drm/omap: add pin refcounting to omap_framebuffer

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omap_framebuffer_pin() and omap_framebuffer_unpin() are currently
broken, as they cannot be called multiple times (i.e. pin, pin, unpin,
unpin), which is what happens in certain cases. This issue causes the
driver to possibly use 0 as an address for a displayed buffer, leading
to OCP error from DSS.

This patch fixes the issue by adding a simple pin_count, used to track
the number of pins.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

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Tomi Valkeinen 2014-09-03 19:25:54 +00:00

parent 3f4d17c4ec

commit f36eb5a899

1 changed files with 13 additions and 0 deletions

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drivers/gpu/drm/omapdrm/omap_fb.c

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