* [PATCH] drm/stm: repair runtime power management
@ 2020-02-29 22:16 Marek Vasut
2020-03-09 10:35 ` Yannick FERTRE
2020-07-02 12:31 ` Philippe CORNU
0 siblings, 2 replies; 8+ messages in thread
From: Marek Vasut @ 2020-02-29 22:16 UTC (permalink / raw)
To: dri-devel
Cc: Marek Vasut, Maxime Coquelin, Philippe Cornu, Yannick Fertré,
Vincent Abriou, linux-stm32, linux-arm-kernel, Alexandre Torgue
Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to
match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise
the LTDC might suspend via runtime PM, disable clock, and then fail
to resume later on.
The test which triggers it is roughly -- run qt5 application which
uses eglfs platform and etnaviv, stop the application, sleep for 15
minutes, run the application again. This leads to a timeout waiting
for vsync, because the LTDC has suspended, but did not resume.
Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Yannick Fertré <yannick.fertre@st.com>
Cc: Philippe Cornu <philippe.cornu@st.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
To: dri-devel@lists.freedesktop.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
[CRTC:35:crtc-0] vblank wait timed out
Modules linked in:
CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2
Hardware name: STM32 (Device Tree Support)
[<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14)
[<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0)
[<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0)
[<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8)
[<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
[<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
x50/0x60)
[<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c)
[<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
[<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
[<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550)
[<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8)
[<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c)
[<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38)
[<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0)
[<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54)
Exception stack(0xee8f3fa8 to 0xee8f3ff0)
3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
3fe0: b113b098 adcbeafc b1125413 b6155cf8
---[ end trace 2ad5ba954ceb767a ]---
---
drivers/gpu/drm/stm/ltdc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 99bf93e8b36f..301de0498078 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_device *ddev = crtc->dev;
DRM_DEBUG_DRIVER("\n");
+ pm_runtime_get_sync(ddev->dev);
+
/* Sets the background color value */
reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
--
2.25.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread* RE: [PATCH] drm/stm: repair runtime power management
2020-02-29 22:16 [PATCH] drm/stm: repair runtime power management Marek Vasut
@ 2020-03-09 10:35 ` Yannick FERTRE
2020-03-09 11:57 ` Marek Vasut
2020-07-02 12:31 ` Philippe CORNU
1 sibling, 1 reply; 8+ messages in thread
From: Yannick FERTRE @ 2020-03-09 10:35 UTC (permalink / raw)
To: Marek Vasut, dri-devel
Cc: Philippe CORNU, Maxime Coquelin, Vincent ABRIOU, linux-stm32,
linux-arm-kernel, Alexandre TORGUE
Hello Marek,
Thank for your patch. Pm_runtime_put_sync is also done into function ltdc_crtc_mode_fixup.
To avoid several call of Pm_runtime_put_sync, it could be better to check pm_runtime activity:
+ int ret;
DRM_DEBUG_DRIVER("\n");
+ if (!pm_runtime_active(ddev->dev)) {
+ ret = pm_runtime_get_sync(ddev->dev);
+ if (ret) {
+ DRM_ERROR("Failed to enable crtc, cannot get sync\n");
+ return;
+ }
+ }
+
Best regards
Yannick Fertré
-----Original Message-----
From: Marek Vasut <marex@denx.de>
Sent: samedi 29 février 2020 23:17
To: dri-devel@lists.freedesktop.org
Cc: Marek Vasut <marex@denx.de>; Yannick FERTRE <yannick.fertre@st.com>; Philippe CORNU <philippe.cornu@st.com>; Benjamin Gaignard <benjamin.gaignard@linaro.org>; Vincent ABRIOU <vincent.abriou@st.com>; Maxime Coquelin <mcoquelin.stm32@gmail.com>; Alexandre TORGUE <alexandre.torgue@st.com>; linux-stm32@st-md-mailman.stormreply.com; linux-arm-kernel@lists.infradead.org
Subject: [PATCH] drm/stm: repair runtime power management
Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise the LTDC might suspend via runtime PM, disable clock, and then fail to resume later on.
