp = HDMI_COLORSPACE_RGB; hdmi->output = true; aud_param->aud_codec = HDMI_AUDIO_CODING_TYPE_PCM; - aud_param->aud_hdmi_fs = HDMI_AUDIO_SAMPLE_FREQUENCY_48000; aud_param->aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16; aud_param->aud_input_type = HDMI_AUD_INPUT_I2S; aud_param->aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT; aud_param->aud_mclk = HDMI_AUD_MCLK_128FS; - aud_param->iec_frame_fs = HDMI_IEC_48K; aud_param->aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0; - aud_param->hdmi_l_channel_state[2] = 2; - aud_param->hdmi_r_channel_state[2] = 2; hdmi->init = true;
return 0; @@ -439,6 +410,32 @@ void mtk_hdmi_power_off(struct mtk_hdmi *hdmi) mtk_hdmi_hw_make_reg_writable(hdmi, false); }
+void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi) +{ + mtk_hdmi_aud_enable_packet(hdmi, true); + hdmi->audio_enable = true; +} + +void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi) +{ + mtk_hdmi_aud_enable_packet(hdmi, false); + hdmi->audio_enable = false; +} + +int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi, + struct hdmi_audio_param *param) +{ + if (!hdmi->audio_enable) { + dev_err(hdmi->dev, "hdmi audio is in disable state!\n"); + return -EINVAL; + } + dev_dbg(hdmi->dev, "codec:%d, input:%d, channel:%d, fs:%d\n", + param->aud_codec, param->aud_input_type, + param->aud_input_chan_type, param->codec_params.sample_rate); + memcpy(&hdmi->aud_param, param, sizeof(*param)); + return mtk_hdmi_aud_output_config(hdmi, &hdmi->mode); +} + int mtk_hdmi_output_set_display_mode(struct mtk_hdmi *hdmi, struct drm_display_mode *mode) { diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.h b/drivers/gpu/drm/mediatek/mtk_hdmi.h index 9403915..832f238 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.h +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.h @@ -19,6 +19,7 @@ #include <linux/io.h> #include <linux/kernel.h> #include <linux/types.h> +#include <sound/hdmi-codec.h>
struct clk; struct device; @@ -144,15 +145,12 @@ enum hdmi_aud_channel_swap_type {
struct hdmi_audio_param { enum hdmi_audio_coding_type aud_codec; - enum hdmi_audio_sample_frequency aud_hdmi_fs; enum hdmi_audio_sample_size aud_sampe_size; enum hdmi_aud_input_type aud_input_type; enum hdmi_aud_i2s_fmt aud_i2s_fmt; enum hdmi_aud_mclk aud_mclk; - enum hdmi_aud_iec_frame_rate iec_frame_fs; enum hdmi_aud_channel_type aud_input_chan_type; - u8 hdmi_l_channel_state[6]; - u8 hdmi_r_channel_state[6]; + struct hdmi_codec_params codec_params; };
struct mtk_hdmi { @@ -201,6 +199,10 @@ int mtk_hdmi_output_set_display_mode(struct mtk_hdmi *hdmi, struct drm_display_mode *mode); void mtk_hdmi_power_on(struct mtk_hdmi *hdmi); void mtk_hdmi_power_off(struct mtk_hdmi *hdmi); +void mtk_hdmi_audio_enable(struct mtk_hdmi *hctx); +void mtk_hdmi_audio_disable(struct mtk_hdmi *hctx); +int mtk_hdmi_audio_set_param(struct mtk_hdmi *hctx, + struct hdmi_audio_param *param); #if defined(CONFIG_DEBUG_FS) int mtk_drm_hdmi_debugfs_init(struct mtk_hdmi *hdmi); void mtk_drm_hdmi_debugfs_exit(struct mtk_hdmi *hdmi); diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c b/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c index ea4e35f..6acbe77 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c @@ -395,90 +395,18 @@ void mtk_hdmi_hw_aud_set_input_type(struct mtk_hdmi *hdmi, }
