diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0895-vc4_hdmi-Remove-firmware-logic-for-MAI-threshold-set.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0895-vc4_hdmi-Remove-firmware-logic-for-MAI-threshold-set.patch | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0895-vc4_hdmi-Remove-firmware-logic-for-MAI-threshold-set.patch b/target/linux/bcm27xx/patches-5.4/950-0895-vc4_hdmi-Remove-firmware-logic-for-MAI-threshold-set.patch deleted file mode 100644 index e08ceca15a..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0895-vc4_hdmi-Remove-firmware-logic-for-MAI-threshold-set.patch +++ /dev/null @@ -1,47 +0,0 @@ -From 5f22fca663178a49bbb72058ea9225d35b3d155d Mon Sep 17 00:00:00 2001 -From: Dom Cobley <popcornmix@gmail.com> -Date: Thu, 25 Jun 2020 18:48:40 +0100 -Subject: [PATCH] vc4_hdmi: Remove firmware logic for MAI threshold - setting - -This was a workaround for bugs in hardware on earlier Pi models -and wasn't totally successful. - -It makes audio quality worse on a Pi4 at the higher sample rates - -Signed-off-by: Dom Cobley <popcornmix@gmail.com> ---- - drivers/gpu/drm/vc4/vc4_hdmi.c | 22 ++++++---------------- - 1 file changed, 6 insertions(+), 16 deletions(-) - ---- a/drivers/gpu/drm/vc4/vc4_hdmi.c -+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c -@@ -1010,22 +1010,12 @@ static int vc4_hdmi_audio_prepare(struct - audio_packet_config |= VC4_SET_FIELD(channel_mask, - VC4_HDMI_AUDIO_PACKET_CEA_MASK); - -- /* Set the MAI threshold. This logic mimics the firmware's. */ -- if (vc4_hdmi->audio.samplerate > 96000) { -- HDMI_WRITE(HDMI_MAI_THR, -- VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQHIGH) | -- VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW)); -- } else if (vc4_hdmi->audio.samplerate > 48000) { -- HDMI_WRITE(HDMI_MAI_THR, -- VC4_SET_FIELD(0x14, VC4_HD_MAI_THR_DREQHIGH) | -- VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW)); -- } else { -- 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)); -- } -+ /* 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)); - - HDMI_WRITE(HDMI_MAI_CONFIG, - VC4_HDMI_MAI_CONFIG_BIT_REVERSE | |