<html><body><p> <pre> On Tue, 2025-07-01 at 09:30 +0200, Louis-Alexis Eyraud wrote: > External email : Please do not click links or open attachments until you have verified the sender or the content. > > > Since commit c9b1150a68d9 ("drm/atomic-helper: Re-order bridge chain > pre-enable and post-disable"), the bridge pre_enable callbacks are now > called before crtc enable, and the bridge post_disable callbacks after > the crtc disable. > In the mediatek-drm driver, this change leads to transfer errors on > mtk_dsi_host_transfer callback processing during the panel bridge > pre-enable sequence because the DSI host bridge pre_enable and CRTC > enable sequences, that are enabling the required clocks and PHY using > mtk_dsi_poweron function, are called after. > > So, in order to fix this call order issue, request the DSI host bridge > be pre-enabled before panel bridge by setting pre_enable_prev_first > flag on DSI device bridge in the mtk_dsi_host_attach function. Reviewed-by: CK Hu <ck.hu@mediatek.com> > > Fixes: c9b1150a68d9 ("drm/atomic-helper: Re-order bridge chain pre-enable and post-disable") > Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com> > --- > </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>