[1/8] drm/atomic-helper: reset vblank on crtc reset
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Message ID 20200612160056.2082681-1-daniel.vetter@ffwll.ch
State New
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Series
  • [1/8] drm/atomic-helper: reset vblank on crtc reset
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Commit Message

Daniel Vetter June 12, 2020, 4 p.m. UTC
Only when vblanks are supported ofc.

Some drivers do this already, but most unfortunately missed it. This
opens up bugs after driver load, before the crtc is enabled for the
first time. syzbot spotted this when loading vkms as a secondary
output. Given how many drivers are buggy it's best to solve this once
and for all in shared helper code.

Aside from moving the few existing calls to drm_crtc_vblank_reset into
helpers (i915 doesn't use helpers, so keeps its own) I think the
regression risk is minimal: atomic helpers already rely on drivers
calling drm_crtc_vblank_on/off correctly in their hooks when they
support vblanks. And driver that's failing to handle vblanks after
this is missing those calls already, and vblanks could only work by
accident when enabling a CRTC for the first time right after boot.

Big thanks to Tetsuo for helping track down what's going wrong here.

There's only a few drivers which already had the necessary call and
needed some updating:
- komeda, atmel and tidss also needed to be changed to call
  __drm_atomic_helper_crtc_reset() intead of open coding it
- tegra and msm even had it in the same place already, just code
  motion, and malidp already uses __drm_atomic_helper_crtc_reset().

Only call left is in i915, which doesn't use drm_mode_config_reset,
but has its own fastboot infrastructure. So that's the only case where
we actually want this in the driver still.

I've also reviewed all other drivers which set up vblank support with
drm_vblank_init. After the previous patch fixing mxsfb all atomic
drivers do call drm_crtc_vblank_on/off as they should, the remaining
drivers are either legacy kms or legacy dri1 drivers, so not affected
by this change to atomic helpers.

v2: Use the drm_dev_has_vblank() helper.

v3: Laurent pointed out that omap and rcar-du used drm_crtc_vblank_off
instead of drm_crtc_vblank_reset. Adjust them too.

v4: Laurent noticed that rcar-du and omap open-code their crtc reset
and hence would actually be broken by this patch now. So fix them up
by reusing the helpers, which brings the drm_crtc_vblank_reset() back.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://syzkaller.appspot.com/bug?id=0ba17d70d062b2595e1f061231474800f076c7cb
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot+0871b14ca2e2fb64f6e3@syzkaller.appspotmail.com
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: "James (Qian) Wang" <james.qian.wang@arm.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mihail Atanassov <mihail.atanassov@arm.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Jyri Sarha <jsarha@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Brian Masney <masneyb@onstation.org>
Cc: Emil Velikov <emil.velikov@collabora.com>
Cc: zhengbin <zhengbin13@huawei.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-tegra@vger.kernel.org
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 7 ++-----
 drivers/gpu/drm/arm/malidp_drv.c                 | 1 -
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c   | 7 ++-----
 drivers/gpu/drm/drm_atomic_state_helper.c        | 4 ++++
 drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c        | 2 --
 drivers/gpu/drm/omapdrm/omap_crtc.c              | 8 +++++---
 drivers/gpu/drm/omapdrm/omap_drv.c               | 4 ----
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c           | 6 +-----
 drivers/gpu/drm/tegra/dc.c                       | 1 -
 drivers/gpu/drm/tidss/tidss_crtc.c               | 3 +--
 drivers/gpu/drm/tidss/tidss_kms.c                | 4 ----
 11 files changed, 15 insertions(+), 32 deletions(-)