The test which triggers it is roughly -- run qt5 application which uses eglfs platform and etnaviv, stop the application, sleep for 15 minutes, run the application again. This leads to a timeout waiting for vsync, because the LTDC has suspended, but did not resume.
Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Yannick Fertré <yannick.fertre@st.com>
Cc: Philippe Cornu <philippe.cornu@st.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
To: dri-devel@lists.freedesktop.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
[CRTC:35:crtc-0] vblank wait timed out
Modules linked in:
CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2 Hardware name: STM32 (Device Tree Support) [<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14) [<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0) [<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0) [<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8) [<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
[<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
x50/0x60)
[<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c) [<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
[<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
[<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550) [<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8) [<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c) [<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38) [<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0) [<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54) Exception stack(0xee8f3fa8 to 0xee8f3ff0)
3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
3fe0: b113b098 adcbeafc b1125413 b6155cf8 ---[ end trace 2ad5ba954ceb767a ]---
---
drivers/gpu/drm/stm/ltdc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 99bf93e8b36f..301de0498078 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state) {
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_device *ddev = crtc->dev;
DRM_DEBUG_DRIVER("\n");
+ pm_runtime_get_sync(ddev->dev);
+
/* Sets the background color value */
reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
--
2.25.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] drm/stm: repair runtime power management
2020-03-09 10:35 ` Yannick FERTRE
@ 2020-03-09 11:57 ` Marek Vasut
2020-07-01 12:14 ` Yannick FERTRE
0 siblings, 1 reply; 8+ messages in thread
From: Marek Vasut @ 2020-03-09 11:57 UTC (permalink / raw)
To: Yannick FERTRE, dri-devel
Cc: Philippe CORNU, Maxime Coquelin, Vincent ABRIOU, linux-stm32,
linux-arm-kernel, Alexandre TORGUE
On 3/9/20 11:35 AM, Yannick FERTRE wrote:
> Hello Marek,
Hi,
(please stop top-posting)
> Thank for your patch. Pm_runtime_put_sync is also done into function ltdc_crtc_mode_fixup.
> To avoid several call of Pm_runtime_put_sync, it could be better to check pm_runtime activity:
>
> + int ret;
>
> DRM_DEBUG_DRIVER("\n");
>
> + if (!pm_runtime_active(ddev->dev)) {
> + ret = pm_runtime_get_sync(ddev->dev);
> + if (ret) {
> + DRM_ERROR("Failed to enable crtc, cannot get sync\n");
> + return;
> + }
> + }
> +
Where should this go ? And wouldn't that only hide nastier PM imbalance
issues ?
> Best regards
>
> Yannick Fertré
>
>
> -----Original Message-----
> From: Marek Vasut <marex@denx.de>
> Sent: samedi 29 février 2020 23:17
> To: dri-devel@lists.freedesktop.org
> Cc: Marek Vasut <marex@denx.de>; Yannick FERTRE <yannick.fertre@st.com>; Philippe CORNU <philippe.cornu@st.com>; Benjamin Gaignard <benjamin.gaignard@linaro.org>; Vincent ABRIOU <vincent.abriou@st.com>; Maxime Coquelin <mcoquelin.stm32@gmail.com>; Alexandre TORGUE <alexandre.torgue@st.com>; linux-stm32@st-md-mailman.stormreply.com; linux-arm-kernel@lists.infradead.org
> Subject: [PATCH] drm/stm: repair runtime power management
>
> Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise the LTDC might suspend via runtime PM, disable clock, and then fail to resume later on.
>
> The test which triggers it is roughly -- run qt5 application which uses eglfs platform and etnaviv, stop the application, sleep for 15 minutes, run the application again. This leads to a timeout waiting for vsync, because the LTDC has suspended, but did not resume.
