Re: [PATCH 2/2] drm/doc: emphasize difference between plane formats and IN_FORMATS blob

On Wednesday, April 7th, 2021 at 3:51 PM, Ville Syrjälä ville.syrjala@linux.intel.com wrote:

...

• * To find out the list of formats that support modifiers, userspace
  

• * must use the plane IN_FORMATS blob property.
  

  */

Addfb2+modifiers predates the IN_FORMATS blob, so this doesn't match reality.

TBH, I'm inclined not to care about this edge-case. It's already complicated enough for user-space to figure out what's the right thing to do when supporting both implicit modifiers and explicit modifiers. Using modifiers without IN_FORMATS is risky, since a whole part of the modifier negotiation mechanism is missing.

Maybe we can just stick a "since kernel x.y.z" in here to address your concern.