Comments

Maxime Ripard June 24, 2020, 9:42 a.m. UTC | #1
On Fri, Jun 12, 2020 at 06:00:49PM +0200, Daniel Vetter wrote:
> Only when vblanks are supported ofc.
> 
> Some drivers do this already, but most unfortunately missed it. This
> opens up bugs after driver load, before the crtc is enabled for the
> first time. syzbot spotted this when loading vkms as a secondary
> output. Given how many drivers are buggy it's best to solve this once
> and for all in shared helper code.
> 
> Aside from moving the few existing calls to drm_crtc_vblank_reset into
> helpers (i915 doesn't use helpers, so keeps its own) I think the
> regression risk is minimal: atomic helpers already rely on drivers
> calling drm_crtc_vblank_on/off correctly in their hooks when they
> support vblanks. And driver that's failing to handle vblanks after
> this is missing those calls already, and vblanks could only work by
> accident when enabling a CRTC for the first time right after boot.
> 
> Big thanks to Tetsuo for helping track down what's going wrong here.
> 
> There's only a few drivers which already had the necessary call and
> needed some updating:
> - komeda, atmel and tidss also needed to be changed to call
>   __drm_atomic_helper_crtc_reset() intead of open coding it
> - tegra and msm even had it in the same place already, just code
>   motion, and malidp already uses __drm_atomic_helper_crtc_reset().
> 
> Only call left is in i915, which doesn't use drm_mode_config_reset,
> but has its own fastboot infrastructure. So that's the only case where
> we actually want this in the driver still.
> 
> I've also reviewed all other drivers which set up vblank support with
> drm_vblank_init. After the previous patch fixing mxsfb all atomic
> drivers do call drm_crtc_vblank_on/off as they should, the remaining
> drivers are either legacy kms or legacy dri1 drivers, so not affected
> by this change to atomic helpers.
> 
> v2: Use the drm_dev_has_vblank() helper.
> 
> v3: Laurent pointed out that omap and rcar-du used drm_crtc_vblank_off
> instead of drm_crtc_vblank_reset. Adjust them too.
> 
> v4: Laurent noticed that rcar-du and omap open-code their crtc reset
> and hence would actually be broken by this patch now. So fix them up
> by reusing the helpers, which brings the drm_crtc_vblank_reset() back.
> 
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> Acked-by: Liviu Dudau <liviu.dudau@arm.com>
> Acked-by: Thierry Reding <treding@nvidia.com>
> Link: https://syzkaller.appspot.com/bug?id=0ba17d70d062b2595e1f061231474800f076c7cb
> Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> Reported-by: syzbot+0871b14ca2e2fb64f6e3@syzkaller.appspotmail.com
> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> Cc: "James (Qian) Wang" <james.qian.wang@arm.com>
> Cc: Liviu Dudau <liviu.dudau@arm.com>
> Cc: Mihail Atanassov <mihail.atanassov@arm.com>
> Cc: Brian Starkey <brian.starkey@arm.com>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Boris Brezillon <bbrezillon@kernel.org>
> Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
> Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Maxime Ripard <mripard@kernel.org>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Jonathan Hunter <jonathanh@nvidia.com>
> Cc: Jyri Sarha <jsarha@ti.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Cc: Rob Clark <robdclark@gmail.com>
> Cc: Sean Paul <seanpaul@chromium.org>
> Cc: Brian Masney <masneyb@onstation.org>
> Cc: Emil Velikov <emil.velikov@collabora.com>
> Cc: zhengbin <zhengbin13@huawei.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: linux-tegra@vger.kernel.org
> Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-renesas-soc@vger.kernel.org
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

Acked-by: Maxime Ripard <mripard@kernel.org>

Maxime
Laurent Pinchart July 2, 2020, 11:27 a.m. UTC | #2
Hi Daniel,

Thank you for the patch.

On Fri, Jun 12, 2020 at 06:00:49PM +0200, Daniel Vetter wrote:
> Only when vblanks are supported ofc.
> 
> Some drivers do this already, but most unfortunately missed it. This
> opens up bugs after driver load, before the crtc is enabled for the
> first time. syzbot spotted this when loading vkms as a secondary
> output. Given how many drivers are buggy it's best to solve this once
> and for all in shared helper code.
> 
> Aside from moving the few existing calls to drm_crtc_vblank_reset into
> helpers (i915 doesn't use helpers, so keeps its own) I think the
> regression risk is minimal: atomic helpers already rely on drivers
> calling drm_crtc_vblank_on/off correctly in their hooks when they
> support vblanks. And driver that's failing to handle vblanks after
> this is missing those calls already, and vblanks could only work by
> accident when enabling a CRTC for the first time right after boot.
> 
> Big thanks to Tetsuo for helping track down what's going wrong here.
> 
> There's only a few drivers which already had the necessary call and
> needed some updating:
> - komeda, atmel and tidss also needed to be changed to call
>   __drm_atomic_helper_crtc_reset() intead of open coding it
> - tegra and msm even had it in the same place already, just code
>   motion, and malidp already uses __drm_atomic_helper_crtc_reset().

