linux-kernel - Re: [PATCH v4 3/3] drm/msm/dp: replace DRM_DEBUG_DP marco with drm_dbg

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Date:   Thu, 17 Feb 2022 12:01:26 -0800
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     Stephen Boyd <swboyd@...omium.org>, <agross@...nel.org>,
        <airlied@...ux.ie>, <bjorn.andersson@...aro.org>,
        <daniel@...ll.ch>, <dmitry.baryshkov@...aro.org>,
        <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <vkoul@...nel.org>
CC:     <quic_abhinavk@...cinc.com>, <quic_aravindh@...cinc.com>,
        <quic_sbillaka@...cinc.com>, <freedreno@...ts.freedesktop.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3/3] drm/msm/dp: replace DRM_DEBUG_DP marco with
 drm_dbg_dp


On 2/17/2022 11:36 AM, Stephen Boyd wrote:
> Quoting Kuogee Hsieh (2022-02-17 10:35:30)
>> Since DRM_DEBUG_DP is deprecated in favor of drm_dbg_dp(NULL, ...),
>> this patch replace all DRM_DEBUG_DP with drm_dbg_dp().
>>
>> Changes in v4:
>> -- replace (strucr drm_dev *)NULL with drm_dev
> Why can't the platform device be used?
#define drm_dbg_dp(drm, fmt, ...)                                       \

         drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DP, fmt, 
##__VA_ARGS__)

it looks for (drm)->dev (pointer)

struct platform_device {
         const char      *name;
         int             id;
         bool            id_auto;
         struct device   dev          <== not an pointer here