diff options
Diffstat (limited to 'drivers/gpu/drm/imx/hdp/imx-hdp-audio.c')
| -rw-r--r-- | drivers/gpu/drm/imx/hdp/imx-hdp-audio.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/hdp/imx-hdp-audio.c b/drivers/gpu/drm/imx/hdp/imx-hdp-audio.c new file mode 100644 index 000000000000..dace3cc1e27d --- /dev/null +++ b/drivers/gpu/drm/imx/hdp/imx-hdp-audio.c @@ -0,0 +1,235 @@ +/* + * Copyright 2018 NXP + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk.h> +#include <linux/kthread.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/component.h> +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/irq.h> +#include <linux/of_device.h> +#include <sound/hdmi-codec.h> + +#include "imx-hdp.h" +#include "imx-hdmi.h" +#include "imx-dp.h" +#include "../imx-drm.h" + +static u32 TMDS_rate_table[7] = { +25200, 27000, 54000, 74250, 148500, 297000, 594000, +}; + +static u32 N_table_32k[8] = { +/*25200, 27000, 54000, 74250, 148500, 297000, 594000,*/ +4096, 4096, 4096, 4096, 4096, 3072, 3072, 4096, +}; + +static u32 N_table_44k[8] = { +6272, 6272, 6272, 6272, 6272, 4704, 9408, 6272, +}; + +static u32 N_table_48k[8] = { +6144, 6144, 6144, 6144, 6144, 5120, 6144, 6144, +}; + +static int select_N_index(u32 pclk) +{ + int i = 0; + + for (i = 0; i < 7; i++) { + if (pclk == TMDS_rate_table[i]) + break; + } + + if (i == 7) + DRM_WARN("pclkc %d is not supported!\n", pclk); + + return i; +} + +static void imx_hdmi_audio_avi_set(state_struct *state, + u32 channels) +{ + struct hdmi_audio_infoframe frame; + u8 buf[32]; + int ret; + + hdmi_audio_infoframe_init(&frame); + + frame.channels = channels; + frame.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM; + + ret = hdmi_audio_infoframe_pack(&frame, buf + 1, sizeof(buf) - 1); + if (ret < 0) { + DRM_ERROR("failed to pack audio infoframe: %d\n", ret); + return; + } + + buf[0] = 0; + + CDN_API_InfoframeSet(state, 1, sizeof(buf), + (u32 *)buf, HDMI_INFOFRAME_TYPE_AUDIO); +} + +static u32 imx_hdp_audio(struct imx_hdp *hdmi, AUDIO_TYPE type, u32 sample_rate, u32 channels, u32 width) +{ + AUDIO_FREQ freq; + AUDIO_WIDTH bits; + int ncts_n; + state_struct *state = &hdmi->state; + int idx_n = select_N_index(hdmi->video.cur_mode.clock); + + switch (sample_rate) { + case 32000: + freq = AUDIO_FREQ_32; + ncts_n = N_table_32k[idx_n]; + break; + case 44100: + freq = AUDIO_FREQ_44_1; + ncts_n = N_table_44k[idx_n]; + break; + case 48000: + freq = AUDIO_FREQ_48; + ncts_n = N_table_48k[idx_n]; + break; + case 88200: + freq = AUDIO_FREQ_88_2; + ncts_n = N_table_44k[idx_n] * 2; + break; + case 96000: + freq = AUDIO_FREQ_96; + ncts_n = N_table_48k[idx_n] * 2; + break; + case 176400: + freq = AUDIO_FREQ_176_4; + ncts_n = N_table_44k[idx_n] * 4; + break; + case 192000: + freq = AUDIO_FREQ_192; + ncts_n = N_table_48k[idx_n] * 4; + break; + default: + return -EINVAL; + } + + switch (width) { + case 16: + bits = AUDIO_WIDTH_16; + break; + case 24: + bits = AUDIO_WIDTH_24; + break; + case 32: + bits = AUDIO_WIDTH_32; + break; + default: + return -EINVAL; + } + + + CDN_API_AudioOff_blocking(state, type); + CDN_API_AudioAutoConfig_blocking(state, + type, + channels, + freq, + 0, + bits, + hdmi->audio_type, + ncts_n, + AUDIO_MUTE_MODE_UNMUTE); + + if (hdmi->audio_type == CDN_HDMITX_TYPHOON || + hdmi->audio_type == CDN_HDMITX_KIRAN) + imx_hdmi_audio_avi_set(state, channels); + return 0; +} + +/* + * HDMI audio codec callbacks + */ +static int imx_hdp_audio_hw_params(struct device *dev, void *data, + struct hdmi_codec_daifmt *daifmt, + struct hdmi_codec_params *params) +{ + struct imx_hdp *hdmi = dev_get_drvdata(dev); + 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; + + if (daifmt->fmt == HDMI_I2S) + imx_hdp_audio(hdmi, + AUDIO_TYPE_I2S, + params->sample_rate, + chan, + params->sample_width); + else if (daifmt->fmt == HDMI_SPDIF) + imx_hdp_audio(hdmi, + AUDIO_TYPE_SPIDIF_EXTERNAL, + params->sample_rate, + chan, + params->sample_width); + else + return -EINVAL; + + return 0; +} + +static void imx_hdp_audio_shutdown(struct device *dev, void *data) +{ + struct imx_hdp *hdmi = dev_get_drvdata(dev); + state_struct *state = &hdmi->state; + + CDN_API_InfoframeRemovePacket(state, 0x1, 0x84); +} + +static int imx_hdp_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len) +{ + struct imx_hdp *hdmi = dev_get_drvdata(dev); + + memcpy(buf, hdmi->connector.eld, min(sizeof(hdmi->connector.eld), len)); + + return 0; +} + +static const struct hdmi_codec_ops imx_hdp_audio_codec_ops = { + .hw_params = imx_hdp_audio_hw_params, + .audio_shutdown = imx_hdp_audio_shutdown, + .get_eld = imx_hdp_audio_get_eld, +}; + +void imx_hdp_register_audio_driver(struct device *dev) +{ + struct hdmi_codec_pdata codec_data = { + .ops = &imx_hdp_audio_codec_ops, + .max_i2s_channels = 8, + .i2s = 1, + }; + struct platform_device *pdev; + + pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, + 1, &codec_data, + sizeof(codec_data)); + if (IS_ERR(pdev)) + return; + + DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME); +} + + |