Should you mention rcar-du and omapdrm here ?

> Only call left is in i915, which doesn't use drm_mode_config_reset,
> but has its own fastboot infrastructure. So that's the only case where
> we actually want this in the driver still.
> 
> I've also reviewed all other drivers which set up vblank support with
> drm_vblank_init. After the previous patch fixing mxsfb all atomic
> drivers do call drm_crtc_vblank_on/off as they should, the remaining
> drivers are either legacy kms or legacy dri1 drivers, so not affected
> by this change to atomic helpers.
> 
> v2: Use the drm_dev_has_vblank() helper.
> 
> v3: Laurent pointed out that omap and rcar-du used drm_crtc_vblank_off
> instead of drm_crtc_vblank_reset. Adjust them too.
> 
> v4: Laurent noticed that rcar-du and omap open-code their crtc reset
> and hence would actually be broken by this patch now. So fix them up
> by reusing the helpers, which brings the drm_crtc_vblank_reset() back.
> 
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> Acked-by: Liviu Dudau <liviu.dudau@arm.com>
> Acked-by: Thierry Reding <treding@nvidia.com>
> Link: https://syzkaller.appspot.com/bug?id=0ba17d70d062b2595e1f061231474800f076c7cb
> Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> Reported-by: syzbot+0871b14ca2e2fb64f6e3@syzkaller.appspotmail.com
> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> Cc: "James (Qian) Wang" <james.qian.wang@arm.com>
> Cc: Liviu Dudau <liviu.dudau@arm.com>
> Cc: Mihail Atanassov <mihail.atanassov@arm.com>
> Cc: Brian Starkey <brian.starkey@arm.com>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Boris Brezillon <bbrezillon@kernel.org>
> Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
> Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Maxime Ripard <mripard@kernel.org>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Jonathan Hunter <jonathanh@nvidia.com>
> Cc: Jyri Sarha <jsarha@ti.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Cc: Rob Clark <robdclark@gmail.com>
> Cc: Sean Paul <seanpaul@chromium.org>
> Cc: Brian Masney <masneyb@onstation.org>
> Cc: Emil Velikov <emil.velikov@collabora.com>
> Cc: zhengbin <zhengbin13@huawei.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: linux-tegra@vger.kernel.org
> Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-renesas-soc@vger.kernel.org
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> ---
>  drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 7 ++-----
>  drivers/gpu/drm/arm/malidp_drv.c                 | 1 -
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c   | 7 ++-----
>  drivers/gpu/drm/drm_atomic_state_helper.c        | 4 ++++
>  drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c        | 2 --
>  drivers/gpu/drm/omapdrm/omap_crtc.c              | 8 +++++---
>  drivers/gpu/drm/omapdrm/omap_drv.c               | 4 ----
>  drivers/gpu/drm/rcar-du/rcar_du_crtc.c           | 6 +-----
>  drivers/gpu/drm/tegra/dc.c                       | 1 -
>  drivers/gpu/drm/tidss/tidss_crtc.c               | 3 +--
>  drivers/gpu/drm/tidss/tidss_kms.c                | 4 ----
>  11 files changed, 15 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> index 56bd938961ee..f33418d6e1a0 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> @@ -492,10 +492,8 @@ static void komeda_crtc_reset(struct drm_crtc *crtc)
>  	crtc->state = NULL;
>  
>  	state = kzalloc(sizeof(*state), GFP_KERNEL);
> -	if (state) {
> -		crtc->state = &state->base;
> -		crtc->state->crtc = crtc;
> -	}
> +	if (state)
> +		__drm_atomic_helper_crtc_reset(crtc, &state->base);
>  }
>  
>  static struct drm_crtc_state *
> @@ -616,7 +614,6 @@ static int komeda_crtc_add(struct komeda_kms_dev *kms,
>  		return err;
>  
>  	drm_crtc_helper_add(crtc, &komeda_crtc_helper_funcs);
> -	drm_crtc_vblank_reset(crtc);
>  
>  	crtc->port = kcrtc->master->of_output_port;
>  
> diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> index 6feda7cb37a6..c9e1ee84b4e8 100644
> --- a/drivers/gpu/drm/arm/malidp_drv.c
> +++ b/drivers/gpu/drm/arm/malidp_drv.c
> @@ -861,7 +861,6 @@ static int malidp_bind(struct device *dev)
>  	drm->irq_enabled = true;
>  
>  	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
