Den 01.02.2022 14.06, skrev Javier Martinez Canillas:
Hello Noralf,
On 2/1/22 13:58, Noralf Trønnes wrote:
Den 31.01.2022 21.52, skrev Sam Ravnborg:
On Mon, Jan 31, 2022 at 09:12:21PM +0100, Javier Martinez Canillas wrote:
There isn't a connector type for display controllers accesed through I2C, most drivers use DRM_MODE_CONNECTOR_Unknown or DRM_MODE_CONNECTOR_VIRTUAL.
Add an I2C connector type to match the actual connector.
As Noralf Trønnes mentions in commit fc06bf1d76d6 ("drm: Add SPI connector type"), user-space should be able to cope with a connector type that does not yet understand.
It turned out that I wasn't entirely correct here, mpv didn't cope with unknown types. In the PR to add support Emil Velikov wondered if libdrm should handle these connector names: https://github.com/mpv-player/mpv/pull/8989#issuecomment-879187711
I see, thanks for the information. What should we do then, just use the type DRM_MODE_CONNECTOR_Unknown then ?
Not really, I just wanted to point out that it could be that not all userspace will handle an unknown connector type (I just checked the DE's at the time). I haven't seen any issues after adding the SPI type so it can't be that many apps that has problems. Adding to that a tiny monochrome display is limited in which applications it will encounter I guess :) It was after adding the USB type that I discovered that mpv didn't work.
Noralf.