From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Chen-Yu Tsai <wens@csie.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"David S . Miller" <davem@davemloft.net>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Walleij <linus.walleij@linaro.org>,
Randy Dunlap <rdunlap@infradead.org>,
Hans Verkuil <hans.verkuil@cisco.com>,
Arnd Bergmann <arnd@arndb.de>,
Stanimir Varbanov <stanimir.varbanov@linaro.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>,
Yannick Fertre <yannick.fertre@st.com>,
Thomas Gleixner <tglx@linutronix.de>,
Hugues Fruchet <hugues.fruchet@st.com>,
Alexandre Courbot <gnurou@gmail.com>,
Florent Revest <florent.revest@free-electrons.com>,
Tomasz Figa <tfiga@chromium.org>,
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>,
Smitha T Murthy <smitha.t@samsung.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Sylwester Nawrocki <s.nawrocki@samsung.com>,
Randy Li <ayaka@soulik.info>
Subject: Re: [PATCH v3 11/14] media: platform: Add Sunxi-Cedrus VPU decoder driver
Date: Thu, 14 Jun 2018 17:39:53 +0200 [thread overview]
Message-ID: <042923c4f378f3e134bf490d5f6a650173984411.camel@bootlin.com> (raw)
In-Reply-To: <20180507154201.4vz3y6j7u7kzfud6@flea>
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Hi,
On Mon, 2018-05-07 at 17:42 +0200, Maxime Ripard wrote:
> On Mon, May 07, 2018 at 02:44:57PM +0200, Paul Kocialkowski wrote:
> > +#define SYSCON_SRAM_CTRL_REG0 0x0
> > +#define SYSCON_SRAM_C1_MAP_VE 0x7fffffff
>
> This isn't needed anymore
Will do in the next revision.
> > + dev->ahb_clk = devm_clk_get(dev->dev, "ahb");
> > + if (IS_ERR(dev->ahb_clk)) {
> > + dev_err(dev->dev, "failed to get ahb clock\n");
> > + return PTR_ERR(dev->ahb_clk);
> > + }
> > + dev->mod_clk = devm_clk_get(dev->dev, "mod");
> > + if (IS_ERR(dev->mod_clk)) {
> > + dev_err(dev->dev, "failed to get mod clock\n");
> > + return PTR_ERR(dev->mod_clk);
> > + }
> > + dev->ram_clk = devm_clk_get(dev->dev, "ram");
> > + if (IS_ERR(dev->ram_clk)) {
> > + dev_err(dev->dev, "failed to get ram clock\n");
> > + return PTR_ERR(dev->ram_clk);
> > + }
>
> Please add some blank lines between those blocks
Yes, looks much better that way!
> > + dev->rstc = devm_reset_control_get(dev->dev, NULL);
>
> You're not checking the error code here
Good catch.
> > + dev->syscon = syscon_regmap_lookup_by_phandle(dev->dev->of_node,
> > + "syscon");
> > + if (IS_ERR(dev->syscon)) {
> > + dev->syscon = NULL;
> > + } else {
> > + regmap_write_bits(dev->syscon, SYSCON_SRAM_CTRL_REG0,
> > + SYSCON_SRAM_C1_MAP_VE,
> > + SYSCON_SRAM_C1_MAP_VE);
> > + }
>
> You don't need the syscon part anymore either
Correct.
> > + ret = clk_prepare_enable(dev->ahb_clk);
> > + if (ret) {
> > + dev_err(dev->dev, "could not enable ahb clock\n");
> > + return -EFAULT;
> > + }
> > + ret = clk_prepare_enable(dev->mod_clk);
> > + if (ret) {
> > + clk_disable_unprepare(dev->ahb_clk);
> > + dev_err(dev->dev, "could not enable mod clock\n");
> > + return -EFAULT;
> > + }
> > + ret = clk_prepare_enable(dev->ram_clk);
> > + if (ret) {
> > + clk_disable_unprepare(dev->mod_clk);
> > + clk_disable_unprepare(dev->ahb_clk);
> > + dev_err(dev->dev, "could not enable ram clock\n");
> > + return -EFAULT;
> > + }
> > +
> > + ret = reset_control_reset(dev->rstc);
> > + if (ret) {
> > + clk_disable_unprepare(dev->ram_clk);
> > + clk_disable_unprepare(dev->mod_clk);
> > + clk_disable_unprepare(dev->ahb_clk);
> > + dev_err(dev->dev, "could not reset device\n");
> > + return -EFAULT;
>
> labels would simplify this greatly, and you should also release the
> sram and the memory region here.
I'll definitely do a sweep and add labels/gotos for this before
submitting the nexr revision.
Thanks for the review!
Cheers,
Paul
--
Paul Kocialkowski, Bootlin (formerly Free Electrons)
Embedded Linux and kernel engineering
https://bootlin.com
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next prev parent reply other threads:[~2018-06-14 15:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-07 12:44 [PATCH v3 00/14] Sunxi-Cedrus driver for the Allwinner Video Engine, using media requests Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 01/14] drivers: soc: sunxi: Add support for the C1 SRAM region Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 02/14] drivers: soc: sunxi: Add dedicated compatibles for the A13, A20 and A33 Paul Kocialkowski
2018-05-11 5:05 ` Chen-Yu Tsai
2018-05-11 10:20 ` Maxime Ripard
2018-06-14 13:02 ` Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 03/14] ARM: dts: sun5i: Use dedicated SRAM controller compatible Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 04/14] ARM: dts: sun7i-a20: " Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 05/14] ARM: sun5i: Add support for the C1 SRAM region with the SRAM controller Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 06/14] ARM: sun7i-a20: " Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 07/14] ARM: sun8i-a33: Add SRAM controller node and C1 SRAM region Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 08/14] media: v4l: Add definitions for MPEG2 frame format and header metadata Paul Kocialkowski
2018-05-07 13:49 ` Hans Verkuil
2018-05-07 13:52 ` Paul Kocialkowski
2018-05-17 4:00 ` kbuild test robot
2018-05-07 12:44 ` [PATCH v3 09/14] media: v4l: Add definition for Allwinner's MB32-tiled NV12 format Paul Kocialkowski
2018-05-07 13:50 ` Hans Verkuil
2018-05-07 12:44 ` [PATCH v3 10/14] dt-bindings: media: Document bindings for the Sunxi-Cedrus VPU driver Paul Kocialkowski
2018-05-07 14:18 ` Rob Herring
2018-05-07 12:44 ` [PATCH v3 11/14] media: platform: Add Sunxi-Cedrus VPU decoder driver Paul Kocialkowski
2018-05-07 14:02 ` Hans Verkuil
2018-06-14 15:47 ` Paul Kocialkowski
2018-05-07 15:42 ` Maxime Ripard
2018-06-14 15:39 ` Paul Kocialkowski [this message]
2018-05-07 18:03 ` kbuild test robot
2018-05-07 12:44 ` [PATCH v3 12/14] ARM: dts: sun5i: Add Video Engine and reserved memory nodes Paul Kocialkowski
2018-05-07 12:44 ` [PATCH v3 13/14] ARM: dts: sun7i-a20: " Paul Kocialkowski
2018-05-07 12:45 ` [PATCH v3 14/14] ARM: dts: sun8i-a33: " Paul Kocialkowski
2018-05-07 14:50 ` [PATCH v3 00/14] Sunxi-Cedrus driver for the Allwinner Video Engine, using media requests Paul Kocialkowski
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