From: Maxime Ripard <maxime.ripard@bootlin.com>
To: "Jernej Škrabec" <jernej.skrabec@siol.net>
Cc: wens@csie.org, robh+dt@kernel.org, sboyd@kernel.org,
airlied@linux.ie, architt@codeaurora.org, a.hajda@samsung.com,
Laurent.pinchart@ideasonboard.com, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-sunxi@googlegroups.com
Subject: Re: [PATCH v2 10/29] drm/sun4i: Rename DE2 registers related macros
Date: Tue, 9 Oct 2018 17:53:48 +0200 [thread overview]
Message-ID: <20181009155348.exmeyvvelxwnv3b5@flea> (raw)
In-Reply-To: <11072788.dZi9MDiihb@jernej-laptop>
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On Mon, Oct 08, 2018 at 04:28:41PM +0200, Jernej Škrabec wrote:
> Dne ponedeljek, 08. oktober 2018 ob 12:18:28 CEST je Maxime Ripard napisal(a):
> > Hi,
> >
> > On Sun, Oct 07, 2018 at 11:38:46AM +0200, Jernej Skrabec wrote:
> > > In preparation to introduce DE3 support, change prefix from "SUN8I_" to
> > > "DE2_". Current prefix suggest that it's valid only for one family,
> > > whereas in reality, DE2 unit is used also on sun50i family.
> > > Additionally, it will be easier to distinguish DE3 specific macros by
> > > using "DE3_" prefix.
> > >
> > > No functional change in this commit.
> >
> > I'm not too sure about this one. There's basically two ways to look at
> > this: you described the first one, and the second one would be to
> > treat it as we do for the compatibles: the IP was introduced on one
> > SoC family, and then got used on some other ones.
> >
> > Trying to always match the one you have however have a quite big
> > maintainance cost, as can be shown by your patch: you always have to
> > adapt comments, function names, defines, etc. This creates a lot of
> > useless churns (ie, non-functional changes) in the drivers, that need
> > to be written in the first place, and then reviewed.
> >
> > It's just not worth it.
>
> Well, using family neutral way would mean that there is no need
> anymore for adaptation in the future, but as you wish.
If you consider only the DE case, where it has been numbered by
design, yes. If you consider all the other controllers that haven't
been (like, SPI, or the USB PHY, for example), then you end up with
two drivers that are using the same names, with no easy way to tell
which is which
> What prefix should I use for DE3 specific registers?
We should just follow the same pattern, and use the first family where
it was introduced. So sun50i, I guess?
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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next prev parent reply other threads:[~2018-10-09 15:54 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-07 9:38 [PATCH v2 00/29] Allwinner H6 DE3 and HDMI support Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 01/29] dt-bindings: bus: add H6 DE3 bus binding Jernej Skrabec
2018-10-08 8:31 ` Maxime Ripard
2018-10-08 14:25 ` Jernej Škrabec
2018-10-07 9:38 ` [PATCH v2 02/29] clk: sunxi-ng: Adjust MP clock parent rate when allowed Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 03/29] clk: sunxi-ng: Use u64 for calculation of NM rate Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 04/29] clk: sunxi-ng: h6: Set video PLLs limits Jernej Skrabec
2018-10-12 8:13 ` [linux-sunxi] " Jagan Teki
2018-10-12 9:03 ` Chen-Yu Tsai
2018-10-07 9:38 ` [PATCH v2 05/29] dt-bindings: clock: sun8i-de2: Add H6 DE3 clock description Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 06/29] clk: sunxi-ng: Add support for H6 DE3 clocks Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 07/29] dt-bindings: display: sun4i-drm: Add H6 display engine compatibles Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 08/29] drm/sun4i: Add compatible for H6 display engine Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 09/29] drm/sun4i: Rework DE2 register defines Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 10/29] drm/sun4i: Rename DE2 registers related macros Jernej Skrabec
2018-10-08 10:18 ` Maxime Ripard
2018-10-08 14:28 ` Jernej Škrabec
2018-10-09 15:53 ` Maxime Ripard [this message]
2018-10-07 9:38 ` [PATCH v2 11/29] drm/sun4i: Fix DE2 mixer size Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 12/29] drm/sun4i: Disable unused DE2 sub-engines Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 13/29] drm/sun4i: Add basic support for DE3 Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 14/29] drm/sun4i: Add support for H6 DE3 mixer 0 Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 15/29] drm/bridge/synopsys: dw-hdmi: Enable workaround for v2.12a Jernej Skrabec
2018-10-09 17:40 ` Laurent Pinchart
2018-10-09 17:56 ` Ilia Mirkin
2018-10-09 21:23 ` Russell King - ARM Linux
2018-10-15 17:43 ` [linux-sunxi] " Jernej Škrabec
2018-10-07 9:38 ` [PATCH v2 16/29] drm/sun4i: Not all DW HDMI controllers has scrambled addresses Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 17/29] drm/sun4i: dw-hdmi: Make mode_valid function configurable Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 18/29] drm/sun4i: dw-hdmi: Add quirk for setting TMDS clock Jernej Skrabec
2018-10-08 9:14 ` Maxime Ripard
2018-10-08 15:09 ` Jernej Škrabec
2018-10-09 9:14 ` Maxime Ripard
2018-10-07 9:38 ` [PATCH v2 19/29] dt-bindings: display: sunxi: add DT binding for Allwinner H6 DW HDMI Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 20/29] drm/sun4i: Add support for H6 DW HDMI controller Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 21/29] drm/sun4i: dw-hdmi-phy: Reorder quirks by family Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 22/29] drm/sun4i: Add support for Synopsys HDMI PHY Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 23/29] drm/sun4i: Add support for H6 " Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 24/29] drm/sun4i: Initialize registers in tcon-top driver Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 25/29] drm: sun4i: add quirks for TCON TOP Jernej Skrabec
2018-10-08 8:51 ` Maxime Ripard
2018-10-08 9:06 ` Chen-Yu Tsai
2018-10-08 10:20 ` Maxime Ripard
2018-10-08 10:50 ` Chen-Yu Tsai
2018-10-08 12:33 ` Maxime Ripard
2018-10-08 13:10 ` Chen-Yu Tsai
2018-10-08 14:30 ` Jernej Škrabec
2018-10-07 9:39 ` [PATCH v2 26/29] dt-bindings: display: sun4i-drm: document H6 " Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 27/29] drm: sun4i: add support for " Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 28/29] arm64: dts: allwinner: h6: Add HDMI pipeline Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 29/29] arm64: dts: allwinner: h6: Enable HDMI output on Pine H64 board Jernej Skrabec
2018-10-07 9:50 ` [linux-sunxi] [PATCH v2 00/29] Allwinner H6 DE3 and HDMI support Jernej Škrabec
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