[RFC PATCH 2/3] drm/vkms: Allow stereo modes

[Daniel Campos Ramos]

With an EDID whose HDMI Vendor-Specific Data Block declares 3D (HDMI
1.4b), the EDID parser lists frame packing, top-and-bottom and side by
side (half) modes, but the probe helper drops them with MODE_NO_STEREO
because VKMS never sets stereo_allowed. The composer and the writeback
connector handle the frame of both eyes now, so allow stereo modes on
every VKMS connector, static or hot-added, as i915, nouveau and vc4 do
on HDMI.

Connectors without an EDID are unchanged: drm_add_modes_noedid() adds
no stereo mode.

Assisted-by: LLM
Signed-off-by: Daniel Campos Ramos <Capitain_Jack@xxxxxxxxx>
---
 drivers/gpu/drm/vkms/vkms_connector.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_connector.c b/drivers/gpu/drm/vkms/vkms_connector.c
index 08e1828a0f..3449c4c213 100644
--- a/drivers/gpu/drm/vkms/vkms_connector.c
+++ b/drivers/gpu/drm/vkms/vkms_connector.c
@@ -194,6 +194,8 @@ static int __must_check vkms_connector_init(struct vkms_connector *connector,
 {
 	int ret = 0;
 
+	connector->base.stereo_allowed = true;
+
 	if (vkms_config_connector_get_supported_colorspaces(connector_cfg)) {
 		if (connector_cfg->type == DRM_MODE_CONNECTOR_HDMIA) {
 			ret = drm_mode_create_hdmi_colorspace_property(&connector->base,