diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2016-09-28 16:44:59 (GMT) |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-09-28 20:13:19 (GMT) |
| commit | 2744b647f49e24d636c8b293325aed674363f0d2 (patch) | |
| tree | 437099f2c84300cdff8489881652a5f1223614ca /drivers/gpu/drm | |
| parent | 324082586cc5918e3230f0b2f326656c653201eb (diff) | |
| download | linux-2744b647f49e24d636c8b293325aed674363f0d2.tar.xz | |
drm/amdgpu/dce6: disable hpd on local panels
Otherwise we can get a hotplug interrupt storm when
we turn the panel off if hpd interrupts were enabled
by the bios.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=97471
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c index eb8f96a..fce9256 100644 --- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c @@ -375,15 +375,6 @@ static void dce_v6_0_hpd_init(struct amdgpu_device *adev) list_for_each_entry(connector, &dev->mode_config.connector_list, head) { struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector); - if (connector->connector_type == DRM_MODE_CONNECTOR_eDP || - connector->connector_type == DRM_MODE_CONNECTOR_LVDS) { - /* don't try to enable hpd on eDP or LVDS avoid breaking the - * aux dp channel on imac and help (but not completely fix) - * https://bugzilla.redhat.com/show_bug.cgi?id=726143 - * also avoid interrupt storms during dpms. - */ - continue; - } switch (amdgpu_connector->hpd.hpd) { case AMDGPU_HPD_1: WREG32(DC_HPD1_CONTROL, tmp); @@ -406,6 +397,45 @@ static void dce_v6_0_hpd_init(struct amdgpu_device *adev) default: break; } + + if (connector->connector_type == DRM_MODE_CONNECTOR_eDP || + connector->connector_type == DRM_MODE_CONNECTOR_LVDS) { + /* don't try to enable hpd on eDP or LVDS avoid breaking the + * aux dp channel on imac and help (but not completely fix) + * https://bugzilla.redhat.com/show_bug.cgi?id=726143 + * also avoid interrupt storms during dpms. + */ + u32 dc_hpd_int_cntl_reg, dc_hpd_int_cntl; + + switch (amdgpu_connector->hpd.hpd) { + case AMDGPU_HPD_1: + dc_hpd_int_cntl_reg = DC_HPD1_INT_CONTROL; + break; + case AMDGPU_HPD_2: + dc_hpd_int_cntl_reg = DC_HPD2_INT_CONTROL; + break; + case AMDGPU_HPD_3: + dc_hpd_int_cntl_reg = DC_HPD3_INT_CONTROL; + break; + case AMDGPU_HPD_4: + dc_hpd_int_cntl_reg = DC_HPD4_INT_CONTROL; + break; + case AMDGPU_HPD_5: + dc_hpd_int_cntl_reg = DC_HPD5_INT_CONTROL; + break; + case AMDGPU_HPD_6: + dc_hpd_int_cntl_reg = DC_HPD6_INT_CONTROL; + break; + default: + continue; + } + + dc_hpd_int_cntl = RREG32(dc_hpd_int_cntl_reg); + dc_hpd_int_cntl &= ~DC_HPDx_INT_EN; + WREG32(dc_hpd_int_cntl_reg, dc_hpd_int_cntl); + continue; + } + dce_v6_0_hpd_set_polarity(adev, amdgpu_connector->hpd.hpd); amdgpu_irq_get(adev, &adev->hpd_irq, amdgpu_connector->hpd.hpd); } |