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drm/i915: Show dmc debug registers on CFL and GLK

PATCH In review David Weinehall 4 participants 9 messages Mar 15, 2018 – Mar 19, 2018

Subsystems (2)
DRM drivers Intel i915
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David Weinehall

author
#0 lore raw

PATCH 1/1 drm/i915: Show dmc debug registers on CFL and GLK

Since Coffee Lake uses the Kaby Lake DMC it's a safe bet that the debug registers are the same. I haven't double-checked that the GLK DMC uses the same registers as BXT, but it seems as good of a guess as any.

Signed-off-by David Weinehall <[email protected]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
drivers/gpu/drm/i915/i915_debugfs.c +3 -2
index c4cc8fef11a0..dad0776d58b4 100644
@@ -2813,13 +2813,14 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
 		   CSR_VERSION_MINOR(csr->version));
 
-	if (IS_KABYLAKE(dev_priv) ||
+	if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
 	    (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(SKL_CSR_DC3_DC5_COUNT));
 		seq_printf(m, "DC5 -> DC6 count: %d\n",
 			   I915_READ(SKL_CSR_DC5_DC6_COUNT));
-	} else if (IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
+	} else if (IS_GEMINILAKE(dev_priv) ||
+	           IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(BXT_CSR_DC3_DC5_COUNT));
 	}
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#1 lore raw

✗ Fi.CI.BAT: failure for drm/i915: Show dmc debug registers on CFL and GLK

== Series Details ==

== Series Details ==

Series: drm/i915: Show dmc debug registers on CFL and GLK
URL : https://patchwork.freedesktop.org/series/40031/
State : failure

== Summary ==

CHK include/config/kernel.release

  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CHK     include/generated/bounds.h
  CHK     include/generated/timeconst.h
  CHK     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
  DESCEND  objtool
  CHK     scripts/mod/devicetable-offsets.h
  CHK     include/generated/compile.h
  CHK     kernel/config_data.h
  CC [M]  drivers/gpu/drm/i915/i915_debugfs.o
drivers/gpu/drm/i915/i915_debugfs.c: In function ‘i915_dmc_info’:
drivers/gpu/drm/i915/i915_debugfs.c:2822:34: error: suggest parentheses around ‘&&’ within ‘||’ [-Werror=parentheses]
             IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {

cc1: all warnings being treated as errors
scripts/Makefile.build:324: recipe for target 'drivers/gpu/drm/i915/i915_debugfs.o' failed make[4]: *** [drivers/gpu/drm/i915/i915_debugfs.o] Error 1 scripts/Makefile.build:583: recipe for target 'drivers/gpu/drm/i915' failed make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:583: recipe for target 'drivers/gpu/drm' failed make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:583: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1051: recipe for target 'drivers' failed
make: *** [drivers] Error 2

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author
#2 lore raw

PATCH 1/1 drm/i915: Show dmc debug registers on CFL and GLK

In reply to David Weinehall

Since Coffee Lake uses the Kaby Lake DMC it's a safe bet that the debug registers are the same. I haven't double-checked that the GLK DMC uses the same registers as BXT, but it seems as good of a guess as any.

v2: Add parentheses to silence warning

Signed-off-by David Weinehall <[email protected]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
drivers/gpu/drm/i915/i915_debugfs.c +3 -2
index c4cc8fef11a0..87be104347cd 100644
@@ -2813,13 +2813,14 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
 		   CSR_VERSION_MINOR(csr->version));
 
-	if (IS_KABYLAKE(dev_priv) ||
+	if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
 	    (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(SKL_CSR_DC3_DC5_COUNT));
 		seq_printf(m, "DC5 -> DC6 count: %d\n",
 			   I915_READ(SKL_CSR_DC5_DC6_COUNT));
-	} else if (IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
+	} else if (IS_GEMINILAKE(dev_priv) ||
+	           (IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4))) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(BXT_CSR_DC3_DC5_COUNT));
 	}
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CI
#3 lore raw

✓ Fi.CI.BAT: success for drm/i915: Show dmc debug registers on CFL and GLK (rev2)

In reply to David Weinehall
== Series Details ==

== Series Details ==

Series: drm/i915: Show dmc debug registers on CFL and GLK (rev2)
URL : https://patchwork.freedesktop.org/series/40031/
State : success

== Summary ==

Series 40031v2 drm/i915: Show dmc debug registers on CFL and GLK
https://patchwork.freedesktop.org/api/1.0/series/40031/revisions/2/mbox/

---- Known issues:

Test debugfs_test:

