[Intel-gfx] [PATCH 0/2] drm/i915/xelpd: Enabling dithering after the CC1

[Intel-gfx] [PATCH 0/2] drm/i915/xelpd: Enabling dithering after the CC1

[Bhanuprakash Modem]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Bhanuprakash Modem (1):
  drm/i915/display/debug: Expose Dither status via debugfs

Nischal Varide (1):
  drm/i915/xelpd: Enabling dithering after the CC1

 drivers/gpu/drm/i915/display/intel_color.c    | 15 +++++++++
 drivers/gpu/drm/i915/display/intel_display.c  |  7 +++-
 .../drm/i915/display/intel_display_debugfs.c  | 32 +++++++++++++++++++
 drivers/gpu/drm/i915/i915_reg.h               |  3 +-
 4 files changed, 55 insertions(+), 2 deletions(-)

--
2.20.1

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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/90594/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
41e126e0ef3b drm/i915/xelpd: Enabling dithering after the CC1
-:27: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp == 36'
#27: FILE: drivers/gpu/drm/i915/display/intel_color.c:1614:
+		if (!crtc_state->dither_force_disable &&
+		    (crtc_state->pipe_bpp == 36))

-:60: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp != 36'
#60: FILE: drivers/gpu/drm/i915/display/intel_display.c:5749:
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))

total: 0 errors, 0 warnings, 2 checks, 55 lines checked
f4a00c25cb0b drm/i915/display/debug: Expose Dither status via debugfs
-:43: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#43: FILE: drivers/gpu/drm/i915/display/intel_display_debugfs.c:2179:
+	seq_printf(m, "Dither_CC1: %u\n",
+		(crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);

total: 0 errors, 0 warnings, 1 checks, 43 lines checked


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[Intel-gfx] ✗ Fi.CI.SPARSE: warning for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/90594/
State : warning

== Summary ==

$ dim sparse --fast origin/drm-tip
Sparse version: v0.6.2
Fast mode used, each commit won't be checked separately.
-
+drivers/gpu/drm/i915/display/intel_display.c:1887:21:    expected struct i915_vma *[assigned] vma
+drivers/gpu/drm/i915/display/intel_display.c:1887:21:    got void [noderef] __iomem *[assigned] iomem
+drivers/gpu/drm/i915/display/intel_display.c:1887:21: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:27:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:27:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:27:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:32:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:32:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:49:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:49:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:49:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:56:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_engine_stats.h:56:9: warning: trying to copy expression type 31
+drivers/gpu/drm/i915/gt/intel_reset.c:1328:5: warning: context imbalance in 'intel_gt_reset_trylock' - different lock contexts for basic block
+drivers/gpu/drm/i915/gt/intel_ring_submission.c:1207:24: warning: Using plain integer as NULL pointer
+drivers/gpu/drm/i915/i915_perf.c:1434:15: warning: memset with byte count of 16777216
+drivers/gpu/drm/i915/i915_perf.c:1488:15: warning: memset with byte count of 16777216
+./include/asm-generic/bitops/find.h:112:45: warning: shift count is negative (-262080)
+./include/asm-generic/bitops/find.h:32:31: warning: shift count is negative (-262080)
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_read16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_read32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_read64' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_read8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_write16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_write32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'fwtable_write8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_read16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_read32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_read64' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_read8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_write16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_write32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen11_fwtable_write8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_read16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_read32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_read64' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_read8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_write16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_write32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen12_fwtable_write8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_read16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_read32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_read64' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_read8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_write16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_write32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen6_write8' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen8_write16' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen8_write32' - different lock contexts for basic block
+./include/linux/spinlock.h:409:9: warning: context imbalance in 'gen8_write8' - different lock contexts for basic block


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[Intel-gfx] ✓ Fi.CI.BAT: success for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

[-- Attachment #1.1: Type: text/plain, Size: 7397 bytes --]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/90594/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_10133 -> Patchwork_20202
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/index.html

Known issues
------------

  Here are the changes found in Patchwork_20202 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@core_hotunplug@unbind-rebind:
    - fi-bdw-5557u:       NOTRUN -> [WARN][1] ([i915#2283])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-bdw-5557u/igt@core_hotunplug@unbind-rebind.html

  * igt@gem_exec_suspend@basic-s3:
    - fi-tgl-u2:          [PASS][2] -> [FAIL][3] ([i915#1888]) +1 similar issue
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-tgl-u2/igt@gem_exec_suspend@basic-s3.html
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-tgl-u2/igt@gem_exec_suspend@basic-s3.html

  * igt@i915_selftest@live@execlists:
    - fi-bdw-5557u:       NOTRUN -> [DMESG-FAIL][4] ([i915#3462])
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-bdw-5557u/igt@i915_selftest@live@execlists.html

  * igt@i915_selftest@live@requests:
    - fi-kbl-soraka:      [PASS][5] -> [INCOMPLETE][6] ([i915#2782])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-kbl-soraka/igt@i915_selftest@live@requests.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-kbl-soraka/igt@i915_selftest@live@requests.html

  * igt@kms_psr@cursor_plane_move:
    - fi-bdw-5557u:       NOTRUN -> [SKIP][7] ([fdo#109271]) +5 similar issues
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-bdw-5557u/igt@kms_psr@cursor_plane_move.html

  
#### Possible fixes ####

  * igt@kms_frontbuffer_tracking@basic:
    - fi-icl-u2:          [FAIL][8] ([i915#49]) -> [PASS][9]
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-icl-u2/igt@kms_frontbuffer_tracking@basic.html
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-icl-u2/igt@kms_frontbuffer_tracking@basic.html

  
#### Warnings ####

  * igt@i915_selftest@live@execlists:
    - fi-tgl-u2:          [INCOMPLETE][10] ([i915#3462]) -> [DMESG-FAIL][11] ([i915#3462])
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-tgl-u2/igt@i915_selftest@live@execlists.html
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-tgl-u2/igt@i915_selftest@live@execlists.html

  * igt@runner@aborted:
    - fi-kbl-x1275:       [FAIL][12] ([i915#1436] / [i915#3363]) -> [FAIL][13] ([i915#1436] / [i915#2426] / [i915#3363])
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-kbl-x1275/igt@runner@aborted.html
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-kbl-x1275/igt@runner@aborted.html
    - fi-glk-dsi:         [FAIL][14] ([i915#2426] / [i915#3363] / [k.org#202321]) -> [FAIL][15] ([i915#3363] / [k.org#202321])
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-glk-dsi/igt@runner@aborted.html
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-glk-dsi/igt@runner@aborted.html
    - fi-bdw-5557u:       [FAIL][16] ([i915#1602] / [i915#2029]) -> [FAIL][17] ([i915#3462])
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-bdw-5557u/igt@runner@aborted.html
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-bdw-5557u/igt@runner@aborted.html
    - fi-kbl-soraka:      [FAIL][18] ([i915#1436] / [i915#2426] / [i915#3363]) -> [FAIL][19] ([i915#1436] / [i915#3363])
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-kbl-soraka/igt@runner@aborted.html
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-kbl-soraka/igt@runner@aborted.html
    - fi-cml-u2:          [FAIL][20] ([i915#2082] / [i915#2426] / [i915#3363] / [i915#3462]) -> [FAIL][21] ([i915#3363] / [i915#3462])
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-cml-u2/igt@runner@aborted.html
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-cml-u2/igt@runner@aborted.html
    - fi-cfl-guc:         [FAIL][22] ([i915#3363]) -> [FAIL][23] ([i915#2426] / [i915#3363])
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/fi-cfl-guc/igt@runner@aborted.html
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/fi-cfl-guc/igt@runner@aborted.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109285]: https://bugs.freedesktop.org/show_bug.cgi?id=109285
  [fdo#111827]: https://bugs.freedesktop.org/show_bug.cgi?id=111827
  [i915#1072]: https://gitlab.freedesktop.org/drm/intel/issues/1072
  [i915#1436]: https://gitlab.freedesktop.org/drm/intel/issues/1436
  [i915#1602]: https://gitlab.freedesktop.org/drm/intel/issues/1602
  [i915#1888]: https://gitlab.freedesktop.org/drm/intel/issues/1888
  [i915#2029]: https://gitlab.freedesktop.org/drm/intel/issues/2029
  [i915#2082]: https://gitlab.freedesktop.org/drm/intel/issues/2082
  [i915#2190]: https://gitlab.freedesktop.org/drm/intel/issues/2190
  [i915#2283]: https://gitlab.freedesktop.org/drm/intel/issues/2283
  [i915#2426]: https://gitlab.freedesktop.org/drm/intel/issues/2426
  [i915#2782]: https://gitlab.freedesktop.org/drm/intel/issues/2782
  [i915#2932]: https://gitlab.freedesktop.org/drm/intel/issues/2932
  [i915#2966]: https://gitlab.freedesktop.org/drm/intel/issues/2966
  [i915#3012]: https://gitlab.freedesktop.org/drm/intel/issues/3012
  [i915#3276]: https://gitlab.freedesktop.org/drm/intel/issues/3276
  [i915#3277]: https://gitlab.freedesktop.org/drm/intel/issues/3277
  [i915#3282]: https://gitlab.freedesktop.org/drm/intel/issues/3282
  [i915#3283]: https://gitlab.freedesktop.org/drm/intel/issues/3283
  [i915#3291]: https://gitlab.freedesktop.org/drm/intel/issues/3291
  [i915#3301]: https://gitlab.freedesktop.org/drm/intel/issues/3301
  [i915#3363]: https://gitlab.freedesktop.org/drm/intel/issues/3363
  [i915#3462]: https://gitlab.freedesktop.org/drm/intel/issues/3462
  [i915#49]: https://gitlab.freedesktop.org/drm/intel/issues/49
  [i915#533]: https://gitlab.freedesktop.org/drm/intel/issues/533
  [k.org#202321]: https://bugzilla.kernel.org/show_bug.cgi?id=202321


Participating hosts (45 -> 41)
------------------------------

  Additional (1): fi-rkl-11500t 
  Missing    (5): fi-ilk-m540 fi-hsw-4200u fi-bsw-cyan fi-ctg-p8600 fi-bdw-samus 


Build changes
-------------

  * Linux: CI_DRM_10133 -> Patchwork_20202

  CI-20190529: 20190529
  CI_DRM_10133: 79cace2bbe3bb9cbff1aa14428adea42072b56b0 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_6092: d87087c321da07035d4f96d98c34e451b3ccb809 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_20202: f4a00c25cb0bf63792e9f2cde420725ad1233db3 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

f4a00c25cb0b drm/i915/display/debug: Expose Dither status via debugfs
41e126e0ef3b drm/i915/xelpd: Enabling dithering after the CC1

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/index.html

[-- Attachment #1.2: Type: text/html, Size: 8750 bytes --]

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[Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

[Bhanuprakash Modem]

From: Nischal Varide <nischal.varide@intel.com>

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Signed-off-by: Nischal Varide <nischal.varide@intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
 drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index dab892d2251b..4ad5bd849695 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1605,6 +1605,20 @@ static u32 icl_csc_mode(const struct intel_crtc_state *crtc_state)
 	return csc_mode;
 }
 
+static u32 dither_after_cc1_12bpc(const struct intel_crtc_state *crtc_state)
+{
+	u32 gamma_mode = crtc_state->gamma_mode;
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+
+	if (DISPLAY_VER(i915) >= 13) {
+		if (!crtc_state->dither_force_disable &&
+		    (crtc_state->pipe_bpp == 36))
+			gamma_mode |= GAMMA_MODE_DITHER_AFTER_CC1;
+	}
+
+	return gamma_mode;
+}
+
 static int icl_color_check(struct intel_crtc_state *crtc_state)
 {
 	int ret;
@@ -1615,6 +1629,7 @@ static int icl_color_check(struct intel_crtc_state *crtc_state)
 
 	crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
 
+	crtc_state->gamma_mode = dither_after_cc1_12bpc(crtc_state);
 	crtc_state->csc_mode = icl_csc_mode(crtc_state);
 
 	crtc_state->preload_luts = intel_can_preload_luts(crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 0bb2e582c87f..1a658bdaeab6 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5741,7 +5741,12 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
 		break;
 	}
 
