vc4/drm: Adjustments to hdmi audio dma to reduce glitches #4208
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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 <[email protected]>
With HBR audio (8 channel 192kHz) we get occasional VC4_HD_MAI_CTL_DLATE error flags in HDMI_MAI_CTL which seem to correspond with audio dropouts. Increasing the normal AXI priority for dma is needed to avoid these Signed-off-by: Dom Cobley <[email protected]>
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Draft, while waiting for feedback from @HiassofT |
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Testing with my local sample files was fine, I didn't get a single dlate error. So everything OK from my side |
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Removed draft status. |
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kernel: drm/vc4: crtc: Reduce PV fifo threshold on hvs4 See: raspberrypi/linux#4207 kernel: vc4/drm: Adjustments to hdmi audio dma to reduce glitches See: raspberrypi/linux#4208 kernel: overlays: gpio-led: new overlay See: raspberrypi/linux#4206 kernel: bcm2835-codec tweaks See: raspberrypi/linux#4113 kernel: Assign crypto aliases to different AES implementation modules See: raspberrypi/linux#4198 kernel: media: bcm2835-unicam: Fix bug in buffer swapping logic See: raspberrypi/linux#4189 kernel: configs: Add CONFIG_RTS_HCTOSYS=y See: raspberrypi/linux#4205 kernel: overlays: Improve the i2c-rtc,i2c_csi_dsi option firmware: video_decode: For VC1/WMV with no signalled header bytes, use start of 1st buffer See: raspberrypi/linux#4113
popcornmix
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kernel: drm/vc4: crtc: Reduce PV fifo threshold on hvs4 See: raspberrypi/linux#4207 kernel: vc4/drm: Adjustments to hdmi audio dma to reduce glitches See: raspberrypi/linux#4208 kernel: overlays: gpio-led: new overlay See: raspberrypi/linux#4206 kernel: bcm2835-codec tweaks See: raspberrypi/linux#4113 kernel: Assign crypto aliases to different AES implementation modules See: raspberrypi/linux#4198 kernel: media: bcm2835-unicam: Fix bug in buffer swapping logic See: raspberrypi/linux#4189 kernel: configs: Add CONFIG_RTS_HCTOSYS=y See: raspberrypi/linux#4205 kernel: overlays: Improve the i2c-rtc,i2c_csi_dsi option firmware: video_decode: For VC1/WMV with no signalled header bytes, use start of 1st buffer See: raspberrypi/linux#4113
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Avoid full hdmi audio fifo writes and increase hdmi audio axi priority to avoid lost samples.