diff mbox

[v4,01/38] drm/bridge: analogix_dp: set psr activate/deactivate when enable/disable bridge

Message ID 20180305222324.5872-2-enric.balletbo@collabora.com (mailing list archive)
State New, archived
Headers show

Commit Message

Enric Balletbo i Serra March 5, 2018, 10:22 p.m. UTC 
From: zain wang <wzz@rock-chips.com>

There's a race between when bridge_disable and when vop_crtc_disable
are called. If the flush timer triggers a new psr work between these,
we will operate eDP without power shutdowned by bridge_disable. In this
case, moving activate/deactivate to enable/disable bridge to avoid it.

Cc: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---

 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c |  7 +++++-
 drivers/gpu/drm/rockchip/rockchip_drm_psr.c     | 30 ++++++++++++++++++++-----
 drivers/gpu/drm/rockchip/rockchip_drm_psr.h     |  4 ++--
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c     |  4 ----
 4 files changed, 32 insertions(+), 13 deletions(-)

Comments

Heiko Stuebner March 8, 2018, 10:44 p.m. UTC | #1 
Am Montag, 5. März 2018, 23:22:53 CET schrieb Enric Balletbo i Serra:
> From: zain wang <wzz@rock-chips.com>
> 
> There's a race between when bridge_disable and when vop_crtc_disable
> are called. If the flush timer triggers a new psr work between these,
> we will operate eDP without power shutdowned by bridge_disable. In this
> case, moving activate/deactivate to enable/disable bridge to avoid it.
> 
> Cc: Stéphane Marchesin <marcheu@chromium.org>
> Signed-off-by: zain wang <wzz@rock-chips.com>
> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

adapted the subject to drm/rockchip, as it only touches the rockchip
glue driver for the analogix_dp and applied to drm-misc-next after
checking on both pinky (rk3288) and kevin (rk3399).


Heiko
diff mbox

Patch

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index eb88c52336a7..7d76ff47028d 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -150,12 +150,17 @@  static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
 		return ret;
 	}
 
-	return 0;
+	return rockchip_drm_psr_activate(&dp->encoder);
 }
 
 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
 {
 	struct rockchip_dp_device *dp = to_dp(plat_data);
+	int ret;
+
+	ret = rockchip_drm_psr_deactivate(&dp->encoder);
+	if (ret != 0)
+		return ret;
 
 	clk_disable_unprepare(dp->pclk);
 
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
index 3acfd576b7df..b3fb99c5b1fd 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
@@ -57,6 +57,24 @@  static struct psr_drv *find_psr_by_crtc(struct drm_crtc *crtc)
 	return psr;
 }
 
+static struct psr_drv *find_psr_by_encoder(struct drm_encoder *encoder)
+{
+	struct rockchip_drm_private *drm_drv = encoder->dev->dev_private;
+	struct psr_drv *psr;
+	unsigned long flags;
+
+	spin_lock_irqsave(&drm_drv->psr_list_lock, flags);
+	list_for_each_entry(psr, &drm_drv->psr_list, list) {
+		if (psr->encoder == encoder)
+			goto out;
+	}
+	psr = ERR_PTR(-ENODEV);
+
+out:
+	spin_unlock_irqrestore(&drm_drv->psr_list_lock, flags);
+	return psr;
+}
+
 static void psr_set_state_locked(struct psr_drv *psr, enum psr_state state)
 {
 	/*
@@ -115,14 +133,14 @@  static void psr_flush_handler(struct timer_list *t)
 
 /**
  * rockchip_drm_psr_activate - activate PSR on the given pipe
- * @crtc: CRTC to obtain the PSR encoder
+ * @encoder: encoder to obtain the PSR encoder
  *
  * Returns:
  * Zero on success, negative errno on failure.
  */
-int rockchip_drm_psr_activate(struct drm_crtc *crtc)
+int rockchip_drm_psr_activate(struct drm_encoder *encoder)
 {
-	struct psr_drv *psr = find_psr_by_crtc(crtc);
+	struct psr_drv *psr = find_psr_by_encoder(encoder);
 	unsigned long flags;
 
 	if (IS_ERR(psr))
@@ -138,14 +156,14 @@  EXPORT_SYMBOL(rockchip_drm_psr_activate);
 
 /**
  * rockchip_drm_psr_deactivate - deactivate PSR on the given pipe
- * @crtc: CRTC to obtain the PSR encoder
+ * @encoder: encoder to obtain the PSR encoder
  *
  * Returns:
  * Zero on success, negative errno on failure.
  */
-int rockchip_drm_psr_deactivate(struct drm_crtc *crtc)
+int rockchip_drm_psr_deactivate(struct drm_encoder *encoder)
 {
-	struct psr_drv *psr = find_psr_by_crtc(crtc);
+	struct psr_drv *psr = find_psr_by_encoder(encoder);
 	unsigned long flags;
 
 	if (IS_ERR(psr))
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
index b420cf1bf902..b1ea0155e57c 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
@@ -18,8 +18,8 @@ 
 void rockchip_drm_psr_flush_all(struct drm_device *dev);
 int rockchip_drm_psr_flush(struct drm_crtc *crtc);
 
-int rockchip_drm_psr_activate(struct drm_crtc *crtc);
-int rockchip_drm_psr_deactivate(struct drm_crtc *crtc);
+int rockchip_drm_psr_activate(struct drm_encoder *encoder);
+int rockchip_drm_psr_deactivate(struct drm_encoder *encoder);
 
 int rockchip_drm_psr_register(struct drm_encoder *encoder,
 			void (*psr_set)(struct drm_encoder *, bool enable));
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 9f72762532bf..63fbe789a5dd 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -569,8 +569,6 @@  static void vop_crtc_atomic_disable(struct drm_crtc *crtc,
 
 	WARN_ON(vop->event);
 
-	rockchip_drm_psr_deactivate(&vop->crtc);
-
 	drm_crtc_vblank_off(crtc);
 
 	/*
@@ -942,8 +940,6 @@  static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
 	clk_set_rate(vop->dclk, adjusted_mode->clock * 1000);
 
 	VOP_REG_SET(vop, common, standby, 0);
-
-	rockchip_drm_psr_activate(&vop->crtc);
 }
 
 static bool vop_fs_irq_is_pending(struct vop *vop)