-	if (crtc_state->dither)
+	/*
+	 * If 12bpc panel then, Enables dithering after the CC1 pipe
+	 * post color space conversion and not here
+	 */
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
 		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
 
 	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4dbe79009c0e..5700097475c0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6155,7 +6155,7 @@ enum {
 #define   PIPEMISC_DITHER_8_BPC		(0 << 5)
 #define   PIPEMISC_DITHER_10_BPC	(1 << 5)
 #define   PIPEMISC_DITHER_6_BPC		(2 << 5)
-#define   PIPEMISC_DITHER_12_BPC	(3 << 5)
+#define   PIPEMISC_DITHER_12_BPC	(4 << 5)
 #define   PIPEMISC_DITHER_ENABLE	(1 << 4)
 #define   PIPEMISC_DITHER_TYPE_MASK	(3 << 2)
 #define   PIPEMISC_DITHER_TYPE_SP	(0 << 2)
@@ -7726,6 +7726,7 @@ enum {
 #define  GAMMA_MODE_MODE_12BIT	(2 << 0)
 #define  GAMMA_MODE_MODE_SPLIT	(3 << 0) /* ivb-bdw */
 #define  GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED	(3 << 0) /* icl + */
+#define  GAMMA_MODE_DITHER_AFTER_CC1 (1 << 26)
 
 /* DMC */
 #define DMC_PROGRAM(i)		_MMIO(0x80000 + (i) * 4)
-- 
2.20.1

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Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

[Jani Nikula]

On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> From: Nischal Varide <nischal.varide@intel.com>
>
> If the panel is 12bpc then Dithering is not enabled in the Legacy
> dithering block , instead its Enabled after the C1 CC1 pipe post
> color space conversion.For a 6bpc pannel Dithering is enabled in
> Legacy block.
>
> Signed-off-by: Nischal Varide <nischal.varide@intel.com>

When you're sending someone else's patches, you need to add your own
Signed-off-by here.

> ---
>  drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
>  drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
>  drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
>  3 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
> index dab892d2251b..4ad5bd849695 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -1605,6 +1605,20 @@ static u32 icl_csc_mode(const struct intel_crtc_state *crtc_state)
>  	return csc_mode;
>  }
>  
> +static u32 dither_after_cc1_12bpc(const struct intel_crtc_state *crtc_state)
> +{
> +	u32 gamma_mode = crtc_state->gamma_mode;
> +	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
> +
> +	if (DISPLAY_VER(i915) >= 13) {
> +		if (!crtc_state->dither_force_disable &&
> +		    (crtc_state->pipe_bpp == 36))
> +			gamma_mode |= GAMMA_MODE_DITHER_AFTER_CC1;
> +	}
> +
> +	return gamma_mode;
> +}
> +
>  static int icl_color_check(struct intel_crtc_state *crtc_state)
>  {
>  	int ret;
> @@ -1615,6 +1629,7 @@ static int icl_color_check(struct intel_crtc_state *crtc_state)
>  
>  	crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
>  
> +	crtc_state->gamma_mode = dither_after_cc1_12bpc(crtc_state);

We don't really do the kind of thing where you need a sequence of calls
where one depends on the other, adding to the same state member. At a
glance, this just looks wrong, superficially overwriting the previously
set value. I'd just add the check at the end of icl_gamma_mode().

>  	crtc_state->csc_mode = icl_csc_mode(crtc_state);
>  
>  	crtc_state->preload_luts = intel_can_preload_luts(crtc_state);
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 0bb2e582c87f..1a658bdaeab6 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -5741,7 +5741,12 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
>  		break;
>  	}
>  
> -	if (crtc_state->dither)
> +	/*
> +	 * If 12bpc panel then, Enables dithering after the CC1 pipe
> +	 * post color space conversion and not here
> +	 */
> +
> +	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))

This now duplicates the pipe_bpp condition in two places, which seems a
bit fragile. Maybe the check should be on gamma_mode? It would remove
the need for the whole comment above.

>  		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
>  
>  	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 4dbe79009c0e..5700097475c0 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6155,7 +6155,7 @@ enum {
>  #define   PIPEMISC_DITHER_8_BPC		(0 << 5)
>  #define   PIPEMISC_DITHER_10_BPC	(1 << 5)
>  #define   PIPEMISC_DITHER_6_BPC		(2 << 5)
> -#define   PIPEMISC_DITHER_12_BPC	(3 << 5)
> +#define   PIPEMISC_DITHER_12_BPC	(4 << 5)

We already use the macro. You can't just replace this like this without
an explanation. Why would this not break existing stuff?

>  #define   PIPEMISC_DITHER_ENABLE	(1 << 4)
>  #define   PIPEMISC_DITHER_TYPE_MASK	(3 << 2)
>  #define   PIPEMISC_DITHER_TYPE_SP	(0 << 2)
> @@ -7726,6 +7726,7 @@ enum {
>  #define  GAMMA_MODE_MODE_12BIT	(2 << 0)
>  #define  GAMMA_MODE_MODE_SPLIT	(3 << 0) /* ivb-bdw */
>  #define  GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED	(3 << 0) /* icl + */
> +#define  GAMMA_MODE_DITHER_AFTER_CC1 (1 << 26)

The bits are supposed to be defined in the order from highest to lowest
bit. See the big comment at the beginning of the file.

It's confusing that this is named GAMMA_MODE_ while it's not included in
GAMMA_MODE_MASK (and likely shouldn't be).

>  
>  /* DMC */
>  #define DMC_PROGRAM(i)		_MMIO(0x80000 + (i) * 4)

-- 
Jani Nikula, Intel Open Source Graphics Center
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

[Modem, Bhanuprakash]

> From: Jani Nikula <jani.nikula@linux.intel.com>
> Sent: Wednesday, May 26, 2021 7:34 PM
> To: Modem, Bhanuprakash <bhanuprakash.modem@intel.com>; intel-
> gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>;
> Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman
> <anshuman.gupta@intel.com>
> Subject: Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after
> the CC1
> 
> On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> > From: Nischal Varide <nischal.varide@intel.com>
> >
> > If the panel is 12bpc then Dithering is not enabled in the Legacy
> > dithering block , instead its Enabled after the C1 CC1 pipe post
> > color space conversion.For a 6bpc pannel Dithering is enabled in
> > Legacy block.
> >
> > Signed-off-by: Nischal Varide <nischal.varide@intel.com>
> 
> When you're sending someone else's patches, you need to add your own
> Signed-off-by here.

Patch 2/2 in this series has a dependency on this patch. And I haven't
made any changes in this patch, so not added my Signed-off-by :-)

- Bhanu

> 
> > ---
> >  drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
> >  drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
> >  drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
> >  3 files changed, 23 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_color.c
> b/drivers/gpu/drm/i915/display/intel_color.c
> > index dab892d2251b..4ad5bd849695 100644
> > --- a/drivers/gpu/drm/i915/display/intel_color.c
> > +++ b/drivers/gpu/drm/i915/display/intel_color.c
> > @@ -1605,6 +1605,20 @@ static u32 icl_csc_mode(const struct intel_crtc_state
> *crtc_state)
> >  	return csc_mode;
> >  }
> >
> > +static u32 dither_after_cc1_12bpc(const struct intel_crtc_state
> *crtc_state)
> > +{
> > +	u32 gamma_mode = crtc_state->gamma_mode;
> > +	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
> > +
> > +	if (DISPLAY_VER(i915) >= 13) {
> > +		if (!crtc_state->dither_force_disable &&
> > +		    (crtc_state->pipe_bpp == 36))
> > +			gamma_mode |= GAMMA_MODE_DITHER_AFTER_CC1;
> > +	}
> > +
> > +	return gamma_mode;
> > +}
> > +
> >  static int icl_color_check(struct intel_crtc_state *crtc_state)
> >  {
> >  	int ret;
> > @@ -1615,6 +1629,7 @@ static int icl_color_check(struct intel_crtc_state
> *crtc_state)
> >
> >  	crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
> >
> > +	crtc_state->gamma_mode = dither_after_cc1_12bpc(crtc_state);
> 
> We don't really do the kind of thing where you need a sequence of calls
> where one depends on the other, adding to the same state member. At a
> glance, this just looks wrong, superficially overwriting the previously
> set value. I'd just add the check at the end of icl_gamma_mode().
> 
> >  	crtc_state->csc_mode = icl_csc_mode(crtc_state);
> >
> >  	crtc_state->preload_luts = intel_can_preload_luts(crtc_state);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> > index 0bb2e582c87f..1a658bdaeab6 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -5741,7 +5741,12 @@ static void bdw_set_pipemisc(const struct
> intel_crtc_state *crtc_state)
> >  		break;
> >  	}
> >
> > -	if (crtc_state->dither)
> > +	/*
> > +	 * If 12bpc panel then, Enables dithering after the CC1 pipe
> > +	 * post color space conversion and not here
> > +	 */
> > +
> > +	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
> 
> This now duplicates the pipe_bpp condition in two places, which seems a
> bit fragile. Maybe the check should be on gamma_mode? It would remove
> the need for the whole comment above.
> 
> >  		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
> >
> >  	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> > index 4dbe79009c0e..5700097475c0 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -6155,7 +6155,7 @@ enum {
> >  #define   PIPEMISC_DITHER_8_BPC		(0 << 5)
> >  #define   PIPEMISC_DITHER_10_BPC	(1 << 5)
> >  #define   PIPEMISC_DITHER_6_BPC		(2 << 5)
> > -#define   PIPEMISC_DITHER_12_BPC	(3 << 5)
> > +#define   PIPEMISC_DITHER_12_BPC	(4 << 5)
> 
> We already use the macro. You can't just replace this like this without
> an explanation. Why would this not break existing stuff?
> 
> >  #define   PIPEMISC_DITHER_ENABLE	(1 << 4)
> >  #define   PIPEMISC_DITHER_TYPE_MASK	(3 << 2)
> >  #define   PIPEMISC_DITHER_TYPE_SP	(0 << 2)
> > @@ -7726,6 +7726,7 @@ enum {
> >  #define  GAMMA_MODE_MODE_12BIT	(2 << 0)
> >  #define  GAMMA_MODE_MODE_SPLIT	(3 << 0) /* ivb-bdw */
> >  #define  GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED	(3 << 0) /* icl + */
> > +#define  GAMMA_MODE_DITHER_AFTER_CC1 (1 << 26)
> 
> The bits are supposed to be defined in the order from highest to lowest
> bit. See the big comment at the beginning of the file.
> 
> It's confusing that this is named GAMMA_MODE_ while it's not included in
> GAMMA_MODE_MASK (and likely shouldn't be).
> 
> >
> >  /* DMC */
> >  #define DMC_PROGRAM(i)		_MMIO(0x80000 + (i) * 4)
> 
> --
> Jani Nikula, Intel Open Source Graphics Center
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

[Jani Nikula]

On Wed, 26 May 2021, "Modem, Bhanuprakash" <bhanuprakash.modem@intel.com> wrote:
>> From: Jani Nikula <jani.nikula@linux.intel.com>
>> When you're sending someone else's patches, you need to add your own
>> Signed-off-by here.
>
> Patch 2/2 in this series has a dependency on this patch. And I haven't
> made any changes in this patch, so not added my Signed-off-by :-)

Signed-off-by isn't about changes.

https://developercertificate.org/

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Graphics Center
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

[Varide, Nischal]

-----Original Message-----
From: Modem, Bhanuprakash <bhanuprakash.modem@intel.com> 
Sent: Wednesday, May 26, 2021 9:29 PM
To: Jani Nikula <jani.nikula@linux.intel.com>; intel-gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>; Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman <anshuman.gupta@intel.com>
Subject: RE: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

> From: Jani Nikula <jani.nikula@linux.intel.com>
> Sent: Wednesday, May 26, 2021 7:34 PM
> To: Modem, Bhanuprakash <bhanuprakash.modem@intel.com>; intel- 
> gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>; 
> Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman 
> <anshuman.gupta@intel.com>
> Subject: Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling 
> dithering after the CC1
> 
> On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> > From: Nischal Varide <nischal.varide@intel.com>
> >
> > If the panel is 12bpc then Dithering is not enabled in the Legacy 
> > dithering block , instead its Enabled after the C1 CC1 pipe post 
> > color space conversion.For a 6bpc pannel Dithering is enabled in 
> > Legacy block.
> >
> > Signed-off-by: Nischal Varide <nischal.varide@intel.com>
> 
> When you're sending someone else's patches, you need to add your own 
> Signed-off-by here.

