Message-ID: <55D40F2A.6000208@codeaurora.org>
Date: Wed, 19 Aug 2015 10:37:54 +0530
From: Archit Taneja <architt@codeaurora.org>
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CC: linux-arm-msm@vger.kernel.org, treding@nvidia.com, inki.dae@samsung.com,
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Subject: Re: [RFC 0/2] drm/dsi: DSI for devices with different control bus
References: <1435641851-27295-1-git-send-email-architt@codeaurora.org>
In-Reply-To: <1435641851-27295-1-git-send-email-architt@codeaurora.org>
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Hi,

On 06/30/2015 10:54 AM, Archit Taneja wrote:
> 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.
>
> The method presented in these patches is to provide an API to create a
> 'dummy' mipi_dsi_device. This device is populated with the desired DSI
> params, which are passed on to the host via mipi_dsi_attach().
>
> This method will require the device driver to get a phandle to the DSI
> host since there is no parent-child relation between the two.
>
> Is there a better way to do this? Please let me know!

Any comments on this?

Archit

>
> Archit Taneja (2):
>    drm/dsi: Create dummy DSI devices
>    drm/dsi: Get DSI host by DT device node
>
>   drivers/gpu/drm/drm_mipi_dsi.c | 108 ++++++++++++++++++++++++++++++++++++++++-
>   include/drm/drm_mipi_dsi.h     |   4 ++
>   2 files changed, 110 insertions(+), 2 deletions(-)
>

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