linux-kernel - [PATCH v5 0/6] Add support to print sub-block registers in dpu hw catalog

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Date:   Fri, 7 Jul 2023 18:24:39 -0700
From:   Ryan McCann <quic_rmccann@...cinc.com>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
CC:     Rob Clark <robdclark@...omium.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <quic_jesszhan@...cinc.com>, Ryan McCann <quic_rmccann@...cinc.com>
Subject: [PATCH v5 0/6] Add support to print sub-block registers in dpu hw
 catalog

The purpose of this patch series is to add support to print the registers
of sub-blocks in the DPU hardware catalog and fix the order in which all
hardware blocks are dumped for a device core dump. This involves:

1. Changing data structure from stack to queue to fix the printing order
of the device core dump.

2. Removing redundant suffix of sub-block names.

3. Removing redundant prefix of sub-block names.

4. Eliminating unused variable from relevant macros.

5. Defining names for sub-blocks that have not yet been defined.

6. Implementing wrapper function that prints the registers of sub-blocks
when there is a need.

Sample Output of the sspp_0 block and its sub-blocks for devcore dump:
======sspp_0======
...registers
...
====sspp_0_scaler====
...
...
====sspp_0_csc====
...
...
====next_block====
...

This series depends on https://patchwork.freedesktop.org/series/119776/.

---
Changes in v5:
- Fixed indentation in refactor main block printing patch
- Fixed formatting issues to satisfy checkpatch
- Instead of passing 0 for DSC block, used actual length thanks to https://patchwork.freedesktop.org/series/119776/
- Link to v4: https://lore.kernel.org/r/20230622-devcoredump_patch-v4-0-e304ddbe9648@quicinc.com

Changes in v4:
- Added review tags
- Link to v3: https://lore.kernel.org/r/20230622-devcoredump_patch-v3-0-83601b72eb67@quicinc.com

Changes in v3:
- Split sub-block changes and main block changes into two commits
- Corrected typo in comment located in DSC for loop block
- Eliminated variables mmio and base
- Dropped unnecessary "%s"
- Link to v2: https://lore.kernel.org/r/20230622-devcoredump_patch-v2-0-9e90a87d393f@quicinc.com

Changes in v2:
- Changed spelling "sub block" to "sub-block" or "sblk".
- Capitalized DPU.
- Eliminated multiplexer/wrapper function. Inlined instead.
- Changed if statements from feature checks to length checks.
- Squashed prefix and suffix patch into one.
- Link to v1: https://lore.kernel.org/r/20230622-devcoredump_patch-v1-0-3b2cdcc6a576@quicinc.com

---
Ryan McCann (6):
      drm/msm: Update dev core dump to not print backwards
      drm/msm/dpu: Drop unused num argument from relevant macros
      drm/msm/dpu: Define names for unnamed sblks
      drm/msm/dpu: Remove redundant prefix/suffix in name of sub-blocks
      drm/msm/dpu: Refactor printing of main blocks in device core dump
      drm/msm/dpu: Update dev core dump to dump registers of sub-blocks

 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c    | 90 +++++++++++------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c           | 74 +++++++++++++++----
 drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c |  2 +-
 3 files changed, 104 insertions(+), 62 deletions(-)
---
base-commit: a92b5625851098af521cd92e4c518429b661c8f4
change-id: 20230622-devcoredump_patch-df7e8f6fd632

Best regards,
-- 
Ryan McCann <quic_rmccann@...cinc.com>