Patch 2/2 in this series has a dependency on this patch. And I haven't made any changes in this patch, so not added my Signed-off-by :-)

- Bhanu

> 
> > ---
> >  drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
> >  drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
> >  drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
> >  3 files changed, 23 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_color.c
> b/drivers/gpu/drm/i915/display/intel_color.c
> > index dab892d2251b..4ad5bd849695 100644
> > --- a/drivers/gpu/drm/i915/display/intel_color.c
> > +++ b/drivers/gpu/drm/i915/display/intel_color.c
> > @@ -1605,6 +1605,20 @@ static u32 icl_csc_mode(const struct 
> > intel_crtc_state
> *crtc_state)
> >  	return csc_mode;
> >  }
> >
> > +static u32 dither_after_cc1_12bpc(const struct intel_crtc_state
> *crtc_state)
> > +{
> > +	u32 gamma_mode = crtc_state->gamma_mode;
> > +	struct drm_i915_private *i915 = 
> > +to_i915(crtc_state->uapi.crtc->dev);
> > +
> > +	if (DISPLAY_VER(i915) >= 13) {
> > +		if (!crtc_state->dither_force_disable &&
> > +		    (crtc_state->pipe_bpp == 36))
> > +			gamma_mode |= GAMMA_MODE_DITHER_AFTER_CC1;
> > +	}
> > +
> > +	return gamma_mode;
> > +}
> > +
> >  static int icl_color_check(struct intel_crtc_state *crtc_state)  {
> >  	int ret;
> > @@ -1615,6 +1629,7 @@ static int icl_color_check(struct 
> > intel_crtc_state
> *crtc_state)
> >
> >  	crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
> >
> > +	crtc_state->gamma_mode = dither_after_cc1_12bpc(crtc_state);
> 
> We don't really do the kind of thing where you need a sequence of 
> calls where one depends on the other, adding to the same state member. 
> At a glance, this just looks wrong, superficially overwriting the 
> previously set value. I'd just add the check at the end of icl_gamma_mode().


Yes ,agree and will do the needful here.


> 
> >  	crtc_state->csc_mode = icl_csc_mode(crtc_state);
> >
> >  	crtc_state->preload_luts = intel_can_preload_luts(crtc_state);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> > index 0bb2e582c87f..1a658bdaeab6 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -5741,7 +5741,12 @@ static void bdw_set_pipemisc(const struct
> intel_crtc_state *crtc_state)
> >  		break;
> >  	}
> >
> > -	if (crtc_state->dither)
> > +	/*
> > +	 * If 12bpc panel then, Enables dithering after the CC1 pipe
> > +	 * post color space conversion and not here
> > +	 */
> > +
> > +	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
> 
> This now duplicates the pipe_bpp condition in two places, which seems 
> a bit fragile. Maybe the check should be on gamma_mode? It would 
> remove the need for the whole comment above.
There are two bits for controlling the dithering one at pipe level and other at gamma level, 
So the checks at two places .
 
> >  		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
> >
> >  	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 || 
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> > index 4dbe79009c0e..5700097475c0 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -6155,7 +6155,7 @@ enum {
> >  #define   PIPEMISC_DITHER_8_BPC		(0 << 5)
> >  #define   PIPEMISC_DITHER_10_BPC	(1 << 5)
> >  #define   PIPEMISC_DITHER_6_BPC		(2 << 5)
> > -#define   PIPEMISC_DITHER_12_BPC	(3 << 5)
> > +#define   PIPEMISC_DITHER_12_BPC	(4 << 5)
> 
> We already use the macro. You can't just replace this like this 
> without an explanation. Why would this not break existing stuff?
> 
> >  #define   PIPEMISC_DITHER_ENABLE	(1 << 4)
> >  #define   PIPEMISC_DITHER_TYPE_MASK	(3 << 2)
> >  #define   PIPEMISC_DITHER_TYPE_SP	(0 << 2)
> > @@ -7726,6 +7726,7 @@ enum {
> >  #define  GAMMA_MODE_MODE_12BIT	(2 << 0)
> >  #define  GAMMA_MODE_MODE_SPLIT	(3 << 0) /* ivb-bdw */
> >  #define  GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED	(3 << 0) /* icl + */
> > +#define  GAMMA_MODE_DITHER_AFTER_CC1 (1 << 26)
> 
> The bits are supposed to be defined in the order from highest to 
> lowest bit. See the big comment at the beginning of the file.
Yes..Noted

> It's confusing that this is named GAMMA_MODE_ while it's not included 
> in GAMMA_MODE_MASK (and likely shouldn't be).

Yes..can change the name to GAMMA_DITHER_AFTER_CC1
> >
> >  /* DMC */
> >  #define DMC_PROGRAM(i)		_MMIO(0x80000 + (i) * 4)
> 
> --
> Jani Nikula, Intel Open Source Graphics Center

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Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

[Varide, Nischal]

-----Original Message-----
From: Modem, Bhanuprakash <bhanuprakash.modem@intel.com>
Sent: Wednesday, May 26, 2021 9:29 PM
To: Jani Nikula <jani.nikula@linux.intel.com>; intel-gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>; Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman <anshuman.gupta@intel.com>
Subject: RE: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling dithering after the CC1

> From: Jani Nikula <jani.nikula@linux.intel.com>
> Sent: Wednesday, May 26, 2021 7:34 PM
> To: Modem, Bhanuprakash <bhanuprakash.modem@intel.com>; intel- 
> gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>; 
> Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman 
> <anshuman.gupta@intel.com>
> Subject: Re: [Intel-gfx] [PATCH 1/2] drm/i915/xelpd: Enabling 
> dithering after the CC1
> 
> On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> > From: Nischal Varide <nischal.varide@intel.com>
> >
> > If the panel is 12bpc then Dithering is not enabled in the Legacy 
> > dithering block , instead its Enabled after the C1 CC1 pipe post 
> > color space conversion.For a 6bpc pannel Dithering is enabled in 
> > Legacy block.
> >
> > Signed-off-by: Nischal Varide <nischal.varide@intel.com>
> 
> When you're sending someone else's patches, you need to add your own 
> Signed-off-by here.

Patch 2/2 in this series has a dependency on this patch. And I haven't made any changes in this patch, so not added my Signed-off-by :-)

- Bhanu

> 
> > ---
> >  drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
> >  drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
> >  drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
> >  3 files changed, 23 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_color.c
> b/drivers/gpu/drm/i915/display/intel_color.c
> > index dab892d2251b..4ad5bd849695 100644
> > --- a/drivers/gpu/drm/i915/display/intel_color.c
> > +++ b/drivers/gpu/drm/i915/display/intel_color.c
> > @@ -1605,6 +1605,20 @@ static u32 icl_csc_mode(const struct 
> > intel_crtc_state
> *crtc_state)
> >  	return csc_mode;
> >  }
> >
> > +static u32 dither_after_cc1_12bpc(const struct intel_crtc_state
> *crtc_state)
> > +{
> > +	u32 gamma_mode = crtc_state->gamma_mode;
> > +	struct drm_i915_private *i915 =
> > +to_i915(crtc_state->uapi.crtc->dev);
> > +
> > +	if (DISPLAY_VER(i915) >= 13) {
> > +		if (!crtc_state->dither_force_disable &&
> > +		    (crtc_state->pipe_bpp == 36))
> > +			gamma_mode |= GAMMA_MODE_DITHER_AFTER_CC1;
> > +	}
> > +
> > +	return gamma_mode;
> > +}
> > +
> >  static int icl_color_check(struct intel_crtc_state *crtc_state)  {
> >  	int ret;
> > @@ -1615,6 +1629,7 @@ static int icl_color_check(struct 
> > intel_crtc_state
> *crtc_state)
> >
> >  	crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
> >
> > +	crtc_state->gamma_mode = dither_after_cc1_12bpc(crtc_state);
> 
> We don't really do the kind of thing where you need a sequence of 
> calls where one depends on the other, adding to the same state member.
> At a glance, this just looks wrong, superficially overwriting the 
> previously set value. I'd just add the check at the end of icl_gamma_mode().


Yes ,agree and will do the needful here.


> 
> >  	crtc_state->csc_mode = icl_csc_mode(crtc_state);
> >
> >  	crtc_state->preload_luts = intel_can_preload_luts(crtc_state);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> > index 0bb2e582c87f..1a658bdaeab6 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -5741,7 +5741,12 @@ static void bdw_set_pipemisc(const struct
> intel_crtc_state *crtc_state)
> >  		break;
> >  	}
> >
> > -	if (crtc_state->dither)
> > +	/*
> > +	 * If 12bpc panel then, Enables dithering after the CC1 pipe
> > +	 * post color space conversion and not here
> > +	 */
> > +
> > +	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
> 
> This now duplicates the pipe_bpp condition in two places, which seems 
> a bit fragile. Maybe the check should be on gamma_mode? It would 
> remove the need for the whole comment above.
There are two bits for controlling the dithering one at pipe level and other at gamma level, 
So the checks at two places .
 
> >  		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
> >
> >  	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 || 
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> > index 4dbe79009c0e..5700097475c0 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -6155,7 +6155,7 @@ enum {
> >  #define   PIPEMISC_DITHER_8_BPC		(0 << 5)
> >  #define   PIPEMISC_DITHER_10_BPC	(1 << 5)
> >  #define   PIPEMISC_DITHER_6_BPC		(2 << 5)
> > -#define   PIPEMISC_DITHER_12_BPC	(3 << 5)
> > +#define   PIPEMISC_DITHER_12_BPC	(4 << 5)
> 
> We already use the macro. You can't just replace this like this 
> without an explanation. Why would this not break existing stuff?
 This is by referring a wrong register in bspec, not needed and removing it
> >  #define   PIPEMISC_DITHER_ENABLE	(1 << 4)
> >  #define   PIPEMISC_DITHER_TYPE_MASK	(3 << 2)
> >  #define   PIPEMISC_DITHER_TYPE_SP	(0 << 2)
> > @@ -7726,6 +7726,7 @@ enum {
> >  #define  GAMMA_MODE_MODE_12BIT	(2 << 0)
> >  #define  GAMMA_MODE_MODE_SPLIT	(3 << 0) /* ivb-bdw */
> >  #define  GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED	(3 << 0) /* icl + */
> > +#define  GAMMA_MODE_DITHER_AFTER_CC1 (1 << 26)
> 
> The bits are supposed to be defined in the order from highest to 
> lowest bit. See the big comment at the beginning of the file.
Yes..Noted

> It's confusing that this is named GAMMA_MODE_ while it's not included 
> in GAMMA_MODE_MASK (and likely shouldn't be).

Yes..can change the name to GAMMA_DITHER_AFTER_CC1
>
> >  /* DMC */
> >  #define DMC_PROGRAM(i)		_MMIO(0x80000 + (i) * 4)
> 
> --
> Jani Nikula, Intel Open Source Graphics Center

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[Intel-gfx] [PATCH v2 0/1] Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

This is Version 2 of the patch, after addresing few review comments.

