Bug 67435

Summary: HDMI audio silent on Radeon Mobility HD4650
Product: DRI Reporter: Kris Scott <kris>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: All   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
fix none

Description Kris Scott 2013-07-28 14:21:36 UTC 
I cannot get any audio through the HDMI port, internal speakers work as they should. Kernel option is properly set, and everything is unmuted.

Audio worked fine in the 3.9 kernels, and stopped working somewhere in 3.10

Currently using 3.11-rc2 and still have the same issue.

relevant info from dmesg:
-------
Kernel command line: BOOT_IMAGE=/vmlinuz-3.11.0-rc2 radeon.dpm=1 radeon.audio=1 video=1360x768 rootfstype=btrfs root=/dev/sda3
[drm] Initialized drm 1.1.0 20060810
[drm] radeon kernel modesetting enabled.
[drm] initializing kernel modesetting (RV730 0x1002:0x9480 0x104D:0x9035).
[drm] register mmio base: 0xD0020000
[drm] register mmio size: 65536
radeon 0000:01:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used)
radeon 0000:01:00.0: GTT: 512M 0x0000000020000000 - 0x000000003FFFFFFF
[drm] Detected VRAM RAM=512M, BAR=256M
[drm] RAM width 128bits DDR
[drm] radeon: 512M of VRAM memory ready
[drm] radeon: 512M of GTT memory ready.
[drm] GART: num cpu pages 131072, num gpu pages 131072
[drm] Loading RV730 Microcode
[drm] PCIE GART of 512M enabled (table at 0x000000000025D000).
radeon 0000:01:00.0: WB enabled
radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000020000c00 and cpu addr 0xffff88013856dc00
radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000020000c0c and cpu addr 0xffff88013856dc0c
radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c598 and cpu addr 0xffffc90010d9c598
[drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[drm] Driver supports precise vblank timestamp query.
radeon 0000:01:00.0: irq 50 for MSI/MSI-X
radeon 0000:01:00.0: radeon: using MSI.
[drm] radeon: irq initialized.
[drm] ring test on 0 succeeded in 1 usecs
[drm] ring test on 3 succeeded in 1 usecs
[drm] ring test on 5 succeeded in 1 usecs
[drm] UVD initialized successfully.
[drm] Enabling audio support
[drm] ib test on ring 0 succeeded in 0 usecs
[drm] ib test on ring 3 succeeded in 0 usecs
[drm] ib test on ring 5 succeeded
[drm:radeon_atombios_get_lvds_info] *ERROR* Bad LCD record 217
[drm] radeon atom DIG backlight initialized
[drm] Radeon Display Connectors
[drm] Connector 0:
[drm]   LVDS-1
[drm]   Encoders:
[drm]     LCD1: INTERNAL_UNIPHY2
[drm] Connector 1:
[drm]   VGA-1
[drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[drm]   Encoders:
[drm]     CRT1: INTERNAL_KLDSCP_DAC1
[drm] Connector 2:
[drm]   HDMI-A-1
[drm]   HPD1
[drm]   DDC: 0x7f10 0x7f10 0x7f14 0x7f14 0x7f18 0x7f18 0x7f1c 0x7f1c
[drm]   Encoders:
[drm]     DFP1: INTERNAL_UNIPHY
[drm] radeon: dpm initialized
[drm] fb mappable at 0xC035F000
[drm] vram apper at 0xC0000000
[drm] size 4325376
[drm] fb depth is 24
[drm]    pitch is 5632
fbcon: radeondrmfb (fb0) is primary device
radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
radeon 0000:01:00.0: registered panic notifier
[drm] Initialized radeon 2.34.0 20080528 for 0000:01:00.0 on minor 0
----
Comment 1 Alex Deucher 2013-07-28 14:38:01 UTC 
Can you bisect?
Comment 2 Kris Scott 2013-07-28 23:25:57 UTC 
Will do, gonna take some time though. Kernel compiling is not the fastest.
Comment 3 Rafał Miłecki 2013-07-29 05:17:16 UTC 
You can also compare output of
avivotool regs hdmi
when using 3.9 and 3.10. That should give some hint.
Comment 4 Kris Scott 2013-07-29 16:43:11 UTC 
Bisect complete:

b1f6f47e3e33c4a74534f1301aca241ffabbb3a0 is the first bad commit
commit b1f6f47e3e33c4a74534f1301aca241ffabbb3a0
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Thu Apr 18 10:50:55 2013 -0400

    drm/radeon: clean up audio dto programming
    
    Split into DCE2/3 and DCE4/5 variants. Still todo is to
    calculate the DTO dividers properly.  Add proper formula
    to the comments.
    
    Reviewed-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 b60cf880f2227596705391e71a56aaa12e1eb61c a723f4928d1a20bcd0b5759077360f9342c9eecc M	drivers
Comment 5 Rafał Miłecki 2013-07-29 16:59:48 UTC 
As I suggested earlier, can you provide output of "avivotool regs hdmi" before and after this patch?

This way we will sure if registers are programmed and with what values.
Comment 6 Kris Scott 2013-07-29 17:06:02 UTC 
Good:

RADEON_DAC_CNTL	00000000
RADEON_DAC_EXT_CNTL	00000000
RADEON_DAC_MACRO_CNTL	00000000
RADEON_DAC_CNTL2	00000000
RADEON_TV_DAC_CNTL	00000000
RADEON_DISP_OUTPUT_CNTL	00000000
RADEON_CONFIG_MEMSIZE	00000000
RADEON_AUX_SC_CNTL	804df8a8
RADEON_CRTC_EXT_CNTL	00000000
RADEON_CRTC_GEN_CNTL	00000000
RADEON_CRTC2_GEN_CNTL	00000000
RADEON_DEVICE_ID	00000000
RADEON_DISP_MISC_CNTL	00000000
RADEON_GPIO_MONID	00000000
RADEON_GPIO_MONIDB	00000000
RADEON_GPIO_CRT2_DDC	00000000
RADEON_GPIO_DVI_DDC	00000000
RADEON_GPIO_VGA_DDC	00000000
RADEON_LVDS_GEN_CNTL	00000000
RADEON_LVDS_PLL_CNTL	00000000
RADEON_FP_GEN_CNTL	00000000
RADEON_FP2_GEN_CNTL	00000000
RADEON_PPLL_CNTL	00000000
RADEON_PPLL_REF_DIV	00000000
RADEON_PPLL_DIV_3	00000000
RADEON_PIXCLKS_CNTL	00000000
RADEON_P2PLL_CNTL	00000000
RADEON_P2PLL_REF_DIV	00000000
RADEON_P2PLL_DIV_0	00000000
RADEON_VCLK_ECP_CNTL	00000000
RADEON_MEM_TIMING_CNTL	00000000
RADEON_TMDS_PLL_CNTL	00000000
RADEON_TMDS_TRANSMITTER_CNTL	00000000
RADEON_CRTC_MORE_CNTL	00000000
RADEON_FP_H_SYNC_STRT_WID	00000000
RADEON_FP_V_SYNC_STRT_WID	00000000
RADEON_FP_CRTC_H_TOTAL_DISP	00000000
RADEON_FP_CRTC_V_TOTAL_DISP	00000000
RADEON_FP_HORZ_STRETCH	00000000
RADEON_FP_VERT_STRETCH	00000000
RADEON_FP_HORZ_VERT_ACTIVE	00000000
RADEON_CRTC_H_TOTAL_DISP	00000004
RADEON_CRTC_H_SYNC_STRT_WID	18b8bebc
RADEON_CRTC_V_TOTAL_DISP	fffe0a02
RADEON_CRTC_V_SYNC_STRT_WID	00000000
RADEON_CRTC2_H_TOTAL_DISP	0200000f
RADEON_CRTC2_H_SYNC_STRT_WID	00000000
RADEON_CRTC2_V_TOTAL_DISP	00000100
RADEON_CRTC2_V_SYNC_STRT_WID	00000002

-----
Bad:

RADEON_DAC_CNTL	00000000
RADEON_DAC_EXT_CNTL	00000000
RADEON_DAC_MACRO_CNTL	00000000
RADEON_DAC_CNTL2	00000000
RADEON_TV_DAC_CNTL	00000000
RADEON_DISP_OUTPUT_CNTL	00000000
RADEON_CONFIG_MEMSIZE	00000000
RADEON_AUX_SC_CNTL	c045fab8
RADEON_CRTC_EXT_CNTL	00000000
RADEON_CRTC_GEN_CNTL	00000000
RADEON_CRTC2_GEN_CNTL	00000000
RADEON_DEVICE_ID	00000000
RADEON_DISP_MISC_CNTL	00000000
RADEON_GPIO_MONID	00000000
RADEON_GPIO_MONIDB	00000000
RADEON_GPIO_CRT2_DDC	00000000
RADEON_GPIO_DVI_DDC	00000000
RADEON_GPIO_VGA_DDC	00000000
RADEON_LVDS_GEN_CNTL	00000000
RADEON_LVDS_PLL_CNTL	00000000
RADEON_FP_GEN_CNTL	00000000
RADEON_FP2_GEN_CNTL	00000000
RADEON_PPLL_CNTL	00000000
RADEON_PPLL_REF_DIV	00000000
RADEON_PPLL_DIV_3	00000000
RADEON_PIXCLKS_CNTL	00000000
RADEON_P2PLL_CNTL	00000000
RADEON_P2PLL_REF_DIV	00000000
RADEON_P2PLL_DIV_0	00000000
RADEON_VCLK_ECP_CNTL	00000000
RADEON_MEM_TIMING_CNTL	00000000
RADEON_TMDS_PLL_CNTL	00000000
RADEON_TMDS_TRANSMITTER_CNTL	00000000
RADEON_CRTC_MORE_CNTL	00000000
RADEON_FP_H_SYNC_STRT_WID	00000000
RADEON_FP_V_SYNC_STRT_WID	00000000
RADEON_FP_CRTC_H_TOTAL_DISP	00000000
RADEON_FP_CRTC_V_TOTAL_DISP	00000000
RADEON_FP_HORZ_STRETCH	00000000
RADEON_FP_VERT_STRETCH	00000000
RADEON_FP_HORZ_VERT_ACTIVE	00000000
RADEON_CRTC_H_TOTAL_DISP	00000004
RADEON_CRTC_H_SYNC_STRT_WID	18b836bc
RADEON_CRTC_V_TOTAL_DISP	fffe0a02
RADEON_CRTC_V_SYNC_STRT_WID	00000000
RADEON_CRTC2_H_TOTAL_DISP	0200000f
RADEON_CRTC2_H_SYNC_STRT_WID	00000000
RADEON_CRTC2_V_TOTAL_DISP	00000100
RADEON_CRTC2_V_SYNC_STRT_WID	00000002
Comment 7 Rafał Miłecki 2013-07-29 17:39:37 UTC 
Err, did you call "avivotool regs hdmi" as I asked?

It should return something like:

Audio clocks:
EVERGREEN_AUDIO_PLL1_MUL        00000000
EVERGREEN_AUDIO_PLL1_DIV        00000001
EVERGREEN_AUDIO_PLL1_UNK        00000070

which is the most interesting part for us.

Of course on R6xx hardware it won't start with EVERGREEN_*
Comment 8 Kris Scott 2013-07-29 18:11:44 UTC 
Oops, sorry, here you go.

Good:

Audio clocks:
R600_AUDIO_PLL1_MUL	00000000
R600_AUDIO_PLL1_DIV	00000000
R600_AUDIO_PLL2_MUL	00249f00
R600_AUDIO_PLL2_DIV	00714be8
R600_AUDIO_CLK_SRCSEL	00000001

Audio general:
R600_AUDIO_ENABLE	810000f0
R600_AUDIO_TIMING	00000170

Audio params:
R600_AUDIO_VENDOR_ID	1002aa01
R600_AUDIO_REVISION_ID	00100100
R600_AUDIO_ROOT_NODE_COUNT	00010001
R600_AUDIO_NID1_NODE_COUNT	00020002
R600_AUDIO_NID1_TYPE	00000001
R600_AUDIO_SUPPORTED_SIZE_RATE	00020070
R600_AUDIO_SUPPORTED_CODEC	00000001
R600_AUDIO_SUPPORTED_POWER_STATES	00000009
R600_AUDIO_NID2_CAPS	00000201
R600_AUDIO_NID3_CAPS	00400381
R600_AUDIO_NID3_PIN_CAPS	00000094

Audio conn list:
R600_AUDIO_CONN_LIST_LEN	00000001
R600_AUDIO_CONN_LIST	08060402

Audio verbs:
R600_AUDIO_RATE_BPS_CHANNEL	00004011
R600_AUDIO_PLAYING	00000010
R600_AUDIO_IMPLEMENTATION_ID	104d2e00
R600_AUDIO_CONFIG_DEFAULT	18560010
R600_AUDIO_PIN_SENSE	7fffffff
R600_AUDIO_PIN_WIDGET_CNTL	40404040
R600_AUDIO_STATUS_BITS	00000001

HDMI block at 0x7400:
00007400	00000011 (17)
00007404	00000000 (0)
00007408	00000010 (16)
0000740c	00010000 (65536)
00007410	00000000 (0)
00007414	00000000 (0)
00007418	00000000 (0)
0000741c	00000000 (0)
00007420	00000000 (0)
00007424	00000000 (0)
00007428	00000000 (0)
0000742c	00000000 (0)
00007430	00000000 (0)
00007434	00000000 (0)
00007438	00000000 (0)
0000743c	00000000 (0)
00007440	00000000 (0)
00007444	00000000 (0)
00007448	00000000 (0)
0000744c	00000000 (0)
00007450	00000000 (0)
00007454	00000000 (0)
00007458	00000000 (0)
0000745c	00000000 (0)
00007460	02000000 (33554432)
00007464	00000000 (0)
00007468	00000000 (0)
0000746c	00000000 (0)
00007470	00000000 (0)
00007474	00000000 (0)
00007478	00000000 (0)
0000747c	00000000 (0)
00007480	00000000 (0)
00007484	00000000 (0)
00007488	00000000 (0)
0000748c	00000000 (0)
00007490	00000000 (0)
00007494	00000000 (0)
00007498	00000000 (0)
0000749c	00000000 (0)
000074a0	00000000 (0)
000074a4	00000000 (0)
000074a8	00000000 (0)
000074ac	00000000 (0)
000074b0	00000000 (0)
000074b4	00000000 (0)
000074b8	00000000 (0)
000074bc	00000000 (0)
000074c0	00000000 (0)
000074c4	00000000 (0)
000074c8	00000000 (0)
000074cc	00000170 (368)
000074d0	00000000 (0)
000074d4	10000000 (268435456)
000074d8	00000000 (0)
000074dc	00000000 (0)
000074e0	00000000 (0)
000074e4	00000000 (0)
000074e8	00000000 (0)
000074ec	00000000 (0)

HDMI block at 0x7800:
00007800	00000011 (17)
00007804	00010000 (65536)
00007808	00030010 (196624)
0000780c	00001000 (4096)
00007810	00000031 (49)
00007814	00000033 (51)
00007818	00000202 (514)
0000781c	00000000 (0)
00007820	00000000 (0)
00007824	00000000 (0)
00007828	00000000 (0)
0000782c	00000000 (0)
00007830	00000000 (0)
00007834	00000000 (0)
00007838	00000000 (0)
0000783c	00000000 (0)
00007840	00000000 (0)
00007844	00000000 (0)
00007848	00000000 (0)
0000784c	00000000 (0)
00007850	00000000 (0)
00007854	00080065 (524389)
00007858	00000004 (4)
0000785c	00000000 (0)
00007860	00000000 (0)
00007864	00000000 (0)
00007868	00000000 (0)
0000786c	00000000 (0)
00007870	00000000 (0)
00007874	00000000 (0)
00007878	00000000 (0)
0000787c	00000000 (0)
00007880	00000000 (0)
00007884	00000000 (0)
00007888	00000000 (0)
0000788c	00000000 (0)
00007890	00000000 (0)
00007894	00000000 (0)
00007898	00000000 (0)
0000789c	00000000 (0)
000078a0	00000000 (0)
000078a4	00000000 (0)
000078a8	00000000 (0)
000078ac	1220a000 (304128000)
000078b0	00001000 (4096)
000078b4	14244000 (337920000)
000078b8	00001880 (6272)
000078bc	1220a000 (304128000)
000078c0	00001800 (6144)
000078c4	14242000 (337911808)
000078c8	00001880 (6272)
000078cc	00000170 (368)
000078d0	00000000 (0)
000078d4	00000000 (0)
000078d8	00000002 (2)
000078dc	00001100 (4352)
000078e0	00ffffff (16777215)
000078e4	007fffff (8388607)
000078e8	00000001 (1)
000078ec	00000001 (1)

--------
Bad:

Audio clocks:
R600_AUDIO_PLL1_MUL	00249f00
R600_AUDIO_PLL1_DIV	00714be8
R600_AUDIO_PLL2_MUL	00000000
R600_AUDIO_PLL2_DIV	00000000
R600_AUDIO_CLK_SRCSEL	00000000

Audio general:
R600_AUDIO_ENABLE	811000f0
R600_AUDIO_TIMING	00000070

Audio params:
R600_AUDIO_VENDOR_ID	1002aa01
R600_AUDIO_REVISION_ID	00100100
R600_AUDIO_ROOT_NODE_COUNT	00010001
R600_AUDIO_NID1_NODE_COUNT	00020002
R600_AUDIO_NID1_TYPE	00000001
R600_AUDIO_SUPPORTED_SIZE_RATE	00020070
R600_AUDIO_SUPPORTED_CODEC	00000001
R600_AUDIO_SUPPORTED_POWER_STATES	00000009
R600_AUDIO_NID2_CAPS	00000201
R600_AUDIO_NID3_CAPS	00400381
R600_AUDIO_NID3_PIN_CAPS	00000094

Audio conn list:
R600_AUDIO_CONN_LIST_LEN	00000001
R600_AUDIO_CONN_LIST	08060402

Audio verbs:
R600_AUDIO_RATE_BPS_CHANNEL	00000011
R600_AUDIO_PLAYING	00000010
R600_AUDIO_IMPLEMENTATION_ID	104d2e00
R600_AUDIO_CONFIG_DEFAULT	18560010
R600_AUDIO_PIN_SENSE	7fffffff
R600_AUDIO_PIN_WIDGET_CNTL	40404040
R600_AUDIO_STATUS_BITS	00000001

HDMI block at 0x7400:
00007400	00000011 (17)
00007404	00000000 (0)
00007408	00000010 (16)
0000740c	00010000 (65536)
00007410	00000000 (0)
00007414	00000000 (0)
00007418	00000000 (0)
0000741c	00000000 (0)
00007420	00000000 (0)
00007424	00000000 (0)
00007428	00000000 (0)
0000742c	00000000 (0)
00007430	00000000 (0)
00007434	00000000 (0)
00007438	00000000 (0)
0000743c	00000000 (0)
00007440	00000000 (0)
00007444	00000000 (0)
00007448	00000000 (0)
0000744c	00000000 (0)
00007450	00000000 (0)
00007454	00000000 (0)
00007458	00000000 (0)
0000745c	00000000 (0)
00007460	02000000 (33554432)
00007464	00000000 (0)
00007468	00000000 (0)
0000746c	00000000 (0)
00007470	00000000 (0)
00007474	00000000 (0)
00007478	00000000 (0)
0000747c	00000000 (0)
00007480	00000000 (0)
00007484	00000000 (0)
00007488	00000000 (0)
0000748c	00000000 (0)
00007490	00000000 (0)
00007494	00000000 (0)
00007498	00000000 (0)
0000749c	00000000 (0)
000074a0	00000000 (0)
000074a4	00000000 (0)
000074a8	00000000 (0)
000074ac	00000000 (0)
000074b0	00000000 (0)
000074b4	00000000 (0)
000074b8	00000000 (0)
000074bc	00000000 (0)
000074c0	00000000 (0)
000074c4	00000000 (0)
000074c8	00000000 (0)
000074cc	00000170 (368)
000074d0	00000000 (0)
000074d4	10000000 (268435456)
000074d8	00000000 (0)
000074dc	00000000 (0)
000074e0	00000000 (0)
000074e4	00000000 (0)
000074e8	00000000 (0)
000074ec	00000000 (0)

HDMI block at 0x7800:
00007800	00000011 (17)
00007804	00010000 (65536)
00007808	00030010 (196624)
0000780c	00001000 (4096)
00007810	00000031 (49)
00007814	00000033 (51)
00007818	00000202 (514)
0000781c	00000000 (0)
00007820	00000000 (0)
00007824	00000000 (0)
00007828	00000000 (0)
0000782c	00000000 (0)
00007830	00000000 (0)
00007834	00000000 (0)
00007838	00000000 (0)
0000783c	00000000 (0)
00007840	00000000 (0)
00007844	00000000 (0)
00007848	00000000 (0)
0000784c	00000000 (0)
00007850	00000000 (0)
00007854	00080063 (524387)
00007858	00000004 (4)
0000785c	00000000 (0)
00007860	02000000 (33554432)
00007864	00000000 (0)
00007868	00000000 (0)
0000786c	00000000 (0)
00007870	00000000 (0)
00007874	00000000 (0)
00007878	00000000 (0)
0000787c	00000000 (0)
00007880	00000000 (0)
00007884	00000000 (0)
00007888	00000000 (0)
0000788c	00000000 (0)
00007890	00000000 (0)
00007894	00000000 (0)
00007898	00000000 (0)
0000789c	00000000 (0)
000078a0	00000000 (0)
000078a4	00000000 (0)
000078a8	00000000 (0)
000078ac	1220a000 (304128000)
000078b0	00001000 (4096)
000078b4	14244000 (337920000)
000078b8	00001880 (6272)
000078bc	1220a000 (304128000)
000078c0	00001800 (6144)
000078c4	0cb19000 (212963328)
000078c8	00001800 (6144)
000078cc	00000170 (368)
000078d0	00000000 (0)
000078d4	02000000 (33554432)
000078d8	00000002 (2)
000078dc	00001100 (4352)
000078e0	00ffffff (16777215)
000078e4	007fffff (8388607)
000078e8	00000001 (1)
000078ec	00000001 (1)
Comment 9 Rafał Miłecki 2013-07-29 19:26:10 UTC 
@Kris: thank you for you debugging! I hope this is last debugging request.

Can you boot not working (bad) kernel, connect HDMI display and then type:

avivotool regset 0x0524 0x00249f00
avivotool regset 0x0528 0x00714be8
avivotool regset 0x0534 0x00000001

I hope this will resume audio on your card, but I just want to be sure, before asking Alex for getting more details on that.

If you could confirm that above 3 commands fix audio for you, it'd be great.
Comment 10 Kris Scott 2013-07-29 22:44:43 UTC 
Yes, those fixed it. Thank you very much.
Comment 11 Alex Deucher 2013-07-29 23:02:51 UTC 
Can you tell be the values of 0x7340, 0x7344, 0x520, and 0x530?
avivotool regmatch 0x7340
avivotool regmatch 0x7344
avivotool regmatch 0x520
avivotool regmatch 0x530
Comment 12 Kris Scott 2013-07-29 23:05:19 UTC 
0x7340	0x001b0018 (1769496)
0x7344	0x00000070 (112)
0x520	0x00000070 (112)
0x530	0x00000070 (112)
Comment 13 Kris Scott 2013-07-29 23:06:13 UTC 
That is also after I had changed the registers that Rafal asked me to change, if it makes any difference.
Comment 14 Alex Deucher 2013-07-29 23:17:01 UTC 
Can you boot back into the broken state and try this alternative fix:
avivotool regset 0x7344 0x00000170
Comment 15 Kris Scott 2013-07-30 15:17:48 UTC 
Tried it, that did not fix the sound.
Comment 16 Alex Deucher 2013-07-30 15:21:52 UTC 
Created attachment 83304 [details] [review]
fix

This patch should fix it.
Comment 17 Christian König 2013-07-30 15:33:55 UTC 
It's just a guess, but could you just try the following (without any patches):

avivotool regset 0x0514 0x00249f00

Does that helps as well?
Comment 18 Kris Scott 2013-07-31 12:31:41 UTC 
Alex: Checking in to confirm that your patch fixed the problem.

Christian: Changing that register had no effect.

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