linux-kernel - [PATCH v3 0/7] OPP and devfreq for all Adrenos

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Message-Id: <20230223-topic-opp-v3-0-5f22163cd1df@linaro.org>
Date:   Thu, 23 Feb 2023 11:51:56 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH v3 0/7] OPP and devfreq for all Adrenos

v2 -> v3:

- Add [2/7], x-ref with https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21484
- De-magic-ify the remaining BIT(6) in a2xx_busy (thanks Dmitry)
- Drop unnecessary else{} level in [3/7]
- Pick up tags

v2: https://lore.kernel.org/linux-arm-msm/20230223-topic-opp-v2-0-24ed24cd7358@linaro.org/

v1 -> v2:

- Move a2xx #defines to XML
- Use dev_pm_opp_find_freq_floor in the common path in [2/6]
- Clarify a comment in [2/6]
- Move voting from a5xx to Adreno-wide [6/6]
- Pick up tags

v1: https://lore.kernel.org/linux-arm-msm/20230222-konrad-longbois-next-v1-0-01021425781b@linaro.org

This series is a combination of [1] and a subset of [2] and some new
stuff.

With it, devfreq is used on all a2xx-a6xx (including gmu and
gmu-wrapper) and all clk_set_rate(core clock) calls are dropped in
favour of dev_pm_opp_set_rate, which - drumroll - lets us scale
the voltage domain. DT patches making use of that will be sent
separately.

On top of that, a5xx gets a call to enable icc scaling from the OPP
tables. No SoCs implementing a2xx have icc support yet and a3/4xx
SoCs have separate logic for that, which will be updated at a later
time.

Getting this in for 6.4 early would be appreciated, as that would
allow for getting GMU wrapper GPUs up (without VDD&icc scaling they
can only run at lower freqs, which is.. ehhh..)

Changes:
- a3xx busy: use the _1 counter as per msm-3.x instead of _0
- a6xx-series-opp: basically rewrite, ensure compat with all gens
- a2/4xx busy: new patch
- a5xx icc: new patch

[1] https://lore.kernel.org/linux-arm-msm/20230130093809.2079314-1-konrad.dybcio@linaro.org/
[2] https://lore.kernel.org/linux-arm-msm/20230214173145.2482651-1-konrad.dybcio@linaro.org/

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
Konrad Dybcio (7):
      drm/msm/a2xx: Include perf counter reg values in XML
      drm/msm/a2xx: Add REG_A2XX_RBBM_PM_OVERRIDE2 to XML
      drm/msm/adreno: Use OPP for every GPU generation
      drm/msm/a2xx: Implement .gpu_busy
      drm/msm/a3xx: Implement .gpu_busy
      drm/msm/a4xx: Implement .gpu_busy
      drm/msm/adreno: Enable optional icc voting from OPP tables

 drivers/gpu/drm/msm/adreno/a2xx.xml.h      | 18 ++++++
 drivers/gpu/drm/msm/adreno/a2xx_gpu.c      | 26 ++++++++
 drivers/gpu/drm/msm/adreno/a3xx_gpu.c      | 11 ++++
 drivers/gpu/drm/msm/adreno/a4xx_gpu.c      | 11 ++++
 drivers/gpu/drm/msm/adreno/adreno_device.c |  4 ++
 drivers/gpu/drm/msm/adreno/adreno_gpu.c    | 99 +++++++++++++-----------------
 drivers/gpu/drm/msm/msm_gpu.c              |  4 +-
 drivers/gpu/drm/msm/msm_gpu_devfreq.c      |  2 +-
 8 files changed, 117 insertions(+), 58 deletions(-)
---
base-commit: aaf70d5ad5e2b06a8050c51e278b0c3a14fabef5
change-id: 20230223-topic-opp-01e7112b867d

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@...aro.org>