On Wed, 3 Oct 2018 14:57:47 +0800, Y.C. Chen wrote:

From: "Y.C. Chen" yc_chen@aspeedtech.com

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@aspeedtech.com

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@suse.de Reviewed-by: Jean Delvare jdelvare@suse.de

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,