void mtk_hdmi_hw_aud_set_channel_status(struct mtk_hdmi *hdmi, - u8 *l_chan_status, u8 *r_chan_status, - enum hdmi_audio_sample_frequency - aud_hdmi_fs) -{ - u8 l_status[5]; - u8 r_status[5]; - u8 val = 0; - - l_status[0] = l_chan_status[0]; - l_status[1] = l_chan_status[1]; - l_status[2] = l_chan_status[2]; - r_status[0] = r_chan_status[0]; - r_status[1] = r_chan_status[1]; - r_status[2] = r_chan_status[2]; - - l_status[0] &= ~0x02; - r_status[0] &= ~0x02; - - val = l_chan_status[3] & 0xf0; - switch (aud_hdmi_fs) { - case HDMI_AUDIO_SAMPLE_FREQUENCY_32000: - val |= 0x03; - break; - case HDMI_AUDIO_SAMPLE_FREQUENCY_44100: - break; - case HDMI_AUDIO_SAMPLE_FREQUENCY_88200: - val |= 0x08; - break; - case HDMI_AUDIO_SAMPLE_FREQUENCY_96000: - val |= 0x0a; - break; - case HDMI_AUDIO_SAMPLE_FREQUENCY_48000: - val |= 0x02; - break; - default: - val |= 0x02; - break; - } - l_status[3] = val; - r_status[3] = val; - - val = l_chan_status[4]; - val |= ((~(l_status[3] & 0x0f)) << 4); - l_status[4] = val; - r_status[4] = val; - - val = l_status[0]; - mtk_hdmi_write(hdmi, GRL_I2S_C_STA0, val); - mtk_hdmi_write(hdmi, GRL_L_STATUS_0, val); - - val = r_status[0]; - mtk_hdmi_write(hdmi, GRL_R_STATUS_0, val); - - val = l_status[1]; - mtk_hdmi_write(hdmi, GRL_I2S_C_STA1, val); - mtk_hdmi_write(hdmi, GRL_L_STATUS_1, val); - - val = r_status[1]; - mtk_hdmi_write(hdmi, GRL_R_STATUS_1, val); - - val = l_status[2]; - mtk_hdmi_write(hdmi, GRL_I2S_C_STA2, val); - mtk_hdmi_write(hdmi, GRL_L_STATUS_2, val); - - val = r_status[2]; - mtk_hdmi_write(hdmi, GRL_R_STATUS_2, val); - - val = l_status[3]; - mtk_hdmi_write(hdmi, GRL_I2S_C_STA3, val); - mtk_hdmi_write(hdmi, GRL_L_STATUS_3, val); - - val = r_status[3]; - mtk_hdmi_write(hdmi, GRL_R_STATUS_3, val); - - val = l_status[4]; - mtk_hdmi_write(hdmi, GRL_I2S_C_STA4, val); - mtk_hdmi_write(hdmi, GRL_L_STATUS_4, val); - - val = r_status[4]; - mtk_hdmi_write(hdmi, GRL_R_STATUS_4, val); + u8 *channel_status) +{ + int i;
- for (val = 0; val < 19; val++) { - mtk_hdmi_write(hdmi, GRL_L_STATUS_5 + val * 4, 0); - mtk_hdmi_write(hdmi, GRL_R_STATUS_5 + val * 4, 0); + for (i = 0; i < 5; i++) { + mtk_hdmi_write(hdmi, GRL_I2S_C_STA0 + i * 4, channel_status[i]); + mtk_hdmi_write(hdmi, GRL_L_STATUS_0 + i * 4, channel_status[i]); + mtk_hdmi_write(hdmi, GRL_R_STATUS_0 + i * 4, channel_status[i]); + } + for (; i < 24; i++) { + mtk_hdmi_write(hdmi, GRL_L_STATUS_0 + i * 4, 0); + mtk_hdmi_write(hdmi, GRL_R_STATUS_0 + i * 4, 0); } }
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_hw.h b/drivers/gpu/drm/mediatek/mtk_hdmi_hw.h index 9013219..a3e1bbc 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi_hw.h +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_hw.h @@ -46,9 +46,7 @@ void mtk_hdmi_hw_aud_set_i2s_chan_num(struct mtk_hdmi *hdmi, void mtk_hdmi_hw_aud_set_input_type(struct mtk_hdmi *hdmi, enum hdmi_aud_input_type input_type); void mtk_hdmi_hw_aud_set_channel_status(struct mtk_hdmi *hdmi, - u8 *l_chan_status, u8 *r_chan_staus, - enum hdmi_audio_sample_frequency - aud_hdmi_fs); + u8 *channel_status); void mtk_hdmi_hw_aud_src_enable(struct mtk_hdmi *hdmi, bool enable); void mtk_hdmi_hw_aud_set_mclk(struct mtk_hdmi *hdmi, enum hdmi_aud_mclk mclk); void mtk_hdmi_hw_aud_src_off(struct mtk_hdmi *hdmi);