From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yakir Yang Subject: Re: [PATCH 10/12] drm: bridge/dw_hdmi: fix phy enable/disable handling Date: Wed, 07 Oct 2015 18:40:11 +0800 Message-ID: <5614F68B.6050808@rock-chips.com> References: <20150808160251.GM7557@n2100.arm.linux.org.uk> <56149A11.4070102@rock-chips.com> <20151007094831.GF21513@n2100.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0645163340==" Return-path: In-Reply-To: <20151007094831.GF21513@n2100.arm.linux.org.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Russell King - ARM Linux Cc: Fabio Estevam , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, Andy Yan , linux-arm-kernel@lists.infradead.org List-Id: linux-rockchip.vger.kernel.org This is a multi-part message in MIME format. --===============0645163340== Content-Type: multipart/alternative; boundary="------------040509080908050209010700" This is a multi-part message in MIME format. --------------040509080908050209010700 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit On 10/07/2015 05:48 PM, Russell King - ARM Linux wrote: > On Wed, Oct 07, 2015 at 12:05:37PM +0800, Yakir Yang wrote: >> >> On 08/09/2015 12:04 AM, Russell King wrote: >>> The dw_hdmi enable/disable handling is particularly weak in several >>> regards: >>> * The hotplug interrupt could call hdmi_poweron() or hdmi_poweroff() >>> while DRM is setting a mode, which could race with a mode being set. >>> * Hotplug will always re-enable the phy whenever it detects an active >>> hotplug signal, even if DRM has disabled the output. >>> >>> Resolve all of these by introducing a mutex to prevent races, and a >>> state-tracking bool so we know whether DRM wishes the output to be >>> enabled. We choose to use our own mutex rather than ->struct_mutex >>> so that we can still process interrupts in a timely fashion. >>> >>> Signed-off-by: Russell King >>> --- >>> drivers/gpu/drm/bridge/dw_hdmi.c | 29 ++++++++++++++++++++++------- >>> 1 file changed, 22 insertions(+), 7 deletions(-) >>> >>> diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c >>> index 7b8a4e942a71..0ee188930d26 100644 >>> --- a/drivers/gpu/drm/bridge/dw_hdmi.c >>> +++ b/drivers/gpu/drm/bridge/dw_hdmi.c >>> @@ -125,6 +125,9 @@ struct dw_hdmi { >>> bool sink_is_hdmi; >>> bool sink_has_audio; >>> + struct mutex mutex; /* for state below and previous_mode */ >>> + bool disabled; /* DRM has disabled our bridge */ >>> + >>> spinlock_t audio_lock; >>> struct mutex audio_mutex; >>> unsigned int sample_rate; >>> @@ -1389,8 +1392,12 @@ static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge, >>> { >>> struct dw_hdmi *hdmi = bridge->driver_private; >>> + mutex_lock(&hdmi->mutex); >>> + >>> /* Store the display mode for plugin/DKMS poweron events */ >>> memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode)); >>> + >>> + mutex_unlock(&hdmi->mutex); >>> } >>> static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge, >>> @@ -1404,14 +1411,20 @@ static void dw_hdmi_bridge_disable(struct drm_bridge *bridge) >>> { >>> struct dw_hdmi *hdmi = bridge->driver_private; >>> + mutex_lock(&hdmi->mutex); >>> + hdmi->disabled = true; >>> dw_hdmi_poweroff(hdmi); >>> + mutex_unlock(&hdmi->mutex); >>> } >>> static void