Hi,
On Thu, 18 Dec 2025 14:34:43 +0100, Ludovic Desroches wrote:
The switch from devm_kzalloc() + drm_panel_init() to devm_drm_panel_alloc() introduced a regression.
Several panel descriptors do not set connector_type. For those panels, panel_simple_probe() used to compute a connector type (currently DPI as a fallback) and pass that value to drm_panel_init(). After the conversion to devm_drm_panel_alloc(), the call unconditionally used desc->connector_type instead, ignoring the computed fallback and potentially passing DRM_MODE_CONNECTOR_Unknown, which drm_panel_bridge_add() does not allow.
[...]
Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-fixes)
[1/1] drm/panel: simple: restore connector_type fallback https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/9380dc33cd6ae4a68578...