linux-kernel - Re: [PATCH] arm64: bcm2837 dts: enable bcm2708 frambuffer driver for the raspberry pi-3

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Date:   Mon, 14 Aug 2017 11:22:41 -0700
From:   Eric Anholt <eric@...olt.net>
To:     VOTARY GITHUB <github.raspberrypi@...arytech.com>,
        "linux\@armlinux.org.uk" <linux@...linux.org.uk>,
        "lee\@kernel.org" <lee@...nel.org>,
        "stefan.wahren\@i2se.com" <stefan.wahren@...e.com>,
        "f.fainelli\@gmail.com" <f.fainelli@...il.com>,
        "rjui\@broadcom.com" <rjui@...adcom.com>,
        "sbranden\@broadcom.com" <sbranden@...adcom.com>,
        "bcm-kernel-feedback-list\@broadcom.com" 
        <bcm-kernel-feedback-list@...adcom.com>,
        "catalin.marinas\@arm.com" <catalin.marinas@....com>,
        "will.deacon\@arm.com" <will.deacon@....com>,
        "github.raspberrypi\@votarytech.com" 
        <github.raspberrypi@...arytech.com>,
        "ijc\@hellion.org.uk" <ijc@...lion.org.uk>,
        "andrea.merello\@gmail.com" <andrea.merello@...il.com>,
        "linux-arm-kernel\@lists.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-rpi-kernel\@lists.infradead.org" 
        <linux-rpi-kernel@...ts.infradead.org>
Cc:     "robh+dt\@kernel.org" <robh+dt@...nel.org>,
        "mark.rutland\@arm.com" <mark.rutland@....com>,
        "devicetree\@vger.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: bcm2837 dts: enable bcm2708 frambuffer driver for the  raspberry pi-3

VOTARY GITHUB <github.raspberrypi@...arytech.com> writes:

> From 3200cb6fd787390df1bccf1bb1f7a67ca04136fd Mon Sep 17 00:00:00 2001
> From: VT-Github-Raspberrypi <github.raspberrypi@...arytech.com>
> Date: Tue, 8 Aug 2017 16:57:15 +0530
> Subject: [PATCH] arm64: bcm2837 dts: enable bcm2708 frambuffer driver for the
>  raspberry pi-3
>
> This fb drivers to make rendering full boot up logs on the screen.
>
> Fixed: https://github.com/raspberrypi/linux/issues/2156

I don't think we should be adding DT nodes for the old, downstream-only
fbdev driver to the upstream tree.  We have nodes already for the open
source driver that directly programs the hardware, which will disable
the firmware's closed-source modesetting interfaces used by bcm2708
fbdev.  For early boot display, the proper solution is simplefb, not a
custom fbdev driver.

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