linux-kernel - [PATCH v2 0/3] drm/panthor: Coherency related fixes

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Message-Id: <20241030225407.4077513-1-akash.goel@arm.com>
Date: Wed, 30 Oct 2024 22:54:04 +0000
From: Akash Goel <akash.goel@....com>
To: boris.brezillon@...labora.com,
	liviu.dudau@....com,
	steven.price@....com
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	mihail.atanassov@....com,
	ketil.johnsen@....com,
	florent.tomasin@....com,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	daniel@...ll.ch,
	nd@....com,
	Akash Goel <akash.goel@....com>
Subject: [PATCH v2 0/3] drm/panthor: Coherency related fixes

This patch series contains 3 cache coherency related fixes for the
Panthor driver.
- The first fix, regarding the Inner-shareability, is mandatory to
  ensure things work on all platforms (including Juno FPGA) when
  no_coherency protocol is selected.
- The second fix regarding the coherency feature/enable register is
  required to avoid potential misalignment on certain platforms.
- The third fix, regarding the potential overwrite of buffer objects,
  has been prepared speculatively & it may not be required in practice.

v2:
- Added r-b tags for the first 2 patches

Akash Goel (3):
  drm/panthor: Update memattr programing to align with GPU spec
  drm/panthor: Explicitly set the coherency mode
  drm/panthor: Prevent potential overwrite of buffer objects

 drivers/gpu/drm/panthor/panthor_device.c | 22 ++++++++++++++++++-
 drivers/gpu/drm/panthor/panthor_gem.h    | 10 +++++++++
 drivers/gpu/drm/panthor/panthor_gpu.c    |  9 ++++++++
 drivers/gpu/drm/panthor/panthor_mmu.c    | 28 +++++++++++++++++-------
 4 files changed, 60 insertions(+), 9 deletions(-)

-- 
2.25.1