linux-kernel - [PATCH v5 0/5] drm/dsi: DSI for devices with different control bus

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Message-Id: <1455268714-28755-1-git-send-email-architt@codeaurora.org>
Date:	Fri, 12 Feb 2016 14:48:29 +0530
From:	Archit Taneja <architt@...eaurora.org>
To:	dri-devel@...ts.freedesktop.org, treding@...dia.com
Cc:	linux-kernel@...r.kernel.org, a.hajda@...sung.com,
	airlied@...ux.ie, daniel@...ll.ch, l.stach@...gutronix.de,
	robh@...nel.org, linux-arm-msm@...r.kernel.org,
	jani.nikula@...ux.intel.com, Archit Taneja <architt@...eaurora.org>
Subject: [PATCH v5 0/5] drm/dsi: DSI for devices with different control bus

We are currently restricted when it comes to supporting DSI on devices
that have a non-DSI control bus. For example, DSI encoder chips are
available in the market that are configured via i2c. Configuring their
registers via DSI bus is either optional or not available at all.

These devices still need to pass DSI parameters (data lanes, mode flags
etc) to the DSI host they are connected to. We don't have a way to do
that at the moment.

After some discussions on the previous RFC[1], we decided to support this
by providing additional API in drm_mipi_dsi.c which lets us create new DSI
devices without the need of them to have a DT node.

[1]: https://lkml.org/lkml/2015/6/30/42

Changes in v5:
- Simplify refactoring as suggested by Thierry.
- Use abbreviations correctly.
- Drop "drm/dsi: Check for used channels"
- Return the correct encoded error code for of_mipi_dsi_device_add
  when CONFIG_OF is disabled.
- Use mipi_dsi_device_unregister to implement mipi_dsi_remove_device_fn()
  too.

Changes in v4:
- Added a new patch that fixes build issues when CONFIG_OF is not set.

Changes in v3:

- Incorporated misc comments by Andrzej. Changed from RFC to a PATCH set.
- Fixed htmldocs warnings.


Archit Taneja (5):
  drm/dsi: check for CONFIG_OF when defining of_mipi_dsi_device_add
  drm/dsi: Use mipi_dsi_device_register_full for DSI device creation
  drm/dsi: Try to match non-DT DSI devices
  drm/dsi: Add routine to unregister a DSI device
  drm/dsi: Get DSI host by DT device node

 drivers/gpu/drm/drm_mipi_dsi.c | 127 +++++++++++++++++++++++++++++++++++++----
 include/drm/drm_mipi_dsi.h     |  26 +++++++++
 2 files changed, 141 insertions(+), 12 deletions(-)

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