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[209.85.128.49]) by smtp.gmail.com with ESMTPSA id k4-v6sm3030106ejz.67.2018.10.08.06.11.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 08 Oct 2018 06:11:08 -0700 (PDT) Received: by mail-wm1-f49.google.com with SMTP id y11-v6so5136085wma.3; Mon, 08 Oct 2018 06:11:07 -0700 (PDT) X-Received: by 2002:a1c:e717:: with SMTP id e23-v6mr4555462wmh.145.1539004267255; Mon, 08 Oct 2018 06:11:07 -0700 (PDT) MIME-Version: 1.0 References: <20181007093905.11253-1-jernej.skrabec@siol.net> <20181007093905.11253-26-jernej.skrabec@siol.net> <20181008085112.mejpwvl3dpu7sopy@flea> <20181008102021.ox34mqbw65euvsb4@flea> <20181008123313.sxqzulfuktslchhy@flea> In-Reply-To: <20181008123313.sxqzulfuktslchhy@flea> From: Chen-Yu Tsai Date: Mon, 8 Oct 2018 21:10:54 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 25/29] drm: sun4i: add quirks for TCON TOP To: Maxime Ripard Cc: Jernej Skrabec , Rob Herring , Stephen Boyd , David Airlie , Archit Taneja , Andrzej Hajda , Laurent Pinchart , devicetree , linux-arm-kernel , linux-kernel , linux-clk , dri-devel , linux-sunxi , Icenowy Zheng Content-Type: text/plain; charset="UTF-8" Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org On Mon, Oct 8, 2018 at 8:33 PM Maxime Ripard wrote: > > On Mon, Oct 08, 2018 at 06:50:44PM +0800, Chen-Yu Tsai wrote: > > On Mon, Oct 8, 2018 at 6:20 PM Maxime Ripard wrote: > > > > > > On Mon, Oct 08, 2018 at 05:06:45PM +0800, Chen-Yu Tsai wrote: > > > > On Mon, Oct 8, 2018 at 4:51 PM Maxime Ripard wrote: > > > > > > > > > > On Sun, Oct 07, 2018 at 11:39:01AM +0200, Jernej Skrabec wrote: > > > > > > From: Icenowy Zheng > > > > > > > > > > > > Some SoCs, such as H6, doesn't have a full-featured TCON TOP. > > > > > > > > > > > > Add quirks support for TCON TOP. > > > > > > > > > > > > Currently the presence of TCON_TV1 and DSI is controlled via the quirks > > > > > > structure. > > > > > > > > > > > > Signed-off-by: Icenowy Zheng > > > > > > --- > > > > > > drivers/gpu/drm/sun4i/sun8i_tcon_top.c | 43 ++++++++++++++++++++------ > > > > > > 1 file changed, 34 insertions(+), 9 deletions(-) > > > > > > > > > > > > diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c > > > > > > index 37158548b447..ed13233cad88 100644 > > > > > > --- a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c > > > > > > +++ b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c > > > > > > @@ -9,11 +9,17 @@ > > > > > > #include > > > > > > #include > > > > > > #include > > > > > > +#include > > > > > > #include > > > > > > #include > > > > > > > > > > > > #include "sun8i_tcon_top.h" > > > > > > > > > > > > +struct sun8i_tcon_top_quirks { > > > > > > + bool has_tcon_tv1; > > > > > > + bool has_dsi; > > > > > > +}; > > > > > > + > > > > > > static bool sun8i_tcon_top_node_is_tcon_top(struct device_node *node) > > > > > > { > > > > > > return !!of_match_node(sun8i_tcon_top_of_table, node); > > > > > > @@ -121,10 +127,13 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, > > > > > > struct platform_device *pdev = to_platform_device(dev); > > > > > > struct clk_hw_onecell_data *clk_data; > > > > > > struct sun8i_tcon_top *tcon_top; > > > > > > + const struct sun8i_tcon_top_quirks *quirks; > > > > > > struct resource *res; > > > > > > void __iomem *regs; > > > > > > int ret, i; > > > > > > > > > > > > + quirks = of_device_get_match_data(&pdev->dev); > > > > > > + > > > > > > tcon_top = devm_kzalloc(dev, sizeof(*tcon_top), GFP_KERNEL); > > > > > > if (!tcon_top) > > > > > > return -ENOMEM; > > > > > > @@ -187,15 +196,23 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, > > > > > > &tcon_top->reg_lock, > > > > > > TCON_TOP_TCON_TV0_GATE, 0); > > > > > > > > > > > > - clk_data->hws[CLK_TCON_TOP_TV1] = > > > > > > - sun8i_tcon_top_register_gate(dev, "tcon-tv1", regs, > > > > > > - &tcon_top->reg_lock, > > > > > > - TCON_TOP_TCON_TV1_GATE, 1); > > > > > > + if (quirks->has_tcon_tv1) { > > > > > > + clk_data->hws[CLK_TCON_TOP_TV1] = > > > > > > + sun8i_tcon_top_register_gate(dev, "tcon-tv1", regs, > > > > > > + &tcon_top->reg_lock, > > > > > > + TCON_TOP_TCON_TV1_GATE, 1); > > > > > > + } else { > > > > > > + clk_data->hws[CLK_TCON_TOP_TV1] = NULL; > > > > > > + } > > > > > > > > > > > > - clk_data->hws[CLK_TCON_TOP_DSI] = > > > > > > - sun8i_tcon_top_register_gate(dev, "dsi", regs, > > > > > > - &tcon_top->reg_lock, > > > > > > - TCON_TOP_TCON_DSI_GATE, 2); > > > > > > + if (quirks->has_dsi) { > > > > > > + clk_data->hws[CLK_TCON_TOP_DSI] = > > > > > > + sun8i_tcon_top_register_gate(dev, "dsi", regs, > > > > > > + &tcon_top->reg_lock, > > > > > > + TCON_TOP_TCON_DSI_GATE, 2); > > > > > > + } else { > > > > > > + clk_data->hws[CLK_TCON_TOP_DSI] = NULL; > > > > > > > > > > clk_data has been kzalloc'd so its content is already NULL. > > > > > > > > > > And you shouldn't have brackets for single line blocks. > > > > > > > > > > with that fixed, > > > > > > > > FYI checkpatch.pl complains if you use brackets for the if block > > > > but not for the else block. They should be matching. > > > > > > Checkpatch might not warn on this, but > > > https://www.kernel.org/doc/Documentation/process/coding-style.rst, > > > section 3 is pretty clear on whether we should use them or not. > > > > Right. What I'm pointing out what checkpatch.pl complains about is > > shown in the second last example in section 3: > > > > This does not apply if only one branch of a conditional statement > > is a single > > statement; in the latter case use braces in both branches: > > > > Which is where I think your comment on "shouldn't have brackets for > > single line blocks" > > is pointing in the opposite direction. > > I think we have a communication failure :) > > The two blocks above are single line blocks, even though the line is > wrapped. So whether or not there is an else condition or not doesn't > matter, you shouldn't have braces at all. Ah... It was a single line split wrapped to two lines... Sorry for the noise. ChenYu