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drm/amd/display: disable dcn20 abm feature for bring up 

[WHY] dcn20 enable usb-c dp ALT mode in dmcu. There is bug
when enable abm feature which cause system crash. dal team
will debug this bug later.

[HOW] disable dcn abm feature for dcn20.

Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
hersen wu 2019-02-28 16:35:24 -05:00 committed by Alex Deucher
parent bcba830ce7
commit 96cb7cf13d
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -781,7 +781,7 @@ static int dm_late_init(void *handle)
unsigned int linear_lut[16];
int i;
struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu;
bool ret;
bool ret = false;
for (i = 0; i < 16; i++)
linear_lut[i] = 0xFFFF * i / 15;
@ -792,10 +792,13 @@ static int dm_late_init(void *handle)
params.backlight_lut_array_size = 16;
params.backlight_lut_array = linear_lut;
ret = dmcu_load_iram(dmcu, params);
/* todo will enable for navi10 */
if (adev->asic_type <= CHIP_RAVEN) {
ret = dmcu_load_iram(dmcu, params);
if (!ret)
return -EINVAL;
if (!ret)
return -EINVAL;
}
return detect_mst_link_for_all_connectors(adev->ddev);
}