linux-kernel - Re: [PATCH] drm/vc4: Update type of reg parameter in vc4_hdmi

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Date:   Fri, 11 Sep 2020 11:30:59 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Eric Anholt <eric@...olt.net>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] drm/vc4: Update type of reg parameter in
 vc4_hdmi_{read,write}

On Thu, Sep 10, 2020 at 10:04:02AM -0700, Nathan Chancellor wrote:
> Clang warns 100+ times in the vc4 driver along the lines of:
> 
> drivers/gpu/drm/vc4/vc4_hdmi_phy.c:518:13: warning: implicit conversion
> from enumeration type 'enum vc4_hdmi_field' to different enumeration
> type 'enum vc4_hdmi_regs' [-Wenum-conversion]
>         HDMI_WRITE(HDMI_TX_PHY_POWERDOWN_CTL,
>         ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> The HDMI_READ and HDMI_WRITE macros pass in enumerators of type
> vc4_hdmi_field but vc4_hdmi_write and vc4_hdmi_read expect a enumerator
> of type vc4_hdmi_regs, causing a warning for every instance of this.
> Update the parameter type so there is no more mismatch.
> 
> Fixes: 311e305fdb4e ("drm/vc4: hdmi: Implement a register layout abstraction")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1149
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Applied, thanks!
Maxime

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