Re: [PATCH v2 03/12] drm/sun4i: sun6i_mipi_dsi: Setup burst mode timings

From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Jagan Teki <jagan@amarulasolutions.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
	Rob Herring <robh+dt@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Icenowy Zheng <icenowy@aosc.io>,
	Jernej Skrabec <jernej.skrabec@siol.net>,
	Vasily Khoruzhick <anarsoul@gmail.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Mark Rutland <mark.rutland@arm.com>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	devicetree <devicetree@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Michael Trimarchi <michael@amarulasolutions.com>,
	TL Lim <tllim@pine64.org>,
	linux-sunxi@googlegroups.com, linux-amarula@amarulasolutions.com
Subject: Re: [PATCH v2 03/12] drm/sun4i: sun6i_mipi_dsi: Setup burst mode timings
Date: Tue, 27 Nov 2018 11:07:24 +0100	[thread overview]
Message-ID: <20181127100724.od5rm7vxdn7qemdv@flea> (raw)
In-Reply-To: <CAMty3ZCZtTa=YYxVnqvOHSGxA4vkXf6iinhoKfVN7B6CHFg_xQ@mail.gmail.com>

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On Tue, Nov 20, 2018 at 09:52:23PM +0530, Jagan Teki wrote:
> On Tue, Nov 20, 2018 at 9:15 PM Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> >
> > On Mon, Nov 19, 2018 at 04:30:37PM +0530, Jagan Teki wrote:
> > > On Mon, Nov 19, 2018 at 2:00 PM Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> > > >
> > > > On Fri, Nov 16, 2018 at 10:09:07PM +0530, Jagan Teki wrote:
> > > > > Burst mode display timings are different from convectional
> > > > > video mode so update the horizontal and vertical timings.
> > > > >
> > > > > Reference code taken from BSP (from linux-sunxi/
> > > > > drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
> > > > >
> > > > > dsi_hsa  = 0;
> > > > > dsi_hbp  = 0;
> > > > > dsi_hact = x*dsi_pixel_bits[format]/8;
> > > > > dsi_hblk = dsi_hact;
> > > > > dsi_hfp  = 0;
> > > > > dsi_vblk = 0;
> > > > >
> > > > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> > > >
> > > > How is that matching the code you have in the rest of your patch?
> > >
> > > +       if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> > > +               timings.hblk = (mode->hdisplay * Bpp);
> > > +       else
> > > +               sun6i_dsi_get_timings(dsi, mode, &timings);
> > >
> > > It's again your request to "keep the couple of function to make more
> > > readable"
> >
> > That function in particular doesn't make it much more readable, but
> > more importantly, your commit log doesn't match what you code does.
> 
> May be I can update the commit message if the function is OK. for
> burst most of the timings are 0 so I used structure with memset to
> keep not assigning 0's explicitly. otherwise do you have any
> suggestions, please let me know.

Drop the part that move the timings setup to another function in this
patch.

Thanks!
Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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