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Date: Fri, 5 Aug 2022 18:14:59 +0800
From: Bo-Chen Chen <rex-bc.chen@...iatek.com>
To: <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>,
<daniel@...ll.ch>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <mripard@...nel.org>,
<tzimmermann@...e.de>, <matthias.bgg@...il.com>, <deller@....de>,
<airlied@...ux.ie>
CC: <msp@...libre.com>, <granquet@...libre.com>,
<jitao.shi@...iatek.com>, <wenst@...omium.org>,
<angelogioacchino.delregno@...labora.com>, <ck.hu@...iatek.com>,
<liangxu.xu@...iatek.com>, <dri-devel@...ts.freedesktop.org>,
<linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-fbdev@...r.kernel.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>,
Bo-Chen Chen <rex-bc.chen@...iatek.com>
Subject: [PATCH v16 8/8] drm/mediatek: Use cached audio config when changing resolution
When the audio is playing, we need to use the original configuration to
set the audio instead of using new configuration. Therefore, use the
cached audio configuration during a resolution switch to avoid loss of
sound.
Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
Signed-off-by: Bo-Chen Chen <rex-bc.chen@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
drivers/gpu/drm/mediatek/mtk_dp.c | 108 +++++-------------------------
1 file changed, 17 insertions(+), 91 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 3efac9920304..e725e3104147 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -45,18 +45,6 @@
#define MTK_DP_TRAIN_DOWNSCALE_RETRY 8
#define MTK_DP_VERSION 0x11
-#define MTK_DP_CEA_SAD_FREQ_32KHZ BIT(0)
-#define MTK_DP_CEA_SAD_FREQ_44KHZ BIT(1)
-#define MTK_DP_CEA_SAD_FREQ_48KHZ BIT(2)
-#define MTK_DP_CEA_SAD_FREQ_88KHZ BIT(3)
-#define MTK_DP_CEA_SAD_FREQ_96KHZ BIT(4)
-#define MTK_DP_CEA_SAD_FREQ_176KHZ BIT(5)
-#define MTK_DP_CEA_SAD_FREQ_192KHZ BIT(6)
-
-#define MTK_DP_CEA_SAD_UNCOMPRESSED_WORD_16BIT BIT(0)
-#define MTK_DP_CEA_SAD_UNCOMPRESSED_WORD_20BIT BIT(1)
-#define MTK_DP_CEA_SAD_UNCOMPRESSED_WORD_24BIT BIT(2)
-
struct mtk_dp_train_info {
bool tps3;
bool tps4;
@@ -106,7 +94,7 @@ struct mtk_dp_info {
struct videomode vm;
u8 frame_rate;
u32 pix_rate_khz;
- struct mtk_dp_audio_cfg audio_caps;
+ struct mtk_dp_audio_cfg audio_cur_cfg;
};
struct dp_cal_data {
@@ -413,48 +401,6 @@ static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable)
4 << PGEN_PATTERN_SEL_SHIFT, PGEN_PATTERN_SEL_MASK);
}
-static int mtk_dp_cea_sad_get_sample_rate(const struct cea_sad *sad)
-{
- switch (sad->freq) {
- case MTK_DP_CEA_SAD_FREQ_32KHZ:
- return 32000;
- case MTK_DP_CEA_SAD_FREQ_44KHZ:
- return 44100;
- case MTK_DP_CEA_SAD_FREQ_48KHZ:
- return 48000;
- case MTK_DP_CEA_SAD_FREQ_88KHZ:
- return 88200;
- case MTK_DP_CEA_SAD_FREQ_96KHZ:
- return 96000;
- case MTK_DP_CEA_SAD_FREQ_176KHZ:
- return 176400;
- case MTK_DP_CEA_SAD_FREQ_192KHZ:
- return 192000;
- default:
- return -EINVAL;
- }
-}
-
-static int mtk_dp_cea_sad_get_uncompressed_word_length(const struct cea_sad *sad)
-{
- if (sad->format != HDMI_AUDIO_CODING_TYPE_PCM) {
- pr_err("Unable to get the uncompressed word length for format: %u\n",
- sad->format);
- return -EINVAL;
- }
-
- switch (sad->byte2) {
- case MTK_DP_CEA_SAD_UNCOMPRESSED_WORD_16BIT:
- return 16;
- case MTK_DP_CEA_SAD_UNCOMPRESSED_WORD_20BIT:
- return 20;
- case MTK_DP_CEA_SAD_UNCOMPRESSED_WORD_24BIT:
- return 24;
- default:
- return -EINVAL;
- }
-}
-
static void mtk_dp_audio_setup_channels(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
@@ -1859,9 +1805,7 @@ static bool mtk_dp_edid_parse_audio_capabilities(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
struct cea_sad *sads;
- int sad_count;
- int i;
- bool ret = false;
+ int ret;
if (!mtk_dp->data->audio_supported)
return false;
@@ -1872,36 +1816,16 @@ static bool mtk_dp_edid_parse_audio_capabilities(struct mtk_dp *mtk_dp,
dev_err(mtk_dp->dev, "EDID not found!\n");
return false;
}
- sad_count = drm_edid_to_sad(mtk_dp->edid, &sads);
- mutex_unlock(&mtk_dp->edid_lock);
- if (sad_count <= 0) {
+ ret = drm_edid_to_sad(mtk_dp->edid, &sads);
+ mutex_unlock(&mtk_dp->edid_lock);
+ if (ret <= 0) {
drm_info(mtk_dp->drm_dev, "The SADs is NULL\n");
return false;
}
-
- for (i = 0; i < sad_count; i++) {
- int sample_rate, word_length;
-
- /* Only PCM supported at the moment */
- if (sads[i].format != HDMI_AUDIO_CODING_TYPE_PCM)
- continue;
-
- sample_rate = mtk_dp_cea_sad_get_sample_rate(&sads[i]);
- word_length =
- mtk_dp_cea_sad_get_uncompressed_word_length(&sads[i]);
- if (sample_rate <= 0 || word_length <= 0)
- continue;
-
- cfg->channels = sads[i].channels;
- cfg->word_length_bits = word_length;
- cfg->sample_rate = sample_rate;
- ret = true;
- break;
- }
kfree(sads);
- return ret;
+ return true;
}
static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp)
@@ -2070,13 +1994,13 @@ static int mtk_dp_training(struct mtk_dp *mtk_dp)
mtk_dp->audio_enable =
mtk_dp_edid_parse_audio_capabilities(mtk_dp,
- &mtk_dp->info.audio_caps);
+ &mtk_dp->info.audio_cur_cfg);
if (mtk_dp->audio_enable) {
- mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_caps);
+ mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
mtk_dp_audio_mute(mtk_dp, false);
} else {
- memset(&mtk_dp->info.audio_caps, 0,
- sizeof(mtk_dp->info.audio_caps));
+ memset(&mtk_dp->info.audio_cur_cfg, 0,
+ sizeof(mtk_dp->info.audio_cur_cfg));
}
return 0;
@@ -2442,6 +2366,9 @@ static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
if (mtk_dp_plug_state(mtk_dp)) {
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
usleep_range(2000, 3000);
+ } else {
+ memset(&mtk_dp->info.audio_cur_cfg, 0,
+ sizeof(mtk_dp->info.audio_cur_cfg));
}
mtk_dp_video_mute(mtk_dp, true);
@@ -2641,18 +2568,17 @@ static int mtk_dp_audio_hw_params(struct device *dev, void *data,
struct hdmi_codec_params *params)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
- struct mtk_dp_audio_cfg cfg;
if (!mtk_dp->enabled) {
dev_err(mtk_dp->dev, "%s, DP is not ready!\n", __func__);
return -ENODEV;
}
- cfg.channels = params->cea.channels;
- cfg.sample_rate = params->sample_rate;
- cfg.word_length_bits = 24;
+ mtk_dp->info.audio_cur_cfg.channels = params->cea.channels;
+ mtk_dp->info.audio_cur_cfg.sample_rate = params->sample_rate;
+ mtk_dp->info.audio_cur_cfg.word_length_bits = 24;
- mtk_dp_audio_setup(mtk_dp, &cfg);
+ mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
return 0;
}
--
2.18.0
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