From: Bjorn Andersson <bjorn.andersson@linaro.org> To: Rob Clark <robdclark@gmail.com>, Abhinav Kumar <quic_abhinavk@quicinc.com>, Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Cc: Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] drm/msm/dp: Only create debugfs for PRIMARY minor Date: Thu, 16 Dec 2021 16:20:26 -0800 [thread overview] Message-ID: <20211217002026.2304973-1-bjorn.andersson@linaro.org> (raw) dpu_kms_debugfs_init() is invoked for each minor being registered. Most of the files created are unrelated to the minor, so there's no reason to present them per minor. The exception to this is the DisplayPort code, which ends up invoking dp_debug_get() for each minor, each time associate the allocated object with dp->debug. As such dp_debug will create debugfs files in both the PRIMARY and the RENDER minor's debugfs directory, but only the last reference will be remembered. The only use of this reference today is in the cleanup path in dp_display_deinit_sub_modules() and the dp_debug_private object does outlive the debugfs entries in either case, so there doesn't seem to be any adverse effects of this, but per the code the current behavior is unexpected, so change it to only create debugfs files for the PRIMARY minor. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- Changes since v1: - Moved the check up from msm_dp_debugfs_init() to dpu_kms_debugfs_init() drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 2ee70072a1b4..a54f7d373f14 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -193,6 +193,10 @@ static int dpu_kms_debugfs_init(struct msm_kms *kms, struct drm_minor *minor) if (!p) return -EINVAL; + /* Only create one set of debugfs per DP instance */ + if (minor->type != DRM_MINOR_PRIMARY) + return 0; + dev = dpu_kms->dev; priv = dev->dev_private; -- 2.33.1
WARNING: multiple messages have this Message-ID (diff)
From: Bjorn Andersson <bjorn.andersson@linaro.org> To: Rob Clark <robdclark@gmail.com>, Abhinav Kumar <quic_abhinavk@quicinc.com>, Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Cc: Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Subject: [PATCH v2] drm/msm/dp: Only create debugfs for PRIMARY minor Date: Thu, 16 Dec 2021 16:20:26 -0800 [thread overview] Message-ID: <20211217002026.2304973-1-bjorn.andersson@linaro.org> (raw) dpu_kms_debugfs_init() is invoked for each minor being registered. Most of the files created are unrelated to the minor, so there's no reason to present them per minor. The exception to this is the DisplayPort code, which ends up invoking dp_debug_get() for each minor, each time associate the allocated object with dp->debug. As such dp_debug will create debugfs files in both the PRIMARY and the RENDER minor's debugfs directory, but only the last reference will be remembered. The only use of this reference today is in the cleanup path in dp_display_deinit_sub_modules() and the dp_debug_private object does outlive the debugfs entries in either case, so there doesn't seem to be any adverse effects of this, but per the code the current behavior is unexpected, so change it to only create debugfs files for the PRIMARY minor. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- Changes since v1: - Moved the check up from msm_dp_debugfs_init() to dpu_kms_debugfs_init() drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 2ee70072a1b4..a54f7d373f14 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -193,6 +193,10 @@ static int dpu_kms_debugfs_init(struct msm_kms *kms, struct drm_minor *minor) if (!p) return -EINVAL; + /* Only create one set of debugfs per DP instance */ + if (minor->type != DRM_MINOR_PRIMARY) + return 0; + dev = dpu_kms->dev; priv = dev->dev_private; -- 2.33.1
next reply other threads:[~2021-12-17 0:19 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-12-17 0:20 Bjorn Andersson [this message] 2021-12-17 0:20 ` [PATCH v2] drm/msm/dp: Only create debugfs for PRIMARY minor Bjorn Andersson 2021-12-20 19:51 ` Abhinav Kumar 2021-12-20 19:51 ` Abhinav Kumar 2021-12-20 23:53 ` Dmitry Baryshkov 2021-12-20 23:53 ` Dmitry Baryshkov 2021-12-21 0:02 ` Bjorn Andersson 2021-12-21 0:02 ` Bjorn Andersson
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