>
> Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Yannick Fertré <yannick.fertre@st.com>
> Cc: Philippe Cornu <philippe.cornu@st.com>
> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> Cc: Vincent Abriou <vincent.abriou@st.com>
> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> Cc: Alexandre Torgue <alexandre.torgue@st.com>
> To: dri-devel@lists.freedesktop.org
> Cc: linux-stm32@st-md-mailman.stormreply.com
> Cc: linux-arm-kernel@lists.infradead.org
> ---
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
> [CRTC:35:crtc-0] vblank wait timed out
> Modules linked in:
> CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2 Hardware name: STM32 (Device Tree Support) [<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14) [<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0) [<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0) [<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8) [<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
> [<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
> x50/0x60)
> [<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c) [<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
> [<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
> [<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550) [<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8) [<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c) [<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38) [<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0) [<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54) Exception stack(0xee8f3fa8 to 0xee8f3ff0)
> 3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
> 3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
> 3fe0: b113b098 adcbeafc b1125413 b6155cf8 ---[ end trace 2ad5ba954ceb767a ]---
> ---
> drivers/gpu/drm/stm/ltdc.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 99bf93e8b36f..301de0498078 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
> struct drm_crtc_state *old_state) {
> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> + struct drm_device *ddev = crtc->dev;
>
> DRM_DEBUG_DRIVER("\n");
>
> + pm_runtime_get_sync(ddev->dev);
> +
> /* Sets the background color value */
> reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
>
> --
> 2.25.0
>
--
Best regards,
Marek Vasut
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] drm/stm: repair runtime power management
2020-03-09 11:57 ` Marek Vasut
@ 2020-07-01 12:14 ` Yannick FERTRE
2020-07-02 10:07 ` Philippe CORNU
0 siblings, 1 reply; 8+ messages in thread
From: Yannick FERTRE @ 2020-07-01 12:14 UTC (permalink / raw)
To: Marek Vasut, dri-devel
Cc: Philippe CORNU, Maxime Coquelin, Vincent ABRIOU, linux-stm32,
linux-arm-kernel, Alexandre TORGUE
On 3/9/20 12:57 PM, Marek Vasut wrote:
> On 3/9/20 11:35 AM, Yannick FERTRE wrote:
>> Hello Marek,
>
> Hi,
>
> (please stop top-posting)
>
>> Thank for your patch. Pm_runtime_put_sync is also done into function ltdc_crtc_mode_fixup.
>> To avoid several call of Pm_runtime_put_sync, it could be better to check pm_runtime activity:
>>
>> + int ret;
>>
>> DRM_DEBUG_DRIVER("\n");
>>
>> + if (!pm_runtime_active(ddev->dev)) {
>> + ret = pm_runtime_get_sync(ddev->dev);
>> + if (ret) {
>> + DRM_ERROR("Failed to enable crtc, cannot get sync\n");
>> + return;
>> + }
>> + }
>> +
>
> Where should this go ? And wouldn't that only hide nastier PM imbalance
> issues ?
Hi Marek,
I tested the patch & it generate an error when I try wake up / sleep
the board STM32MP1 DK2 with weston application.
It need an additional patch
drm-stm-ltdc-remove-call-of-pm-runtime-functions.
Thanks for the patch.
Tested-by: Yannick Fertre <yannick.fertre@st.com>
>
>> Best regards
>>
>> Yannick Fertré
>>
>>
>> -----Original Message-----
>> From: Marek Vasut <marex@denx.de>
>> Sent: samedi 29 février 2020 23:17
>> To: dri-devel@lists.freedesktop.org
>> Cc: Marek Vasut <marex@denx.de>; Yannick FERTRE <yannick.fertre@st.com>; Philippe CORNU <philippe.cornu@st.com>; Benjamin Gaignard <benjamin.gaignard@linaro.org>; Vincent ABRIOU <vincent.abriou@st.com>; Maxime Coquelin <mcoquelin.stm32@gmail.com>; Alexandre TORGUE <alexandre.torgue@st.com>; linux-stm32@st-md-mailman.stormreply.com; linux-arm-kernel@lists.infradead.org
>> Subject: [PATCH] drm/stm: repair runtime power management
>>
>> Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise the LTDC might suspend via runtime PM, disable clock, and then fail to resume later on.
