bisected: 5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff is the first bad commit

Thu Feb 17 06:18:58 PST 2011

Hello,

Commit 5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff has broken video output on my Radeon HD 5470 -- 
see screenshot attached.

bisect log:
git bisect start '--' 'drivers/gpu/drm/radeon/'
# bad: [e53b2057d8fccc3394cc38463171df948ce43aaa] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
git bisect bad e53b2057d8fccc3394cc38463171df948ce43aaa
# good: [87364760de5d631390c478fcbac8db1b926e0adf] drm/radeon/kms: fix s/r issues with bios scratch regs
git bisect good 87364760de5d631390c478fcbac8db1b926e0adf
# good: [4eace7fdfa1f8ac2f0a833e12bd07eeb453ec9ef] drm/radeon/kms: 6xx/7xx big endian fixes
git bisect good 4eace7fdfa1f8ac2f0a833e12bd07eeb453ec9ef
# good: [501834349e872ed4115eea3beef65ca9eeb5528e] drm/radeon/kms: fix tracking of BLENDCNTL, COLOR_CHANNEL_MASK, and GB_Z on r300
git bisect good 501834349e872ed4115eea3beef65ca9eeb5528e
# good: [c2049b3d29f47ed3750226dc51251a3404c85876] drm/radeon/kms: improve 6xx/7xx CS error output
git bisect good c2049b3d29f47ed3750226dc51251a3404c85876
# good: [265aa6c8d8822c9074a2174e8c9f31a37fa02e50] drm/radeon/kms: fix a few more atombios endian issues
git bisect good 265aa6c8d8822c9074a2174e8c9f31a37fa02e50
# good: [a4b40d5d97f5c9ad0b7f4bf2818291ca184bb433] drm/radeon/kms: add bounds checking to avivo pll algo
git bisect good a4b40d5d97f5c9ad0b7f4bf2818291ca184bb433
# bad: [5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff] drm/radeon/kms: hopefully fix pll issues for real (v3)
git bisect bad 5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff

5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff is the first bad commit
commit 5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff
Author: Alex Deucher <alexdeucher at gmail.com>
Date:   Mon Feb 14 11:43:11 2011 -0500

    drm/radeon/kms: hopefully fix pll issues for real (v3)

    The problematic boards have a recommended reference divider
    to be used when spread spectrum is enabled on the laptop panel.
    Enable the use of the recommended reference divider along with
    the new pll algo.

    v2: testing options

    v3: When using the fixed reference divider with LVDS, prefer
    min m to max p and use fractional feedback dividers.

    Fixes:
    https://bugzilla.kernel.org/show_bug.cgi?id=28852
    https://bugzilla.kernel.org/show_bug.cgi?id=24462
    https://bugzilla.kernel.org/show_bug.cgi?id=26552
    MacbookPro issues reported by Justin Mattock <justinmattock at gmail.com>

    Signed-off-by: Alex Deucher <alexdeucher at gmail.com>
    Cc: stable at kernel.org
    Signed-off-by: Dave Airlie <airlied at redhat.com>

:040000 040000 8736f993b97cc8370fd29048761a1e0da4969306 657bdb221e3f4da6efdfec02f8f348db5a537b29 M	drivers

 kernel: [    2.292708] [drm] Initialized drm 1.1.0 20060810
 kernel: [    2.292954] [drm] radeon defaulting to kernel modesetting.
 kernel: [    2.293028] [drm] radeon kernel modesetting enabled.
 kernel: [    2.293156] radeon 0000:01:00.0: power state changed by ACPI to D0
 kernel: [    2.293238] radeon 0000:01:00.0: power state changed by ACPI to D0
 kernel: [    2.293322] radeon 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
 kernel: [    2.293404] radeon 0000:01:00.0: setting latency timer to 64
 kernel: [    2.296184] [drm] initializing kernel modesetting (CEDAR 0x1002:0x68E0).
 kernel: [    2.296406] [drm] register mmio base: 0xB4000000
 kernel: [    2.296477] [drm] register mmio size: 131072
 kernel: [    2.296835] ATOM BIOS: Acer
 kernel: [    2.297009] radeon 0000:01:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used)
 kernel: [    2.297103] radeon 0000:01:00.0: GTT: 512M 0x0000000020000000 - 0x000000003FFFFFFF
 kernel: [    2.298370] [drm] Detected VRAM RAM=512M, BAR=256M
 kernel: [    2.298450] [drm] RAM width 64bits DDR
 kernel: [    2.298800] [TTM] Zone  kernel: Available graphics memory: 1946448 kiB.
 kernel: [    2.298876] [TTM] Initializing pool allocator.
 kernel: [    2.299366] [drm] radeon: 512M of VRAM memory ready
 kernel: [    2.299440] [drm] radeon: 512M of GTT memory ready.
 kernel: [    2.299581] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
 kernel: [    2.299659] [drm] Driver supports precise vblank timestamp query.
 kernel: [    2.299831] radeon 0000:01:00.0: irq 41 for MSI/MSI-X
 kernel: [    2.299840] radeon 0000:01:00.0: radeon: using MSI.
 kernel: [    2.299995] [drm] radeon: irq initialized.
 kernel: [    2.300066] [drm] GART: num cpu pages 131072, num gpu pages 131072
 kernel: [    2.300953] [drm] Loading CEDAR Microcode
 kernel: [    2.303973] radeon 0000:01:00.0: WB enabled
 kernel: [    2.320988] [drm] ring test succeeded in 0 usecs
 kernel: [    2.321411] [drm] radeon: ib pool ready.
 kernel: [    2.324453] [drm] ib test succeeded in 0 usecs
 kernel: [    2.327055] [drm] Radeon Display Connectors
 kernel: [    2.327126] [drm] Connector 0:
 kernel: [    2.327193] [drm]   LVDS
 kernel: [    2.327259] [drm]   DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c
 kernel: [    2.327348] [drm]   Encoders:
 kernel: [    2.327414] [drm]     LCD1: INTERNAL_UNIPHY
 kernel: [    2.327483] [drm] Connector 1:
 kernel: [    2.327551] [drm]   HDMI-A
 kernel: [    2.327617] [drm]   HPD1
 kernel: [    2.327683] [drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
 kernel: [    2.327772] [drm]   Encoders:
 kernel: [    2.327839] [drm]     DFP1: INTERNAL_UNIPHY1
 kernel: [    2.327909] [drm] Connector 2:
 kernel: [    2.328004] [drm]   VGA
 kernel: [    2.328071] [drm]   DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
 kernel: [    2.328159] [drm]   Encoders:
 kernel: [    2.328226] [drm]     CRT1: INTERNAL_KLDSCP_DAC1
 kernel: [    2.334272] [drm] Internal thermal controller with fan control
 kernel: [    2.334709] [drm] radeon: power management initialized
 kernel: [    2.734897] [drm] fb mappable at 0xA0141000
 kernel: [    2.734968] [drm] vram apper at 0xA0000000
 kernel: [    2.735037] [drm] size 4325376
 kernel: [    2.735104] [drm] fb depth is 24
 kernel: [    2.735170] [drm]    pitch is 5632
 kernel: [    2.820545] Refined TSC clocksource calibration: 2261.390 MHz.
 kernel: [    2.820560] Switching to clocksource tsc
 kernel: [    3.727928] Console: switching to colour frame buffer device 170x48
 kernel: [    3.730609] fb0: radeondrmfb frame buffer device
 kernel: [    3.730611] drm: registered panic notifier
 kernel: [    3.730684] [drm] Initialized radeon 2.8.0 20080528 for 0000:01:00.0 on minor 0
 kernel: [    3.736754] brd: module loaded

	Sergey
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