linux-kernel - [PATCH RESEND v5 0/2] phy: qcom: edp: Allow eDP/DP configuring via set

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Message-Id: <20240324-x1e80100-phy-edp-compatible-refactor-v5-0-a0db5f3150bc@linaro.org>
Date: Sun, 24 Mar 2024 20:50:16 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 Johan Hovold <johan@...nel.org>
Cc: linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH RESEND v5 0/2] phy: qcom: edp: Allow eDP/DP configuring via
 set_mode op

Until now, all platform that supported both eDP and DP had different
compatibles for each mode. Using different compatibles for basically
the same IP block but for a different configuration is bad way all
around. There is a new compute platform from Qualcomm that supports
both eDP and DP with the same PHY. So instead of following the old
method, we should allow the submode to be configured via set_mode from
the controller driver.

The controller part will follow after we conclude the PHY part first.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
Changes in v5:
- Dropped the unnecessary ternary operator.
- Link to v4: https://lore.kernel.org/r/20240216-x1e80100-phy-edp-compatible-refactor-v4-0-c07fd1a52186@linaro.org

Changes in v4:
- Added todo comment about setting the value of cfg8 based on swing
  pre-emph availability, like Konrad suggested
- Fixed the condition in qcom_edp_phy_power_on, reported by Dmitry
- Link to v3: https://lore.kernel.org/r/20240129-x1e80100-phy-edp-compatible-refactor-v3-0-e71f3359c535@linaro.org

Changes in v3:
- Dropped needs_swing_pre_emph_cfg as we store the table instead
- Picking the table based on is_edp instead of overriding.
- Link to v2: https://lore.kernel.org/r/20231222-x1e80100-phy-edp-compatible-refactor-v2-0-ab5786c2359f@linaro.org

Changes in v2:
- Dropped the dedicated xlate function and added set_mode op instead
- Dropped the eDP PHY type and mode addition
- Added the DP PHY submodes (eDP and DP)
- Removed the device match data storing from the container struct
- Link to v1: https://lore.kernel.org/r/20231219-x1e80100-phy-edp-compatible-refactor-v1-0-f9e77752953d@linaro.org

Initial attepmpt was here:
https://lore.kernel.org/all/20231122-phy-qualcomm-edp-x1e80100-v3-3-576fc4e9559d@linaro.org/
Compared to that version, this one uses the phy-cells method and drops
the X1E80100 support. The X1E80100 support will be a separate patchset.

---
Abel Vesa (2):
      phy: Add Embedded DisplayPort and DisplayPort submodes
      phy: qcom: edp: Add set_mode op for configuring eDP/DP submode

 drivers/phy/qualcomm/phy-qcom-edp.c | 76 +++++++++++++++++++++++++++----------
 include/linux/phy/phy-dp.h          |  3 ++
 2 files changed, 59 insertions(+), 20 deletions(-)
---
base-commit: 2d5c7b7eb345249cb34d42cbc2b97b4c57ea944e
change-id: 20231219-x1e80100-phy-edp-compatible-refactor-8733eca7ccda

Best regards,
-- 
Abel Vesa <abel.vesa@...aro.org>