On Sun, Nov 1, 2026, at 23:21, Ekansh Gupta wrote:
> *
> * This structure is used with DRM_IOCTL_QDA_QUERY to query device attributes
> - * based on @query_type.
> + * based on @query_type. @dsp_name and @cap share storage, as only one query
> + * is made per call.
> */
> struct drm_qda_query {
> __u32 query_type;
> - __u8 dsp_name[16];
> + union {
> + __u8 dsp_name[16];
> + struct {
> + __u32 attribute_id;
> + __u32 capability;
> + } cap;
> + };
> };
I think it would be better to make this separate ioctl commands
instead of a multiplexer for each thing you query. ioctl numbers
are cheap, but complexity is not.
Arnd
