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From 4f834082b678441672665a5d966d623898649583 Mon Sep 17 00:00:00 2001
From: hersen wu <hersenxs.wu@amd.com>
Date: Thu, 28 Feb 2019 16:35:24 -0500
Subject: [PATCH 2469/2940] 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>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 980d03046d69..46a02b945a4d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -779,7 +779,7 @@ 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;
@@ -790,10 +790,13 @@ 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);
}
--
2.17.1
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