[CCing the regression list, as it should be in the loop for regressions: https://docs.kernel.org/admin-guide/reporting-regressions.html] [TLDR: I'm adding this report to the list of tracked Linux kernel regressions; the text you find below is based on a few templates paragraphs you might have encountered already in similar form. See link in footer if these mails annoy you.] On 12.05.23 15:20, Linus Walleij wrote: > Sorry for late regression detection but this patch regresses > the Integrator AB IMPD-1 graphics, I bisected down to this > patch. > > On Mon, Jan 2, 2023 at 12:30 PM Thomas Zimmermann <tzimmermann@xxxxxxx> wrote: > [...] > Before this patch: > > [drm] Initialized pl111 1.0.0 20170317 for c1000000.display on minor 0 > drm-clcd-pl111 c1000000.display: [drm] requested bpp 16, scaled depth down to 15 > drm-clcd-pl111 c1000000.display: enable IM-PD1 CLCD connectors > Console: switching to colour frame buffer device 80x30 > drm-clcd-pl111 c1000000.display: [drm] fb0: pl111drmfb frame buffer device > > After this patch: > > [drm] Initialized pl111 1.0.0 20170317 for c1000000.display on minor 0 > drm-clcd-pl111 c1000000.display: [drm] bpp/depth value of 16/16 not supported > drm-clcd-pl111 c1000000.display: [drm] No compatible format found > drm-clcd-pl111 c1000000.display: [drm] *ERROR* fbdev: Failed to setup > generic emulation (ret=-12) > > It seems the bpp downscaling stopped to work? [...] Thanks for the report. To be sure the issue doesn't fall through the cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression tracking bot: #regzbot ^introduced 37c90d589dc #regzbot title drm/fb-helper: downscaling apparently stopped to work with pl110_impd1 #regzbot ignore-activity This isn't a regression? This issue or a fix for it are already discussed somewhere else? It was fixed already? You want to clarify when the regression started to happen? Or point out I got the title or something else totally wrong? Then just reply and tell me -- ideally while also telling regzbot about it, as explained by the page listed in the footer of this mail. Developers: When fixing the issue, remember to add 'Link:' tags pointing to the report (the parent of this mail). See page linked in footer for details. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.
