4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher <alexander.deucher@xxxxxxx> commit e96ec90f496603c48e0945f8bdeb4cdf3088cbba upstream. 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@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c @@ -419,16 +419,6 @@ static void dce_v10_0_hpd_init(struct am 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: idx = 0; @@ -452,6 +442,19 @@ static void dce_v10_0_hpd_init(struct am continue; } + 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. + */ + tmp = RREG32(mmDC_HPD_INT_CONTROL + hpd_offsets[idx]); + tmp = REG_SET_FIELD(tmp, DC_HPD_INT_CONTROL, DC_HPD_INT_EN, 0); + WREG32(mmDC_HPD_INT_CONTROL + hpd_offsets[idx], tmp); + continue; + } + tmp = RREG32(mmDC_HPD_CONTROL + hpd_offsets[idx]); tmp = REG_SET_FIELD(tmp, DC_HPD_CONTROL, DC_HPD_EN, 1); WREG32(mmDC_HPD_CONTROL + hpd_offsets[idx], tmp); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html