From 2a50edbf10c8c56e930bfb53d8f9f00a33fd837e Mon Sep 17 00:00:00 2001 From: Qingqing Zhuo Date: Tue, 17 Aug 2021 16:29:07 -0400 Subject: drm/amd/display: Apply w/a for hard hang on HPD [Why] HPD disable and enable sequences are not mutually exclusive on Linux. For HPDs that spans under 1s (i.e. HPD low = 1s), part of the disable sequence (specifically, a request to SMU to lower refclk) could come right before the call to PHY enablement, causing DMUB to access an irresponsive PHY and thus a hard hang on the system. [How] Disable 48mhz refclk off when there is any HPD status in connected state. Reviewed-by: Hersen Wu Acked-by: Mikita Lipski Signed-off-by: Qingqing Zhuo Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/irq/irq_service.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/display/dc/irq/irq_service.c') diff --git a/drivers/gpu/drm/amd/display/dc/irq/irq_service.c b/drivers/gpu/drm/amd/display/dc/irq/irq_service.c index a2a4fbeb83f8..4db1133e4466 100644 --- a/drivers/gpu/drm/amd/display/dc/irq/irq_service.c +++ b/drivers/gpu/drm/amd/display/dc/irq/irq_service.c @@ -79,7 +79,7 @@ void dal_irq_service_destroy(struct irq_service **irq_service) *irq_service = NULL; } -static const struct irq_source_info *find_irq_source_info( +const struct irq_source_info *find_irq_source_info( struct irq_service *irq_service, enum dc_irq_source source) { -- cgit v1.2.3