Nischal Varide (1):
  drm/i915/xelpd: Enabling dithering after the CC1

 drivers/gpu/drm/i915/display/intel_color.c   | 7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 7 ++++++-
 drivers/gpu/drm/i915/i915_reg.h              | 1 +
 3 files changed, 14 insertions(+), 1 deletion(-)

-- 
2.29.2

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[Intel-gfx] [PATCH v2 1/1] drm/i915/xelpd: Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Signed-off-by: Nischal Varide <nischal.varide@intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c   | 7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 7 ++++++-
 drivers/gpu/drm/i915/i915_reg.h              | 1 +
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index dab892d2251b..e11b3dbf0b95 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1574,6 +1574,7 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
 static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 {
 	u32 gamma_mode = 0;
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 
 	if (crtc_state->hw.degamma_lut)
 		gamma_mode |= PRE_CSC_GAMMA_ENABLE;
@@ -1588,6 +1589,12 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 	else
 		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
 
+	if (DISPLAY_VER(i915) >= 13) {
+		if (!crtc_state->dither_force_disable &&
+				(crtc_state->pipe_bpp == 36))
+			gamma_mode |= POST_CC1_GAMMA_ENABLE;
+	}
+
 	return gamma_mode;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index caf0414e0b50..fd3186a5e6ff 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5762,7 +5762,12 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
 		break;
 	}
 
-	if (crtc_state->dither)
+	/*
+	 * If 12bpc panel then, Enables dithering after the CC1 pipe
+	 * post color space conversion and not here
+	 */
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
 		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
 
 	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 24307c49085f..fa800a77ea49 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7743,6 +7743,7 @@ enum {
 #define GAMMA_MODE(pipe) _MMIO_PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
 #define  PRE_CSC_GAMMA_ENABLE	(1 << 31)
 #define  POST_CSC_GAMMA_ENABLE	(1 << 30)
+#define  POST_CC1_GAMMA_ENABLE  (1 << 26)
 #define  GAMMA_MODE_MODE_MASK	(3 << 0)
 #define  GAMMA_MODE_MODE_8BIT	(0 << 0)
 #define  GAMMA_MODE_MODE_10BIT	(1 << 0)
-- 
2.29.2

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Re: [Intel-gfx] [PATCH v2 1/1] drm/i915/xelpd: Enabling dithering after the CC1

[Modem, Bhanuprakash]

> From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of Nischal
> Varide
> Sent: Wednesday, June 2, 2021 11:48 AM
> To: intel-gfx@lists.freedesktop.org; Varide, Nischal
> <nischal.varide@intel.com>; Shankar, Uma <uma.shankar@intel.com>; Gupta,
> Anshuman <anshuman.gupta@intel.com>; Nikula, Jani <jani.nikula@intel.com>
> Subject: [Intel-gfx] [PATCH v2 1/1] drm/i915/xelpd: Enabling dithering after
> the CC1
> 
> If the panel is 12bpc then Dithering is not enabled in the Legacy
> dithering block , instead its Enabled after the C1 CC1 pipe post
> color space conversion.For a 6bpc pannel Dithering is enabled in
> Legacy block.
> 
> Signed-off-by: Nischal Varide <nischal.varide@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_color.c   | 7 +++++++
>  drivers/gpu/drm/i915/display/intel_display.c | 7 ++++++-
>  drivers/gpu/drm/i915/i915_reg.h              | 1 +
>  3 files changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c
> b/drivers/gpu/drm/i915/display/intel_color.c
> index dab892d2251b..e11b3dbf0b95 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -1574,6 +1574,7 @@ static int glk_color_check(struct intel_crtc_state
> *crtc_state)
>  static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
>  {
>  	u32 gamma_mode = 0;
> +	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
> 
>  	if (crtc_state->hw.degamma_lut)
>  		gamma_mode |= PRE_CSC_GAMMA_ENABLE;
> @@ -1588,6 +1589,12 @@ static u32 icl_gamma_mode(const struct intel_crtc_state
> *crtc_state)
>  	else
>  		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
> 
> +	if (DISPLAY_VER(i915) >= 13) {
> +		if (!crtc_state->dither_force_disable &&
> +				(crtc_state->pipe_bpp == 36))
> +			gamma_mode |= POST_CC1_GAMMA_ENABLE;
> +	}
> +
>  	return gamma_mode;
>  }
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index caf0414e0b50..fd3186a5e6ff 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -5762,7 +5762,12 @@ static void bdw_set_pipemisc(const struct
> intel_crtc_state *crtc_state)
>  		break;
>  	}
> 
> -	if (crtc_state->dither)
> +	/*
> +	 * If 12bpc panel then, Enables dithering after the CC1 pipe
> +	 * post color space conversion and not here
> +	 */
> +
> +	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))

Consider we have a config as 12bpc panel + DISPLAY_VER < 13

This check prevents the dither at end of the pipe and apparently icl_gamma_mode()
will not enable the dither after CC1.

So, we'll end up not enable the Dither at all.

>  		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
> 
>  	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 24307c49085f..fa800a77ea49 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7743,6 +7743,7 @@ enum {
>  #define GAMMA_MODE(pipe) _MMIO_PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
>  #define  PRE_CSC_GAMMA_ENABLE	(1 << 31)
>  #define  POST_CSC_GAMMA_ENABLE	(1 << 30)
> +#define  POST_CC1_GAMMA_ENABLE  (1 << 26)
>  #define  GAMMA_MODE_MODE_MASK	(3 << 0)
>  #define  GAMMA_MODE_MODE_8BIT	(0 << 0)
>  #define  GAMMA_MODE_MODE_10BIT	(1 << 0)
> --
> 2.29.2
> 
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[Intel-gfx] [PATCH v3 0/1] Enabling dithering after the CC1

[Nischal Varide]

v3 : Addressed Review Comments by (Bhanu)

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

If the panel is 12bpc and display_ver < 13 then we can not enable
dithering at all.So this v3 version of the patch has added an extra 
check to fix it.

Nischal Varide (1):
  drm/i915/xelpd: Enabling dithering after the CC1

 drivers/gpu/drm/i915/display/intel_color.c   |  7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 11 ++++++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  1 +
 3 files changed, 18 insertions(+), 1 deletion(-)

-- 
2.29.2

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[Intel-gfx] [PATCH v3 1/1] drm/i915/xelpd: Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Signed-off-by: Nischal Varide <nischal.varide@intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c   |  7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 11 ++++++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  1 +
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index dab892d2251b..e11b3dbf0b95 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1574,6 +1574,7 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
 static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 {
 	u32 gamma_mode = 0;
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 
 	if (crtc_state->hw.degamma_lut)
 		gamma_mode |= PRE_CSC_GAMMA_ENABLE;
@@ -1588,6 +1589,12 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 	else
 		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
 
+	if (DISPLAY_VER(i915) >= 13) {
+		if (!crtc_state->dither_force_disable &&
+				(crtc_state->pipe_bpp == 36))
+			gamma_mode |= POST_CC1_GAMMA_ENABLE;
+	}
+
 	return gamma_mode;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index caf0414e0b50..5345779cfce2 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5762,7 +5762,16 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
 		break;
 	}
 
-	if (crtc_state->dither)
+	/*
+	 * If 12bpc panel then, Enables dithering after the CC1 pipe
+	 * post color space conversion and not here for display_ver
+	 * greater than or equal to thirteen.
+	 */
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
+		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp == 36) && (DISPLAY_VER(dev_priv) < 13))
 		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
 
 	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 24307c49085f..fa800a77ea49 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7743,6 +7743,7 @@ enum {
 #define GAMMA_MODE(pipe) _MMIO_PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
 #define  PRE_CSC_GAMMA_ENABLE	(1 << 31)
 #define  POST_CSC_GAMMA_ENABLE	(1 << 30)
+#define  POST_CC1_GAMMA_ENABLE  (1 << 26)
 #define  GAMMA_MODE_MODE_MASK	(3 << 0)
 #define  GAMMA_MODE_MODE_8BIT	(0 << 0)
 #define  GAMMA_MODE_MODE_10BIT	(1 << 0)
-- 
2.29.2

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[Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither status via debugfs

[Bhanuprakash Modem]

It's useful to know the dithering state & pipe bpc for IGT testing.
This patch will expose the dithering state for the crtc via a debugfs
file "dither".

Example usage: cat /sys/kernel/debug/dri/0/crtc-0/dither

Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Nischal Varide <nischal.varide@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
---
 .../drm/i915/display/intel_display_debugfs.c  | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 94e5cbd86e77..a6fefc7d5ab9 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -2158,11 +2158,43 @@ static const struct {
 	{"i915_edp_psr_debug", &i915_edp_psr_debug_fops},
 };
 
+static int dither_state_show(struct seq_file *m, void *data)
+{
+	struct intel_crtc *crtc = to_intel_crtc(m->private);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_crtc_state *crtc_state;
+	int ret;
+
+	if (!HAS_DISPLAY(dev_priv))
+		return -ENODEV;
+
+	ret = drm_modeset_lock_single_interruptible(&crtc->base.mutex);
+	if (ret)
+		return ret;
+
+	crtc_state = to_intel_crtc_state(crtc->base.state);
+	seq_printf(m, "bpc: %u\n", crtc_state->pipe_bpp / 3);
+	seq_printf(m, "Dither: %u\n", (crtc_state->dither) ? 1 : 0);
+	seq_printf(m, "Dither_CC1: %u\n",
+		(crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);
+
+	drm_modeset_unlock(&crtc->base.mutex);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(dither_state);
+
 void intel_display_debugfs_register(struct drm_i915_private *i915)
 {
 	struct drm_minor *minor = i915->drm.primary;
+	struct drm_device *dev = &i915->drm;
+	struct drm_crtc *crtc;
 	int i;
 
+	drm_for_each_crtc(crtc, dev)
+		debugfs_create_file("dither", 0444, crtc->debugfs_entry, crtc,
+				    &dither_state_fops);
+
 	for (i = 0; i < ARRAY_SIZE(intel_display_debugfs_files); i++) {
 		debugfs_create_file(intel_display_debugfs_files[i].name,
 				    S_IRUGO | S_IWUSR,
-- 
2.20.1

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Re: [Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither status via debugfs

[Jani Nikula]

On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> It's useful to know the dithering state & pipe bpc for IGT testing.
> This patch will expose the dithering state for the crtc via a debugfs
> file "dither".
>
> Example usage: cat /sys/kernel/debug/dri/0/crtc-0/dither
>
> Cc: Uma Shankar <uma.shankar@intel.com>
> Cc: Nischal Varide <nischal.varide@intel.com>
> Cc: Matt Roper <matthew.d.roper@intel.com>
> Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> ---
>  .../drm/i915/display/intel_display_debugfs.c  | 32 +++++++++++++++++++
>  1 file changed, 32 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index 94e5cbd86e77..a6fefc7d5ab9 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -2158,11 +2158,43 @@ static const struct {
>  	{"i915_edp_psr_debug", &i915_edp_psr_debug_fops},
>  };
>  
> +static int dither_state_show(struct seq_file *m, void *data)
> +{
> +	struct intel_crtc *crtc = to_intel_crtc(m->private);
> +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> +	struct intel_crtc_state *crtc_state;
> +	int ret;
> +
> +	if (!HAS_DISPLAY(dev_priv))
> +		return -ENODEV;

Unneeded.

> +
> +	ret = drm_modeset_lock_single_interruptible(&crtc->base.mutex);
> +	if (ret)
> +		return ret;
> +
> +	crtc_state = to_intel_crtc_state(crtc->base.state);
> +	seq_printf(m, "bpc: %u\n", crtc_state->pipe_bpp / 3);
> +	seq_printf(m, "Dither: %u\n", (crtc_state->dither) ? 1 : 0);
> +	seq_printf(m, "Dither_CC1: %u\n",
> +		(crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);

Are you looking to duplicate the conditions for enabling this CC1 mode
in IGT, and then checking if the driver set the bit as well?

I thought the direction has been that we don't do this type of
validation in IGT. There is no end to it.

Ville?

> +
> +	drm_modeset_unlock(&crtc->base.mutex);
> +
> +	return 0;
> +}
> +DEFINE_SHOW_ATTRIBUTE(dither_state);
> +
>  void intel_display_debugfs_register(struct drm_i915_private *i915)
>  {
>  	struct drm_minor *minor = i915->drm.primary;
> +	struct drm_device *dev = &i915->drm;
> +	struct drm_crtc *crtc;
>  	int i;
>  
> +	drm_for_each_crtc(crtc, dev)
> +		debugfs_create_file("dither", 0444, crtc->debugfs_entry, crtc,
> +				    &dither_state_fops);
> +

See intel_crtc_debugfs_add(), called from intel_crtc_late_register().

