[PATCH v6 0/4] drm/msm/hdmi & phy: use generic PHY framework

[Dmitry Baryshkov]

The MSM HDMI PHYs have been using the ad-hoc approach / API instead of
using the generic API framework. Move MSM HDMI PHY drivers to
drivers/phy/qualcomm and rework them to use generic PHY framework. This
way all the QMP-related code is kept at the same place.
Also MSM8974 HDMI PHY, 28nm DSI PHY and apq8964 SATA PHY now can use
common helpers for the UNI PLL.

This also causes some design changes. Currently on MSM8996 the HDMI PLL
implements clock's set_rate(), while other HDMI PHY drivers used the
ad-hoc PHY API for setting the PLL rate (this includes in-tree MSM8960
driver and posted, but not merged, MSM8974 driver). This might result in
the PLL being set to one rate, while the rest of the PHY being tuned to
work at another rate. Adopt the latter idea and always use
phy_configure() to tune the PHY and set the PLL rate.

Merge strategy: cross-tree merge via the immutable tag.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
---
Changes in v6:
- Changed MSM8974 HDMI PHY driver to use FIELD_PREP / FIELD_GET (Konrad)
- Fixed rate recalculation for MSM8974 HDMI PHY (Konrad)
- Dropped register read/write wrappers
- Link to v5: https://lore.kernel.org/r/20260314-fd-hdmi-phy-v5-0-58122ae96d3b@xxxxxxxxxxxxxxxx

Changes in v5:
- Kept only a single place which handles extp clk (after PHY power on,
  before PHY power off) (Neil)
- Inlined pm_runtime calls in the HDMI TX driver, replaced
  pm_runtime_resume_and_get() with pm_runtime_get_sync(), since
  atomic_pre_enable() can not fail.
- Renamed registers defines to drop the REG_ prefix.
- Link to v4: https://lore.kernel.org/r/20250520-fd-hdmi-phy-v4-0-fcbaa652ad75@xxxxxxxxxxxxxxxx

Changes in v3-v4:
- Rebased on top of linux-next, solving conflicts
- Squashed add-and-remove patches into a single git mv patch
- Dropped HDMI PHY header patch (merged upstream)

Changes in v2:
- Changed msm8960 / apq8064 to calculate register data instead of using
  fixed tables. This extends the list of supported modes.
  (Implementation is based on mdss-hdmi-pll-28lpm.c from msm-4.14).

- Fixed the reprogramming of PLL rate on apq8064.

- Merged all non-QMP HDMI PHY drivers into a common PHY_QCOM_HDMI
  driver (suggested by Rob Clark)

---
Dmitry Baryshkov (4):
      drm/msm/hdmi: switch to generic PHY subsystem
      phy: qcom: apq8064-sata: extract UNI PLL register defines
      phy: qcom-uniphy: add more registers from display PHYs
      phy: qualcomm: add MSM8974 HDMI PHY support

 drivers/gpu/drm/msm/Makefile                     |   7 -
 drivers/gpu/drm/msm/hdmi/hdmi.c                  |  58 +-
 drivers/gpu/drm/msm/hdmi/hdmi.h                  |  80 +--
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c           |  80 ++-
 drivers/gpu/drm/msm/hdmi/hdmi_phy.c              | 225 -------
 drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c         |  51 --
 drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c         | 761 ----------------------
 drivers/gpu/drm/msm/hdmi/hdmi_phy_8998.c         | 765 -----------------------
 drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c         | 141 -----
 drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c         |  44 --
 drivers/gpu/drm/msm/hdmi/hdmi_pll_8960.c         | 460 --------------
 drivers/gpu/drm/msm/registers/display/hdmi.xml   | 537 ----------------
 drivers/phy/qualcomm/Kconfig                     |  24 +
 drivers/phy/qualcomm/Makefile                    |  14 +
 drivers/phy/qualcomm/phy-qcom-apq8064-sata.c     |  23 +-
 drivers/phy/qualcomm/phy-qcom-hdmi-28hpm.c       | 352 +++++++++++
 drivers/phy/qualcomm/phy-qcom-hdmi-28lpm.c       | 462 ++++++++++++++
 drivers/phy/qualcomm/phy-qcom-hdmi-45nm.c        | 186 ++++++
 drivers/phy/qualcomm/phy-qcom-hdmi-preqmp.c      | 212 +++++++
 drivers/phy/qualcomm/phy-qcom-hdmi-preqmp.h      |  59 ++
 drivers/phy/qualcomm/phy-qcom-qmp-hdmi-base.c    | 185 ++++++
 drivers/phy/qualcomm/phy-qcom-qmp-hdmi-msm8996.c | 443 +++++++++++++
 drivers/phy/qualcomm/phy-qcom-qmp-hdmi-msm8998.c | 496 +++++++++++++++
 drivers/phy/qualcomm/phy-qcom-qmp-hdmi.h         |  77 +++
 drivers/phy/qualcomm/phy-qcom-uniphy.h           |  74 +++
 25 files changed, 2628 insertions(+), 3188 deletions(-)
---
base-commit: 95bcfacccdad8a76e02a8eaa92baaf09c879877e
change-id: 20240109-fd-hdmi-phy-44b8319fbcc7

Best regards,
-- 
With best wishes
Dmitry