dw_hdmi_bridge_enable(struct drm_bridge *bridge) >>> { >>> struct dw_hdmi *hdmi = bridge->driver_private; >>> + mutex_lock(&hdmi->mutex); >>> dw_hdmi_poweron(hdmi); >>> + hdmi->disabled = false; >>> + mutex_unlock(&hdmi->mutex); >>> } >>> static void dw_hdmi_bridge_nop(struct drm_bridge *bridge) >>> @@ -1534,20 +1547,20 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id) >>> phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0); >>> if (intr_stat & HDMI_IH_PHY_STAT0_HPD) { >>> + hdmi_modb(hdmi, ~phy_int_pol, HDMI_PHY_HPD, HDMI_PHY_POL0); >>> + mutex_lock(&hdmi->mutex); >>> if (phy_int_pol & HDMI_PHY_HPD) { >>> dev_dbg(hdmi->dev, "EVENT=plugin\n"); >>> - hdmi_modb(hdmi, 0, HDMI_PHY_HPD, HDMI_PHY_POL0); >>> - >>> - dw_hdmi_poweron(hdmi); >>> + if (!hdmi->disabled) >>> + dw_hdmi_poweron(hdmi); >>> } else { >>> dev_dbg(hdmi->dev, "EVENT=plugout\n"); >>> - hdmi_modb(hdmi, HDMI_PHY_HPD, HDMI_PHY_HPD, >>> - HDMI_PHY_POL0); >>> - >>> - dw_hdmi_poweroff(hdmi); >>> + if (!hdmi->disabled) >>> + dw_hdmi_poweroff(hdmi); >> Just like my reply on 08/12, I thought this could be removed, so >> poweron/poweroff would only be called with bridge->enable/ >> bridge->disable, them maybe no need mutex here. > The bridge enable/disable methods do not get called on hotplug changes. > > [ 1.363011] dwhdmi-imx 120000.hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1 > [ 1.371341] dwhdmi-imx 120000.hdmi: dw_hdmi_irq(I:RX----,HPD P:RX3210,HPD S:RX----,HPD) > [ 1.381345] imx-drm display-subsystem: bound 120000.hdmi (ops dw_hdmi_imx_ops) > [ 1.448691] dwhdmi-imx 120000.hdmi: dw_hdmi_bridge_disable() > [ 1.450963] dwhdmi-imx 120000.hdmi: dw_hdmi_bridge_enable() > > and then unplugging and re-plugging the HDMI cable: > > [ 68.307505] dwhdmi-imx 120000.hdmi: dw_hdmi_irq(I:RX----,HPD P:RX3210,--- S:RX----,---) > [ 73.813970] dwhdmi-imx 120000.hdmi: dw_hdmi_irq(I:RX----,HPD P:RX3210,HPD S:RX----,HPD) > > As you can see, during the period of disconnection for five seconds, > dw_hdmi_bridge_disable() was not called. > > So, without the code above, we'd be needlessly wasting power with the > bridge enabled, trying to drive a disconnected display. Strangely, I do see bridge enable/disable in my side, past the log and dump_stack bellow. And I guess your HDMI maybe not really hot pluged, could you confirm that the "status" of HDMI display card have been changed between "connected" and "disconnected". Do see bridge_disable when I unpluging the HDMI cable [ 16.358717] dwhdmi-rockchip ff980000.hdmi: EVENT=plugout [ 20.613221] [] (unwind_backtrace) from [] (show_stack+0x20/0x24) [ 20.631561] [] (show_stack) from [] (dump_stack+0x70/0x8c) [ 20.649337] [] (dump_stack) from [] (dw_hdmi_bridge_disable+0x1c/0x88) [ 20.668178] [] (dw_hdmi_bridge_disable) from [] (drm_encoder_disable+0x34/0x78) [ 20.687857] [] (drm_encoder_disable) from [] (__drm_helper_disable_unused_functions+0x68/0xe4) [ 20.708975] [] (__drm_helper_disable_unused_functions) from [] (drm_crtc_helper_set_config+0x128/0x85c) [ 20.731180] [] (drm_crtc_helper_set_config) from [] (drm_mode_set_config_internal+0x58/0xdc) [ 20.752507] [] (drm_mode_set_config_internal) from [] (commit_crtc_state+0x124/0x1ec) [ 20.773342] [] (commit_crtc_state) from [] (atomic_commit.isra.3+0x5c/0xc8) [ 