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