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From: Mark Brown <broonie@kernel.org>
To: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Cc: a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com,
	airlied@linux.ie, daniel@ffwll.ch, robdclark@gmail.com,
	bjorn.andersson@linaro.org, dri-devel@lists.freedesktop.org,
	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] regmap: Add DSI bus support
Date: Sat, 6 Jul 2019 02:06:04 +0100
Message-ID: <20190706010604.GG20625@sirena.org.uk> (raw)
In-Reply-To: <20190703214512.41319-1-jeffrey.l.hugo@gmail.com>

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On Wed, Jul 03, 2019 at 02:45:12PM -0700, Jeffrey Hugo wrote:
> Add basic support with a simple implementation that utilizes the generic
> read/write commands to allow device registers to be configured.

This looks good to me but I really don't know anything about DSI,
I'd appreciate some review from other people who do.  I take it
there's some spec thing in DSI that says registers and bytes must
both be 8 bit?

A couple of minor comments, no need to resend just for these:

> +       payload[0] = (char)reg;
> +       payload[1] = (char)val;

Do you need the casts?

> +	ret = mipi_dsi_generic_write(dsi, payload, 2);
> +	return ret < 0 ? ret : 0;

Please just write an if statement, it helps with legibility.

> +struct regmap *__regmap_init_dsi(struct mipi_dsi_device *dsi,
> +				 const struct regmap_config *config,
> +				 struct lock_class_key *lock_key,
> +				 const char *lock_name)
> +{
> +	return __regmap_init(&dsi->dev, &dsi_bus, &dsi->dev, config,
> +			     lock_key, lock_name);
> +}
> +EXPORT_SYMBOL_GPL(__regmap_init_dsi);

Perhaps validate that the config is OK (mainly the register/value
sizes)?  Though I'm not sure it's worth it so perhaps not - up to
you.

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  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-03 21:43 [PATCH 0/2] ti-sn65dsi86 DSI configuration support Jeffrey Hugo
2019-07-03 21:45 ` [PATCH 1/2] regmap: Add DSI bus support Jeffrey Hugo
2019-07-06  1:06   ` Mark Brown [this message]
2019-07-10 18:08     ` Jeffrey Hugo
2019-07-11 14:41       ` Mark Brown
2019-07-11 13:11     ` Andrzej Hajda
2019-07-11 13:56       ` Rob Clark
2019-07-12 13:01         ` Andrzej Hajda
2019-07-12 14:22           ` Jeffrey Hugo
2019-07-13  0:49             ` Rob Clark
2019-07-11 14:50       ` Mark Brown
2019-07-15  8:38         ` Andrzej Hajda
2019-07-03 21:45 ` [PATCH 2/2] drm/bridge: ti-sn65dsi86: Add support to be a DSI device Jeffrey Hugo

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