diff options
| author | Jeremy Compostella <jeremy.compostella@intel.com> | 2023-01-05 12:59:02 -0700 |
|---|---|---|
| committer | Subrata Banik <subratabanik@google.com> | 2023-01-12 03:02:02 +0000 |
| commit | ba2cef5b54938cce17871143ea9bbd3fc6868971 (patch) | |
| tree | aae0ad9eed78308006016148063e5346e2d89a08 /src | |
| parent | 1f4d7c772e49b66133470cf3e854fb5771a9c900 (diff) | |
soc/intel/common/block/early_graphics: Introduce a 200 ms delay
It has been reported that the PEIM graphics driver may temporarily
fail communication with the display if the time between libgfxinit
turning off the displays and the PEIM driver initialization is too
short. 200 ms has been identified as a safe delay.
This is a temporary workaround and an investigation is in progress to
come up with a better and long term solution.
BUG=b:264526798
BRANCH=firmware-brya-14505.B
TEST=Developer screen is systematically seen
Change-Id: I4ea15123eed1a4355c5ff7d815925032d4151de1
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71656
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/common/block/graphics/early_graphics.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/graphics/early_graphics.c b/src/soc/intel/common/block/graphics/early_graphics.c index 6f6a421e81..3ae7697de3 100644 --- a/src/soc/intel/common/block/graphics/early_graphics.c +++ b/src/soc/intel/common/block/graphics/early_graphics.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-or-later */ +#include <delay.h> #include <device/pci.h> #include <drivers/intel/gma/libgfxinit.h> #include <intelblocks/early_graphics.h> @@ -49,4 +50,20 @@ void early_graphics_stop(void) return; gma_gfxstop(&ret); + + /* + * Temporary workaround + * + * It has been reported that the PEIM graphics driver may temporarily + * fail communication with the display if the time between libgfxinit + * turning off the displays and the PEIM driver initialization is too + * short. 200 ms has been identified as a safe delay. + * + * An investigation is in progress to come up with a better and long + * term solution. + * + * BUG:b:264526798 + */ + if (CONFIG(RUN_FSP_GOP)) + mdelay(200); } |