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drm/i915: Allow frame buffers up to 4096x4096 on 915/945 class hardware

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The 915 and 945 scanout engines can handle frame buffers up to 4096 pixels
wide. Pre-9xx hardware has an 8192 byte stride limit, and so we leave the
existing 2048 max in place.

I'm not sure why we limit the height to the same value; there's no intrinsic
hardware limit in the scanout engine.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Keith Packard 2009-07-12 23:53:17 -07:00 committed by Eric Anholt
parent 8a90523639
commit 5e4d6fa726
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/intel_display.c
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@ -3148,6 +3148,9 @@ void intel_modeset_init(struct drm_device *dev)
if (IS_I965G(dev)) {
dev->mode_config.max_width = 8192;
dev->mode_config.max_height = 8192;
} else if (IS_I9XX(dev)) {
dev->mode_config.max_width = 4096;
dev->mode_config.max_height = 4096;
} else {
dev->mode_config.max_width = 2048;
dev->mode_config.max_height = 2048;