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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2022-05-16 23:40:32 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2022-05-17 15:11:22 +0200 |
| commit | 20ea6adbf199097c4f5f591ffee088340630dae4 (patch) | |
| tree | d6719d95e136611a1c25bbf7789652d6d402779d /target/linux/bcm27xx/patches-5.15/950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch | |
| parent | bca05bd072180dc38ef740b37ded9572a6db1981 (diff) | |
| download | upstream-20ea6adbf199097c4f5f591ffee088340630dae4.tar.gz upstream-20ea6adbf199097c4f5f591ffee088340630dae4.tar.bz2 upstream-20ea6adbf199097c4f5f591ffee088340630dae4.zip | |
bcm27xx: add support for linux v5.15
Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B
Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch b/target/linux/bcm27xx/patches-5.15/950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch new file mode 100644 index 0000000000..477ad923e7 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch @@ -0,0 +1,32 @@ +From bf7f969a35078e4a26ca2beb562593bcbf636afa Mon Sep 17 00:00:00 2001 +From: Dom Cobley <popcornmix@gmail.com> +Date: Sun, 24 Jan 2021 15:44:10 +0000 +Subject: [PATCH] vc4/drm: Avoid full hdmi audio fifo writes + +We are getting occasional VC4_HD_MAI_CTL_ERRORF in +HDMI_MAI_CTL which seem to correspond with audio dropouts. + +Reduce the threshold where we deassert DREQ to avoid the fifo overfilling + +Signed-off-by: Dom Cobley <popcornmix@gmail.com> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -1612,10 +1612,10 @@ static int vc4_hdmi_audio_prepare(struct + + /* Set the MAI threshold */ + HDMI_WRITE(HDMI_MAI_THR, +- VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICHIGH) | +- VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICLOW) | +- VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQHIGH) | +- VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQLOW)); ++ VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_PANICHIGH) | ++ VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_PANICLOW) | ++ VC4_SET_FIELD(0x06, VC4_HD_MAI_THR_DREQHIGH) | ++ VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_DREQLOW)); + + HDMI_WRITE(HDMI_MAI_CONFIG, + VC4_HDMI_MAI_CONFIG_BIT_REVERSE | |