diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0892-drm-vc4-add-iec958-controls-to-vc4_hdmi.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0892-drm-vc4-add-iec958-controls-to-vc4_hdmi.patch | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0892-drm-vc4-add-iec958-controls-to-vc4_hdmi.patch b/target/linux/bcm27xx/patches-5.4/950-0892-drm-vc4-add-iec958-controls-to-vc4_hdmi.patch new file mode 100644 index 0000000000..bc5aacad88 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0892-drm-vc4-add-iec958-controls-to-vc4_hdmi.patch @@ -0,0 +1,119 @@ +From 209a350d81cded4ac83c31088d9e941c6497eb0e Mon Sep 17 00:00:00 2001 +From: Matthias Reichl <hias@horus.com> +Date: Tue, 17 Mar 2020 12:12:22 +0100 +Subject: [PATCH] drm/vc4: add iec958 controls to vc4_hdmi + +Although vc4 get an IEC958 formatted stream passed in from userspace +the driver needs the info from the channel status bits to properly +set up the hardware, eg for HBR passthrough. + +Add iec958 controls so the channel status bits can be passed in +from userspace. + +Signed-off-by: Matthias Reichl <hias@horus.com> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 60 ++++++++++++++++++++++++++++++++++ + drivers/gpu/drm/vc4/vc4_hdmi.h | 2 ++ + 2 files changed, 62 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -43,6 +43,7 @@ + #include <linux/pm_runtime.h> + #include <linux/rational.h> + #include <linux/reset.h> ++#include <sound/asoundef.h> + #include <sound/dmaengine_pcm.h> + #include <sound/pcm_drm_eld.h> + #include <sound/pcm_params.h> +@@ -1106,6 +1107,47 @@ static int vc4_hdmi_audio_eld_ctl_get(st + return 0; + } + ++static int vc4_spdif_info(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_info *uinfo) ++{ ++ uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; ++ uinfo->count = 1; ++ return 0; ++} ++ ++static int vc4_spdif_playback_get(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); ++ struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component); ++ ++ memcpy(ucontrol->value.iec958.status, vc4_hdmi->audio.iec_status, ++ sizeof(vc4_hdmi->audio.iec_status)); ++ ++ return 0; ++} ++ ++static int vc4_spdif_playback_put(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); ++ struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component); ++ ++ memcpy(vc4_hdmi->audio.iec_status, ucontrol->value.iec958.status, ++ sizeof(vc4_hdmi->audio.iec_status)); ++ ++ return 0; ++} ++ ++static int vc4_spdif_mask_get(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ memset(ucontrol->value.iec958.status, 0xff, ++ FIELD_SIZEOF(struct vc4_hdmi_audio, iec_status)); ++ ++ return 0; ++} ++ + static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = { + { + .access = SNDRV_CTL_ELEM_ACCESS_READ | +@@ -1115,6 +1157,19 @@ static const struct snd_kcontrol_new vc4 + .info = vc4_hdmi_audio_eld_ctl_info, + .get = vc4_hdmi_audio_eld_ctl_get, + }, ++ { ++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, ++ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), ++ .info = vc4_spdif_info, ++ .get = vc4_spdif_playback_get, ++ .put = vc4_spdif_playback_put, ++ }, ++ { ++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, ++ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK), ++ .info = vc4_spdif_info, ++ .get = vc4_spdif_mask_get, ++ }, + }; + + static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = { +@@ -1235,6 +1290,11 @@ static int vc4_hdmi_audio_init(struct vc + vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + vc4_hdmi->audio.dma_data.maxburst = 2; + ++ vc4_hdmi->audio.iec_status[0] = IEC958_AES0_CON_NOT_COPYRIGHT; ++ vc4_hdmi->audio.iec_status[1] = ++ IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER; ++ vc4_hdmi->audio.iec_status[3] = IEC958_AES3_CON_FS_48000; ++ + ret = devm_snd_dmaengine_pcm_register(dev, &pcm_conf, 0); + if (ret) { + dev_err(dev, "Could not register PCM component: %d\n", ret); +--- a/drivers/gpu/drm/vc4/vc4_hdmi.h ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.h +@@ -115,6 +115,8 @@ struct vc4_hdmi_audio { + struct snd_pcm_substream *substream; + + bool streaming; ++ ++ unsigned char iec_status[4]; + }; + + /* General HDMI hardware state. */ |