> -	drm_crtc_vblank_reset(&malidp->crtc);
>  	if (ret < 0) {
>  		DRM_ERROR("failed to initialise vblank\n");
>  		goto vblank_fail;
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> index 10985134ce0b..ce246b96330b 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> @@ -411,10 +411,8 @@ static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
>  	}
>  
>  	state = kzalloc(sizeof(*state), GFP_KERNEL);
> -	if (state) {
> -		crtc->state = &state->base;
> -		crtc->state->crtc = crtc;
> -	}
> +	if (state)
> +		__drm_atomic_helper_crtc_reset(crtc, &state->base);
>  }
>  
>  static struct drm_crtc_state *
> @@ -528,7 +526,6 @@ int atmel_hlcdc_crtc_create(struct drm_device *dev)
>  	}
>  
>  	drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs);
> -	drm_crtc_vblank_reset(&crtc->base);
>  
>  	drm_mode_crtc_set_gamma_size(&crtc->base, ATMEL_HLCDC_CLUT_SIZE);
>  	drm_crtc_enable_color_mgmt(&crtc->base, 0, false,
> diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> index 8fce6a115dfe..9ad74045158e 100644
> --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> @@ -32,6 +32,7 @@
>  #include <drm/drm_device.h>
>  #include <drm/drm_plane.h>
>  #include <drm/drm_print.h>
> +#include <drm/drm_vblank.h>
>  #include <drm/drm_writeback.h>
>  
>  #include <linux/slab.h>
> @@ -93,6 +94,9 @@ __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
>  	if (crtc_state)
>  		__drm_atomic_helper_crtc_state_reset(crtc_state, crtc);
>  
> +	if (drm_dev_has_vblank(crtc->dev))
> +		drm_crtc_vblank_reset(crtc);
> +
>  	crtc->state = crtc_state;
>  }
>  EXPORT_SYMBOL(__drm_atomic_helper_crtc_reset);
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> index e152016a6a7d..c39dad151bb6 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> @@ -1117,8 +1117,6 @@ static void mdp5_crtc_reset(struct drm_crtc *crtc)
>  		mdp5_crtc_destroy_state(crtc, crtc->state);
>  
>  	__drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
> -
> -	drm_crtc_vblank_reset(crtc);
>  }
>  
>  static const struct drm_crtc_funcs mdp5_crtc_funcs = {
> diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> index fce7e944a280..6d40914675da 100644
> --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> @@ -697,14 +697,16 @@ static int omap_crtc_atomic_get_property(struct drm_crtc *crtc,
>  
>  static void omap_crtc_reset(struct drm_crtc *crtc)
>  {
> +	struct omap_crtc_state *state;
> +
>  	if (crtc->state)
>  		__drm_atomic_helper_crtc_destroy_state(crtc->state);
>  
>  	kfree(crtc->state);
> -	crtc->state = kzalloc(sizeof(struct omap_crtc_state), GFP_KERNEL);
>  
> -	if (crtc->state)
> -		crtc->state->crtc = crtc;
> +	state = kzalloc(sizeof(*state), GFP_KERNEL);
> +	if (state)
> +		__drm_atomic_helper_crtc_reset(crtc, &state->base);
>  }
>  
>  static struct drm_crtc_state *
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index 242d28281784..4526967978b7 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -595,7 +595,6 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
>  {
>  	const struct soc_device_attribute *soc;
>  	struct drm_device *ddev;
> -	unsigned int i;
>  	int ret;
>  
>  	DBG("%s", dev_name(dev));
> @@ -642,9 +641,6 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
>  		goto err_cleanup_modeset;
>  	}
>  
> -	for (i = 0; i < priv->num_pipes; i++)
> -		drm_crtc_vblank_off(priv->pipes[i].crtc);
> -
>  	omap_fbdev_init(ddev);
>  
>  	drm_kms_helper_poll_init(ddev);
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> index d73e88ddecd0..fe86a3e67757 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> @@ -975,8 +975,7 @@ static void rcar_du_crtc_reset(struct drm_crtc *crtc)
>  	state->crc.source = VSP1_DU_CRC_NONE;
>  	state->crc.index = 0;
>  
> -	crtc->state = &state->state;
> -	crtc->state->crtc = crtc;
> +	__drm_atomic_helper_crtc_reset(crtc, &state->state);
>  }
>  
>  static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
> @@ -1271,9 +1270,6 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
>  
>  	drm_crtc_helper_add(crtc, &crtc_helper_funcs);
>  
> -	/* Start with vertical blanking interrupt reporting disabled. */
> -	drm_crtc_vblank_off(crtc);
> -