>>
>> The test which triggers it is roughly -- run qt5 application which uses eglfs platform and etnaviv, stop the application, sleep for 15 minutes, run the application again. This leads to a timeout waiting for vsync, because the LTDC has suspended, but did not resume.
>>
>> Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
>> Signed-off-by: Marek Vasut <marex@denx.de>
>> Cc: Yannick Fertré <yannick.fertre@st.com>
>> Cc: Philippe Cornu <philippe.cornu@st.com>
>> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
>> Cc: Vincent Abriou <vincent.abriou@st.com>
>> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
>> Cc: Alexandre Torgue <alexandre.torgue@st.com>
>> To: dri-devel@lists.freedesktop.org
>> Cc: linux-stm32@st-md-mailman.stormreply.com
>> Cc: linux-arm-kernel@lists.infradead.org
>> ---
>> ------------[ cut here ]------------
>> WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
>> [CRTC:35:crtc-0] vblank wait timed out
>> Modules linked in:
>> CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2 Hardware name: STM32 (Device Tree Support) [<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14) [<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0) [<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0) [<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8) [<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
>> [<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
>> x50/0x60)
>> [<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c) [<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
>> [<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
>> [<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550) [<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8) [<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c) [<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38) [<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0) [<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54) Exception stack(0xee8f3fa8 to 0xee8f3ff0)
>> 3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
>> 3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
>> 3fe0: b113b098 adcbeafc b1125413 b6155cf8 ---[ end trace 2ad5ba954ceb767a ]---
>> ---
>> drivers/gpu/drm/stm/ltdc.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 99bf93e8b36f..301de0498078 100644
>> --- a/drivers/gpu/drm/stm/ltdc.c
>> +++ b/drivers/gpu/drm/stm/ltdc.c
>> @@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
>> struct drm_crtc_state *old_state) {
>> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
>> + struct drm_device *ddev = crtc->dev;
>>
>> DRM_DEBUG_DRIVER("\n");
>>
>> + pm_runtime_get_sync(ddev->dev);
>> +
>> /* Sets the background color value */
>> reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
>>
>> --
>> 2.25.0
>>
>
>
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https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] drm/stm: repair runtime power management
2020-07-01 12:14 ` Yannick FERTRE
@ 2020-07-02 10:07 ` Philippe CORNU
2020-07-02 10:53 ` Marek Vasut
0 siblings, 1 reply; 8+ messages in thread
From: Philippe CORNU @ 2020-07-02 10:07 UTC (permalink / raw)
To: Yannick FERTRE, Marek Vasut, dri-devel
Cc: Maxime Coquelin, Vincent ABRIOU, linux-stm32, linux-arm-kernel,
Alexandre TORGUE
On 7/1/20 2:14 PM, Yannick FERTRE wrote:
>
>
> On 3/9/20 12:57 PM, Marek Vasut wrote:
>> On 3/9/20 11:35 AM, Yannick FERTRE wrote:
>>> Hello Marek,
>>
>> Hi,
>>
>> (please stop top-posting)
>>
>>> Thank for your patch. Pm_runtime_put_sync is also done into function ltdc_crtc_mode_fixup.
>>> To avoid several call of Pm_runtime_put_sync, it could be better to check pm_runtime activity:
>>>
>>> + int ret;
>>>
>>> DRM_DEBUG_DRIVER("\n");
>>>
>>> + if (!pm_runtime_active(ddev->dev)) {
>>> + ret = pm_runtime_get_sync(ddev->dev);
>>> + if (ret) {
>>> + DRM_ERROR("Failed to enable crtc, cannot get sync\n");
>>> + return;
>>> + }
>>> + }
>>> +
>>
>> Where should this go ? And wouldn't that only hide nastier PM imbalance
>> issues ?
