drm/tegra: fb: Implement ->fb_mmap() callback

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This fixes hangs with legacy applications that use the mmap() syscall on
the fbdev device to map framebuffer memory. The fbdev implementation for
mmap() creates a mapping that conflicts with DRM usage and causes a hang
when the memory is accessed through the mapping.

Reported-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tested-by: Stefan Agner <stefan@agner.ch>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reported-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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Thierry Reding 2018-02-07 18:45:56 +01:00

parent 04c0746663

commit b8f3f500e0

1 changed files with 16 additions and 0 deletions

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drivers/gpu/drm/tegra/fb.c

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