Could this cause an issue, as the interrupt handler can now be
registered with the interrupt left enabled in the hardware after a
reboot, while drm_crtc_vblank_off() would disable it ? It's something
that should likely be handled elsewhere in the driver, with all
interrupts disabled explicitly early in probe, and I don't think the
driver handles enabled interrupts very well today, so it's not a blocker
for me:

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

I would however appreciate your thoughts on this topic, to know if my
understanding is correct (and if this issue could affect other drivers).

>  	/* Register the interrupt handler. */
>  	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) {
>  		/* The IRQ's are associated with the CRTC (sw)index. */
> diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
> index 83f31c6e891c..9b308b572eac 100644
> --- a/drivers/gpu/drm/tegra/dc.c
> +++ b/drivers/gpu/drm/tegra/dc.c
> @@ -1168,7 +1168,6 @@ static void tegra_crtc_reset(struct drm_crtc *crtc)
>  		tegra_crtc_atomic_destroy_state(crtc, crtc->state);
>  
>  	__drm_atomic_helper_crtc_reset(crtc, &state->base);
> -	drm_crtc_vblank_reset(crtc);
>  }
>  
>  static struct drm_crtc_state *
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
> index 89a226912de8..4d01c4af61cd 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.c
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.c
> @@ -352,8 +352,7 @@ static void tidss_crtc_reset(struct drm_crtc *crtc)
>  		return;
>  	}
>  
> -	crtc->state = &tcrtc->base;
> -	crtc->state->crtc = crtc;
> +	__drm_atomic_helper_crtc_reset(crtc, &tcrtc->base);
>  }
>  
>  static struct drm_crtc_state *tidss_crtc_duplicate_state(struct drm_crtc *crtc)
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
> index 4b99e9fa84a5..e6ab59eed259 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.c
> +++ b/drivers/gpu/drm/tidss/tidss_kms.c
> @@ -278,10 +278,6 @@ int tidss_modeset_init(struct tidss_device *tidss)
>  	if (ret)
>  		return ret;
>  
> -	/* Start with vertical blanking interrupt reporting disabled. */
> -	for (i = 0; i < tidss->num_crtcs; ++i)
> -		drm_crtc_vblank_reset(tidss->crtcs[i]);
> -
>  	drm_mode_config_reset(ddev);
>  
>  	dev_dbg(tidss->dev, "%s done\n", __func__);
Daniel Vetter July 2, 2020, 11:40 a.m. UTC | #3
On Thu, Jul 2, 2020 at 1:27 PM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
>
> Hi Daniel,
>
> Thank you for the patch.
>
> On Fri, Jun 12, 2020 at 06:00:49PM +0200, Daniel Vetter wrote:
> > Only when vblanks are supported ofc.
> >
> > Some drivers do this already, but most unfortunately missed it. This
> > opens up bugs after driver load, before the crtc is enabled for the
> > first time. syzbot spotted this when loading vkms as a secondary
> > output. Given how many drivers are buggy it's best to solve this once
> > and for all in shared helper code.
> >
> > Aside from moving the few existing calls to drm_crtc_vblank_reset into
> > helpers (i915 doesn't use helpers, so keeps its own) I think the
> > regression risk is minimal: atomic helpers already rely on drivers
> > calling drm_crtc_vblank_on/off correctly in their hooks when they
> > support vblanks. And driver that's failing to handle vblanks after
> > this is missing those calls already, and vblanks could only work by
> > accident when enabling a CRTC for the first time right after boot.
> >
> > Big thanks to Tetsuo for helping track down what's going wrong here.
> >
> > There's only a few drivers which already had the necessary call and
> > needed some updating:
> > - komeda, atmel and tidss also needed to be changed to call
> >   __drm_atomic_helper_crtc_reset() intead of open coding it
> > - tegra and msm even had it in the same place already, just code
> >   motion, and malidp already uses __drm_atomic_helper_crtc_reset().
>
> Should you mention rcar-du and omapdrm here ?

