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drm/vc4: hdmi: Add audio-related callbacks

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The audio configuration has changed for the BCM2711, with notably a
different parent clock and a different channel configuration.

Make that modular to be able to support the BCM2711.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://patchwork.freedesktop.org/patch/msgid/85a8ca721c2d800be758c55870cea98536749680.1599120059.git-series.maxime@cerno.tech
This commit is contained in:
Dave Stevenson 2020-09-03 10:01:40 +02:00 committed by Maxime Ripard
parent b9b8bac60a
commit 632ee3aa87
No known key found for this signature in database
GPG Key ID: E3EF0D6F671851C5
2 changed files with 21 additions and 8 deletions
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25
drivers/gpu/drm/vc4/vc4_hdmi.c
View File

@ -611,10 +611,22 @@ static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
.enable = vc4_hdmi_encoder_enable,
};
static u32 vc4_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask)
{
int i;
u32 channel_map = 0;
for (i = 0; i < 8; i++) {
if (channel_mask & BIT(i))
channel_map |= i << (3 * i);
}
return channel_map;
}
/* HDMI audio codec callbacks */
static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi)
{
u32 hsm_clock = clk_get_rate(vc4_hdmi->hsm_clock);
u32 hsm_clock = clk_get_rate(vc4_hdmi->audio_clock);
unsigned long n, m;
rational_best_approximation(hsm_clock, vc4_hdmi->audio.samplerate,
@ -733,7 +745,7 @@ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
struct device *dev = &vc4_hdmi->pdev->dev;
u32 audio_packet_config, channel_mask;
u32 channel_map, i;
u32 channel_map;
if (substream != vc4_hdmi->audio.substream)
return -EINVAL;
@ -785,12 +797,7 @@ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
VC4_HDMI_MAI_CONFIG_BIT_REVERSE |
VC4_SET_FIELD(channel_mask, VC4_HDMI_MAI_CHANNEL_MASK));
channel_map = 0;
for (i = 0; i < 8; i++) {
if (channel_mask & BIT(i))
channel_map |= i << (3 * i);
}
channel_map = vc4_hdmi->variant->channel_map(vc4_hdmi, channel_mask);
HDMI_WRITE(HDMI_MAI_CHANNEL_MAP, channel_map);
HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
vc4_hdmi_set_n_cts(vc4_hdmi);
@ -1342,6 +1349,7 @@ static int vc4_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi)
DRM_ERROR("Failed to get HDMI state machine clock\n");
return PTR_ERR(vc4_hdmi->hsm_clock);
}
vc4_hdmi->audio_clock = vc4_hdmi->hsm_clock;
return 0;
}
@ -1507,6 +1515,7 @@ static const struct vc4_hdmi_variant bcm2835_variant = {
.phy_disable = vc4_hdmi_phy_disable,
.phy_rng_enable = vc4_hdmi_phy_rng_enable,
.phy_rng_disable = vc4_hdmi_phy_rng_disable,
.channel_map = vc4_hdmi_channel_map,
};
static const struct of_device_id vc4_hdmi_dt_match[] = {

4
drivers/gpu/drm/vc4/vc4_hdmi.h
View File

@ -72,6 +72,9 @@ struct vc4_hdmi_variant {
/* Callback to disable the RNG in the PHY */
void (*phy_rng_disable)(struct vc4_hdmi *vc4_hdmi);
/* Callback to get channel map */
u32 (*channel_map)(struct vc4_hdmi *vc4_hdmi, u32 channel_mask);
};
/* HDMI audio information */
@ -112,6 +115,7 @@ struct vc4_hdmi {
struct clk *pixel_clock;
struct clk *hsm_clock;
struct clk *audio_clock;
struct debugfs_regset32 hdmi_regset;
struct debugfs_regset32 hd_regset;