        Subgroup read_all_entries:
                pass       -> INCOMPLETE (fi-snb-2520m) fdo#103713
Test gem_mmap_gtt:
        Subgroup basic-small-bo-tiledx:
                fail       -> PASS       (fi-gdg-551) fdo#102575

fdo#103713 https://bugs.freedesktop.org/show_bug.cgi?id=103713
fdo#102575 https://bugs.freedesktop.org/show_bug.cgi?id=102575

fi-bdw-5557u     total:285  pass:264  dwarn:0   dfail:0   fail:0   skip:21  time:435s
fi-bdw-gvtdvm    total:285  pass:261  dwarn:0   dfail:0   fail:0   skip:24  time:444s
fi-blb-e6850     total:285  pass:220  dwarn:1   dfail:0   fail:0   skip:64  time:385s
fi-bsw-n3050     total:285  pass:239  dwarn:0   dfail:0   fail:0   skip:46  time:536s
fi-bwr-2160      total:285  pass:180  dwarn:0   dfail:0   fail:0   skip:105 time:298s
fi-bxt-j4205     total:285  pass:256  dwarn:0   dfail:0   fail:0   skip:29  time:514s
fi-byt-j1900     total:285  pass:250  dwarn:0   dfail:0   fail:0   skip:35  time:517s
fi-byt-n2820     total:285  pass:246  dwarn:0   dfail:0   fail:0   skip:39  time:503s
fi-cfl-8700k     total:285  pass:257  dwarn:0   dfail:0   fail:0   skip:28  time:413s
fi-cfl-s2        total:285  pass:259  dwarn:0   dfail:0   fail:0   skip:26  time:578s
fi-cfl-u         total:285  pass:259  dwarn:0   dfail:0   fail:0   skip:26  time:513s
fi-cnl-drrs      total:285  pass:254  dwarn:3   dfail:0   fail:0   skip:28  time:524s
fi-cnl-y3        total:285  pass:259  dwarn:0   dfail:0   fail:0   skip:26  time:588s
fi-elk-e7500     total:285  pass:226  dwarn:0   dfail:0   fail:0   skip:59  time:421s
fi-gdg-551       total:285  pass:177  dwarn:0   dfail:0   fail:0   skip:108 time:318s
fi-glk-1         total:285  pass:257  dwarn:0   dfail:0   fail:0   skip:28  time:538s
fi-hsw-4770      total:285  pass:258  dwarn:0   dfail:0   fail:0   skip:27  time:404s
fi-ilk-650       total:285  pass:225  dwarn:0   dfail:0   fail:0   skip:60  time:421s
fi-ivb-3520m     total:285  pass:256  dwarn:0   dfail:0   fail:0   skip:29  time:475s
fi-ivb-3770      total:285  pass:252  dwarn:0   dfail:0   fail:0   skip:33  time:428s
fi-kbl-7500u     total:285  pass:260  dwarn:1   dfail:0   fail:0   skip:24  time:477s
fi-kbl-7567u     total:285  pass:265  dwarn:0   dfail:0   fail:0   skip:20  time:472s
fi-kbl-r         total:285  pass:258  dwarn:0   dfail:0   fail:0   skip:27  time:514s
fi-pnv-d510      total:285  pass:219  dwarn:1   dfail:0   fail:0   skip:65  time:656s
fi-skl-6260u     total:285  pass:265  dwarn:0   dfail:0   fail:0   skip:20  time:444s
fi-skl-6600u     total:285  pass:258  dwarn:0   dfail:0   fail:0   skip:27  time:532s
fi-skl-6700hq    total:285  pass:259  dwarn:0   dfail:0   fail:0   skip:26  time:541s
fi-skl-6700k2    total:285  pass:261  dwarn:0   dfail:0   fail:0   skip:24  time:507s
fi-skl-6770hq    total:285  pass:265  dwarn:0   dfail:0   fail:0   skip:20  time:506s
fi-skl-guc       total:285  pass:257  dwarn:0   dfail:0   fail:0   skip:28  time:428s
fi-skl-gvtdvm    total:285  pass:262  dwarn:0   dfail:0   fail:0   skip:23  time:454s
fi-snb-2520m     total:3    pass:2    dwarn:0   dfail:0   fail:0   skip:0  
fi-snb-2600      total:285  pass:245  dwarn:0   dfail:0   fail:0   skip:40  time:405s

95626f201526d97b6f284b397fd73c8a2d514ff4 drm-tip: 2018y-03m-15d-11h-01m-14s UTC integration manifest 7800a68bfb39 drm/i915: Show dmc debug registers on CFL and GLK

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_8365/issues.html
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CI
#4 lore raw

✗ Fi.CI.IGT: failure for drm/i915: Show dmc debug registers on CFL and GLK (rev2)

In reply to David Weinehall
== Series Details ==

== Series Details ==

Series: drm/i915: Show dmc debug registers on CFL and GLK (rev2)
URL : https://patchwork.freedesktop.org/series/40031/
State : failure

