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drm/bridge: dw-hdmi: move audio channel setup out of ahb

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Part of the channel count setup done in dw-hdmi ahb should
actually be done whatever the interface providing the data.

Let's move it to dw-hdmi driver instead.

Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190812120726.1528-3-jbrunet@baylibre.com
This commit is contained in:
Jerome Brunet 2019-08-12 14:07:20 +02:00 committed by Neil Armstrong
parent 8067f62bcc
commit 2a2a3d2ff7
3 changed files with 38 additions and 16 deletions
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20
drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
View File

@ -63,10 +63,6 @@ enum {
HDMI_REVISION_ID = 0x0001,
HDMI_IH_AHBDMAAUD_STAT0 = 0x0109,
HDMI_IH_MUTE_AHBDMAAUD_STAT0 = 0x0189,
HDMI_FC_AUDICONF2 = 0x1027,
HDMI_FC_AUDSCONF = 0x1063,
HDMI_FC_AUDSCONF_LAYOUT1 = 1 << 0,
HDMI_FC_AUDSCONF_LAYOUT0 = 0 << 0,
HDMI_AHB_DMA_CONF0 = 0x3600,
HDMI_AHB_DMA_START = 0x3601,
HDMI_AHB_DMA_STOP = 0x3602,
@ -403,7 +399,7 @@ static int dw_hdmi_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dw_hdmi *dw = substream->private_data;
u8 threshold, conf0, conf1, layout, ca;
u8 threshold, conf0, conf1, ca;
/* Setup as per 3.0.5 FSL 4.1.0 BSP */
switch (dw->revision) {
@ -434,20 +430,12 @@ static int dw_hdmi_prepare(struct snd_pcm_substream *substream)
conf1 = default_hdmi_channel_config[runtime->channels - 2].conf1;
ca = default_hdmi_channel_config[runtime->channels - 2].ca;
/*
* For >2 channel PCM audio, we need to select layout 1
* and set an appropriate channel map.
*/
if (runtime->channels > 2)
layout = HDMI_FC_AUDSCONF_LAYOUT1;
else
layout = HDMI_FC_AUDSCONF_LAYOUT0;
writeb_relaxed(threshold, dw->data.base + HDMI_AHB_DMA_THRSLD);
writeb_relaxed(conf0, dw->data.base + HDMI_AHB_DMA_CONF0);
writeb_relaxed(conf1, dw->data.base + HDMI_AHB_DMA_CONF1);
writeb_relaxed(layout, dw->data.base + HDMI_FC_AUDSCONF);
writeb_relaxed(ca, dw->data.base + HDMI_FC_AUDICONF2);
dw_hdmi_set_channel_count(dw->data.hdmi, runtime->channels);
dw_hdmi_set_channel_allocation(dw->data.hdmi, ca);
switch (runtime->format) {
case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:

32
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
View File

@ -645,6 +645,38 @@ void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
}
EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
void dw_hdmi_set_channel_count(struct dw_hdmi *hdmi, unsigned int cnt)
{
u8 layout;
mutex_lock(&hdmi->audio_mutex);
/*
* For >2 channel PCM audio, we need to select layout 1
* and set an appropriate channel map.
*/
if (cnt > 2)
layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT1;
else
layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT0;
hdmi_modb(hdmi, layout, HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_MASK,
HDMI_FC_AUDSCONF);
mutex_unlock(&hdmi->audio_mutex);
}
EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_count);
void dw_hdmi_set_channel_allocation(struct dw_hdmi *hdmi, unsigned int ca)
{
mutex_lock(&hdmi->audio_mutex);
hdmi_writeb(hdmi, ca, HDMI_FC_AUDICONF2);
mutex_unlock(&hdmi->audio_mutex);
}
EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_allocation);
static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi, bool enable)
{
if (enable)

2
include/drm/bridge/dw_hdmi.h
View File

@ -155,6 +155,8 @@ void dw_hdmi_resume(struct dw_hdmi *hdmi);
void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense);
void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);
void dw_hdmi_set_channel_count(struct dw_hdmi *hdmi, unsigned int cnt);
void dw_hdmi_set_channel_allocation(struct dw_hdmi *hdmi, unsigned int ca);
void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi);