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SubjectRe: [resend] i915: high power consumption after suspend/resume
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On Thu, Nov 5, 2009 at 11:28 AM, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> On Wed, 4 Nov 2009 23:00:14 -0500
> Andrew Lutomirski <luto@mit.edu> wrote:
>> so it looks like it's not a register setting after all.  Maybe my BIOS
>> leaves the renderer in some weird state.
>
> Note that the register dumping tool doesn't capture everything.  If you
> really want to do some detective work you could dump the whole MMIO
> space and compare differences.  You should be able to find definitions
> for many of the reg offsets in the docs at intellinuxgraphics.org,
> maybe there's something we don't dump that's changing and that explains
> your power consumption changes.

Here's the diff for another i915_wedged test. - is high power and +
is low power.

--- /tmp/regs_pre_wedge 2009-11-06 14:46:44.042345316 -0500
+++ /tmp/regs_post_wedge 2009-11-06 14:47:14.798345239 -0500
@@ -45,8 +45,8 @@
(II): PP_DIVISOR: 0x003e7f03
(II): PFIT_CONTROL: 0x00000000
(II): PFIT_PGM_RATIOS: 0x00000000
-(II): PORT_HOTPLUG_EN: 0x3e040320
-(II): PORT_HOTPLUG_STAT: 0x38560800
+(II): PORT_HOTPLUG_EN: 0x3e040200
+(II): PORT_HOTPLUG_STAT: 0x38000300
(II): DSPACNTR: 0x00000000 (disabled, pipe A)
(II): DSPASTRIDE: 0x00000000 (0 bytes)
(II): DSPAPOS: 0x00000000 (0, 0)
@@ -179,9 +179,9 @@
(II): AUD_CONFIG: 0x00000004
(II): AUD_HDMIW_STATUS: 0x00000000
(II): AUD_CONV_CHCNT: 0x00000000
-(II): VIDEO_DIP_CTL: 0x20000602
+(II): VIDEO_DIP_CTL: 0x20000603
(II): AUD_PINW_CNTR: 0x00000140
-(II): AUD_CNTL_ST: 0x00002042
+(II): AUD_CNTL_ST: 0x00002063
(II): AUD_PIN_CAP: 0x00000094
(II): AUD_PINW_CAP: 0x004073bd
(II): AUD_PINW_UNSOLRESP: 0x00000000
@@ -2285,8 +2285,8 @@
00002024: 00000000
00002028: 00000900
0000202C: 00000000
-00002030: 00005B10
-00002034: 07205B10
+00002030: 00000000
+00002034: 02000000
00002038: 02000000
0000203C: 0001F001
00002040: 00000000
@@ -2302,7 +2302,7 @@
00002068: 01000000
0000206C: FFFFFFFE
00002070: 0001E000
-00002074: 07205B10
+00002074: 02000000
00002078: 02005B10
0000207C: FFFFFFFF
00002080: 01FFF000
@@ -2316,7 +2316,7 @@
000020A0: 00028053
000020A4: 00000000
000020A8: FFFC5FAE
-000020AC: 00020000
+000020AC: 00000000
000020B0: 00000000
000020B4: FFFFFF05
000020B8: 00000001
@@ -2407,7 +2407,7 @@
0000220C: 10800001
00002210: 00000000
00002214: 00000000
-00002218: 07205B10
+00002218: 02000000
0000221C: 00000000
00002220: 00000000
00002224: 00000000
@@ -2487,8 +2487,8 @@
0000234C: 00000000
00002350: 2364819D
00002354: 00000000
-00002358: 55A00000
-0000235C: 56C9F19D
+00002358: A9000000
+0000235C: 5892DB63
00002360: 00000000
00002364: 00000000
00002368: 00000000
@@ -16935,7 +16935,7 @@
0001050C: 00000000
00010510: 00000000
00010514: 00000000
-00010518: 25280A0B
+00010518: 25270A0B
0001051C: 00000000
00010520: 00000000
00010524: 00000000
