[PATCH v7 05/15] drm/exynos: add Exynos5433 decon driver

[Inki Dae]

On 2015년 06월 22일 20:41, Varka Bhadram wrote:
> Hi,
> 
> On 06/22/2015 04:46 PM, Inki Dae wrote:
> 
>> From: Joonyoung Shim <jy0922.shim at samsung.com>
>>
>> DECON(Display and Enhancement Controller) is new IP replacing FIMD in
>> Exynos5433. This patch adds Exynos5433 decon driver.
>>
>> Changelog v7:
>> - Rebased on top of exynos-drm-next.
>> - Added runtime pm support.
>>
>> Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
>> Signed-off-by: Hyungwon Hwang <human.hwang at samsung.com>
>> Signed-off-by: Inki Dae <inki.dae at samsung.com>
>> ---
>>   
> 
> (...)
> 
>> +static int exynos5433_decon_probe(struct platform_device *pdev)
>> +{
>> +    struct device *dev = &pdev->dev;
>> +    struct decon_context *ctx;
>> +    struct resource *res;
>> +    int ret;
>> +    int i;
>> +
>> +    ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
>> +    if (!ctx)
>> +        return -ENOMEM;
>> +
>> +    ctx->default_win = 0;
>> +    ctx->suspended = true;
>> +    ctx->dev = dev;
>> +    if (of_get_child_by_name(dev->of_node, "i80-if-timings"))
>> +        ctx->i80_if = true;
>> +
>> +    for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
>> +        struct clk *clk;
>> +
>> +        clk = devm_clk_get(ctx->dev, decon_clks_name[i]);
>> +        if (IS_ERR(clk))
>> +            return PTR_ERR(clk);
>> +
>> +        ctx->clks[i] = clk;
>> +    }
>> +
>> +    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +    if (!res) {
>> +        dev_err(dev, "cannot find IO resource\n");
>> +        return -ENXIO;
>> +    }
>> +
> 
> You people promised me to remove this check  :-)

Right but isn't it better to check an error explicitly? Anyway trivial one.

> 
> http://lists.freedesktop.org/archives/dri-devel/2015-April/081077.html
> 
>> +    ctx->addr = devm_ioremap_resource(dev, res);
>> +    if (IS_ERR(ctx->addr)) {
>> +        dev_err(dev, "ioremap failed\n");
>> +        return PTR_ERR(ctx->addr);
>> +    }
>> +
>> +    res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
>> +            ctx->i80_if ? "lcd_sys" : "vsync");
>> +    if (!res) {
>> +        dev_err(dev, "cannot find IRQ resource\n");
>> +        return -ENXIO;
>> +    }
>> +
>> +    ret = devm_request_irq(dev, res->start, ctx->i80_if ?
>> +            decon_lcd_sys_irq_handler : decon_vsync_irq_handler, 0,
>> +            "drm_decon", ctx);
>> +    if (ret < 0) {
>> +        dev_err(dev, "lcd_sys irq request failed\n");
>> +        return ret;
>> +    }
>> +
>> +    platform_set_drvdata(pdev, ctx);
> 
> You are setting the driver data as ctx..
> 
> But no where you are using it...?
> 
> Am i missing anything ?

See decon_bind and decon_unbind functions. :)

Thanks,
Inki Dae

>