>  	for (i = 0; i < ARRAY_SIZE(intel_display_debugfs_files); i++) {
>  		debugfs_create_file(intel_display_debugfs_files[i].name,
>  				    S_IRUGO | S_IWUSR,

-- 
Jani Nikula, Intel Open Source Graphics Center
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Re: [Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither status via debugfs

[Ville Syrjälä]

On Wed, May 26, 2021 at 05:26:56PM +0300, Jani Nikula wrote:
> On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> > It's useful to know the dithering state & pipe bpc for IGT testing.
> > This patch will expose the dithering state for the crtc via a debugfs
> > file "dither".
> >
> > Example usage: cat /sys/kernel/debug/dri/0/crtc-0/dither
> >
> > Cc: Uma Shankar <uma.shankar@intel.com>
> > Cc: Nischal Varide <nischal.varide@intel.com>
> > Cc: Matt Roper <matthew.d.roper@intel.com>
> > Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> > ---
> >  .../drm/i915/display/intel_display_debugfs.c  | 32 +++++++++++++++++++
> >  1 file changed, 32 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > index 94e5cbd86e77..a6fefc7d5ab9 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > @@ -2158,11 +2158,43 @@ static const struct {
> >  	{"i915_edp_psr_debug", &i915_edp_psr_debug_fops},
> >  };
> >  
> > +static int dither_state_show(struct seq_file *m, void *data)
> > +{
> > +	struct intel_crtc *crtc = to_intel_crtc(m->private);
> > +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > +	struct intel_crtc_state *crtc_state;
> > +	int ret;
> > +
> > +	if (!HAS_DISPLAY(dev_priv))
> > +		return -ENODEV;
> 
> Unneeded.
> 
> > +
> > +	ret = drm_modeset_lock_single_interruptible(&crtc->base.mutex);
> > +	if (ret)
> > +		return ret;
> > +
> > +	crtc_state = to_intel_crtc_state(crtc->base.state);
> > +	seq_printf(m, "bpc: %u\n", crtc_state->pipe_bpp / 3);
> > +	seq_printf(m, "Dither: %u\n", (crtc_state->dither) ? 1 : 0);
> > +	seq_printf(m, "Dither_CC1: %u\n",
> > +		(crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);
> 
> Are you looking to duplicate the conditions for enabling this CC1 mode
> in IGT, and then checking if the driver set the bit as well?
> 
> I thought the direction has been that we don't do this type of
> validation in IGT. There is no end to it.
> 
> Ville?

Yeah, I hate all the ad-hoc debugfs files. They just get in the
way of refactoring all the time.

For state dumps we should just fix the midlayer crap in the atomic
state dump framework and start using it.

> 
> > +
> > +	drm_modeset_unlock(&crtc->base.mutex);
> > +
> > +	return 0;
> > +}
> > +DEFINE_SHOW_ATTRIBUTE(dither_state);
> > +
> >  void intel_display_debugfs_register(struct drm_i915_private *i915)
> >  {
> >  	struct drm_minor *minor = i915->drm.primary;
> > +	struct drm_device *dev = &i915->drm;
> > +	struct drm_crtc *crtc;
> >  	int i;
> >  
> > +	drm_for_each_crtc(crtc, dev)
> > +		debugfs_create_file("dither", 0444, crtc->debugfs_entry, crtc,
> > +				    &dither_state_fops);
> > +
> 
> See intel_crtc_debugfs_add(), called from intel_crtc_late_register().
> 
> >  	for (i = 0; i < ARRAY_SIZE(intel_display_debugfs_files); i++) {
> >  		debugfs_create_file(intel_display_debugfs_files[i].name,
> >  				    S_IRUGO | S_IWUSR,
> 
> -- 
> Jani Nikula, Intel Open Source Graphics Center

-- 
Ville Syrjälä
Intel
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Re: [Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither status via debugfs

[Modem, Bhanuprakash]

> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Sent: Wednesday, May 26, 2021 8:08 PM
> To: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Modem, Bhanuprakash <bhanuprakash.modem@intel.com>; intel-
> gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>;
> Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman
> <anshuman.gupta@intel.com>
> Subject: Re: [Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither
> status via debugfs
> 
> On Wed, May 26, 2021 at 05:26:56PM +0300, Jani Nikula wrote:
> > On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> wrote:
> > > It's useful to know the dithering state & pipe bpc for IGT testing.
> > > This patch will expose the dithering state for the crtc via a debugfs
> > > file "dither".
> > >
> > > Example usage: cat /sys/kernel/debug/dri/0/crtc-0/dither
> > >
> > > Cc: Uma Shankar <uma.shankar@intel.com>
> > > Cc: Nischal Varide <nischal.varide@intel.com>
> > > Cc: Matt Roper <matthew.d.roper@intel.com>
> > > Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> > > ---
> > >  .../drm/i915/display/intel_display_debugfs.c  | 32 +++++++++++++++++++
> > >  1 file changed, 32 insertions(+)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > index 94e5cbd86e77..a6fefc7d5ab9 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > @@ -2158,11 +2158,43 @@ static const struct {
> > >  	{"i915_edp_psr_debug", &i915_edp_psr_debug_fops},
> > >  };
> > >
> > > +static int dither_state_show(struct seq_file *m, void *data)
> > > +{
> > > +	struct intel_crtc *crtc = to_intel_crtc(m->private);
> > > +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > > +	struct intel_crtc_state *crtc_state;
> > > +	int ret;
> > > +
> > > +	if (!HAS_DISPLAY(dev_priv))
> > > +		return -ENODEV;
> >
> > Unneeded.
> >
> > > +
> > > +	ret = drm_modeset_lock_single_interruptible(&crtc->base.mutex);
> > > +	if (ret)
> > > +		return ret;
> > > +
> > > +	crtc_state = to_intel_crtc_state(crtc->base.state);
> > > +	seq_printf(m, "bpc: %u\n", crtc_state->pipe_bpp / 3);
> > > +	seq_printf(m, "Dither: %u\n", (crtc_state->dither) ? 1 : 0);
> > > +	seq_printf(m, "Dither_CC1: %u\n",
> > > +		(crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);
> >
> > Are you looking to duplicate the conditions for enabling this CC1 mode
> > in IGT, and then checking if the driver set the bit as well?
> >
> > I thought the direction has been that we don't do this type of
> > validation in IGT. There is no end to it.
> >
> > Ville?
> 
> Yeah, I hate all the ad-hoc debugfs files. They just get in the
> way of refactoring all the time.
> 
> For state dumps we should just fix the midlayer crap in the atomic
> state dump framework and start using it.

AFAIK, user needs to trust the driver and atomic state checker will
make sure the computed s/w state data is properly written to the h/w,
and if there is a mismatch Kernel will throw the WARN.

What if the s/w state computation itself is wrong?

Example:
For 12-bpc panels, dither should be enabled after CC1 and disabled at
end of pipe. Suppose, we have a bug in the driver and dither at end of
pipe is enabled, still atomic state checkers are success.

I can see below options are useful:
1) We can add specific conditional checks in atomic state checkers for
different scenarios, so that kernel will throw WARN.

2) As "dither_legacy", "pipe bpp" are already exposed to "i915_display_info"
we can add "diter_cc1" to the same node instead of creating new nodes [*].
Then we can have robust checks in IGT.

Ville, Jani please suggest to proceed further.

[*]: https://patchwork.freedesktop.org/patch/439720

- Bhanu

> 
> >
> > > +
> > > +	drm_modeset_unlock(&crtc->base.mutex);
> > > +
> > > +	return 0;
> > > +}
> > > +DEFINE_SHOW_ATTRIBUTE(dither_state);
> > > +
> > >  void intel_display_debugfs_register(struct drm_i915_private *i915)
> > >  {
> > >  	struct drm_minor *minor = i915->drm.primary;
> > > +	struct drm_device *dev = &i915->drm;
> > > +	struct drm_crtc *crtc;
> > >  	int i;
> > >
> > > +	drm_for_each_crtc(crtc, dev)
> > > +		debugfs_create_file("dither", 0444, crtc->debugfs_entry, crtc,
> > > +				    &dither_state_fops);
> > > +
> >
> > See intel_crtc_debugfs_add(), called from intel_crtc_late_register().
> >
> > >  	for (i = 0; i < ARRAY_SIZE(intel_display_debugfs_files); i++) {
> > >  		debugfs_create_file(intel_display_debugfs_files[i].name,
> > >  				    S_IRUGO | S_IWUSR,
> >
> > --
> > Jani Nikula, Intel Open Source Graphics Center
> 
> --
> Ville Syrjälä
> Intel
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Re: [Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither status via debugfs

[Modem, Bhanuprakash]

> From: Jani Nikula <jani.nikula@linux.intel.com>
> Sent: Wednesday, May 26, 2021 7:57 PM
> To: Modem, Bhanuprakash <bhanuprakash.modem@intel.com>; intel-
> gfx@lists.freedesktop.org; Varide, Nischal <nischal.varide@intel.com>;
> Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman
> <anshuman.gupta@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Subject: Re: [Intel-gfx] [PATCH 2/2] drm/i915/display/debug: Expose Dither
> status via debugfs
> 
> On Wed, 26 May 2021, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> > It's useful to know the dithering state & pipe bpc for IGT testing.
> > This patch will expose the dithering state for the crtc via a debugfs
> > file "dither".
> >
> > Example usage: cat /sys/kernel/debug/dri/0/crtc-0/dither
> >
> > Cc: Uma Shankar <uma.shankar@intel.com>
> > Cc: Nischal Varide <nischal.varide@intel.com>
> > Cc: Matt Roper <matthew.d.roper@intel.com>
> > Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> > ---
> >  .../drm/i915/display/intel_display_debugfs.c  | 32 +++++++++++++++++++
> >  1 file changed, 32 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > index 94e5cbd86e77..a6fefc7d5ab9 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > @@ -2158,11 +2158,43 @@ static const struct {
> >  	{"i915_edp_psr_debug", &i915_edp_psr_debug_fops},
> >  };
> >
> > +static int dither_state_show(struct seq_file *m, void *data)
> > +{
> > +	struct intel_crtc *crtc = to_intel_crtc(m->private);
> > +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > +	struct intel_crtc_state *crtc_state;
> > +	int ret;
> > +
> > +	if (!HAS_DISPLAY(dev_priv))
> > +		return -ENODEV;
> 
> Unneeded.
> 
> > +
> > +	ret = drm_modeset_lock_single_interruptible(&crtc->base.mutex);
> > +	if (ret)
> > +		return ret;
> > +
> > +	crtc_state = to_intel_crtc_state(crtc->base.state);
> > +	seq_printf(m, "bpc: %u\n", crtc_state->pipe_bpp / 3);
> > +	seq_printf(m, "Dither: %u\n", (crtc_state->dither) ? 1 : 0);
> > +	seq_printf(m, "Dither_CC1: %u\n",
> > +		(crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);
> 
> Are you looking to duplicate the conditions for enabling this CC1 mode
> in IGT, and then checking if the driver set the bit as well?

From IGT we just request a flip/modeset by setting "max bpc" prop with
different values & check for the dithering status. I found debugfs is the
best way to get this dither status info, since we don't have any KMS prop
to expose this info. Otherwise, we need to read the registers and bitmask
to get the dither status which is hectic. 