Uh yes need to mention them too here, and how exactly they're a bit
different. Will shuffle that from the v4: block below when applying.

> > Only call left is in i915, which doesn't use drm_mode_config_reset,
> > but has its own fastboot infrastructure. So that's the only case where
> > we actually want this in the driver still.
> >
> > I've also reviewed all other drivers which set up vblank support with
> > drm_vblank_init. After the previous patch fixing mxsfb all atomic
> > drivers do call drm_crtc_vblank_on/off as they should, the remaining
> > drivers are either legacy kms or legacy dri1 drivers, so not affected
> > by this change to atomic helpers.
> >
> > v2: Use the drm_dev_has_vblank() helper.
> >
> > v3: Laurent pointed out that omap and rcar-du used drm_crtc_vblank_off
> > instead of drm_crtc_vblank_reset. Adjust them too.
> >
> > v4: Laurent noticed that rcar-du and omap open-code their crtc reset
> > and hence would actually be broken by this patch now. So fix them up
> > by reusing the helpers, which brings the drm_crtc_vblank_reset() back.
> >
> > Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> > Acked-by: Liviu Dudau <liviu.dudau@arm.com>
> > Acked-by: Thierry Reding <treding@nvidia.com>
> > Link: https://syzkaller.appspot.com/bug?id=0ba17d70d062b2595e1f061231474800f076c7cb
> > Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> > Reported-by: syzbot+0871b14ca2e2fb64f6e3@syzkaller.appspotmail.com
> > Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> > Cc: "James (Qian) Wang" <james.qian.wang@arm.com>
> > Cc: Liviu Dudau <liviu.dudau@arm.com>
> > Cc: Mihail Atanassov <mihail.atanassov@arm.com>
> > Cc: Brian Starkey <brian.starkey@arm.com>
> > Cc: Sam Ravnborg <sam@ravnborg.org>
> > Cc: Boris Brezillon <bbrezillon@kernel.org>
> > Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
> > Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
> > Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
> > Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > Cc: Maxime Ripard <mripard@kernel.org>
> > Cc: Thomas Zimmermann <tzimmermann@suse.de>
> > Cc: David Airlie <airlied@linux.ie>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > Cc: Thierry Reding <thierry.reding@gmail.com>
> > Cc: Jonathan Hunter <jonathanh@nvidia.com>
> > Cc: Jyri Sarha <jsarha@ti.com>
> > Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> > Cc: Rob Clark <robdclark@gmail.com>
> > Cc: Sean Paul <seanpaul@chromium.org>
> > Cc: Brian Masney <masneyb@onstation.org>
> > Cc: Emil Velikov <emil.velikov@collabora.com>
> > Cc: zhengbin <zhengbin13@huawei.com>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Cc: linux-tegra@vger.kernel.org
> > Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > Cc: linux-arm-kernel@lists.infradead.org
> > Cc: linux-renesas-soc@vger.kernel.org
> > Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> > ---
> >  drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 7 ++-----
> >  drivers/gpu/drm/arm/malidp_drv.c                 | 1 -
> >  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c   | 7 ++-----
> >  drivers/gpu/drm/drm_atomic_state_helper.c        | 4 ++++
> >  drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c        | 2 --
> >  drivers/gpu/drm/omapdrm/omap_crtc.c              | 8 +++++---
