Hi,
On 28.03.22 г. 12:46 ч., Tomi Valkeinen wrote:
Hi,
On 19/01/2022 12:23, Ivaylo Dimitrov wrote:
This patch series fixes excessive DMM or CMA usage of GEM buffers
leading to
various runtime allocation failures. The series enables daily usage of
devices
without exausting limited resources like CMA or DMM space if GPU
rendering is
needed.
The first patch doesn't bring any functional changes, it just moves some
TILER/DMM related code to a separate function, to simplify the review
of the
next two patches.
The second patch allows off-CPU rendering to non-scanout buffers.
Without that
patch, it is basically impossible to use the driver allocated GEM
buffers on
OMAP3 for anything else but a basic CPU rendered examples as if we
want GPU
rendering, we must allocate buffers as scanout buffers, which are CMA
allocated.
CMA soon gets fragmented and we start seeing allocation failures. Such
failres
in Xorg cannot be handeled gracefully, so the system is basically
unusable.
Third patch fixes similar issue on OMAP4/5, where DMM/TILER spaces get
fragmented with time, leading to allocation failures.
Series were tested on Motolola Droid4 and Nokia N900, with OMAP DDX and
PVR EXA from https://github.com/maemo-leste/xf86-video-omap
Ivaylo Dimitrov (3):
drm: omapdrm: simplify omap_gem_pin
drm: omapdrm: Support exporting of non-contiguous GEM BOs
drm: omapdrm: Do no allocate non-scanout GEMs through DMM/TILER
drivers/gpu/drm/omapdrm/omap_gem.c | 198
+++++++++++++++++-------------
drivers/gpu/drm/omapdrm/omap_gem.h | 3 +-
drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 5 +-
3 files changed, 116 insertions(+), 90 deletions(-)
I have pushed this to drm-misc-next.
Great, next is VRFB and TE support for Droid4 panel, as soon as I find
some spare time :)
Ivo