@@ -17169,7 +17169,7 @@
000108B4: 00000024
000108B8: 00000000
000108BC: 00000000
-000108C0: 00003B37
+000108C0: 00003937
000108C4: 00000807
000108C8: 0000211F
000108CC: 00000000
@@ -17577,7 +17577,7 @@
00010F14: 00000000
00010F18: 00000000
00010F1C: 00000000
-00010F20: 20024808
+00010F20: 28036A8D
00010F24: 00000000
00010F28: 00000000
00010F2C: 00000000
@@ -17633,9 +17633,9 @@
00010FF4: 00000000
00010FF8: 00000000
00010FFC: 000007D0
-00011000: 0093007A
-00011004: 007C0400
-00011008: 0000007C
+00011000: 0093007F
+00011004: 00FF0000
+00011008: 000000FF
0001100C: 00000000
00011010: 80000009
00011014: 00000000
@@ -17747,7 +17747,7 @@
000111BC: 00000000
000111C0: 03030100
000111C4: 0A030A03
-000111C8: 00000020
+000111C8: 00000021
000111CC: 00000017
000111D0: 00000000
000111D4: 00000000
@@ -17891,9 +17891,9 @@
000113FC: 00000000
00011400: 00113300
00011404: 00000000
-00011408: 0FFEFFFF
+00011408: 00047E7F
0001140C: 80010880
-00011410: 60002C59
+00011410: 40002C59
00011414: 24049801
00011418: 00000000
0001141C: 00000000
@@ -18068,7 +18068,7 @@
000116C0: 00000000
000116C4: 00000000
000116C8: 00000000
-000116CC: 0000007C
+000116CC: 000000FF
000116D0: 00000000
000116D4: 00000400
000116D8: 00000000
@@ -99621,8 +99621,8 @@
00061104: 00000000
00061108: 00000000
0006110C: 00000000
-00061110: 3E040320
-00061114: 38560800
+00061110: 3E040200
+00061114: 38000300
00061118: 00000000
0006111C: 00000000
00061120: 00000000
@@ -99645,7 +99645,7 @@
00061164: 00000000
00061168: 00000000
0006116C: 00000000
-00061170: 20000602
+00061170: 20000603
00061174: 00000000
00061178: 00000000
0006117C: 00000000
@@ -99705,7 +99705,7 @@
00061254: 0CF80CF8
00061258: 00000000
0006125C: 00000000
-00061260: 00000002
+00061260: 00000003
00061264: 00000000
00061268: 00000000
0006126C: 00000000
@@ -100622,7 +100622,7 @@
000620A8: 00000001
000620AC: 00000002
000620B0: 00000140
-000620B4: 00002042
+000620B4: 00002063
000620B8: 00000000
000620BC: 18560010
000620C0: 00000000
@@ -115937,7 +115937,7 @@
00070FF4: 00000000
00070FF8: 00000000
00070FFC: 00000000
-00071000: 00000172
+00071000: 00000286
00071004: 834C0384
00071008: C0000000
0007100C: 00000000
@@ -115953,9 +115953,9 @@
00071034: 00000000
00071038: 00000000
0007103C: 00000000
-00071040: 0001218C
+00071040: 00012784
00071044: 00000004
-00071048: 56CAB03B
+00071048: 5893BC94
0007104C: 4C8BF9B3
00071050: 00000000
00071054: 00000000
Here's what the docs say:


2030, 2034: ring buffer head/tail
2074: Active head pointer register
20AC: Interrupt Status Register (ISR)
2218: Reserved
2358, 235C: TIMESTAMP

1xxxx: MCHBAR aperture
61110: PORT_HOTPLU_EN
61114: PORT_HOTPLU_STAT
61170: UDI_IF_CTL (UDI InfoFrame Control)

61260: BLM_HIST_CTL (Image BLM Histogram Control Register)

620B4: Reserved (for High Definition?)

71000: PIPEB_DSL (Pipe B Display Scan Line Count)
71040: PIPEBFRAMEH: Pipe B Frame Count High
71048: Reserved

Any ideas?

Thanks,
Andy
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