<html><body><p> <pre> Hi CK, On Fri, 2024-03-01 at 07:51 +0000, CK Hu (胡俊光) wrote: > Hi, Hsiao-chien: > > On Thu, 2024-02-15 at 18:11 +0800, Hsiao Chien Sung wrote: > > We found that IGT (Intel GPU Tool) will try to commit layers with > > zero width or height and lead to undefined behaviors in hardware. > > Disable the layers in such a situation. > > Reviewed-by: CK Hu <ck.hu@mediatek.com> > > I have reviewed ovl driver, ovl does not have this limitation, so > it's > better to point out which hardware has this limitation. That's OK if > you have no information. > Thank you for the confirmation. After checking with the designer, for MT8195/MT8188, the height setting in OVL can be 0 but width cannot, otherwise the hardware could hang. Although we are not sure if other old platforms have the same behavior. Regards, Shawn </pre> </p></body></html><pre>************* MEDIATEK Confidentiality Notice ******************** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you! </pre>