Re: [PATCH v1 0/4] fbtft: Unorphan the driver for maintenance

From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Javier Martinez Canillas <javierm@redhat.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>,
	Andy Shevchenko <andy@kernel.org>,
	"open list:FRAMEBUFFER LAYER" <linux-fbdev@vger.kernel.org>,
	Michael Hennerich <michael.hennerich@analog.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Helge Deller <deller@gmx.de>,
	linux-staging@lists.linux.dev,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Phillip Potter <phil@philpotter.co.uk>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Carlis <zhangxuezhi1@yulong.com>,
	Lee Jones <lee.jones@linaro.org>,
	Heiner Kallweit <hkallweit1@gmail.com>
Subject: Re: [PATCH v1 0/4] fbtft: Unorphan the driver for maintenance
Date: Wed, 26 Jan 2022 15:17:27 +0200	[thread overview]
Message-ID: <YfFJ5ykgMi+wBc2f@smile.fi.intel.com> (raw)
In-Reply-To: <1b665bb8-7acb-519b-0a02-ef0f2dd4b524@redhat.com>

On Wed, Jan 26, 2022 at 01:37:00PM +0100, Javier Martinez Canillas wrote:
> On 1/26/22 11:28, Dan Carpenter wrote:
> > On Wed, Jan 26, 2022 at 12:04:26PM +0200, Andy Shevchenko wrote:
> >> On Wed, Jan 26, 2022 at 12:02 PM Andy Shevchenko
> >> <andy.shevchenko@gmail.com> wrote:
> >>> On Wed, Jan 26, 2022 at 10:52 AM Thomas Zimmermann <tzimmermann@suse.de> wrote:
> >>>> Am 25.01.22 um 21:21 schrieb Andy Shevchenko:
> >>
> >> ...
> >>
> >>>> But why? We already have DRM drivers for some of these devices.
> >>>
> >>> No, we do not (only a few are available).
> >>
> >> Sorry, I missed your word 'some'. Some == almost none from the list (I
> >> don't remember exact numbers but something like 2 out of 10 are
> >> supported by tiny DRM and see about interfaces).
> > 
> > Could we get an exact list?
> > 
> 
> The list AFAICT is the following. I'm not familiar with these so please
> feel free to correct anything I got wrong here.
> 
> I've marked with '?' if found references to the device supported by the
> fbdev driver in a DRM driver, but it's not clear if support the same HW.
> 
> Drivers in drivers/staging/fbtft:

Thanks!

Note, there is no support for the devices with parallel interface in the DRM.
So, basically we can't kill even a single one from fbtft if there is a user
for it.

>    fb_agm1264k-fl.c
>    fb_bd663474.c
>    fb_hx8340bn.c
>    fb_hx8347d.c (DRM driver in drivers/gpu/drm/tiny/hx8357d.c)
>    fb_hx8353d.c
>    fb_hx8357d.c (DRM driver in drivers/gpu/drm/tiny/hx8357d.c)
>    fb_ili9163.c (DRM driver in drivers/gpu/drm/tiny/ili9163.c)
>    fb_ili9320.c
>    fb_ili9325.c

>    fb_ili9340.c (DRM driver in drivers/gpu/drm/tiny/mi0283qt.c ?)

Not sure.

>    fb_ili9341.c (DRM driver in drivers/gpu/drm/tiny/mi0283qt.c ?)

Yes and for the fact there are two drivers for the same chip in the DRM.
Overall there are three different drivers for Ilitek 9341.

>    fb_ili9481.c
>    fb_ili9486.c (DRM driver in drivers/gpu/drm/tiny/ili9486.c)
>    fb_pcd8544.c
>    fb_ra8875.c
>    fb_s6d02a1.c
>    fb_s6d1121.c
>    fb_seps525.c
>    fb_sh1106.c
>    fb_ssd1289.c
>    fb_ssd1305.c
>    fb_ssd1306.c
>    fb_ssd1325.c
>    fb_ssd1331.c
>    fb_ssd1351.c
>    fb_st7735r.c (DRM driver in drivers/gpu/drm/tiny/st7735r.c)
>    fb_st7789v.c (DRM driver in drivers/gpu/drm/panel/panel-sitronix-st7789v.c)
>    fb_tinylcd.c
>    fb_tls8204.c
>    fb_uc1611.c
>    fb_uc1701.c
>    fb_upd161704.c
>    fb_watterott.c

-- 
With Best Regards,
Andy Shevchenko