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| author | Wentao Liang <vulab@iscas.ac.cn> | 2025-04-22 10:13:45 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-02 14:29:16 +0200 |
| commit | 71209954f1e8ff0f0ba944c8d3b64bbed83d400c (patch) | |
| tree | 23ef3b2503b8feebe9b08042ea95e6c9996b7ec7 | |
| parent | ac65f76db9b2ff3fbc9e198c0e9aaf81b111b7d0 (diff) | |
| download | linux-stable-71209954f1e8ff0f0ba944c8d3b64bbed83d400c.tar.gz linux-stable-71209954f1e8ff0f0ba944c8d3b64bbed83d400c.zip | |
media: platform: exynos4-is: Add hardware sync wait to fimc_is_hw_change_mode()
[ Upstream commit bd9f6ce7d512fa21249415c16af801a4ed5d97b6 ]
In fimc_is_hw_change_mode(), the function changes camera modes without
waiting for hardware completion, risking corrupted data or system hangs
if subsequent operations proceed before the hardware is ready.
Add fimc_is_hw_wait_intmsr0_intmsd0() after mode configuration, ensuring
hardware state synchronization and stable interrupt handling.
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c b/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c index 366e6393817d..5f9c44e825a5 100644 --- a/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c +++ b/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c @@ -164,6 +164,7 @@ int fimc_is_hw_change_mode(struct fimc_is *is) if (WARN_ON(is->config_index >= ARRAY_SIZE(cmd))) return -EINVAL; + fimc_is_hw_wait_intmsr0_intmsd0(is); mcuctl_write(cmd[is->config_index], is, MCUCTL_REG_ISSR(0)); mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1)); mcuctl_write(is->setfile.sub_index, is, MCUCTL_REG_ISSR(2)); |