Re: [PATCH 06/15] drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

Sean Paul
2021-09-17T15:38:11Z

On Thu, Sep 16, 2021 at 11:15:43PM +0200, Fernando Ramos wrote:
> As requested in Documentation/gpu/todo.rst, replace driver calls to
> drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
> DRM_MODESET_LOCK_ALL_END()
>
> Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
> ---
> drivers/gpu/drm/tegra/dsi.c | 6 ++++--
> drivers/gpu/drm/tegra/hdmi.c | 5 +++--
> drivers/gpu/drm/tegra/sor.c | 10 ++++++----
> 3 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
> index f46d377f0c30..77a496f6a2e9 100644
> --- a/drivers/gpu/drm/tegra/dsi.c
> +++ b/drivers/gpu/drm/tegra/dsi.c
> @@ -202,10 +202,12 @@ static int tegra_dsi_show_regs(struct seq_file *s, void *data)
> struct tegra_dsi *dsi = node->info_ent->data;
> struct drm_crtc *crtc = dsi->output.encoder.crtc;
> struct drm_device *drm = node->minor->dev;
> + struct drm_modeset_acquire_ctx ctx;
> unsigned int i;
> int err = 0;
> + int ret;

You can use err here instead. With that fixed,

Reviewed-by: Sean Paul <sean@poorly.run>

>
> - drm_modeset_lock_all(drm);
> + DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, ret);
>
> if (!crtc || !crtc->state->active) {
> err = -EBUSY;
> @@ -220,7 +222,7 @@ static int tegra_dsi_show_regs(struct seq_file *s, void *data)
> }
>
> unlock:
> - drm_modeset_unlock_all(drm);
> + DRM_MODESET_LOCK_ALL_END(drm, ctx, ret);
> return err;
> }
>
> diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
> index e5d2a4026028..669a2ebb55ae 100644
> --- a/drivers/gpu/drm/tegra/hdmi.c
> +++ b/drivers/gpu/drm/tegra/hdmi.c
> @@ -1031,10 +1031,11 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data)
> struct tegra_hdmi *hdmi = node->info_ent->data;
> struct drm_crtc *crtc = hdmi->output.encoder.crtc;
> struct drm_device *drm = node->minor->dev;
> + struct drm_modeset_acquire_ctx ctx;
> unsigned int i;
> int err = 0;
>
> - drm_modeset_lock_all(drm);
> + DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
>
> if (!crtc || !crtc->state->active) {
> err = -EBUSY;
> @@ -1049,7 +1050,7 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data)
> }
>
> unlock:
> - drm_modeset_unlock_all(drm);
> + DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
> return err;
> }
>
> diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
> index 0ea320c1092b..323d95eb0cac 100644
> --- a/drivers/gpu/drm/tegra/sor.c
> +++ b/drivers/gpu/drm/tegra/sor.c
> @@ -1490,10 +1490,11 @@ static int tegra_sor_show_crc(struct seq_file *s, void *data)
> struct tegra_sor *sor = node->info_ent->data;
> struct drm_crtc *crtc = sor->output.encoder.crtc;
> struct drm_device *drm = node->minor->dev;
> + struct drm_modeset_acquire_ctx ctx;
> int err = 0;
> u32 value;
>
> - drm_modeset_lock_all(drm);
> + DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
>
> if (!crtc || !crtc->state->active) {
> err = -EBUSY;
> @@ -1522,7 +1523,7 @@ static int tegra_sor_show_crc(struct seq_file *s, void *data)
> seq_printf(s, "%08x\n", value);
>
> unlock:
> - drm_modeset_unlock_all(drm);
> + DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
> return err;
> }
>
> @@ -1652,10 +1653,11 @@ static int tegra_sor_show_regs(struct seq_file *s, void *data)
> struct tegra_sor *sor = node->info_ent->data;
> struct drm_crtc *crtc = sor->output.encoder.crtc;
> struct drm_device *drm = node->minor->dev;
> + struct drm_modeset_acquire_ctx ctx;
> unsigned int i;
> int err = 0;
>
> - drm_modeset_lock_all(drm);
> + DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
>
> if (!crtc || !crtc->state->active) {
> err = -EBUSY;
> @@ -1670,7 +1672,7 @@ static int tegra_sor_show_regs(struct seq_file *s, void *data)
> }
>
> unlock:
> - drm_modeset_unlock_all(drm);
> + DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
> return err;
> }
>
> --
> 2.33.0
>

--
Sean Paul, Software Engineer, Google / Chromium OS