Hi Boris, > Boris Brezillon <boris.brezillon@xxxxxxxxxxx> hat am 5. Mai 2018 um 14:24 geschrieben: > > > On Sat, 5 May 2018 13:47:25 +0200 (CEST) > Stefan Wahren <stefan.wahren@xxxxxxxx> wrote: > > > Hi, > > > > after submit of the latest bcm2835 clock fixes, i thought this issue has been fixed. But i've seen this issue with current mainline 4.17-rc3 (bcm2835_defconfig) on Raspberry Pi 1 B (using U-Boot TFTP Boot). Strangly i couldn't reproduce this issue with same kernel but using only the Foundation bootloader (without U-Boot TFTP Boot). > > > > U-Boot version: 2018.03 > > > > I triggered the warning using my HDMI switch: > > > > [ 198.304572] ------------[ cut here ]------------ > > [ 198.304693] WARNING: CPU: 0 PID: 10 at drivers/gpu/drm/drm_atomic_helper.c:1351 drm_atomic_helper_wait_for_vblanks+0x1d4/0x1f0 > > [ 198.304703] [CRTC:68:crtc-2] vblank wait timed out > > [ 198.304751] Modules linked in: bcm2835_rng rng_core vchiq(C) > > [ 198.304790] CPU: 0 PID: 10 Comm: kworker/0:1 Tainted: G C 4.17.0-rc3+ #1 > > [ 198.304796] Hardware name: BCM2835 > > [ 198.304817] Workqueue: events output_poll_execute > > [ 198.304867] [<c010f8d8>] (unwind_backtrace) from [<c010cda4>] (show_stack+0x20/0x24) > > [ 198.304934] [<c010cda4>] (show_stack) from [<c079ae74>] (dump_stack+0x20/0x28) > > [ 198.304971] [<c079ae74>] (dump_stack) from [<c011e61c>] (__warn+0xec/0x104) > > [ 198.305012] [<c011e61c>] (__warn) from [<c011e67c>] (warn_slowpath_fmt+0x48/0x50) > > [ 198.305048] [<c011e67c>] (warn_slowpath_fmt) from [<c0421638>] (drm_atomic_helper_wait_for_vblanks+0x1d4/0x1f0) > > [ 198.305098] [<c0421638>] (drm_atomic_helper_wait_for_vblanks) from [<c0455ce8>] (vc4_atomic_complete_commit+0x80/0xb8) > > [ 198.305144] [<c0455ce8>] (vc4_atomic_complete_commit) from [<c0455e30>] (vc4_atomic_commit+0x110/0x11c) > > [ 198.305174] [<c0455e30>] (vc4_atomic_commit) from [<c043dbac>] (drm_atomic_commit+0x50/0x60) > > [ 198.305202] [<c043dbac>] (drm_atomic_commit) from [<c04251e4>] (restore_fbdev_mode_atomic+0x80/0x1cc) > > [ 198.305228] [<c04251e4>] (restore_fbdev_mode_atomic) from [<c0426a8c>] (restore_fbdev_mode+0x38/0x144) > > [ 198.305270] [<c0426a8c>] (restore_fbdev_mode) from [<c0427fa8>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x58/0x8c) > > [ 198.305296] [<c0427fa8>] (drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0428030>] (drm_fb_helper_set_par+0x54/0x60) > > [ 198.305320] [<c0428030>] (drm_fb_helper_set_par) from [<c0427f44>] (drm_fb_helper_hotplug_event+0xc8/0xd4) > > [ 198.305343] [<c0427f44>] (drm_fb_helper_hotplug_event) from [<c0428078>] (drm_fb_helper_output_poll_changed+0x1c/0x20) > > [ 198.305382] [<c0428078>] (drm_fb_helper_output_poll_changed) from [<c0419494>] (drm_kms_helper_hotplug_event+0x34/0x38) > > [ 198.305409] [<c0419494>] (drm_kms_helper_hotplug_event) from [<c041963c>] (output_poll_execute+0x16c/0x17c) > > [ 198.305440] [<c041963c>] (output_poll_execute) from [<c01337e4>] (process_one_work+0x1e0/0x368) > > [ 198.305466] [<c01337e4>] (process_one_work) from [<c0134620>] (worker_thread+0x2a0/0x418) > > [ 198.305511] [<c0134620>] (worker_thread) from [<c0138fa8>] (kthread+0x144/0x15c) > > [ 198.305539] [<c0138fa8>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c) > > [ 198.305549] Exception stack(0xc9939fb0 to 0xc9939ff8) > > [ 198.305562] 9fa0: 00000000 00000000 00000000 00000000 > > [ 198.305578] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > > [ 198.305591] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 > > [ 198.305630] ---[ end trace 9c4071c657268b83 ]--- > > > > I also dumped clk_summary in both cases, but they were identical. > > > > Are their any helpful information, which i can provide? > > I doubt this will fix your problem, but can you try with this patch > [1] applied? Unfortunately the issue still persists with patch applied. > > Also, is u-boot touching PLLH or anything related to HDMI? Since u-boot needs to enable USB and a console via HDMI this is possible. But this is done via mailbox to the VideoCore firmware, so i can't provide any helpful information [1]. Compared the sysfs regdumps for the following clocks, but didn't see any difference: vpu pllh pllh_pix_prediv Thanks Stefan [1] - https://elixir.bootlin.com/u-boot/latest/source/arch/arm/mach-bcm283x/msg.c > > [1]https://patchwork.kernel.org/patch/10207159/ _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
