summaryrefslogtreecommitdiffstats
path: root/firmware/target/mips/ingenic_jz47xx
diff options
context:
space:
mode:
authorSolomon Peachy <pizza@shaftnet.org>2020-09-04 15:55:11 -0400
committerSolomon Peachy <pizza@shaftnet.org>2020-09-04 15:57:00 -0400
commit90a4f28c2799e3ae5e873f1f34b1e4adb59f77cb (patch)
tree119dc1bffbfb56aa3d0d4af8a2adba74db7951d3 /firmware/target/mips/ingenic_jz47xx
parent5f5e44f593f3c33beb813e8ae2948bc96d49681d (diff)
downloadrockbox-90a4f28c2799e3ae5e873f1f34b1e4adb59f77cb.tar.gz
rockbox-90a4f28c2799e3ae5e873f1f34b1e4adb59f77cb.tar.bz2
rockbox-90a4f28c2799e3ae5e873f1f34b1e4adb59f77cb.zip
jz47xx: Audio path tweaks:
* Increase audio buffer size to better handle IRQ latency (256->2048) * Ensure DMA engine is idle prior to starting transfers * Set AIC to repeat last sample in case of underflows Change-Id: I9c45c20481ee072e5882b7586fb7d50bd8ef2f35
Diffstat (limited to 'firmware/target/mips/ingenic_jz47xx')
-rw-r--r--firmware/target/mips/ingenic_jz47xx/codec-jz4740.c1
-rw-r--r--firmware/target/mips/ingenic_jz47xx/codec-jz4760.c1
-rw-r--r--firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c2
-rw-r--r--firmware/target/mips/ingenic_jz47xx/pcm-jz4760.c2
4 files changed, 6 insertions, 0 deletions
diff --git a/firmware/target/mips/ingenic_jz47xx/codec-jz4740.c b/firmware/target/mips/ingenic_jz47xx/codec-jz4740.c
index 702f3bb50e..a41f047026 100644
--- a/firmware/target/mips/ingenic_jz47xx/codec-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/codec-jz4740.c
@@ -267,6 +267,7 @@ void audiohw_postinit(void)
void audiohw_init(void)
{
+ __aic_play_lastsample(); /* on FIFO underflow */
i2s_codec_init();
}
diff --git a/firmware/target/mips/ingenic_jz47xx/codec-jz4760.c b/firmware/target/mips/ingenic_jz47xx/codec-jz4760.c
index bc4286fd6a..60bfecb08c 100644
--- a/firmware/target/mips/ingenic_jz47xx/codec-jz4760.c
+++ b/firmware/target/mips/ingenic_jz47xx/codec-jz4760.c
@@ -115,6 +115,7 @@ void audiohw_init(void)
__cpm_start_aic();
/* Init AIC */
+ __aic_play_lastsample(); /* on FIFO underflow. Versus 0.. */
__i2s_enable_sclk();
__i2s_external_codec();
__i2s_select_msbjustified();
diff --git a/firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c b/firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c
index 00a2b22591..ef2597ae69 100644
--- a/firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c
@@ -137,6 +137,8 @@ void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void)
void pcm_play_dma_start(const void *addr, size_t size)
{
+ pcm_play_dma_stop();
+
dma_enable();
set_dma(addr, size);
diff --git a/firmware/target/mips/ingenic_jz47xx/pcm-jz4760.c b/firmware/target/mips/ingenic_jz47xx/pcm-jz4760.c
index 59b086e4f8..098c28ecf5 100644
--- a/firmware/target/mips/ingenic_jz47xx/pcm-jz4760.c
+++ b/firmware/target/mips/ingenic_jz47xx/pcm-jz4760.c
@@ -128,6 +128,8 @@ void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void)
void pcm_play_dma_start(const void *addr, size_t size)
{
+ pcm_play_dma_stop();
+
__dmac_channel_enable_clk(DMA_AIC_TX_CHANNEL);
set_dma(addr, size);