> Hi Marek,
> I tested the patch & it generate an error when I try wake up / sleep
> the board STM32MP1 DK2 with weston application.
> It need an additional patch
> drm-stm-ltdc-remove-call-of-pm-runtime-functions.
>
> Thanks for the patch.
>
> Tested-by: Yannick Fertre <yannick.fertre@st.com>
>
Hi Marek,
before merging the 2 patches, I would like to be sure that Yannick's
patch does not "break" your use case (Qt I think)?
May I ask you please to give it a try?
Note: If you think there is no need to do extra checks, simply tell me
of course
Philippe :-)
>
>>
>>> Best regards
>>>
>>> Yannick Fertré
>>>
>>>
>>> -----Original Message-----
>>> From: Marek Vasut <marex@denx.de>
>>> Sent: samedi 29 février 2020 23:17
>>> To: dri-devel@lists.freedesktop.org
>>> Cc: Marek Vasut <marex@denx.de>; Yannick FERTRE <yannick.fertre@st.com>; Philippe CORNU <philippe.cornu@st.com>; Benjamin Gaignard <benjamin.gaignard@linaro.org>; Vincent ABRIOU <vincent.abriou@st.com>; Maxime Coquelin <mcoquelin.stm32@gmail.com>; Alexandre TORGUE <alexandre.torgue@st.com>; linux-stm32@st-md-mailman.stormreply.com; linux-arm-kernel@lists.infradead.org
>>> Subject: [PATCH] drm/stm: repair runtime power management
>>>
>>> Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise the LTDC might suspend via runtime PM, disable clock, and then fail to resume later on.
>>>
>>> The test which triggers it is roughly -- run qt5 application which uses eglfs platform and etnaviv, stop the application, sleep for 15 minutes, run the application again. This leads to a timeout waiting for vsync, because the LTDC has suspended, but did not resume.
>>>
>>> Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
>>> Signed-off-by: Marek Vasut <marex@denx.de>
>>> Cc: Yannick Fertré <yannick.fertre@st.com>
>>> Cc: Philippe Cornu <philippe.cornu@st.com>
>>> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
>>> Cc: Vincent Abriou <vincent.abriou@st.com>
>>> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
>>> Cc: Alexandre Torgue <alexandre.torgue@st.com>
>>> To: dri-devel@lists.freedesktop.org
>>> Cc: linux-stm32@st-md-mailman.stormreply.com
>>> Cc: linux-arm-kernel@lists.infradead.org
>>> ---
>>> ------------[ cut here ]------------
>>> WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
>>> [CRTC:35:crtc-0] vblank wait timed out
>>> Modules linked in:
>>> CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2 Hardware name: STM32 (Device Tree Support) [<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14) [<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0) [<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0) [<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8) [<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
>>> [<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
>>> x50/0x60)
>>> [<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c) [<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
>>> [<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
>>> [<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550) [<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8) [<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c) [<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38) [<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0) [<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54) Exception stack(0xee8f3fa8 to 0xee8f3ff0)
>>> 3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
>>> 3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
>>> 3fe0: b113b098 adcbeafc b1125413 b6155cf8 ---[ end trace 2ad5ba954ceb767a ]---
>>> ---
>>> drivers/gpu/drm/stm/ltdc.c | 3 +++
>>> 1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 99bf93e8b36f..301de0498078 100644
>>> --- a/drivers/gpu/drm/stm/ltdc.c
>>> +++ b/drivers/gpu/drm/stm/ltdc.c
>>> @@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
>>> struct drm_crtc_state *old_state) {
>>> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
>>> + struct drm_device *ddev = crtc->dev;
>>>
>>> DRM_DEBUG_DRIVER("\n");
>>>
>>> + pm_runtime_get_sync(ddev->dev);
>>> +
>>> /* Sets the background color value */
>>> reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
>>>
>>> --
>>> 2.25.0
>>>
>>
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] drm/stm: repair runtime power management
2020-07-02 10:07 ` Philippe CORNU
@ 2020-07-02 10:53 ` Marek Vasut
0 siblings, 0 replies; 8+ messages in thread
From: Marek Vasut @ 2020-07-02 10:53 UTC (permalink / raw)
To: Philippe CORNU, Yannick FERTRE, dri-devel
Cc: Maxime Coquelin, Vincent ABRIOU, linux-stm32, linux-arm-kernel,
Alexandre TORGUE
On 7/2/20 12:07 PM, Philippe CORNU wrote:
Hi,
[...]
