[PATCH v3 0/6] Misc changes to Rockchip PSR drivers

[PATCH v3 0/6] Misc changes to Rockchip PSR drivers

[Zain Wang]

This serise of patches works for saving power on eDP PHY and VOP during PSR.

BR,
- Zain

Changes in v3:
- add new patch to support fast link training.
- add new patch to make VOP standby when entry PSR.
- Misc changes.

Changes in v2:
- add spin_lock to protect dpms_mode
- misc changes.

Yakir Yang (1):
  drm/bridge: analogix_dp: detect Sink PSR state after configuring the
    PSR

zain wang (5):
  drm/bridge: analogix_dp: set psr activate/deactivate when
    enable/disable bridge
  drm/bridge: remove dp init from analogix_dp_bind
  drm: bridge/analogix: switch Main-link and eDP PHY when enable/disable
    psr
  drm: bridge/analogix: add fast link train for eDP
  drm: bridge/analogix: enable vop standby when entry PSR

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 218 +++++++++++++++------
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |   7 +-
 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  |  25 ++-
 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c    |  33 +++-
 drivers/gpu/drm/rockchip/rockchip_drm_drv.h        |   1 +
 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        |  23 ++-
 8 files changed, 259 insertions(+), 82 deletions(-)

-- 
1.9.1

[PATCH v3 1/6] drm/bridge: analogix_dp: set psr activate/deactivate when enable/disable bridge

[Zain Wang]

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.

Signed-off-by: zain wang <wzz@rock-chips.com>
---

Changes in v3:
- remove changes before.
- move psr activat/deactivate to enable/disable bridge.

Changes in v2:
- add spin_lock to protect dpms_mode


 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c |  4 ++--
 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, 28 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index 8548e82..e5471e7 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -159,7 +159,7 @@ 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)
@@ -168,7 +168,7 @@ static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
 
 	clk_disable_unprepare(dp->pclk);
 
-	return 0;
+	return rockchip_drm_psr_deactivate(&dp->encoder);
 }
 
 static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
index a553e18..4c379e9 100644
--- 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(unsigned long data)
 
 /**
  * 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
--- 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 c7eba30..1740a0b 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -566,8 +566,6 @@ static void vop_crtc_disable(struct drm_crtc *crtc)
 
 	WARN_ON(vop->event);
 
-	rockchip_drm_psr_deactivate(&vop->crtc);
-
 	/*
 	 * We need to make sure that all windows are disabled before we
 	 * disable that crtc. Otherwise we might try to scan from a destroyed
@@ -975,8 +973,6 @@ static void vop_crtc_enable(struct drm_crtc *crtc)
 	clk_set_rate(vop->dclk, adjusted_mode->clock * 1000);
 
 	VOP_CTRL_SET(vop, standby, 0);
-
-	rockchip_drm_psr_activate(&vop->crtc);
 }
 
 static bool vop_fs_irq_is_pending(struct vop *vop)
-- 
1.9.1

[PATCH v3 2/6] drm/bridge: remove dp init from analogix_dp_bind

[Zain Wang]

From: zain wang <wzz@rock-chips.com>

phy_power_on() and analogix_dp_init_dp would be called in bridge_eanble,
so remove them from analogix_dp_bind to be clear.

Signed-off-by: zain wang <wzz@rock-chips.com>
---

Changes in v3:
- remove changes before
- remove phy_power_on() and analogix_dp_init_dp from analogix_dp_bind().

Changes in v2: None

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 001b075..bcae4dd 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1389,10 +1389,6 @@ int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
 
 	pm_runtime_enable(dev);
 
-	phy_power_on(dp->phy);
-
-	analogix_dp_init_dp(dp);
-
 	ret = devm_request_threaded_irq(&pdev->dev, dp->irq,
 					analogix_dp_hardirq,
 					analogix_dp_irq_thread,
-- 
1.9.1

Re: [PATCH v3 1/6] drm/bridge: analogix_dp: set psr activate/deactivate when enable/disable bridge

[Sean Paul]

On Tue, Oct 18, 2016 at 2:14 AM, Zain Wang <wzz@rock-chips.com> wrote:
> 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.
>

Reviewed-by: Sean Paul <seanpaul@chromium.org>

> Signed-off-by: zain wang <wzz@rock-chips.com>
> ---
>
> Changes in v3:
> - remove changes before.
> - move psr activat/deactivate to enable/disable bridge.
>
> Changes in v2:
> - add spin_lock to protect dpms_mode
>
>
>  drivers/gpu/drm/rockchip/analogix_dp-rockchip.c |  4 ++--
>  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, 28 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index 8548e82..e5471e7 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -159,7 +159,7 @@ 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)
> @@ -168,7 +168,7 @@ static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
>
>         clk_disable_unprepare(dp->pclk);
>
> -       return 0;
> +       return rockchip_drm_psr_deactivate(&dp->encoder);
>  }
>
>  static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> index a553e18..4c379e9 100644
> --- 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(unsigned long data)
>
>  /**
>   * 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
> --- 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 c7eba30..1740a0b 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -566,8 +566,6 @@ static void vop_crtc_disable(struct drm_crtc *crtc)
>
>         WARN_ON(vop->event);
>
> -       rockchip_drm_psr_deactivate(&vop->crtc);
> -
>         /*
>          * We need to make sure that all windows are disabled before we
>          * disable that crtc. Otherwise we might try to scan from a destroyed
> @@ -975,8 +973,6 @@ static void vop_crtc_enable(struct drm_crtc *crtc)
>         clk_set_rate(vop->dclk, adjusted_mode->clock * 1000);
>
>         VOP_CTRL_SET(vop, standby, 0);
> -
> -       rockchip_drm_psr_activate(&vop->crtc);
>  }
>
>  static bool vop_fs_irq_is_pending(struct vop *vop)
> --
> 1.9.1
>
>

Re: [PATCH v3 2/6] drm/bridge: remove dp init from analogix_dp_bind

[Sean Paul]

On Tue, Oct 18, 2016 at 2:14 AM, Zain Wang <wzz@rock-chips.com> wrote:
> From: zain wang <wzz@rock-chips.com>
>
> phy_power_on() and analogix_dp_init_dp would be called in bridge_eanble,
> so remove them from analogix_dp_bind to be clear.
>

Reviewed-by: Sean Paul <seanpaul@chromium.org>

> Signed-off-by: zain wang <wzz@rock-chips.com>
> ---
>
> Changes in v3:
> - remove changes before
> - remove phy_power_on() and analogix_dp_init_dp from analogix_dp_bind().
>
> Changes in v2: None
>
>  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 4 ----
>  1 file changed, 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index 001b075..bcae4dd 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -1389,10 +1389,6 @@ int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>
>         pm_runtime_enable(dev);
>
> -       phy_power_on(dp->phy);
> -
> -       analogix_dp_init_dp(dp);
> -
>         ret = devm_request_threaded_irq(&pdev->dev, dp->irq,
>                                         analogix_dp_hardirq,
>                                         analogix_dp_irq_thread,
> --
> 1.9.1
>
>