Maarten Lankhorst 71f0a62614 drm/i915: Only use sanitized values for ILK watermarks ... The raw watermark values are needed when planes are not part of the state, but this introduced a regression and possibly an overflow when merging the watermarks because invalid values may end up used. Solve this by calculating raw watermarks for all levels, and only setting non-zero values when the level is valid. Fixes the SNB warning: WARNING: CPU: 1 PID: 25405 at drivers/gpu/drm/i915/intel_pm.c:2580 ilk_program_watermarks+0x7b2/0x9d0 [i915]() WARN_ON(wm_lp != 1) Modules linked in: i915 drm_kms_helper drm bluetooth fuse iTCO_wdt iTCO_vendor_support syscopyarea sysfillrect sysimgblt fb_sys_fops tpm_tis mei_me e1000e snd_hda_codec_hdmi pcspkr tpm mei i2c_i801 lpc_ich snd_hda_codec snd_hda_core CPU: 1 PID: 25405 Comm: kms_universal_p Tainted: G U W 4.5.0-rc6apollolake+ #462 Hardware name: /DH67GD, BIOS BLH6710H.86A.0160.2012.1204.1156 12/04/2012 0000000000000000 ffff88009d42b918 ffffffff8143cfab ffff88009d42b960 ffffffffa0363580 ffff88009d42b950 ffffffff81082746 ffff8800b9a24928 ffff88009d42ba00 ffff88009d4a0000 0000000000000000 ffff88009d42ba6c Call Trace: [<ffffffff8143cfab>] dump_stack+0x4d/0x72 [<ffffffff81082746>] warn_slowpath_common+0x86/0xc0 [<ffffffff810827cc>] warn_slowpath_fmt+0x4c/0x50 [<ffffffffa0292862>] ilk_program_watermarks+0x7b2/0x9d0 [i915] [<ffffffffa0292cb7>] ilk_initial_watermarks+0x107/0x120 [i915] [<ffffffffa02feffa>] intel_pre_plane_update+0x12a/0x190 [i915] [<ffffffffa02ffb36>] intel_atomic_commit+0x546/0xd50 [i915] [<ffffffffa012c9e7>] drm_atomic_commit+0x37/0x60 [drm] [<ffffffffa0217361>] drm_atomic_helper_disable_plane+0xb1/0xf0 [drm_kms_helper] [<ffffffffa011cdb4>] __setplane_internal+0x184/0x280 [drm] [<ffffffffa012b57a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [<ffffffffa012010f>] drm_mode_setplane+0x13f/0x1c0 [drm] [<ffffffffa0111b52>] drm_ioctl+0x142/0x590 [drm] [<ffffffffa011ffd0>] ? drm_plane_check_pixel_format+0x50/0x50 [drm] [<ffffffff811f2744>] ? mntput+0x24/0x40 [<ffffffff811d28d4>] ? __fput+0x194/0x200 [<ffffffffa012dec3>] drm_compat_ioctl+0x33/0x40 [drm] [<ffffffffa029e1c2>] i915_compat_ioctl+0x32/0x40 [i915] [<ffffffff81228d72>] compat_SyS_ioctl+0xc2/0x330 [<ffffffff810021d5>] ? exit_to_usermode_loop+0x95/0xb0 [<ffffffff81002d2e>] do_fast_syscall_32+0x9e/0x210 [<ffffffff8197faf2>] entry_SYSENTER_compat+0x52/0x70 Cc: Matt Roper <matthew.d.roper@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Testcase: kms_universal_plane Fixes: d81f04c5ef ("drm/i915: Allow preservation of watermarks, v2.") Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/56DEA1FC.8080703@linux.intel.com Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>		2016-03-09 10:05:46 +01:00
..
drm	drm/i915: Only use sanitized values for ILK watermarks	2016-03-09 10:05:46 +01:00
host1x	gpu: host1x: Add Tegra210 support	2015-12-14 10:50:33 +01:00
ipu-v3	Merge branch 'patchwork' into v4l_for_linus	2016-01-11 11:13:27 -02:00
vga	vga_switcheroo: Add support for switching only the DDC	2016-02-09 11:21:07 +01:00
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