- Bhanu

> 
> I thought the direction has been that we don't do this type of
> validation in IGT. There is no end to it.
> 
> Ville?
> 
> > +
> > +	drm_modeset_unlock(&crtc->base.mutex);
> > +
> > +	return 0;
> > +}
> > +DEFINE_SHOW_ATTRIBUTE(dither_state);
> > +
> >  void intel_display_debugfs_register(struct drm_i915_private *i915)
> >  {
> >  	struct drm_minor *minor = i915->drm.primary;
> > +	struct drm_device *dev = &i915->drm;
> > +	struct drm_crtc *crtc;
> >  	int i;
> >
> > +	drm_for_each_crtc(crtc, dev)
> > +		debugfs_create_file("dither", 0444, crtc->debugfs_entry, crtc,
> > +				    &dither_state_fops);
> > +
> 
> See intel_crtc_debugfs_add(), called from intel_crtc_late_register().
> 
> >  	for (i = 0; i < ARRAY_SIZE(intel_display_debugfs_files); i++) {
> >  		debugfs_create_file(intel_display_debugfs_files[i].name,
> >  				    S_IRUGO | S_IWUSR,
> 
> --
> Jani Nikula, Intel Open Source Graphics Center
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[Intel-gfx] ✗ Fi.CI.IGT: failure for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

[-- Attachment #1.1: Type: text/plain, Size: 30271 bytes --]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/90594/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_10133_full -> Patchwork_20202_full
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_20202_full absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_20202_full, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_20202_full:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_mmap_offset@clear:
    - shard-iclb:         [PASS][1] -> [INCOMPLETE][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb5/igt@gem_mmap_offset@clear.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb6/igt@gem_mmap_offset@clear.html

  

### Piglit changes ###

#### Possible regressions ####

  * spec@arb_shader_image_size@builtin (NEW):
    - pig-skl-6260u:      NOTRUN -> [INCOMPLETE][3] +2 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/pig-skl-6260u/spec@arb_shader_image_size@builtin.html

  
New tests
---------

  New tests have been introduced between CI_DRM_10133_full and Patchwork_20202_full:

### New Piglit tests (3) ###

  * spec@arb_shader_image_size@builtin:
    - Statuses : 1 incomplete(s)
    - Exec time: [0.0] s

  * spec@arb_shader_texture_image_samples@builtin-image:
    - Statuses : 1 incomplete(s)
    - Exec time: [0.0] s

  * spec@arb_texture_stencil8@draw:
    - Statuses : 1 incomplete(s)
    - Exec time: [0.0] s

  

Known issues
------------

  Here are the changes found in Patchwork_20202_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_create@create-massive:
    - shard-snb:          NOTRUN -> [DMESG-WARN][4] ([i915#3002])
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb2/igt@gem_create@create-massive.html
    - shard-apl:          NOTRUN -> [DMESG-WARN][5] ([i915#3002])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl7/igt@gem_create@create-massive.html

  * igt@gem_ctx_persistence@legacy-engines-queued:
    - shard-snb:          NOTRUN -> [SKIP][6] ([fdo#109271] / [i915#1099]) +2 similar issues
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb6/igt@gem_ctx_persistence@legacy-engines-queued.html

  * igt@gem_exec_fair@basic-deadline:
    - shard-apl:          NOTRUN -> [FAIL][7] ([i915#2846])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl8/igt@gem_exec_fair@basic-deadline.html

  * igt@gem_exec_fair@basic-none-rrul@rcs0:
    - shard-glk:          [PASS][8] -> [FAIL][9] ([i915#2842])
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-glk7/igt@gem_exec_fair@basic-none-rrul@rcs0.html
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-glk4/igt@gem_exec_fair@basic-none-rrul@rcs0.html

  * igt@gem_exec_fair@basic-pace@vecs0:
    - shard-kbl:          [PASS][10] -> [FAIL][11] ([i915#2842])
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@gem_exec_fair@basic-pace@vecs0.html
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl4/igt@gem_exec_fair@basic-pace@vecs0.html

  * igt@gem_exec_reloc@basic-wide-active@vcs1:
    - shard-iclb:         NOTRUN -> [FAIL][12] ([i915#2389])
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb1/igt@gem_exec_reloc@basic-wide-active@vcs1.html

  * igt@gem_huc_copy@huc-copy:
    - shard-apl:          NOTRUN -> [SKIP][13] ([fdo#109271] / [i915#2190])
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl7/igt@gem_huc_copy@huc-copy.html

  * igt@gem_mmap_gtt@cpuset-basic-small-copy:
    - shard-tglb:         [PASS][14] -> [INCOMPLETE][15] ([i915#3468])
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-tglb6/igt@gem_mmap_gtt@cpuset-basic-small-copy.html
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb6/igt@gem_mmap_gtt@cpuset-basic-small-copy.html

  * igt@gem_mmap_gtt@cpuset-basic-small-copy-odd:
    - shard-iclb:         [PASS][16] -> [INCOMPLETE][17] ([i915#2910] / [i915#3468])
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb5/igt@gem_mmap_gtt@cpuset-basic-small-copy-odd.html
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb1/igt@gem_mmap_gtt@cpuset-basic-small-copy-odd.html
    - shard-skl:          NOTRUN -> [INCOMPLETE][18] ([i915#198] / [i915#2910] / [i915#3468])
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl3/igt@gem_mmap_gtt@cpuset-basic-small-copy-odd.html

  * igt@gem_mmap_gtt@cpuset-basic-small-copy-xy:
    - shard-kbl:          [PASS][19] -> [INCOMPLETE][20] ([i915#3468])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@gem_mmap_gtt@cpuset-basic-small-copy-xy.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl4/igt@gem_mmap_gtt@cpuset-basic-small-copy-xy.html
    - shard-iclb:         [PASS][21] -> [INCOMPLETE][22] ([i915#3468])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb2/igt@gem_mmap_gtt@cpuset-basic-small-copy-xy.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb4/igt@gem_mmap_gtt@cpuset-basic-small-copy-xy.html

  * igt@gem_mmap_gtt@cpuset-medium-copy-xy:
    - shard-glk:          [PASS][23] -> [INCOMPLETE][24] ([i915#3468])
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-glk2/igt@gem_mmap_gtt@cpuset-medium-copy-xy.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-glk4/igt@gem_mmap_gtt@cpuset-medium-copy-xy.html

  * igt@gem_mmap_gtt@fault-concurrent:
    - shard-snb:          NOTRUN -> [INCOMPLETE][25] ([i915#3468])
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb2/igt@gem_mmap_gtt@fault-concurrent.html
    - shard-kbl:          NOTRUN -> [INCOMPLETE][26] ([i915#3468])
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@gem_mmap_gtt@fault-concurrent.html

  * igt@gem_mmap_gtt@fault-concurrent-x:
    - shard-snb:          NOTRUN -> [INCOMPLETE][27] ([i915#3468] / [i915#3485])
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb2/igt@gem_mmap_gtt@fault-concurrent-x.html

  * igt@gem_mmap_gtt@fault-concurrent-y:
    - shard-skl:          NOTRUN -> [INCOMPLETE][28] ([i915#3468])
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl7/igt@gem_mmap_gtt@fault-concurrent-y.html

  * igt@gem_render_copy@x-tiled-to-vebox-yf-tiled:
    - shard-iclb:         NOTRUN -> [SKIP][29] ([i915#768])
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb4/igt@gem_render_copy@x-tiled-to-vebox-yf-tiled.html

  * igt@gem_userptr_blits@vma-merge:
    - shard-snb:          NOTRUN -> [FAIL][30] ([i915#2724])
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb6/igt@gem_userptr_blits@vma-merge.html

  * igt@i915_module_load@reload-with-fault-injection:
    - shard-skl:          [PASS][31] -> [DMESG-WARN][32] ([i915#1982]) +2 similar issues
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl8/igt@i915_module_load@reload-with-fault-injection.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl7/igt@i915_module_load@reload-with-fault-injection.html

  * igt@i915_pm_lpsp@kms-lpsp@kms-lpsp-dp:
    - shard-apl:          NOTRUN -> [SKIP][33] ([fdo#109271] / [i915#1937])
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl2/igt@i915_pm_lpsp@kms-lpsp@kms-lpsp-dp.html

  * igt@i915_selftest@live@execlists:
    - shard-apl:          NOTRUN -> [DMESG-FAIL][34] ([i915#3462])
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl3/igt@i915_selftest@live@execlists.html

  * igt@i915_suspend@forcewake:
    - shard-skl:          [PASS][35] -> [INCOMPLETE][36] ([i915#146] / [i915#636])
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl1/igt@i915_suspend@forcewake.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl3/igt@i915_suspend@forcewake.html

  * igt@kms_chamelium@hdmi-hpd-with-enabled-mode:
    - shard-tglb:         NOTRUN -> [SKIP][37] ([fdo#109284] / [fdo#111827])
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@kms_chamelium@hdmi-hpd-with-enabled-mode.html

  * igt@kms_chamelium@vga-hpd:
    - shard-apl:          NOTRUN -> [SKIP][38] ([fdo#109271] / [fdo#111827]) +20 similar issues
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl7/igt@kms_chamelium@vga-hpd.html

  * igt@kms_chamelium@vga-hpd-after-suspend:
    - shard-skl:          NOTRUN -> [SKIP][39] ([fdo#109271] / [fdo#111827]) +3 similar issues
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@kms_chamelium@vga-hpd-after-suspend.html

  * igt@kms_color_chamelium@pipe-a-ctm-0-25:
    - shard-snb:          NOTRUN -> [SKIP][40] ([fdo#109271] / [fdo#111827]) +15 similar issues
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb2/igt@kms_color_chamelium@pipe-a-ctm-0-25.html

  * igt@kms_color_chamelium@pipe-a-degamma:
    - shard-kbl:          NOTRUN -> [SKIP][41] ([fdo#109271] / [fdo#111827]) +6 similar issues
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl2/igt@kms_color_chamelium@pipe-a-degamma.html

  * igt@kms_content_protection@atomic-dpms:
    - shard-apl:          NOTRUN -> [TIMEOUT][42] ([i915#1319]) +1 similar issue
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl6/igt@kms_content_protection@atomic-dpms.html

  * igt@kms_cursor_crc@pipe-a-cursor-32x32-random:
    - shard-tglb:         NOTRUN -> [SKIP][43] ([i915#3319])
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@kms_cursor_crc@pipe-a-cursor-32x32-random.html

  * igt@kms_cursor_crc@pipe-b-cursor-suspend:
    - shard-apl:          [PASS][44] -> [DMESG-WARN][45] ([i915#180])
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-apl7/igt@kms_cursor_crc@pipe-b-cursor-suspend.html
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl6/igt@kms_cursor_crc@pipe-b-cursor-suspend.html

  * igt@kms_cursor_crc@pipe-c-cursor-suspend:
    - shard-kbl:          [PASS][46] -> [DMESG-WARN][47] ([i915#180]) +2 similar issues
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl7/igt@kms_cursor_crc@pipe-c-cursor-suspend.html
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl7/igt@kms_cursor_crc@pipe-c-cursor-suspend.html

  * igt@kms_cursor_edge_walk@pipe-d-128x128-right-edge:
    - shard-snb:          NOTRUN -> [SKIP][48] ([fdo#109271]) +291 similar issues
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-snb2/igt@kms_cursor_edge_walk@pipe-d-128x128-right-edge.html

  * igt@kms_cursor_legacy@pipe-d-torture-move:
    - shard-skl:          NOTRUN -> [SKIP][49] ([fdo#109271]) +68 similar issues
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@kms_cursor_legacy@pipe-d-torture-move.html

  * igt@kms_flip@2x-modeset-vs-vblank-race-interruptible:
    - shard-iclb:         NOTRUN -> [SKIP][50] ([fdo#109274]) +1 similar issue
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb4/igt@kms_flip@2x-modeset-vs-vblank-race-interruptible.html

  * igt@kms_flip_scaled_crc@flip-32bpp-ytile-to-32bpp-ytilegen12rcccs:
    - shard-skl:          NOTRUN -> [SKIP][51] ([fdo#109271] / [i915#2672])
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl3/igt@kms_flip_scaled_crc@flip-32bpp-ytile-to-32bpp-ytilegen12rcccs.html

  * igt@kms_flip_scaled_crc@flip-32bpp-ytileccs-to-64bpp-ytile:
    - shard-apl:          NOTRUN -> [SKIP][52] ([fdo#109271] / [i915#2642])
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl2/igt@kms_flip_scaled_crc@flip-32bpp-ytileccs-to-64bpp-ytile.html

  * igt@kms_frontbuffer_tracking@fbcpsr-2p-scndscrn-cur-indfb-draw-pwrite:
    - shard-iclb:         NOTRUN -> [SKIP][53] ([fdo#109280])
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb4/igt@kms_frontbuffer_tracking@fbcpsr-2p-scndscrn-cur-indfb-draw-pwrite.html

  * igt@kms_frontbuffer_tracking@psr-1p-primscrn-spr-indfb-draw-render:
    - shard-skl:          NOTRUN -> [FAIL][54] ([i915#49])
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@kms_frontbuffer_tracking@psr-1p-primscrn-spr-indfb-draw-render.html

