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authorJocelyn Falempe <jfalempe@redhat.com>2022-10-13 15:28:10 +0200
committerJocelyn Falempe <jfalempe@redhat.com>2022-10-18 16:06:10 +0200
commitb389286d0234e1edbaf62ed8bc0892a568c33662 (patch)
treeed89898ad55f56c19723413c19eaef37819aaf7a /drivers/gpu/drm/drm_sysfs.c
parentMerge drm/drm-next into drm-misc-next (diff)
downloadlinux-b389286d0234e1edbaf62ed8bc0892a568c33662.tar.xz
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drm/mgag200: Fix PLL setup for G200_SE_A rev >=4
For G200_SE_A, PLL M setting is wrong, which leads to blank screen, or "signal out of range" on VGA display. previous code had "m |= 0x80" which was changed to m |= ((pixpllcn & BIT(8)) >> 1); Tested on G200_SE_A rev 42 This line of code was moved to another file with commit 877507bb954e ("drm/mgag200: Provide per-device callbacks for PIXPLLC") but can be easily backported before this commit. v2: * put BIT(7) First to respect MSB-to-LSB (Thomas) * Add a comment to explain that this bit must be set (Thomas) Fixes: 2dd040946ecf ("drm/mgag200: Store values (not bits) in struct mgag200_pll_values") Cc: stable@vger.kernel.org Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20221013132810.521945-1-jfalempe@redhat.com
Diffstat (limited to 'drivers/gpu/drm/drm_sysfs.c')
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