>>>> Thank for your patch. Pm_runtime_put_sync is also done into function ltdc_crtc_mode_fixup.
>>>> To avoid several call of Pm_runtime_put_sync, it could be better to check pm_runtime activity:
>>>>
>>>> + int ret;
>>>>
>>>> DRM_DEBUG_DRIVER("\n");
>>>>
>>>> + if (!pm_runtime_active(ddev->dev)) {
>>>> + ret = pm_runtime_get_sync(ddev->dev);
>>>> + if (ret) {
>>>> + DRM_ERROR("Failed to enable crtc, cannot get sync\n");
>>>> + return;
>>>> + }
>>>> + }
>>>> +
>>>
>>> Where should this go ? And wouldn't that only hide nastier PM imbalance
>>> issues ?
>> Hi Marek,
>> I tested the patch & it generate an error when I try wake up / sleep
>> the board STM32MP1 DK2 with weston application.
>> It need an additional patch
>> drm-stm-ltdc-remove-call-of-pm-runtime-functions.
>>
>> Thanks for the patch.
>>
>> Tested-by: Yannick Fertre <yannick.fertre@st.com>
>>
>
> Hi Marek,
> before merging the 2 patches, I would like to be sure that Yannick's
> patch does not "break" your use case (Qt I think)?
> May I ask you please to give it a try?
> Note: If you think there is no need to do extra checks, simply tell me
> of course
It's fine, thanks !
--
Best regards,
Marek Vasut
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] drm/stm: repair runtime power management
2020-02-29 22:16 [PATCH] drm/stm: repair runtime power management Marek Vasut
2020-03-09 10:35 ` Yannick FERTRE
@ 2020-07-02 12:31 ` Philippe CORNU
2020-07-08 9:49 ` Benjamin Gaignard
1 sibling, 1 reply; 8+ messages in thread
From: Philippe CORNU @ 2020-07-02 12:31 UTC (permalink / raw)
To: Marek Vasut, dri-devel
Cc: Yannick FERTRE, Maxime Coquelin, Vincent ABRIOU, linux-stm32,
linux-arm-kernel, Alexandre TORGUE
On 2/29/20 11:16 PM, Marek Vasut wrote:
> Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to
> match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise
> the LTDC might suspend via runtime PM, disable clock, and then fail
> to resume later on.
>
> The test which triggers it is roughly -- run qt5 application which
> uses eglfs platform and etnaviv, stop the application, sleep for 15
> minutes, run the application again. This leads to a timeout waiting
> for vsync, because the LTDC has suspended, but did not resume.
