drm/rockchip: analogix_dp: set psr activate/deactivate when enable/disable bridge

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>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20180305222324.5872-2-enric.balletbo@collabora.com

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index eb88c52..7d76ff4 100644 (file)
--- 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 3acfd57..b3fb99c 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
@@ -57,6 +57,24 @@ out:
        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 b420cf1..b1ea015 100644 (file)
--- 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 998e65d..158e79e 100644 (file)
--- 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);
 
        /*
@@ -937,8 +935,6 @@ 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)