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drm/amd/display: Add an hdmi_hpd_debounce_delay_ms module

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[Why&How]
Right now, the HDMI HPD filter is enabled by default at 1500ms.

We want to disable it by default, as most modern displays with HDMI do
not require it for DPMS mode.

The HPD can instead be enabled as a driver parameter with a custom delay
value in ms (up to 5000ms).

Fixes: c918e75e1e ("drm/amd/display: Add an HPD filter for HDMI")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4859
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 6a681cd903)
This commit is contained in:
Ivan Lipski
2026-01-13 17:29:59 -05:00
committed by Alex Deucher
parent b2426a211d
commit d04f73668b
4 changed files with 29 additions and 4 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
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@@ -59,7 +59,10 @@
#define AMDGPU_HDR_MULT_DEFAULT (0x100000000LL)
#define AMDGPU_DM_HDMI_HPD_DEBOUNCE_MS 1500
/*
* Maximum HDMI HPD debounce delay in milliseconds
*/
#define AMDGPU_DM_MAX_HDMI_HPD_DEBOUNCE_MS 5000
/*
#include "include/amdgpu_dal_power_if.h"
#include "amdgpu_dm_irq.h"