drm/radeon: fix PLL sharing on DCE6.1 (v2)

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commit e3c00d8784 upstream.

On DCE6.1 PPLL2 is exclusively available to UNIPHYA, so it should not
be taken into consideration when looking for an already enabled PLL
to be shared with other outputs.

This fixes the broken VGA port (TRAVIS DP->VGA bridge) on my Richland
based laptop, where the internal display is connected to UNIPHYA through
a TRAVIS DP->LVDS bridge.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=78987

v2: agd: add check in radeon_get_shared_nondp_ppll as well, drop
    extra parameter.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Lucas Stach 2016-05-05 10:16:44 -04:00 • committed by Greg Kroah-Hartman

parent 9df2dc6cf4

commit 472f52f563

1 changed files with 10 additions and 0 deletions

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drivers/gpu/drm/radeon/atombios_crtc.c

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