Hi Am 30.11.20 um 19:39 schrieb Mikulas Patocka:
On Mon, 30 Nov 2020, Daniel Vetter wrote:On Mon, Nov 30, 2020 at 09:31:15AM -0500, Mikulas Patocka wrote:The framebuffer driver supports programs running full-screen directly on the framebuffer console, such as web browser "links -g", image viewer "fbi", postscript+pdf viewer "fbgs", ZX Spectrum emulator "fuse-sdl", movie player "mplayer -vo fbdev". The DRM driver doesn't run them.Hm this should in general work on drm drivers. Without that it's clear the switch-over isn't really ready yet.I fixed it with this patch two years ago: https://lists.freedesktop.org/archives/dri-devel/2018-June/179023.html But the patch never went through and the fb_defio feature was removed in the kernel 5.6 (commit d0c4fc5a4814e431c15272935c8dc973c18073aa). Without fb_defio, the only other possibility how to update the screen is the ioctl DRM_IOCTL_MODE_DIRTYFB. But this ioctl requires master mode, so user programs like "links -g" can't issue it.
That's confusing. DIRTYFB is only for DRM.And why can links not run as DRM master mode? If it renders to the terminal, it should act like a composer. In that case it almost certainly wants master status.
Best regards Thomas
Mikulas
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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