linux-kernel - [PATCH v7 0/5] drm/xe: i2c support

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Message-Id: <20250710071612.2714990-1-raag.jadav@intel.com>
Date: Thu, 10 Jul 2025 12:46:07 +0530
From: Raag Jadav <raag.jadav@...el.com>
To: lucas.demarchi@...el.com,
	thomas.hellstrom@...ux.intel.com,
	rodrigo.vivi@...el.com
Cc: jarkko.nikula@...ux.intel.com,
	airlied@...il.com,
	simona@...ll.ch,
	andriy.shevchenko@...ux.intel.com,
	mika.westerberg@...ux.intel.com,
	jsd@...ihalf.com,
	andi.shyti@...nel.org,
	raag.jadav@...el.com,
	riana.tauro@...el.com,
	srinivasa.adatrao@...el.com,
	michael.j.ruhl@...el.com,
	intel-xe@...ts.freedesktop.org,
	linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v7 0/5] drm/xe: i2c support

Hi,

On behalf of Heikki, since he's on vacation.

Changed since v6:
- Fix SPDX checkpatch warning.

Changed since v5:
- The modification to the dw_i2c_plat_probe() is split into its own
  patch as proposed by Andi.
- I removed completely the comment from the last patch in the series
  ("drm/xe/xe_i2c: Add support for i2c in survivability mode").

Changed since v4:
- Cleanups requested by Andy.
- Casting the PCI power modes to make sparse happy - Raag.
- Limiting the use of this thing to Battlemage again. But I'm not sure
  if this is the correct thing to do.

Changed since v3:
- Cleanups as requested by Rodrigo.
- The licence is now changed, but still need confirmation for it!

Changed since v2:
- Added dependency on regmap when i2c is enabled.

Changed since v1:
- Now rebased on top of drm-tip.
- No longer ignoring errors from xe_i2c_probe().
- Cleanups pointed out by Lucas.

I've also included followup patches from Raag and Riana to this
series.

Original cover letter:

Some of the future GPUs will provide access to the on-board Synopsys
DesignWare I2C host adapter. The i2c is used to connect various
microcontrollers. The initially supported microcontroller unit is
called Add-In Management Controller (AMC).

Thanks,

Heikki Krogerus (3):
  i2c: designware: Use polling by default when there is no irq resource
  i2c: designware: Add quirk for Intel Xe
  drm/xe: Support for I2C attached MCUs

Raag Jadav (1):
  drm/xe/pm: Wire up suspend/resume for I2C controller

Riana Tauro (1):
  drm/xe/xe_i2c: Add support for i2c in survivability mode

 drivers/gpu/drm/xe/Kconfig                  |   1 +
 drivers/gpu/drm/xe/Makefile                 |   1 +
 drivers/gpu/drm/xe/regs/xe_i2c_regs.h       |  20 ++
 drivers/gpu/drm/xe/regs/xe_irq_regs.h       |   1 +
 drivers/gpu/drm/xe/regs/xe_pmt.h            |   2 +-
 drivers/gpu/drm/xe/regs/xe_regs.h           |   2 +
 drivers/gpu/drm/xe/xe_device.c              |   5 +
 drivers/gpu/drm/xe/xe_device_types.h        |   4 +
 drivers/gpu/drm/xe/xe_i2c.c                 | 329 ++++++++++++++++++++
 drivers/gpu/drm/xe/xe_i2c.h                 |  62 ++++
 drivers/gpu/drm/xe/xe_irq.c                 |   2 +
 drivers/gpu/drm/xe/xe_pm.c                  |   9 +
 drivers/gpu/drm/xe/xe_survivability_mode.c  |  19 +-
 drivers/i2c/busses/i2c-designware-platdrv.c |  18 +-
 14 files changed, 460 insertions(+), 15 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/regs/xe_i2c_regs.h
 create mode 100644 drivers/gpu/drm/xe/xe_i2c.c
 create mode 100644 drivers/gpu/drm/xe/xe_i2c.h

-- 
2.34.1