20.793397] [] (atomic_commit.isra.3) from [] (drm_atomic_commit+0x1c/0x20) [ 20.813467] [] (drm_atomic_commit) from [] (drm_mode_setcrtc+0x324/0x3e4) [ 20.833379] [] (drm_mode_setcrtc) from [] (drm_ioctl+0x304/0x478) [ 20.852557] [] (drm_ioctl) from [] (do_vfs_ioctl+0x494/0x5a8) [ 20.871377] [] (do_vfs_ioctl) from [] (SyS_ioctl+0x5c/0x84) [ 20.890038] [] (SyS_ioctl) from [] (__sys_trace_return+0x0/0x14) [ 16.890157] ------- YAKIR: dw_hdmi_bridge_disable:1656 [ 16.897907] ------- YAKIR: dw_hdmi_poweroff:1631 Also see bridge have been disabled once before try to bridge_enable when I try re-plugging the HDMI cable [ 20.494292] dwhdmi-rockchip ff980000.hdmi: EVENT=plugin [ 12.599389] [] (unwind_backtrace) from [] (show_stack+0x20/0x24) [ 12.612238] [] (show_stack) from [] (dump_stack+0x70/0x8c) [ 12.624609] [] (dump_stack) from [] (dw_hdmi_bridge_disable+0x1c/0x88) [ 12.638055] [] (dw_hdmi_bridge_disable) from [] (drm_crtc_helper_set_mode+0x20c/0x4e0) [ 12.652878] [] (drm_crtc_helper_set_mode) from [] (drm_crtc_helper_set_config+0x5f4/0x85c) [ 12.668019] [] (drm_crtc_helper_set_config) from [] (drm_mode_set_config_internal+0x58/0xdc) [ 12.683442] [] (drm_mode_set_config_internal) from [] (commit_crtc_state+0x124/0x1ec) [ 12.698287] [] (commit_crtc_state) from [] (atomic_commit.isra.3+0x5c/0xc8) [ 12.712295] [] (atomic_commit.isra.3) from [] (drm_atomic_commit+0x1c/0x20) [ 12.726258] [] (drm_atomic_commit) from [] (drm_mode_setcrtc+0x324/0x3e4) [ 12.740226] [] (drm_mode_setcrtc) from [] (drm_ioctl+0x304/0x478) [ 12.753651] [] (drm_ioctl) from [] (do_vfs_ioctl+0x494/0x5a8) [ 12.766794] [] (do_vfs_ioctl) from [] (SyS_ioctl+0x5c/0x84) [ 12.779861] [] (SyS_ioctl) from [] (__sys_trace_return+0x0/0x14) [ 21.059320] ------- YAKIR: dw_hdmi_bridge_disable:1656 [ 21.068272] ------- YAKIR: dw_hdmi_poweroff:1631 [ 21.076714] rockchip-vop ff930000.vop: start latency exceeded, new value 9333 ns [ 21.088037] rockchip-vop ff930000.vop: Attached to iommu domain [ 12.871336] [] (unwind_backtrace) from [] (show_stack+0x20/0x24) [ 12.882067] [] (show_stack) from [] (dump_stack+0x70/0x8c) [ 12.892311] [] (dump_stack) from [] (dw_hdmi_bridge_enable+0x3c/0xf28) [ 12.903569] [] (dw_hdmi_bridge_enable) from [] (drm_crtc_helper_set_mode+0x42c/0x4e0) [ 12.916226] [] (drm_crtc_helper_set_mode) from [] (drm_crtc_helper_set_config+0x5f4/0x85c) [ 12.929450] [] (drm_crtc_helper_set_config) from [] (drm_mode_set_config_internal+0x58/0xdc) [ 12.942883] [] (drm_mode_set_config_internal) from [] (commit_crtc_state+0x124/0x1ec) [ 12.955784] [] (commit_crtc_state) from [] (atomic_commit.isra.3+0x5c/0xc8) [ 12.967753] [] (atomic_commit.isra.3) from [] (drm_atomic_commit+0x1c/0x20) [ 12.979705] [] (drm_atomic_commit) from [] (drm_mode_setcrtc+0x324/0x3e4) [ 12.991568] [] (drm_mode_setcrtc) from [] (drm_ioctl+0x304/0x478) [ 13.002817] [] (drm_ioctl) from [] (do_vfs_ioctl+0x494/0x5a8) [ 13.013766] [] (do_vfs_ioctl) from [] (SyS_ioctl+0x5c/0x84) [ 13.024655] [] (SyS_ioctl) from [] (__sys_trace_return+0x0/0x14) [ 21.114556] ------- YAKIR: dw_hdmi_bridge_enable:1664 [ 21.122889] ------- YAKIR: dw_hdmi_poweron:1625 - Yakir --------------040509080908050209010700 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable

On 10/07/2015 05:48 PM, Russell King - ARM Linux wrote:
On Wed, Oct 07, 2015 at 12:05:37PM +0800, Yakir Yang=
 wrote:


On 08/09/2015 12:04 AM, Russell King wrote:

The dw_hdmi enable/disable handling is particula=
rly weak in several
regards:
* The hotplug interrupt could call hdmi_poweron() or hdmi_poweroff()
  while DRM is setting a mode, which could race with a mode being set.
* Hotplug will always re-enable the phy whenever it detects an active
  hotplug signal, even if DRM has disabled the output.

Resolve all of these by introducing a mutex to prevent races, and a
state-tracking bool so we know whether DRM wishes the output to be
enabled.  We choose to use our own mutex rather than ->struct_mutex
so that we can still process interrupts in a timely fashion.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw=
_hdmi.c
index 7b8a4e942a71..0ee188930d26 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -125,6 +125,9 @@ struct dw_hdmi {
 	bool sink_is_hdmi;
 	bool sink_has_audio;
+	struct mutex mutex;		/* for state below and previous_mode */
+	bool disabled;			/* DRM has disabled our bridge */
+
 	spinlock_t audio_lock;
 	struct mutex audio_mutex;
 	unsigned int sample_rate;
@@ -1389,8 +1392,12 @@ static void dw_hdmi_bridge_mode_set(struct drm_bri=
dge *bridge,
 {
 	struct dw_hdmi *hdmi =3D bridge->driver_private;
+	mutex_lock(&hdmi->mutex);
+
 	/* Store the display mode for plugin/DKMS poweron events */
 	memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode=
));
+
+	mutex_unlock(&hdmi->mutex);
 }
 static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
@@ -1404,14 +1411,20 @@ static void dw_hdmi_bridge_disable(struct drm_bri=
dge *bridge)
 {
 	struct dw_hdmi *hdmi =3D bridge->driver_private;
+	mutex_lock(&hdmi->mutex);
+	hdmi->disabled =3D true;
 	dw_hdmi_poweroff(hdmi);
+	mutex_unlock(&hdmi->mutex);
 }
 static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
 {
 	struct dw_hdmi *hdmi =3D bridge->driver_private;
+	mutex_lock(&hdmi->mutex);
 	dw_hdmi_poweron(hdmi);
+	hdmi->disabled =3D false;
+	mutex_unlock(&hdmi->mutex);
 }
 static void dw_hdmi_bridge_nop(struct drm_bridge *bridge)
@@ -1534,20 +1547,20 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev=
_id)
 	phy_int_pol =3D hdmi_readb(hdmi, HDMI_PHY_POL0);
 	if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
+		hdmi_modb(hdmi, ~phy_int_pol, HDMI_PHY_HPD, HDMI_PHY_POL0);
+		mutex_lock(&hdmi->mutex);
 		if (phy_int_pol & HDMI_PHY_HPD) {
 			dev_dbg(hdmi->dev, "EVENT=3Dplugin\n");
-			hdmi_modb(hdmi, 0, HDMI_PHY_HPD, HDMI_PHY_POL0);
-
-			dw_hdmi_poweron(hdmi);
+			if (!hdmi->disabled)
+				dw_hdmi_poweron(hdmi);
 		} else {
 			dev_dbg(hdmi->dev, "EVENT=3Dplugout\n");
-			hdmi_modb(hdmi, HDMI_PHY_HPD, HDMI_PHY_HPD,
-				  HDMI_PHY_POL0);
-
-			dw_hdmi_poweroff(hdmi);
+			if (!hdmi->disabled)
+				dw_hdmi_poweroff(hdmi);

Just like my reply on 08/12, I thought this could be removed, so
poweron/poweroff would only be called with bridge->enable/
bridge->disable, them maybe no need mutex here.

The bridge enable/disable methods do not get called on hotplug changes.

[    1.363011] dwhdmi-imx 120000.hdmi: Detected HDMI controller 0x13:0xa:=
0xa0:0xc1
[    1.371341] dwhdmi-imx 120000.hdmi: dw_hdmi_irq(I:RX----,HPD P:RX3210,=
HPD S:RX----,HPD)
[    1.381345] imx-drm display-subsystem: bound 120000.hdmi (ops dw_hdmi_=
imx_ops)
[    1.448691] dwhdmi-imx 120000.hdmi: dw_hdmi_bridge_disable()
[    1.450963] dwhdmi-imx 120000.hdmi: dw_hdmi_bridge_enable()

and then unplugging and re-plugging the HDMI cable:

[   68.307505] dwhdmi-imx 120000.hdmi: dw_hdmi_irq(I:RX----,HPD P:RX3210,=
--- S:RX----,---)
[   73.813970] dwhdmi-imx 120000.hdmi: dw_hdmi_irq(I:RX----,HPD P:RX3210,=
HPD S:RX----,HPD)

As you can see, during the period of disconnection for five seconds,
dw_hdmi_bridge_disable() was not called.