== Summary ==

---- Possible new issues:

Test kms_frontbuffer_tracking:

        Subgroup fbc-modesetfrombusy:
                pass       -> FAIL       (shard-apl)

---- Known issues:

Test gem_eio:

        Subgroup in-flight-external:
                incomplete -> PASS       (shard-apl) fdo#105341 +1
Test kms_flip:
        Subgroup 2x-plain-flip-fb-recreate:
                pass       -> FAIL       (shard-hsw) fdo#100368
Test kms_sysfs_edid_timing:
                pass       -> WARN       (shard-apl) fdo#100047

fdo#105341 https://bugs.freedesktop.org/show_bug.cgi?id=105341
fdo#100368 https://bugs.freedesktop.org/show_bug.cgi?id=100368
fdo#100047 https://bugs.freedesktop.org/show_bug.cgi?id=100047

shard-apl        total:3399 pass:1795 dwarn:1   dfail:0   fail:8   skip:1592 time:12040s
shard-hsw        total:3442 pass:1767 dwarn:1   dfail:0   fail:2   skip:1671 time:11814s
shard-snb        total:3442 pass:1358 dwarn:1   dfail:0   fail:2   skip:2081 time:7201s

Blacklisted hosts:
shard-kbl total:2129 pass:1187 dwarn:4 dfail:0 fail:5 skip:932 time:5546s

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_8365/shards.html
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maintainer
#5 lore raw
In reply to David Weinehall
Quoted 4 lines · David Weinehall

Since Coffee Lake uses the Kaby Lake DMC it's a safe bet that the debug registers are the same. I haven't double-checked that the GLK DMC uses the same registers as BXT, but it seems as good of a guess as any.

It would be good to check. Last time that I checked we were getting deep PC residencies but these registers were zeroed on CFL.

Also this bit confuses many people since it is not a proper residency counter :/

Quoted 34 lines
Signed-off-by David Weinehall <[email protected]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
drivers/gpu/drm/i915/i915_debugfs.c +3 -2
index c4cc8fef11a0..dad0776d58b4 100644
@@ -2813,13 +2813,14 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
 		   CSR_VERSION_MINOR(csr->version));
 
-	if (IS_KABYLAKE(dev_priv) ||
+	if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
 	    (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(SKL_CSR_DC3_DC5_COUNT));
 		seq_printf(m, "DC5 -> DC6 count: %d\n",
 			   I915_READ(SKL_CSR_DC5_DC6_COUNT));
-	} else if (IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
+	} else if (IS_GEMINILAKE(dev_priv) ||
+	           IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(BXT_CSR_DC3_DC5_COUNT));
 	}
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author
#6 lore raw
Quoted 11 lines · Rodrigo Vivi
Quoted 4 lines · David Weinehall

Since Coffee Lake uses the Kaby Lake DMC it's a safe bet that the debug registers are the same. I haven't double-checked that the GLK DMC uses the same registers as BXT, but it seems as good of a guess as any.

It would be good to check. Last time that I checked we were getting deep PC residencies but these registers were zeroed on CFL.

Also this bit confuses many people since it is not a proper residency counter :/

I'll run some tests on all platforms that are supposed to be supported by this, and compare the behaviour.

Quoted 31 lines
Quoted 31 lines
Signed-off-by David Weinehall <[email protected]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
drivers/gpu/drm/i915/i915_debugfs.c +3 -2
index c4cc8fef11a0..dad0776d58b4 100644
@@ -2813,13 +2813,14 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
 		   CSR_VERSION_MINOR(csr->version));
 
-	if (IS_KABYLAKE(dev_priv) ||
+	if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
 	    (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(SKL_CSR_DC3_DC5_COUNT));
 		seq_printf(m, "DC5 -> DC6 count: %d\n",
 			   I915_READ(SKL_CSR_DC5_DC6_COUNT));
-	} else if (IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
+	} else if (IS_GEMINILAKE(dev_priv) ||
+	           IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {
 		seq_printf(m, "DC3 -> DC5 count: %d\n",
 			   I915_READ(BXT_CSR_DC3_DC5_COUNT));
 	}
Signature · 1 line
2.16.2
Quoted 4 lines
Quoted 4 lines

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build bot
#7 lore raw
In reply to David Weinehall
Thank you for the patch! Perhaps something to improve:

Hi David,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on v4.16-rc4]
[also build test WARNING on next-20180316]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/David-Weinehall/drm-i915-Show-dmc-debug-registers-on-CFL-and-GLK/20180318-082134
config: x86_64-randconfig-x002-201811 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:

        # save the attached .config to linux build tree
        make ARCH=x86_64

All warnings (new ones prefixed by >>):

drivers/gpu/drm/i915/i915_debugfs.c: In function 'i915_dmc_info':