>
> Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Yannick Fertré <yannick.fertre@st.com>
> Cc: Philippe Cornu <philippe.cornu@st.com>
> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> Cc: Vincent Abriou <vincent.abriou@st.com>
> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> Cc: Alexandre Torgue <alexandre.torgue@st.com>
> To: dri-devel@lists.freedesktop.org
> Cc: linux-stm32@st-md-mailman.stormreply.com
> Cc: linux-arm-kernel@lists.infradead.org
> ---
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
> [CRTC:35:crtc-0] vblank wait timed out
> Modules linked in:
> CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2
> Hardware name: STM32 (Device Tree Support)
> [<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14)
> [<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0)
> [<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0)
> [<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8)
> [<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
> [<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
> x50/0x60)
> [<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c)
> [<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
> [<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
> [<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550)
> [<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8)
> [<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c)
> [<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38)
> [<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0)
> [<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54)
> Exception stack(0xee8f3fa8 to 0xee8f3ff0)
> 3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
> 3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
> 3fe0: b113b098 adcbeafc b1125413 b6155cf8
> ---[ end trace 2ad5ba954ceb767a ]---
> ---
> drivers/gpu/drm/stm/ltdc.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index 99bf93e8b36f..301de0498078 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
> struct drm_crtc_state *old_state)
> {
> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> + struct drm_device *ddev = crtc->dev;
>
> DRM_DEBUG_DRIVER("\n");
>
> + pm_runtime_get_sync(ddev->dev);
> +
> /* Sets the background color value */
> reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
>
>
Hi Marek,
Many thanks for your patch,
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Yannick Fertre <yannick.fertre@st.com>
Hi Benjamin,
Could you please apply "drm/stm: ltdc: remove call of pm-runtime
functions" **before** this one. Thank you.
Philippe :-)
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] drm/stm: repair runtime power management
2020-07-02 12:31 ` Philippe CORNU
@ 2020-07-08 9:49 ` Benjamin Gaignard
0 siblings, 0 replies; 8+ messages in thread
From: Benjamin Gaignard @ 2020-07-08 9:49 UTC (permalink / raw)
To: Philippe CORNU
Cc: Marek Vasut, Alexandre TORGUE, dri-devel, Yannick FERTRE,
Maxime Coquelin, Vincent ABRIOU, linux-stm32, linux-arm-kernel
Le jeu. 2 juil. 2020 à 14:31, Philippe CORNU <philippe.cornu@st.com> a écrit :
>
>
>
> On 2/29/20 11:16 PM, Marek Vasut wrote:
> > Add missing pm_runtime_get_sync() into ltdc_crtc_atomic_enable() to
> > match pm_runtime_put_sync() in ltdc_crtc_atomic_disable(), otherwise
> > the LTDC might suspend via runtime PM, disable clock, and then fail
> > to resume later on.
> >
> > The test which triggers it is roughly -- run qt5 application which
> > uses eglfs platform and etnaviv, stop the application, sleep for 15
> > minutes, run the application again. This leads to a timeout waiting
> > for vsync, because the LTDC has suspended, but did not resume.
> >
> > Fixes: 35ab6cfbf211 ("drm/stm: support runtime power management")
> > Signed-off-by: Marek Vasut <marex@denx.de>