So, without the code above, we'd be needlessly wasting power with the
bridge enabled, trying to drive a disconnected display.

Strangely, I do see bridge enable/disable in my side, past the log and dump_stack bellow.

And I guess your HDMI maybe not really hot pluged, could you confirm that the "status"
of HDMI display card have been changed between "connected" and "disconnected".


Do see bridge_disable when I unpluging the HDMI cable
[=A0=A0 16.358717] dwhdmi-rockchip ff980000.hdmi: EVENT=3Dplugout
[=A0=A0 20.613221] [<c010e030>] (unwind_backtrace) from [<c010a4e0>] (show_stack+0x20/0x24)
[=A0=A0 20.631561] [<c010a4e0>] (show_stack) from [<c0896828>] (dump_stack+0x70/0x8c)
[=A0=A0 20.649337] [<c0896828>] (dump_stack) from [<c0414038>] (dw_hdmi_bridge_disable+0x1c/0x88)
[=A0=A0 20.668178] [<c0414038>] (dw_hdmi_bridge_disable) from [<c03e3888>] (drm_encoder_disable+0x34/0x78)
[=A0=A0 20.687857] [<c03e3888>] (drm_encoder_disable) from [<c03e3b1c>] (__drm_helper_disable_unused_functions+0x68/0xe4)
[=A0=A0 20.708975] [<c03e3b1c>] (__drm_helper_disable_unused_functions) from [<c03e4320>] (drm_crtc_helper_set_config+0x128/0x85c)
[=A0=A0 20.731180] [<c03e4320>] (drm_crtc_helper_set_config) from [<c03f5e3c>] (drm_mode_set_config_internal+0x58/0xdc) [=A0=A0 20.752507] [<c03f5e3c>] (drm_mode_set_config_internal= ) from [<c0405ed0>] (commit_crtc_state+0x124/0x1ec)
[=A0=A0 20.773342] [<c0405ed0>] (commit_crtc_state) from [<c04055d4>] (atomic_commit.isra.3+0x5c/0xc8)
[=A0=A0 20.793397] [<c04055d4>] (atomic_commit.isra.3) from [<c040565c>] (drm_atomic_commit+0x1c/0x20)
[=A0=A0 20.813467] [<c040565c>] (drm_atomic_commit) from [<c03fa480>] (drm_mode_setcrtc+0x324/0x3e4)
[=A0=A0 20.833379] [<c03fa480>] (drm_mode_setcrtc) from [<c03eb320>] (drm_ioctl+0x304/0x478)
[=A0=A0 20.852557] [<c03eb320>] (drm_ioctl) from [<c021f024>] (do_vfs_ioctl+0x494/0x5a8)
[=A0=A0 20.871377] [<c021f024>] (do_vfs_ioctl) from [<c021f194>] (SyS_ioctl+0x5c/0x84)
[=A0=A0 20.890038] [<c021f194>] (SyS_ioctl) from [<c010646c>] (__sys_trace_return+0x0/0x14)
[=A0=A0 16.890157] ------- YAKIR: dw_hdmi_bridge_disable:1656
[=A0=A0 16.897907] ------- YAKIR: dw_hdmi_poweroff:1631

