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media: i2c: rk628: fix audio fifo underflow or overflow when working for audio with high jitter

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Signed-off-by: Shunhua Lan <lsh@rock-chips.com>
Change-Id: I418d691381f6f8c389a190ac96a2587b0e2f22fd
This commit is contained in:
Shunhua Lan
2024-10-12 17:04:56 +08:00
committed by Tao Huang
parent 71bb2b36f6
commit fa24640896
1 changed files with 21 additions and 13 deletions
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34
drivers/media/i2c/rk628/rk628_hdmirx.c
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@@ -18,7 +18,7 @@
#include "rk628_cru.h"
#include "rk628_hdmirx.h"
#define INIT_FIFO_STATE 64
#define INIT_FIFO_STATE 128
#define DEFAULT_AUDIO_CLK 5644800
@@ -395,8 +395,8 @@ static void rk628_hdmirx_audio_clk_ppm_inc(struct rk628_audioinfo *aif, int ppm)
delta = div_u64(((uint64_t)rate * ppm + 500000), 1000000);
delta *= inc;
rate += delta;
dev_dbg(aif->dev, "%s: %u to %u(delta:%d)\n",
__func__, aif->audio_state.hdmirx_aud_clkrate, rate, delta);
dev_dbg(aif->dev, "%s: %u to %u(delta:%d ppm:%d)\n",
__func__, aif->audio_state.hdmirx_aud_clkrate, rate, delta, ppm);
rk628_clk_set_rate(aif->rk628, CGU_CLK_HDMIRX_AUD, rate);
aif->audio_state.hdmirx_aud_clkrate = rate;
}
@@ -449,19 +449,27 @@ static int rk628_hdmirx_audio_clk_adjust(struct rk628_audioinfo *aif,
{
int shedule_time = 500;
int ppm = 10;
uint32_t offset_abs;
if (total_offset > 16 && single_offset > 0)
offset_abs = abs(total_offset);
if (offset_abs > 200) {
ppm += 200;
shedule_time -= 100;
}
if (offset_abs > 100) {
ppm += 200;
shedule_time -= 100;
}
if (offset_abs > 32) {
ppm += 20;
shedule_time -= 100;
}
if (offset_abs > 16)
ppm += 20;
if (total_offset > 16 && single_offset > 0) {
rk628_hdmirx_audio_clk_ppm_inc(aif, ppm);
else if (total_offset < -16 && single_offset < 0)
} else if (total_offset < -16 && single_offset < 0) {
rk628_hdmirx_audio_clk_ppm_inc(aif, -ppm);
if (total_offset >= 20) {
shedule_time = 200;
} else if (total_offset >= 50) {
shedule_time = 100;
dev_dbg(aif->dev, "%s: decrease shedule time to %d\n", __func__, shedule_time);
} else if (ppm >= 80) {
shedule_time = 50;
dev_dbg(aif->dev, "%s: decrease shedule time to %d\n", __func__, shedule_time);
}
if (!aif->audio_present)
shedule_time = 50;