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Date: Mon, 23 Sep 2019 07:24:26 +0000
From: "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To: "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
CC: Liviu Dudau <Liviu.Dudau@....com>,
"maarten.lankhorst@...ux.intel.com"
<maarten.lankhorst@...ux.intel.com>,
"seanpaul@...omium.org" <seanpaul@...omium.org>,
"airlied@...ux.ie" <airlied@...ux.ie>,
"daniel@...ll.ch" <daniel@...ll.ch>,
Brian Starkey <Brian.Starkey@....com>,
"linux-renesas-soc@...r.kernel.org"
<linux-renesas-soc@...r.kernel.org>, nd <nd@....com>,
"maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
"Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
"Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
"kieran.bingham+renesas@...asonboard.com"
<kieran.bingham+renesas@...asonboard.com>,
"laurent.pinchart@...asonboard.com"
<laurent.pinchart@...asonboard.com>,
Ayan Halder <Ayan.Halder@....com>,
"sean@...rly.run" <sean@...rly.run>
Subject: Re: [v1,1/2] drm: Free the writeback_job when it with an empty fb
On Wed, Jul 31, 2019 at 11:04:38AM +0000, Lowry Li (Arm Technology China) wrote:
> From: "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
>
> Adds the check if the writeback_job with an empty fb, then it should
> be freed in atomic_check phase.
>
> With this change, the driver users will not check empty fb case any more.
> So refined accordingly.
>
> Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@....com>
> Reviewed-by: Liviu Dudau <liviu.dudau@....com>
Looks good to me.
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>
And will push it to drm-misc-fixes
James
> ---
> drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c | 3 +--
> drivers/gpu/drm/arm/malidp_mw.c | 4 ++--
> drivers/gpu/drm/drm_atomic.c | 13 +++++++++----
> drivers/gpu/drm/rcar-du/rcar_du_writeback.c | 4 ++--
> drivers/gpu/drm/vc4/vc4_txp.c | 5 ++---
> 5 files changed, 16 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> index 617e1f7..d6103dd 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> @@ -43,9 +43,8 @@
> struct komeda_data_flow_cfg dflow;
> int err;
>
> - if (!writeback_job || !writeback_job->fb) {
> + if (!writeback_job)
> return 0;
> - }
>
> if (!crtc_st->active) {
> DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n");
> diff --git a/drivers/gpu/drm/arm/malidp_mw.c b/drivers/gpu/drm/arm/malidp_mw.c
> index 2e81252..a59227b 100644
> --- a/drivers/gpu/drm/arm/malidp_mw.c
> +++ b/drivers/gpu/drm/arm/malidp_mw.c
> @@ -130,7 +130,7 @@ static void malidp_mw_connector_destroy(struct drm_connector *connector)
> struct drm_framebuffer *fb;
> int i, n_planes;
>
> - if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
> + if (!conn_state->writeback_job)
> return 0;
>
> fb = conn_state->writeback_job->fb;
> @@ -247,7 +247,7 @@ void malidp_mw_atomic_commit(struct drm_device *drm,
>
> mw_state = to_mw_state(conn_state);
>
> - if (conn_state->writeback_job && conn_state->writeback_job->fb) {
> + if (conn_state->writeback_job) {
> struct drm_framebuffer *fb = conn_state->writeback_job->fb;
>
> DRM_DEV_DEBUG_DRIVER(drm->dev,
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index 419381a..14aeaf7 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -430,10 +430,15 @@ static int drm_atomic_connector_check(struct drm_connector *connector,
> return -EINVAL;
> }
>
> - if (writeback_job->out_fence && !writeback_job->fb) {
> - DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
> - connector->base.id, connector->name);
> - return -EINVAL;
> + if (!writeback_job->fb) {
> + if (writeback_job->out_fence) {
> + DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
> + connector->base.id, connector->name);
> + return -EINVAL;
> + }
> +
> + drm_writeback_cleanup_job(writeback_job);
> + state->writeback_job = NULL;
> }
>
> return 0;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_writeback.c b/drivers/gpu/drm/rcar-du/rcar_du_writeback.c
> index ae07290..04efa78d 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_writeback.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_writeback.c
> @@ -147,7 +147,7 @@ static int rcar_du_wb_enc_atomic_check(struct drm_encoder *encoder,
> struct drm_device *dev = encoder->dev;
> struct drm_framebuffer *fb;
>
> - if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
> + if (!conn_state->writeback_job)
> return 0;
>
> fb = conn_state->writeback_job->fb;
> @@ -221,7 +221,7 @@ void rcar_du_writeback_setup(struct rcar_du_crtc *rcrtc,
> unsigned int i;
>
> state = rcrtc->writeback.base.state;
> - if (!state || !state->writeback_job || !state->writeback_job->fb)
> + if (!state || !state->writeback_job)
> return;
>
> fb = state->writeback_job->fb;
> diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
> index 96f91c1..e92fa12 100644
> --- a/drivers/gpu/drm/vc4/vc4_txp.c
> +++ b/drivers/gpu/drm/vc4/vc4_txp.c
> @@ -229,7 +229,7 @@ static int vc4_txp_connector_atomic_check(struct drm_connector *conn,
> int i;
>
> conn_state = drm_atomic_get_new_connector_state(state, conn);
> - if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
> + if (!conn_state->writeback_job)
> return 0;
>
> crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
> @@ -269,8 +269,7 @@ static void vc4_txp_connector_atomic_commit(struct drm_connector *conn,
> u32 ctrl;
> int i;
>
> - if (WARN_ON(!conn_state->writeback_job ||
> - !conn_state->writeback_job->fb))
> + if (WARN_ON(!conn_state->writeback_job))
> return;
>
> mode = &conn_state->crtc->state->adjusted_mode;
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