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drm/amd/display: Add debugfs to repress HPD and HPR_RX IRQs

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[Why]
For debugging reasons it can be beneficial to disable any hotplug and DP shortpulse interrupt handling.

[How]
Expose a debugfs to set a flag to bypass HPD IRQ handling and skip IRQ handling if flag is set.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Bindu Ramamurthy <bindur12@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland
2020-10-02 13:32:00 -04:00
committed by Alex Deucher
parent 83d76eeb7b
commit b972b4f913
3 changed files with 45 additions and 2 deletions
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9
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -2552,11 +2552,14 @@ static void handle_hpd_irq(void *param)
struct drm_connector *connector = &aconnector->base;
struct drm_device *dev = connector->dev;
enum dc_connection_type new_connection_type = dc_connection_none;
#ifdef CONFIG_DRM_AMD_DC_HDCP
struct amdgpu_device *adev = drm_to_adev(dev);
#ifdef CONFIG_DRM_AMD_DC_HDCP
struct dm_connector_state *dm_con_state = to_dm_connector_state(connector->state);
#endif
if (adev->dm.disable_hpd_irq)
return;
/*
* In case of failure or MST no need to update connector status or notify the OS
* since (for MST case) MST does this in its own context.
@@ -2696,6 +2699,10 @@ static void handle_hpd_rx_irq(void *param)
memset(&hpd_irq_data, 0, sizeof(hpd_irq_data));
if (adev->dm.disable_hpd_irq)
return;
/*
* TODO:Temporary add mutex to protect hpd interrupt not have a gpio
* conflict, after implement i2c helper, this mutex should be