drm/amd/display: disable dcn20 abm feature for bring up (96cb7cf1) · Commits · 戴 / test

[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

+7 −4

Original line number	Diff line number	Diff line
		@@ -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;

		/* todo will enable for navi10 */
		if (adev->asic_type <= CHIP_RAVEN) {
		ret = dmcu_load_iram(dmcu, params);

		if (!ret)
		return -EINVAL;
		}

		return detect_mst_link_for_all_connectors(adev->ddev);
		}

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