>> drivers/gpu/drm/i915/i915_debugfs.c:2785:34: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
                IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {

vim +2785 drivers/gpu/drm/i915/i915_debugfs.c

2756
2757 static int i915_dmc_info(struct seq_file *m, void *unused)
2758 {
2759 struct drm_i915_private *dev_priv = node_to_i915(m->private);
2760 struct intel_csr *csr;
2761
2762 if (!HAS_CSR(dev_priv))
2763 return -ENODEV;
2764
2765 csr = &dev_priv->csr;
2766
2767 intel_runtime_pm_get(dev_priv);
2768
2769 seq_printf(m, "fw loaded: %s\n", yesno(csr->dmc_payload != NULL));
2770 seq_printf(m, "path: %s\n", csr->fw_path);
2771
2772 if (!csr->dmc_payload)
2773 goto out;
2774
2775 seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
2776 CSR_VERSION_MINOR(csr->version));
2777
2778 if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
2779 (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
2780 seq_printf(m, "DC3 -> DC5 count: %d\n",
2781 I915_READ(SKL_CSR_DC3_DC5_COUNT));
2782 seq_printf(m, "DC5 -> DC6 count: %d\n",
2783 I915_READ(SKL_CSR_DC5_DC6_COUNT));
2784 } else if (IS_GEMINILAKE(dev_priv) ||

> 2785		           IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {

2786 seq_printf(m, "DC3 -> DC5 count: %d\n",
2787 I915_READ(BXT_CSR_DC3_DC5_COUNT));
2788 }
2789
2790 out:
2791 seq_printf(m, "program base: 0x%08x\n", I915_READ(CSR_PROGRAM(0)));
2792 seq_printf(m, "ssp base: 0x%08x\n", I915_READ(CSR_SSP_BASE));
2793 seq_printf(m, "htp: 0x%08x\n", I915_READ(CSR_HTP_SKL));
2794
2795 intel_runtime_pm_put(dev_priv);
2796
2797 return 0;
2798 }
2799

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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build bot
#8 lore raw
In reply to David Weinehall
Thank you for the patch! Yet something to improve:

Hi David,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16-rc4]
[also build test ERROR on next-20180316]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/David-Weinehall/drm-i915-Show-dmc-debug-registers-on-CFL-and-GLK/20180318-082134
config: i386-randconfig-x075-201811 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce:

        # save the attached .config to linux build tree
        make ARCH=i386

All errors (new ones prefixed by >>):

drivers/gpu/drm/i915/i915_debugfs.c: In function 'i915_dmc_info':

>> drivers/gpu/drm/i915/i915_debugfs.c:2785:34: error: suggest parentheses around '&&' within '||' [-Werror=parentheses]
                IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {

cc1: all warnings being treated as errors

vim +2785 drivers/gpu/drm/i915/i915_debugfs.c

2756
2757 static int i915_dmc_info(struct seq_file *m, void *unused)
2758 {
2759 struct drm_i915_private *dev_priv = node_to_i915(m->private);
2760 struct intel_csr *csr;
2761
2762 if (!HAS_CSR(dev_priv))
2763 return -ENODEV;
2764
2765 csr = &dev_priv->csr;
2766
2767 intel_runtime_pm_get(dev_priv);
2768
2769 seq_printf(m, "fw loaded: %s\n", yesno(csr->dmc_payload != NULL));
2770 seq_printf(m, "path: %s\n", csr->fw_path);
2771
2772 if (!csr->dmc_payload)
2773 goto out;
2774
2775 seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
2776 CSR_VERSION_MINOR(csr->version));
2777
2778 if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
2779 (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
2780 seq_printf(m, "DC3 -> DC5 count: %d\n",
2781 I915_READ(SKL_CSR_DC3_DC5_COUNT));
2782 seq_printf(m, "DC5 -> DC6 count: %d\n",
2783 I915_READ(SKL_CSR_DC5_DC6_COUNT));
2784 } else if (IS_GEMINILAKE(dev_priv) ||

> 2785		           IS_BROXTON(dev_priv) && csr->version >= CSR_VERSION(1, 4)) {

2786 seq_printf(m, "DC3 -> DC5 count: %d\n",
2787 I915_READ(BXT_CSR_DC3_DC5_COUNT));
2788 }
2789
2790 out:
2791 seq_printf(m, "program base: 0x%08x\n", I915_READ(CSR_PROGRAM(0)));
2792 seq_printf(m, "ssp base: 0x%08x\n", I915_READ(CSR_SSP_BASE));
2793 seq_printf(m, "htp: 0x%08x\n", I915_READ(CSR_HTP_SKL));
2794
2795 intel_runtime_pm_put(dev_priv);
2796
2797 return 0;
2798 }
2799

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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