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drm/radeon/kms: update new pll algo

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- add support for pre-avivo chips
- add support for fixed post/ref dividers
- add support for non-fractional fb dividers

By default avivo chips use the new algo and
pre-avivo chips use the old algo. Use the "new_pll"
module option to toggle between them.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2010-02-23 03:24:38 -05:00
committed by Dave Airlie
parent 939461d59d
commit 383be5d178
6 changed files with 174 additions and 85 deletions
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5
drivers/gpu/drm/radeon/radeon_legacy_crtc.c
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@@ -703,7 +703,10 @@ static void radeon_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
pll = &rdev->clock.p1pll;
pll->flags = RADEON_PLL_LEGACY;
pll->algo = PLL_ALGO_LEGACY;
if (radeon_new_pll == 1)
pll->algo = PLL_ALGO_NEW;
else
pll->algo = PLL_ALGO_LEGACY;
if (mode->clock > 200000) /* range limits??? */
pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;