03ea364c8e
There is a hard hang observed during resume from S3 when the system receives a DP short pulse interrupt. This is because there are two code paths contending for GPIO access for AUX channel transactions. One such path is through amdgpu_dm_display_resume() function which is invoked from the regular system resume code path. The other path is through handle_hpd_rx_irq(), which is invoked in response to system receiving DP short pulse interrupt. handle_hpd_rx_irq() guards against conflicting GPIO access using hpd_lock, but the GPIO access from amdgpu_dm_display_resume() remains unguarded. This patch makes sure we use hpd_lock inside amdgpu_dm_display_resume() to avoid race conditions for GPIO access. Signed-off-by: Arindam Nath <arindam.nath@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| amdgpu_dm | ||
| dc | ||
| include | ||
| modules | ||
| Kconfig | ||
| Makefile | ||