From: Yifan Zhang <[email protected]>

[ Upstream commit 89b3554782e6b65894f0551e9e0a82ad02dac94d ]

This patch to fix the gdm3 start failure with virual display:

/usr/libexec/gdm-x-session[1711]: (II) AMDGPU(0): Setting screen physical size 
to 270 x 203
/usr/libexec/gdm-x-session[1711]: (EE) AMDGPU(0): Failed to make import prime 
FD as pixmap: 22
/usr/libexec/gdm-x-session[1711]: (EE) AMDGPU(0): failed to set mode: Invalid 
argument
/usr/libexec/gdm-x-session[1711]: (WW) AMDGPU(0): Failed to set mode on CRTC 0
/usr/libexec/gdm-x-session[1711]: (EE) AMDGPU(0): Failed to enable any CRTC
gnome-shell[1840]: Running GNOME Shell (using mutter 42.2) as a X11 window and 
compositing manager
/usr/libexec/gdm-x-session[1711]: (EE) AMDGPU(0): failed to set mode: Invalid 
argument

vkms doesn't have modifiers support, set fb_modifiers_not_supported to bring 
the gdm back.

Signed-off-by: Yifan Zhang <[email protected]>
Acked-by: Guchun Chen <[email protected]>
Reviewed-by: Tim Huang <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
index 576849e95296..f69827aefb57 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
@@ -500,6 +500,8 @@ static int amdgpu_vkms_sw_init(void *handle)
 
        adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
 
+       adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true;
+
        r = amdgpu_display_modeset_create_props(adev);
        if (r)
                return r;
-- 
2.35.1

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