  * igt@kms_hdr@bpc-switch:
    - shard-skl:          [PASS][55] -> [FAIL][56] ([i915#1188])
   [55]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl3/igt@kms_hdr@bpc-switch.html
   [56]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl3/igt@kms_hdr@bpc-switch.html

  * igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-d:
    - shard-apl:          NOTRUN -> [SKIP][57] ([fdo#109271] / [i915#533]) +2 similar issues
   [57]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl7/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-d.html

  * igt@kms_plane_alpha_blend@pipe-a-alpha-basic:
    - shard-skl:          NOTRUN -> [FAIL][58] ([fdo#108145] / [i915#265])
   [58]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@kms_plane_alpha_blend@pipe-a-alpha-basic.html

  * igt@kms_plane_alpha_blend@pipe-a-alpha-opaque-fb:
    - shard-apl:          NOTRUN -> [FAIL][59] ([fdo#108145] / [i915#265]) +3 similar issues
   [59]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl6/igt@kms_plane_alpha_blend@pipe-a-alpha-opaque-fb.html

  * igt@kms_plane_alpha_blend@pipe-a-alpha-transparent-fb:
    - shard-apl:          NOTRUN -> [FAIL][60] ([i915#265])
   [60]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl8/igt@kms_plane_alpha_blend@pipe-a-alpha-transparent-fb.html

  * igt@kms_plane_alpha_blend@pipe-b-alpha-basic:
    - shard-kbl:          NOTRUN -> [FAIL][61] ([fdo#108145] / [i915#265]) +1 similar issue
   [61]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@kms_plane_alpha_blend@pipe-b-alpha-basic.html

  * igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min:
    - shard-skl:          [PASS][62] -> [FAIL][63] ([fdo#108145] / [i915#265])
   [62]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl3/igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min.html
   [63]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl4/igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min.html

  * igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-1:
    - shard-kbl:          NOTRUN -> [SKIP][64] ([fdo#109271] / [i915#658])
   [64]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-1.html

  * igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-2:
    - shard-apl:          NOTRUN -> [SKIP][65] ([fdo#109271] / [i915#658]) +5 similar issues
   [65]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl3/igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-2.html

  * igt@kms_psr2_su@page_flip:
    - shard-skl:          NOTRUN -> [SKIP][66] ([fdo#109271] / [i915#658])
   [66]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl3/igt@kms_psr2_su@page_flip.html

  * igt@kms_psr@psr2_cursor_plane_move:
    - shard-tglb:         NOTRUN -> [FAIL][67] ([i915#132] / [i915#3467])
   [67]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@kms_psr@psr2_cursor_plane_move.html

  * igt@kms_psr@psr2_cursor_render:
    - shard-iclb:         [PASS][68] -> [SKIP][69] ([fdo#109441]) +1 similar issue
   [68]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb2/igt@kms_psr@psr2_cursor_render.html
   [69]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb6/igt@kms_psr@psr2_cursor_render.html

  * igt@kms_psr@suspend:
    - shard-skl:          [PASS][70] -> [INCOMPLETE][71] ([i915#146] / [i915#198])
   [70]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl6/igt@kms_psr@suspend.html
   [71]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl6/igt@kms_psr@suspend.html

  * igt@kms_tv_load_detect@load-detect:
    - shard-iclb:         NOTRUN -> [SKIP][72] ([fdo#109309])
   [72]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb4/igt@kms_tv_load_detect@load-detect.html

  * igt@kms_vblank@pipe-a-ts-continuation-suspend:
    - shard-kbl:          [PASS][73] -> [DMESG-WARN][74] ([i915#180] / [i915#295])
   [73]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl3/igt@kms_vblank@pipe-a-ts-continuation-suspend.html
   [74]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl7/igt@kms_vblank@pipe-a-ts-continuation-suspend.html

  * igt@kms_vblank@pipe-d-wait-idle:
    - shard-kbl:          NOTRUN -> [SKIP][75] ([fdo#109271] / [i915#533])
   [75]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@kms_vblank@pipe-d-wait-idle.html

  * igt@kms_writeback@writeback-invalid-parameters:
    - shard-apl:          NOTRUN -> [SKIP][76] ([fdo#109271] / [i915#2437])
   [76]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl6/igt@kms_writeback@writeback-invalid-parameters.html

  * igt@prime_nv_api@i915_nv_reimport_twice_check_flink_name:
    - shard-apl:          NOTRUN -> [SKIP][77] ([fdo#109271]) +234 similar issues
   [77]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl7/igt@prime_nv_api@i915_nv_reimport_twice_check_flink_name.html

  * igt@prime_nv_api@i915_self_import:
    - shard-tglb:         NOTRUN -> [SKIP][78] ([fdo#109291])
   [78]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@prime_nv_api@i915_self_import.html

  * igt@prime_nv_pcopy@test2:
    - shard-kbl:          NOTRUN -> [SKIP][79] ([fdo#109271]) +50 similar issues
   [79]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl2/igt@prime_nv_pcopy@test2.html

  * igt@prime_vgem@sync@rcs0:
    - shard-iclb:         [PASS][80] -> [INCOMPLETE][81] ([i915#409])
   [80]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb2/igt@prime_vgem@sync@rcs0.html
   [81]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb6/igt@prime_vgem@sync@rcs0.html

  * igt@sysfs_clients@fair-7:
    - shard-apl:          NOTRUN -> [SKIP][82] ([fdo#109271] / [i915#2994]) +4 similar issues
   [82]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-apl3/igt@sysfs_clients@fair-7.html

  * igt@sysfs_clients@sema-25:
    - shard-skl:          NOTRUN -> [SKIP][83] ([fdo#109271] / [i915#2994]) +1 similar issue
   [83]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@sysfs_clients@sema-25.html

  
#### Possible fixes ####

  * igt@gem_eio@in-flight-suspend:
    - shard-skl:          [INCOMPLETE][84] ([i915#146] / [i915#198]) -> [PASS][85]
   [84]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl10/igt@gem_eio@in-flight-suspend.html
   [85]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@gem_eio@in-flight-suspend.html

  * igt@gem_exec_fair@basic-pace-share@rcs0:
    - shard-tglb:         [FAIL][86] ([i915#2842]) -> [PASS][87]
   [86]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-tglb5/igt@gem_exec_fair@basic-pace-share@rcs0.html
   [87]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@gem_exec_fair@basic-pace-share@rcs0.html
    - shard-glk:          [FAIL][88] ([i915#2842]) -> [PASS][89]
   [88]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-glk6/igt@gem_exec_fair@basic-pace-share@rcs0.html
   [89]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-glk6/igt@gem_exec_fair@basic-pace-share@rcs0.html

  * igt@gem_exec_fair@basic-pace@vcs1:
    - shard-kbl:          [SKIP][90] ([fdo#109271]) -> [PASS][91]
   [90]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@gem_exec_fair@basic-pace@vcs1.html
   [91]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl4/igt@gem_exec_fair@basic-pace@vcs1.html

  * igt@gem_mmap_gtt@big-copy:
    - shard-glk:          [FAIL][92] ([i915#307]) -> [PASS][93]
   [92]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-glk7/igt@gem_mmap_gtt@big-copy.html
   [93]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-glk7/igt@gem_mmap_gtt@big-copy.html

  * igt@gem_mmap_gtt@cpuset-basic-small-copy:
    - shard-skl:          [INCOMPLETE][94] ([i915#198] / [i915#3468]) -> [PASS][95]
   [94]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl10/igt@gem_mmap_gtt@cpuset-basic-small-copy.html
   [95]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl2/igt@gem_mmap_gtt@cpuset-basic-small-copy.html
    - shard-kbl:          [INCOMPLETE][96] ([i915#3468]) -> [PASS][97]
   [96]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl4/igt@gem_mmap_gtt@cpuset-basic-small-copy.html
   [97]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl2/igt@gem_mmap_gtt@cpuset-basic-small-copy.html

  * igt@gem_mmap_gtt@cpuset-basic-small-copy-odd:
    - shard-tglb:         [INCOMPLETE][98] ([i915#2910] / [i915#3468]) -> [PASS][99]
   [98]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-tglb3/igt@gem_mmap_gtt@cpuset-basic-small-copy-odd.html
   [99]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@gem_mmap_gtt@cpuset-basic-small-copy-odd.html

  * igt@gem_mmap_gtt@cpuset-medium-copy-odd:
    - shard-iclb:         [FAIL][100] ([i915#307]) -> [PASS][101]
   [100]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb6/igt@gem_mmap_gtt@cpuset-medium-copy-odd.html
   [101]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb1/igt@gem_mmap_gtt@cpuset-medium-copy-odd.html

  * igt@gem_ppgtt@flink-and-close-vma-leak:
    - shard-glk:          [FAIL][102] ([i915#644]) -> [PASS][103]
   [102]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-glk1/igt@gem_ppgtt@flink-and-close-vma-leak.html
   [103]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-glk4/igt@gem_ppgtt@flink-and-close-vma-leak.html

  * igt@kms_cursor_crc@pipe-a-cursor-256x256-onscreen:
    - shard-skl:          [FAIL][104] ([i915#3444]) -> [PASS][105]
   [104]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl4/igt@kms_cursor_crc@pipe-a-cursor-256x256-onscreen.html
   [105]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl5/igt@kms_cursor_crc@pipe-a-cursor-256x256-onscreen.html

  * igt@kms_cursor_legacy@2x-long-flip-vs-cursor-legacy:
    - shard-glk:          [FAIL][106] ([i915#72]) -> [PASS][107]
   [106]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-glk5/igt@kms_cursor_legacy@2x-long-flip-vs-cursor-legacy.html
   [107]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-glk7/igt@kms_cursor_legacy@2x-long-flip-vs-cursor-legacy.html

  * igt@kms_flip@flip-vs-rmfb@a-edp1:
    - shard-skl:          [DMESG-WARN][108] ([i915#1982]) -> [PASS][109] +1 similar issue
   [108]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl1/igt@kms_flip@flip-vs-rmfb@a-edp1.html
   [109]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl3/igt@kms_flip@flip-vs-rmfb@a-edp1.html

  * igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
    - shard-kbl:          [DMESG-WARN][110] ([i915#180]) -> [PASS][111] +3 similar issues
   [110]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a.html
   [111]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a.html

  * igt@kms_plane_alpha_blend@pipe-c-coverage-7efc:
    - shard-skl:          [FAIL][112] ([fdo#108145] / [i915#265]) -> [PASS][113] +1 similar issue
   [112]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl5/igt@kms_plane_alpha_blend@pipe-c-coverage-7efc.html
   [113]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl1/igt@kms_plane_alpha_blend@pipe-c-coverage-7efc.html

  * igt@kms_psr@psr2_sprite_plane_move:
    - shard-iclb:         [SKIP][114] ([fdo#109441]) -> [PASS][115] +3 similar issues
   [114]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb1/igt@kms_psr@psr2_sprite_plane_move.html
   [115]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb2/igt@kms_psr@psr2_sprite_plane_move.html

  * igt@perf@polling-parameterized:
    - shard-skl:          [FAIL][116] ([i915#1542]) -> [PASS][117]
   [116]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl9/igt@perf@polling-parameterized.html
   [117]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl6/igt@perf@polling-parameterized.html

  * igt@perf@polling-small-buf:
    - shard-skl:          [FAIL][118] ([i915#1722]) -> [PASS][119]
   [118]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-skl9/igt@perf@polling-small-buf.html
   [119]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-skl6/igt@perf@polling-small-buf.html

  
#### Warnings ####

  * igt@i915_pm_rc6_residency@rc6-fence:
    - shard-iclb:         [WARN][120] ([i915#2684]) -> [WARN][121] ([i915#1804] / [i915#2684])
   [120]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb1/igt@i915_pm_rc6_residency@rc6-fence.html
   [121]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb7/igt@i915_pm_rc6_residency@rc6-fence.html

  * igt@i915_pm_rc6_residency@rc6-idle:
    - shard-tglb:         [WARN][122] ([i915#2681] / [i915#2684]) -> [FAIL][123] ([i915#2681])
   [122]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-tglb7/igt@i915_pm_rc6_residency@rc6-idle.html
   [123]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-tglb2/igt@i915_pm_rc6_residency@rc6-idle.html
    - shard-iclb:         [WARN][124] ([i915#1804] / [i915#2684]) -> [WARN][125] ([i915#2684])
   [124]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb6/igt@i915_pm_rc6_residency@rc6-idle.html
   [125]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb1/igt@i915_pm_rc6_residency@rc6-idle.html

