drm: omapdrm: add lock for fb pinning

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Before atomic modesetting omap_framebuffer_pin() and
omap_framebuffer_unpin() were always called with modesetting locks
taken. With atomic modesetting support this is no longer the case, and
we need locking to protect the pin_count and the paddr, as multiple
threads may pin the same fb concurrently.

This patch adds a mutex to struct omap_framebuffer, and uses it in
omap_framebuffer_pin() and omap_framebuffer_unpin().

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

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Tomi Valkeinen 2015-06-04 10:56:33 +03:00 • committed by Laurent Pinchart

parent 794a65ffba

commit f524ab7c07

1 changed files with 18 additions and 1 deletions

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19

drivers/gpu/drm/omapdrm/omap_fb.c

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