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Message-Id: <20210525132354.297468-8-maxime@cerno.tech>
Date: Tue, 25 May 2021 15:23:49 +0200
From: Maxime Ripard <maxime@...no.tech>
To: Jaroslav Kysela <perex@...ex.cz>, Mark Brown <broonie@...nel.org>,
dri-devel@...ts.freedesktop.org,
Daniel Vetter <daniel.vetter@...el.com>,
David Airlie <airlied@...ux.ie>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
Maxime Ripard <maxime@...no.tech>,
Liam Girdwood <lgirdwood@...il.com>,
Takashi Iwai <tiwai@...e.com>
Cc: devicetree@...r.kernel.org,
Dave Stevenson <dave.stevenson@...pberrypi.com>,
Phil Elwell <phil@...pberrypi.com>,
Tim Gover <tim.gover@...pberrypi.com>,
Dom Cobley <dom@...pberrypi.com>, linux-doc@...r.kernel.org,
Eric Anholt <eric@...olt.net>,
Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
Maxime Ripard <mripard@...nel.org>,
Nicolas Saenz Julienne <nsaenz@...nel.org>,
bcm-kernel-feedback-list@...adcom.com,
linux-arm-kernel@...ts.infradead.org,
Daniel Vetter <daniel@...ll.ch>,
linux-rpi-kernel@...ts.infradead.org,
Jonathan Corbet <corbet@....net>,
Rob Herring <robh+dt@...nel.org>,
Dom Cobley <popcornmix@...il.com>
Subject: [PATCH v2 07/12] drm/vc4: hdmi: Set HDMI_MAI_FMT
From: Dom Cobley <popcornmix@...il.com>
The hardware uses this for generating the right audio
data island packets when using formats other than PCM
Signed-off-by: Dom Cobley <popcornmix@...il.com>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 48 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/vc4/vc4_regs.h | 30 +++++++++++++++++++++
2 files changed, 78 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 212b5df11d73..2c2f21ee0451 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1181,6 +1181,44 @@ static void vc4_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
vc4_hdmi->audio.substream = NULL;
}
+static int sample_rate_to_mai_fmt(int samplerate)
+{
+ switch (samplerate) {
+ case 8000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_8000;
+ case 11025:
+ return VC4_HDMI_MAI_SAMPLE_RATE_11025;
+ case 12000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_12000;
+ case 16000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_16000;
+ case 22050:
+ return VC4_HDMI_MAI_SAMPLE_RATE_22050;
+ case 24000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_24000;
+ case 32000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_32000;
+ case 44100:
+ return VC4_HDMI_MAI_SAMPLE_RATE_44100;
+ case 48000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_48000;
+ case 64000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_64000;
+ case 88200:
+ return VC4_HDMI_MAI_SAMPLE_RATE_88200;
+ case 96000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_96000;
+ case 128000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_128000;
+ case 176400:
+ return VC4_HDMI_MAI_SAMPLE_RATE_176400;
+ case 192000:
+ return VC4_HDMI_MAI_SAMPLE_RATE_192000;
+ default:
+ return VC4_HDMI_MAI_SAMPLE_RATE_NOT_INDICATED;
+ }
+}
+
/* HDMI audio codec callbacks */
static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
@@ -1191,6 +1229,8 @@ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
struct device *dev = &vc4_hdmi->pdev->dev;
u32 audio_packet_config, channel_mask;
u32 channel_map;
+ u32 mai_audio_format;
+ u32 mai_sample_rate;
if (substream != vc4_hdmi->audio.substream)
return -EINVAL;
@@ -1211,6 +1251,14 @@ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
+ mai_sample_rate = sample_rate_to_mai_fmt(vc4_hdmi->audio.samplerate);
+ mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM;
+ HDMI_WRITE(HDMI_MAI_FMT,
+ VC4_SET_FIELD(mai_sample_rate,
+ VC4_HDMI_MAI_FORMAT_SAMPLE_RATE) |
+ VC4_SET_FIELD(mai_audio_format,
+ VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT));
+
/* The B frame identifier should match the value used by alsa-lib (8) */
audio_packet_config =
VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
diff --git a/drivers/gpu/drm/vc4/vc4_regs.h b/drivers/gpu/drm/vc4/vc4_regs.h
index be2c32a519b3..489f921ef44d 100644
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -516,6 +516,36 @@
# define VC4_HDMI_AUDIO_PACKET_CEA_MASK_MASK VC4_MASK(7, 0)
# define VC4_HDMI_AUDIO_PACKET_CEA_MASK_SHIFT 0
+# define VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT_MASK VC4_MASK(23, 16)
+# define VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT_SHIFT 16
+
+enum {
+ VC4_HDMI_MAI_FORMAT_PCM = 2,
+ VC4_HDMI_MAI_FORMAT_HBR = 200,
+};
+
+# define VC4_HDMI_MAI_FORMAT_SAMPLE_RATE_MASK VC4_MASK(15, 8)
+# define VC4_HDMI_MAI_FORMAT_SAMPLE_RATE_SHIFT 8
+
+enum {
+ VC4_HDMI_MAI_SAMPLE_RATE_NOT_INDICATED = 0,
+ VC4_HDMI_MAI_SAMPLE_RATE_8000 = 1,
+ VC4_HDMI_MAI_SAMPLE_RATE_11025 = 2,
+ VC4_HDMI_MAI_SAMPLE_RATE_12000 = 3,
+ VC4_HDMI_MAI_SAMPLE_RATE_16000 = 4,
+ VC4_HDMI_MAI_SAMPLE_RATE_22050 = 5,
+ VC4_HDMI_MAI_SAMPLE_RATE_24000 = 6,
+ VC4_HDMI_MAI_SAMPLE_RATE_32000 = 7,
+ VC4_HDMI_MAI_SAMPLE_RATE_44100 = 8,
+ VC4_HDMI_MAI_SAMPLE_RATE_48000 = 9,
+ VC4_HDMI_MAI_SAMPLE_RATE_64000 = 10,
+ VC4_HDMI_MAI_SAMPLE_RATE_88200 = 11,
+ VC4_HDMI_MAI_SAMPLE_RATE_96000 = 12,
+ VC4_HDMI_MAI_SAMPLE_RATE_128000 = 13,
+ VC4_HDMI_MAI_SAMPLE_RATE_176400 = 14,
+ VC4_HDMI_MAI_SAMPLE_RATE_192000 = 15,
+};
+
# define VC4_HDMI_RAM_PACKET_ENABLE BIT(16)
/* When set, the CTS_PERIOD counts based on MAI bus sync pulse instead
--
2.31.1
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