7d025e0804
Pass crtc_state to the enable callback, and connector_state to all callbacks. This will eliminate the need to guess for the correct pipe in these callbacks. The crtc state is required for pch_enable_backlight to obtain the correct cpu_transcoder. intel_dp_aux_backlight's setup function is called before hw readout, so crtc_state and connector_state->best_encoder are NULL in the enable() and set() callbacks. This fixes the following series of warns from intel_get_pipe_from_connector: [ 219.968428] ------------[ cut here ]------------ [ 219.968481] WARNING: CPU: 3 PID: 2457 at drivers/gpu/drm/i915/intel_display.c:13881 intel_get_pipe_from_connector+0x62/0x90 [i915] [ 219.968483] WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)) [ 219.968485] Modules linked in: nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm intel_rapl x86_pkg_temp_thermal coretemp kvm_intel snd_seq_midi snd_seq_midi_event kvm snd_rawmidi irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc snd_seq snd_seq_device serio_raw snd_timer aesni_intel aes_x86_64 crypto_simd glue_helper cryptd lpc_ich snd mei_me shpchp soundcore mei rfkill_gpio mac_hid intel_pmc_ipc parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid igb ahci i915 xhci_pci dca xhci_hcd ptp sdhci_pci sdhci libahci pps_core i2c_hid hid video [ 219.968573] CPU: 3 PID: 2457 Comm: kworker/u8:3 Tainted: G W 4.10.0-tip-201703010159+ #2 [ 219.968575] Hardware name: Intel Corp. Broxton P/NOTEBOOK, BIOS APLKRVPA.X64.0144.B10.1606270006 06/27/2016 [ 219.968627] Workqueue: events_unbound intel_atomic_commit_work [i915] [ 219.968629] Call Trace: [ 219.968640] dump_stack+0x63/0x87 [ 219.968646] __warn+0xd1/0xf0 [ 219.968651] warn_slowpath_fmt+0x4f/0x60 [ 219.968657] ? drm_printk+0x97/0xa0 [ 219.968708] intel_get_pipe_from_connector+0x62/0x90 [i915] [ 219.968756] intel_panel_enable_backlight+0x19/0xf0 [i915] [ 219.968804] intel_edp_backlight_on.part.22+0x33/0x40 [i915] [ 219.968852] intel_edp_backlight_on+0x18/0x20 [i915] [ 219.968900] intel_enable_ddi+0x94/0xc0 [i915] [ 219.968950] intel_encoders_enable.isra.93+0x77/0x90 [i915] [ 219.969000] haswell_crtc_enable+0x310/0x7f0 [i915] [ 219.969051] intel_update_crtc+0x58/0x100 [i915] [ 219.969101] skl_update_crtcs+0x218/0x240 [i915] [ 219.969153] intel_atomic_commit_tail+0x350/0x1000 [i915] [ 219.969159] ? vtime_account_idle+0xe/0x50 [ 219.969164] ? finish_task_switch+0x107/0x250 [ 219.969214] intel_atomic_commit_work+0x12/0x20 [i915] [ 219.969219] process_one_work+0x153/0x3f0 [ 219.969223] worker_thread+0x12b/0x4b0 [ 219.969227] kthread+0x101/0x140 [ 219.969230] ? rescuer_thread+0x340/0x340 [ 219.969233] ? kthread_park+0x90/0x90 [ 219.969237] ? do_syscall_64+0x6e/0x180 [ 219.969243] ret_from_fork+0x2c/0x40 [ 219.969246] ---[ end trace 0a8fa19387b9ad6d ]--- Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100022 Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170612102115.23665-4-maarten.lankhorst@linux.intel.com Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.