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drm/radeon/kms/atom: Fix DVO support

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DVO in 12 bit mode (which seems to be the most common
config) requires 2x ppll.

Fixes fdo bug 21857.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2009-10-27 12:11:09 -04:00 committed by Dave Airlie
parent 8f552a66a4
commit d56ef9c8fd
1 changed files with 8 additions and 2 deletions
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10
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -483,8 +483,14 @@ void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
atom_execute_table(rdev->mode_info.atom_context,
index, (uint32_t *)&adjust_pll_args);
adjusted_clock = le16_to_cpu(adjust_pll_args.usPixelClock) * 10;
} else
adjusted_clock = mode->clock;
} else {
/* DVO wants 2x pixel clock if the DVO chip is in 12 bit mode */
if (ASIC_IS_AVIVO(rdev) &&
(radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1))
adjusted_clock = mode->clock * 2;
else
adjusted_clock = mode->clock;
}
if (radeon_crtc->crtc_id == 0)
pll = &rdev->clock.p1pll;