> > Cc: Yannick Fertré <yannick.fertre@st.com>
> > Cc: Philippe Cornu <philippe.cornu@st.com>
> > Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> > Cc: Vincent Abriou <vincent.abriou@st.com>
> > Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> > Cc: Alexandre Torgue <alexandre.torgue@st.com>
> > To: dri-devel@lists.freedesktop.org
> > Cc: linux-stm32@st-md-mailman.stormreply.com
> > Cc: linux-arm-kernel@lists.infradead.org
> > ---
> > ------------[ cut here ]------------
> > WARNING: CPU: 0 PID: 297 at drivers/gpu/drm/drm_atomic_helper.c:1494 drm_atomic_helper_wait_for_vblanks+0x1dc/0x200
> > [CRTC:35:crtc-0] vblank wait timed out
> > Modules linked in:
> > CPU: 0 PID: 297 Comm: QSGRenderThread Not tainted 5.6.0-rc3-next-20200228-00010-g318bf0fc08ef #2
> > Hardware name: STM32 (Device Tree Support)
> > [<c010f18c>] (unwind_backtrace) from [<c010afb8>] (show_stack+0x10/0x14)
> > [<c010afb8>] (show_stack) from [<c07b1d3c>] (dump_stack+0xb4/0xd0)
> > [<c07b1d3c>] (dump_stack) from [<c011d8b8>] (__warn+0xd4/0xf0)
> > [<c011d8b8>] (__warn) from [<c011dc4c>] (warn_slowpath_fmt+0x78/0xa8)
> > [<c011dc4c>] (warn_slowpath_fmt) from [<c04a266c>] (drm_atomic_helper_wait_for_vblanks+0x1dc/0x200)
> > [<c04a266c>] (drm_atomic_helper_wait_for_vblanks) from [<c04a510c>] (drm_atomic_helper_commit_tail+0
> > x50/0x60)
> > [<c04a510c>] (drm_atomic_helper_commit_tail) from [<c04a52a8>] (commit_tail+0x12c/0x13c)
> > [<c04a52a8>] (commit_tail) from [<c04a53b4>] (drm_atomic_helper_commit+0xf4/0x100)
> > [<c04a53b4>] (drm_atomic_helper_commit) from [<c04a2d38>] (drm_atomic_helper_set_config+0x58/0x6c)
> > [<c04a2d38>] (drm_atomic_helper_set_config) from [<c04b1994>] (drm_mode_setcrtc+0x450/0x550)
> > [<c04b1994>] (drm_mode_setcrtc) from [<c04ad570>] (drm_ioctl_kernel+0x90/0xe8)
> > [<c04ad570>] (drm_ioctl_kernel) from [<c04ad8ac>] (drm_ioctl+0x2e4/0x32c)
> > [<c04ad8ac>] (drm_ioctl) from [<c0246784>] (vfs_ioctl+0x20/0x38)
> > [<c0246784>] (vfs_ioctl) from [<c02470f0>] (ksys_ioctl+0xbc/0x7b0)
> > [<c02470f0>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54)
> > Exception stack(0xee8f3fa8 to 0xee8f3ff0)
> > 3fa0: 00000005 adcbeb18 00000005 c06864a2 adcbeb18 00000001
> > 3fc0: 00000005 adcbeb18 c06864a2 00000036 00000029 00000023 00000023 00000007
> > 3fe0: b113b098 adcbeafc b1125413 b6155cf8
> > ---[ end trace 2ad5ba954ceb767a ]---
> > ---
> > drivers/gpu/drm/stm/ltdc.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> > index 99bf93e8b36f..301de0498078 100644
> > --- a/drivers/gpu/drm/stm/ltdc.c
> > +++ b/drivers/gpu/drm/stm/ltdc.c
> > @@ -425,9 +425,12 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
> > struct drm_crtc_state *old_state)
> > {
> > struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> > + struct drm_device *ddev = crtc->dev;
> >
> > DRM_DEBUG_DRIVER("\n");
> >
> > + pm_runtime_get_sync(ddev->dev);
> > +
> > /* Sets the background color value */
> > reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
> >
> >
> Hi Marek,
> Many thanks for your patch,
> Acked-by: Philippe Cornu <philippe.cornu@st.com>
> Tested-by: Yannick Fertre <yannick.fertre@st.com>
>
>
> Hi Benjamin,
> Could you please apply "drm/stm: ltdc: remove call of pm-runtime
> functions" **before** this one. Thank you.
Applied on drm-misc-next.
Thanks,
Benjamin
>
> Philippe :-)
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2020-02-29 22:16 [PATCH] drm/stm: repair runtime power management Marek Vasut
2020-03-09 10:35 ` Yannick FERTRE
2020-03-09 11:57 ` Marek Vasut
2020-07-01 12:14 ` Yannick FERTRE
2020-07-02 10:07 ` Philippe CORNU
2020-07-02 10:53 ` Marek Vasut
2020-07-02 12:31 ` Philippe CORNU
2020-07-08 9:49 ` Benjamin Gaignard
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