drm/tilcdc: Write DMA base and ceiling address with single instruction

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Write DMA base and ceiling address with a single instruction, if
available. This should make it more unlikely that LCDC would fetch the
DMA addresses in the middle of an update. Having bad combination of
addresses in dma base and ceiling (e.g base > ceiling) can cause
unpredictaple behavior in LCDC.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

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This commit is contained in:

Jyri Sarha 2016-08-26 15:10:14 +03:00

parent 63b07a8d81

commit 7eb9f069ff

2 changed files with 22 additions and 2 deletions

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10

drivers/gpu/drm/tilcdc/tilcdc_crtc.c

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14

drivers/gpu/drm/tilcdc/tilcdc_regs.h

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