drm/i915: add get_vblank_counter function for GM45

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As discussed in the long thread about vblank related timeouts, it turns out
GM45 has different frame count registers than previous chips.  This patch
adds support for them, which prevents us from waiting on really stale
sequence values in drm_wait_vblank (which rather than returning immediately
ends up timing out or getting interrupted).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>

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This commit is contained in:

Jesse Barnes 2009-02-06 10:22:41 -08:00 • committed by Dave Airlie

parent 14d200c5e5

commit 9880b7a527

5 changed files with 24 additions and 1 deletions

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4

drivers/gpu/drm/i915/i915_dma.c

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1

drivers/gpu/drm/i915/i915_drv.c

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1

drivers/gpu/drm/i915/i915_drv.h

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13

drivers/gpu/drm/i915/i915_irq.c

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6

drivers/gpu/drm/i915/i915_reg.h

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