mirror/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/vc4: hvs: Set AXI panic modes for the HVS

Browse Source 
The HVS can change AXI request mode based on how full the COB
FIFOs are.
Until now the vc4 driver has been relying on the firmware to
have set these to sensible values.

With HVS channel 2 now being used for live video, change the
panic mode for all channels to be explicitly set by the driver,
and the same for all channels.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240621152055.4180873-7-dave.stevenson@raspberrypi.com
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2024-06-21 16:20:30 +01:00
parent 31c8a80b93
commit 014eccc9da
1 changed files with 11 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/vc4/vc4_hvs.c
View File

@@ -951,6 +951,17 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
SCALER_DISPCTRL_SCLEIRQ);
/* Set AXI panic mode.
* VC4 panics when < 2 lines in FIFO.
* VC5 panics when less than 1 line in the FIFO.
*/
dispctrl &= ~(SCALER_DISPCTRL_PANIC0_MASK |
SCALER_DISPCTRL_PANIC1_MASK |
SCALER_DISPCTRL_PANIC2_MASK);
dispctrl |= VC4_SET_FIELD(2, SCALER_DISPCTRL_PANIC0);
dispctrl |= VC4_SET_FIELD(2, SCALER_DISPCTRL_PANIC1);
dispctrl |= VC4_SET_FIELD(2, SCALER_DISPCTRL_PANIC2);
/* Set AXI panic mode.
* VC4 panics when < 2 lines in FIFO.
* VC5 panics when less than 1 line in the FIFO.