Also see bridge have been disabled once before try to bridge_enable when I try re-plugging the HDMI cable
[=A0=A0 20.494292] dwhdmi-rockchip ff980000.hdmi: EVENT=3Dplugin
[=A0=A0 12.599389] [<c010e030>] (unwind_backtrace) from [<c010a4e0>] (show_stack+0x20/0x24)
[=A0=A0 12.612238] [<c010a4e0>] (show_stack) from [<c0896828>] (dump_stack+0x70/0x8c)
[=A0=A0 12.624609] [<c0896828>] (dump_stack) from [<c0414038>] (dw_hdmi_bridge_disable+0x1c/0x88)
[=A0=A0 12.638055] [<c0414038>] (dw_hdmi_bridge_disable) from [<c03e3dd4>] (drm_crtc_helper_set_mode+0x20c/0x4e0)
[=A0=A0 12.652878] [<c03e3dd4>] (drm_crtc_helper_set_mode) fr= om [<c03e47ec>] (drm_crtc_helper_set_config+0x5f4/0x85c)
[=A0=A0 12.668019] [<c03e47ec>] (drm_crtc_helper_set_config) from [<c03f5e3c>] (drm_mode_set_config_internal+0x58/0xdc) [=A0=A0 12.683442] [<c03f5e3c>] (drm_mode_set_config_internal= ) from [<c0405ed0>] (commit_crtc_state+0x124/0x1ec)
[=A0=A0 12.698287] [<c0405ed0>] (commit_crtc_state) from [<c04055d4>] (atomic_commit.isra.3+0x5c/0xc8)
[=A0=A0 12.712295] [<c04055d4>] (atomic_commit.isra.3) from [<c040565c>] (drm_atomic_commit+0x1c/0x20)
[=A0=A0 12.726258] [<c040565c>] (drm_atomic_commit) from [<c03fa480>] (drm_mode_setcrtc+0x324/0x3e4)
[=A0=A0 12.740226] [<c03fa480>] (drm_mode_setcrtc) from [<c03eb320>] (drm_ioctl+0x304/0x478)
[=A0=A0 12.753651] [<c03eb320>] (drm_ioctl) from [<c021f024>] (do_vfs_ioctl+0x494/0x5a8)
[=A0=A0 12.766794] [<c021f024>] (do_vfs_ioctl) from [<c021f194>] (SyS_ioctl+0x5c/0x84)
[=A0=A0 12.779861] [<c021f194>] (SyS_ioctl) from [<c010646c>] (__sys_trace_return+0x0/0x14)
[=A0=A0 21.059320] ------- YAKIR: dw_hdmi_bridge_disable:1656
[=A0=A0 21.068272] ------- YAKIR: dw_hdmi_poweroff:1631
[=A0=A0 21.076714] rockchip-vop ff930000.vop: start latency exceeded, new value 9333 ns
[=A0=A0 21.088037] rockchip-vop ff930000.vop: Attached to iommu domai= n
[=A0=A0 12.871336] [<c010e030>] (unwind_backtrace) from [<c010a4e0>] (show_stack+0x20/0x24)
[=A0=A0 12.882067] [<c010a4e0>] (show_stack) from [<c0896828>] (dump_stack+0x70/0x8c)
[=A0=A0 12.892311] [<c0896828>] (dump_stack) from [<c0414134>] (dw_hdmi_bridge_enable+0x3c/0xf28)
[=A0=A0 12.903569] [<c0414134>] (dw_hdmi_bridge_enable) from [<c03e3ff4>] (drm_crtc_helper_set_mode+0x42c/0x4e0)
[=A0=A0 12.916226] [<c03e3ff4>] (drm_crtc_helper_set_mode) fr= om [<c03e47ec>] (drm_crtc_helper_set_config+0x5f4/0x85c)
[=A0=A0 12.929450] [<c03e47ec>] (drm_crtc_helper_set_config) from [<c03f5e3c>] (drm_mode_set_config_internal+0x58/0xdc) [=A0=A0 12.942883] [<c03f5e3c>] (drm_mode_set_config_internal= ) from [<c0405ed0>] (commit_crtc_state+0x124/0x1ec)
[=A0=A0 12.955784] [<c0405ed0>] (commit_crtc_state) from [<c04055d4>] (atomic_commit.isra.3+0x5c/0xc8)
[=A0=A0 12.967753] [<c04055d4>] (atomic_commit.isra.3) from [<c040565c>] (drm_atomic_commit+0x1c/0x20)
[=A0=A0 12.979705] [<c040565c>] (drm_atomic_commit) from [<c03fa480>] (drm_mode_setcrtc+0x324/0x3e4)
[=A0=A0 12.991568] [<c03fa480>] (drm_mode_setcrtc) from [<c03eb320>] (drm_ioctl+0x304/0x478)
[=A0=A0 13.002817] [<c03eb320>] (drm_ioctl) from [<c021f024>] (do_vfs_ioctl+0x494/0x5a8)
[=A0=A0 13.013766] [<c021f024>] (do_vfs_ioctl) from [<c021f194>] (SyS_ioctl+0x5c/0x84)
[=A0=A0 13.024655] [<c021f194>] (SyS_ioctl) from [<c010646c>] (__sys_trace_return+0x0/0x14)
[=A0=A0 21.114556] ------- YAKIR: dw_hdmi_bridge_enable:1664
[=A0=A0 21.122889] ------- YAKIR: dw_hdmi_poweron:1625


- Yakir

    

    

  


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