  * igt@kms_psr2_sf@plane-move-sf-dmg-area-3:
    - shard-iclb:         [SKIP][126] ([i915#2920]) -> [SKIP][127] ([i915#658]) +2 similar issues
   [126]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb2/igt@kms_psr2_sf@plane-move-sf-dmg-area-3.html
   [127]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb4/igt@kms_psr2_sf@plane-move-sf-dmg-area-3.html

  * igt@kms_psr2_sf@primary-plane-update-sf-dmg-area-1:
    - shard-iclb:         [SKIP][128] ([i915#658]) -> [SKIP][129] ([i915#2920]) +2 similar issues
   [128]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-iclb1/igt@kms_psr2_sf@primary-plane-update-sf-dmg-area-1.html
   [129]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-iclb2/igt@kms_psr2_sf@primary-plane-update-sf-dmg-area-1.html

  * igt@runner@aborted:
    - shard-kbl:          ([FAIL][130], [FAIL][131], [FAIL][132], [FAIL][133], [FAIL][134], [FAIL][135], [FAIL][136], [FAIL][137], [FAIL][138], [FAIL][139], [FAIL][140], [FAIL][141], [FAIL][142], [FAIL][143]) ([i915#1436] / [i915#180] / [i915#1814] / [i915#2722] / [i915#3002] / [i915#3363]) -> ([FAIL][144], [FAIL][145], [FAIL][146], [FAIL][147], [FAIL][148], [FAIL][149], [FAIL][150], [FAIL][151], [FAIL][152], [FAIL][153], [FAIL][154], [FAIL][155], [FAIL][156], [FAIL][157], [FAIL][158]) ([i915#1436] / [i915#180] / [i915#1814] / [i915#2722] / [i915#3002] / [i915#3363] / [i915#602])
   [130]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@runner@aborted.html
   [131]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl2/igt@runner@aborted.html
   [132]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@runner@aborted.html
   [133]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl2/igt@runner@aborted.html
   [134]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@runner@aborted.html
   [135]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl7/igt@runner@aborted.html
   [136]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl4/igt@runner@aborted.html
   [137]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl2/igt@runner@aborted.html
   [138]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@runner@aborted.html
   [139]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl7/igt@runner@aborted.html
   [140]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl3/igt@runner@aborted.html
   [141]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@runner@aborted.html
   [142]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl1/igt@runner@aborted.html
   [143]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10133/shard-kbl3/igt@runner@aborted.html
   [144]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@runner@aborted.html
   [145]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl1/igt@runner@aborted.html
   [146]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl2/igt@runner@aborted.html
   [147]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl3/igt@runner@aborted.html
   [148]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/shard-kbl1/igt@runner@abo

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_20202/index.html

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[Intel-gfx] [PATCH v3 0/1] Enabling dithering after the CC1

[Nischal Varide]

v3 : Addressed Review Comments by (Bhanu)

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

If the panel is 12bpc and display_ver < 13 then we can not enable
dithering at all.So this v3 version of the patch has added an extra 
check to fix it.

Nischal Varide (1):
  drm/i915/xelpd: Enabling dithering after the CC1

 drivers/gpu/drm/i915/display/intel_color.c   |  7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 11 ++++++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  1 +
 3 files changed, 18 insertions(+), 1 deletion(-)

-- 
2.29.2

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[Intel-gfx] [PATCH v3 1/1] drm/i915/xelpd: Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Signed-off-by: Nischal Varide <nischal.varide@intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c   |  7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 11 ++++++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  1 +
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index dab892d2251b..e11b3dbf0b95 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1574,6 +1574,7 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
 static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 {
 	u32 gamma_mode = 0;
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 
 	if (crtc_state->hw.degamma_lut)
 		gamma_mode |= PRE_CSC_GAMMA_ENABLE;
@@ -1588,6 +1589,12 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 	else
 		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
 
+	if (DISPLAY_VER(i915) >= 13) {
+		if (!crtc_state->dither_force_disable &&
+				(crtc_state->pipe_bpp == 36))
+			gamma_mode |= POST_CC1_GAMMA_ENABLE;
+	}
+
 	return gamma_mode;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index caf0414e0b50..5345779cfce2 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5762,7 +5762,16 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
 		break;
 	}
 
-	if (crtc_state->dither)
+	/*
+	 * If 12bpc panel then, Enables dithering after the CC1 pipe
+	 * post color space conversion and not here for display_ver
+	 * greater than or equal to thirteen.
+	 */
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
+		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp == 36) && (DISPLAY_VER(dev_priv) < 13))
 		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
 
 	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 24307c49085f..fa800a77ea49 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7743,6 +7743,7 @@ enum {
 #define GAMMA_MODE(pipe) _MMIO_PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
 #define  PRE_CSC_GAMMA_ENABLE	(1 << 31)
 #define  POST_CSC_GAMMA_ENABLE	(1 << 30)
+#define  POST_CC1_GAMMA_ENABLE  (1 << 26)
 #define  GAMMA_MODE_MODE_MASK	(3 << 0)
 #define  GAMMA_MODE_MODE_8BIT	(0 << 0)
 #define  GAMMA_MODE_MODE_10BIT	(1 << 0)
-- 
2.29.2

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[Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/xelpd: Enabling dithering after the CC1 (rev3)

[Patchwork]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1 (rev3)
URL   : https://patchwork.freedesktop.org/series/90594/
State : failure

== Summary ==

CALL    scripts/checksyscalls.sh
  CALL    scripts/atomic/check-atomics.sh
  DESCEND objtool
  CHK     include/generated/compile.h
  CC [M]  drivers/gpu/drm/i915/display/intel_display_debugfs.o
drivers/gpu/drm/i915/display/intel_display_debugfs.c: In function ‘dither_state_show’:
drivers/gpu/drm/i915/display/intel_display_debugfs.c:2179:29: error: ‘GAMMA_MODE_DITHER_AFTER_CC1’ undeclared (first use in this function); did you mean ‘DRM_MODE_DITHERING_ON’?
   (crtc_state->gamma_mode & GAMMA_MODE_DITHER_AFTER_CC1) ? 1 : 0);
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
                             DRM_MODE_DITHERING_ON
drivers/gpu/drm/i915/display/intel_display_debugfs.c:2179:29: note: each undeclared identifier is reported only once for each function it appears in
scripts/Makefile.build:272: recipe for target 'drivers/gpu/drm/i915/display/intel_display_debugfs.o' failed
make[4]: *** [drivers/gpu/drm/i915/display/intel_display_debugfs.o] Error 1
scripts/Makefile.build:515: recipe for target 'drivers/gpu/drm/i915' failed
make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:515: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:515: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1844: recipe for target 'drivers' failed
make: *** [drivers] Error 2


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[Intel-gfx] [PATCH] drm/i915/xelpd: Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Signed-off-by: Nischal Varide <nischal.varide@intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c   |  7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c | 11 ++++++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  1 +
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index dab892d2251b..c7af583200c4 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1574,6 +1574,7 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
 static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 {
 	u32 gamma_mode = 0;
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 
 	if (crtc_state->hw.degamma_lut)
 		gamma_mode |= PRE_CSC_GAMMA_ENABLE;
@@ -1588,6 +1589,12 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
 	else
 		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
 
+	if (DISPLAY_VER(i915) >= 13) {
+		if (!crtc_state->dither_force_disable &&
+				(crtc_state->pipe_bpp == 36))
+			gamma_mode |= POST_CC1_DITHER_ENABLE;
+	}
+
 	return gamma_mode;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 362bff9beb5c..3a7feb246745 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5762,7 +5762,16 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
 		break;
 	}
 
-	if (crtc_state->dither)
+	/*
+	 * If 12bpc panel then, Enables dithering after the CC1 pipe
+	 * post color space conversion and not here for display_ver
+	 * greater than or equal to thirteen.
+	 */
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))
+		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
+
+	if (crtc_state->dither && (crtc_state->pipe_bpp == 36) && (DISPLAY_VER(dev_priv) < 13))
 		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
 
 	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index e915ec034c98..33dba13fa94d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7743,6 +7743,7 @@ enum {
 #define GAMMA_MODE(pipe) _MMIO_PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
 #define  PRE_CSC_GAMMA_ENABLE	(1 << 31)
 #define  POST_CSC_GAMMA_ENABLE	(1 << 30)
+#define  POST_CC1_DITHER_ENABLE (1 << 26)
 #define  GAMMA_MODE_MODE_MASK	(3 << 0)
 #define  GAMMA_MODE_MODE_8BIT	(0 << 0)
 #define  GAMMA_MODE_MODE_10BIT	(1 << 0)
-- 
2.29.2

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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/91383/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
5e4918ee506b drm/i915/xelpd: Enabling dithering after the CC1
-:30: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp == 36'
#30: FILE: drivers/gpu/drm/i915/display/intel_color.c:1593:
+		if (!crtc_state->dither_force_disable &&
+				(crtc_state->pipe_bpp == 36))

-:31: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#31: FILE: drivers/gpu/drm/i915/display/intel_color.c:1594:
+		if (!crtc_state->dither_force_disable &&
+				(crtc_state->pipe_bpp == 36))

-:53: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp != 36'
#53: FILE: drivers/gpu/drm/i915/display/intel_display.c:5771:
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))

-:56: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp == 36'
#56: FILE: drivers/gpu/drm/i915/display/intel_display.c:5774:
+	if (crtc_state->dither && (crtc_state->pipe_bpp == 36) && (DISPLAY_VER(dev_priv) < 13))

total: 0 errors, 0 warnings, 4 checks, 43 lines checked


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[Intel-gfx] [PATCH v1 0/1] drm/i915/xelpd: Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Nischal Varide (1):
  drm/i915/xelpd: Enabling dithering after the CC1

 drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
 drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
 3 files changed, 23 insertions(+), 2 deletions(-)

-- 
2.29.2

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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/90583/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
a7d93728c6c9 drm/i915/xelpd: Enabling dithering after the CC1
-:27: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp == 36'
#27: FILE: drivers/gpu/drm/i915/display/intel_color.c:1614:
+		if (!crtc_state->dither_force_disable &&
+		    (crtc_state->pipe_bpp == 36))

-:60: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp != 36'
#60: FILE: drivers/gpu/drm/i915/display/intel_display.c:5749:
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))

total: 0 errors, 0 warnings, 2 checks, 55 lines checked


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[Intel-gfx] [PATCH v1 0/1] drm/i915/xelpd: Enabling dithering after the CC1

[Nischal Varide]

If the panel is 12bpc then Dithering is not enabled in the Legacy
dithering block , instead its Enabled after the C1 CC1 pipe post
color space conversion.For a 6bpc pannel Dithering is enabled in
Legacy block.

Nischal Varide (1):
  drm/i915/xelpd: Enabling dithering after the CC1

 drivers/gpu/drm/i915/display/intel_color.c   | 15 +++++++++++++++
 drivers/gpu/drm/i915/display/intel_display.c |  7 ++++++-
 drivers/gpu/drm/i915/i915_reg.h              |  3 ++-
 3 files changed, 23 insertions(+), 2 deletions(-)

-- 
2.29.2

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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/xelpd: Enabling dithering after the CC1

[Patchwork]

== Series Details ==

Series: drm/i915/xelpd: Enabling dithering after the CC1
URL   : https://patchwork.freedesktop.org/series/90582/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
6abe80f275a2 drm/i915/xelpd: Enabling dithering after the CC1
-:27: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp == 36'
#27: FILE: drivers/gpu/drm/i915/display/intel_color.c:1614:
+		if (!crtc_state->dither_force_disable &&
+		    (crtc_state->pipe_bpp == 36))

-:60: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'crtc_state->pipe_bpp != 36'
#60: FILE: drivers/gpu/drm/i915/display/intel_display.c:5749:
+	if (crtc_state->dither && (crtc_state->pipe_bpp != 36))

total: 0 errors, 0 warnings, 2 checks, 55 lines checked


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