On Wed, 3 Oct 2018 14:57:47 +0800, Y.C. Chen wrote: > From: "Y.C. Chen" <yc_chen@xxxxxxxxxxxxxx> > > The value of pitches is not correct while calling mode_set. > The issue we found so far on following system: > - Debian8 with XFCE Desktop > - Ubuntu with KDE Desktop > - SUSE15 with KDE Desktop > > Signed-off-by: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx> > --- > drivers/gpu/drm/ast/ast_mode.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c > index 5e77d45..f06aae7 100644 > --- a/drivers/gpu/drm/ast/ast_mode.c > +++ b/drivers/gpu/drm/ast/ast_mode.c > @@ -568,6 +568,7 @@ static int ast_crtc_do_set_base(struct drm_crtc *crtc, > } > ast_bo_unreserve(bo); > > + ast_set_offset_reg(crtc); > ast_set_start_address_crt1(crtc, (u32)gpu_addr); > > return 0; Tested-by: Jean Delvare <jdelvare@xxxxxxx> Reviewed-by: Jean Delvare <jdelvare@xxxxxxx> I did experience the mentioned display corruption on resolution change on an ASPEED 1100/2050 chipset, under Plasma (KDE). I can confirm that the patch above prevents it. There is also a report in openSUSE's bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=1112963 where the user tested the patch above successfully on an ASPEED 2500 chipset. Can we get the fix merged now? Thanks, -- Jean Delvare SUSE L3 Support
