5.15-stable review patch. If anyone has any objections, please let me know.
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From: Roman Li Roman.Li@amd.com
commit 4de141b8b1b7991b607f77e5f4580e1c67c24717 upstream.
[Why] DC is not using amdgpu_irq_get/put to manage the HPD interrupt refcounts. So when amdgpu_irq_gpu_reset_resume_helper() reprograms all of the IRQs, HPD gets disabled.
[How] Use amdgpu_irq_get/put() for HPD init/fini in DM in order to sync refcounts
Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Reviewed-by: Mario Limonciello mario.limonciello@amd.com Reviewed-by: Aurabindo Pillai aurabindo.pillai@amd.com Signed-off-by: Roman Li Roman.Li@amd.com Signed-off-by: Zaeem Mohamed zaeem.mohamed@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com (cherry picked from commit f3dde2ff7fcaacd77884502e8f572f2328e9c745) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c @@ -885,6 +885,7 @@ void amdgpu_dm_hpd_init(struct amdgpu_de struct drm_device *dev = adev_to_drm(adev); struct drm_connector *connector; struct drm_connector_list_iter iter; + int i;
drm_connector_list_iter_begin(dev, &iter); drm_for_each_connector_iter(connector, &iter) { @@ -906,6 +907,12 @@ void amdgpu_dm_hpd_init(struct amdgpu_de } } drm_connector_list_iter_end(&iter); + + /* Update reference counts for HPDs */ + for (i = DC_IRQ_SOURCE_HPD1; i <= adev->mode_info.num_hpd; i++) { + if (amdgpu_irq_get(adev, &adev->hpd_irq, i - DC_IRQ_SOURCE_HPD1)) + drm_err(dev, "DM_IRQ: Failed get HPD for source=%d)!\n", i); + } }
/** @@ -921,6 +928,7 @@ void amdgpu_dm_hpd_fini(struct amdgpu_de struct drm_device *dev = adev_to_drm(adev); struct drm_connector *connector; struct drm_connector_list_iter iter; + int i;
drm_connector_list_iter_begin(dev, &iter); drm_for_each_connector_iter(connector, &iter) { @@ -937,4 +945,10 @@ void amdgpu_dm_hpd_fini(struct amdgpu_de } } drm_connector_list_iter_end(&iter); + + /* Update reference counts for HPDs */ + for (i = DC_IRQ_SOURCE_HPD1; i <= adev->mode_info.num_hpd; i++) { + if (amdgpu_irq_put(adev, &adev->hpd_irq, i - DC_IRQ_SOURCE_HPD1)) + drm_err(dev, "DM_IRQ: Failed put HPD for source=%d!\n", i); + } }