> >  drivers/gpu/drm/omapdrm/omap_drv.c               | 4 ----
> >  drivers/gpu/drm/rcar-du/rcar_du_crtc.c           | 6 +-----
> >  drivers/gpu/drm/tegra/dc.c                       | 1 -
> >  drivers/gpu/drm/tidss/tidss_crtc.c               | 3 +--
> >  drivers/gpu/drm/tidss/tidss_kms.c                | 4 ----
> >  11 files changed, 15 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> > index 56bd938961ee..f33418d6e1a0 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> > @@ -492,10 +492,8 @@ static void komeda_crtc_reset(struct drm_crtc *crtc)
> >       crtc->state = NULL;
> >
> >       state = kzalloc(sizeof(*state), GFP_KERNEL);
> > -     if (state) {
> > -             crtc->state = &state->base;
> > -             crtc->state->crtc = crtc;
> > -     }
> > +     if (state)
> > +             __drm_atomic_helper_crtc_reset(crtc, &state->base);
> >  }
> >
> >  static struct drm_crtc_state *
> > @@ -616,7 +614,6 @@ static int komeda_crtc_add(struct komeda_kms_dev *kms,
> >               return err;
> >
> >       drm_crtc_helper_add(crtc, &komeda_crtc_helper_funcs);
> > -     drm_crtc_vblank_reset(crtc);
> >
> >       crtc->port = kcrtc->master->of_output_port;
> >
> > diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> > index 6feda7cb37a6..c9e1ee84b4e8 100644
> > --- a/drivers/gpu/drm/arm/malidp_drv.c
> > +++ b/drivers/gpu/drm/arm/malidp_drv.c
> > @@ -861,7 +861,6 @@ static int malidp_bind(struct device *dev)
> >       drm->irq_enabled = true;
> >
> >       ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
> > -     drm_crtc_vblank_reset(&malidp->crtc);
> >       if (ret < 0) {
> >               DRM_ERROR("failed to initialise vblank\n");
> >               goto vblank_fail;
> > diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> > index 10985134ce0b..ce246b96330b 100644
> > --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> > +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> > @@ -411,10 +411,8 @@ static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
> >       }
> >
> >       state = kzalloc(sizeof(*state), GFP_KERNEL);
> > -     if (state) {
> > -             crtc->state = &state->base;
> > -             crtc->state->crtc = crtc;
> > -     }
> > +     if (state)
> > +             __drm_atomic_helper_crtc_reset(crtc, &state->base);
> >  }
> >
> >  static struct drm_crtc_state *
> > @@ -528,7 +526,6 @@ int atmel_hlcdc_crtc_create(struct drm_device *dev)
> >       }
> >
> >       drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs);
> > -     drm_crtc_vblank_reset(&crtc->base);
> >
> >       drm_mode_crtc_set_gamma_size(&crtc->base, ATMEL_HLCDC_CLUT_SIZE);
> >       drm_crtc_enable_color_mgmt(&crtc->base, 0, false,
> > diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> > index 8fce6a115dfe..9ad74045158e 100644
> > --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> > +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> > @@ -32,6 +32,7 @@
> >  #include <drm/drm_device.h>
> >  #include <drm/drm_plane.h>
> >  #include <drm/drm_print.h>
> > +#include <drm/drm_vblank.h>
> >  #include <drm/drm_writeback.h>
> >
> >  #include <linux/slab.h>
> > @@ -93,6 +94,9 @@ __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
> >       if (crtc_state)
> >               __drm_atomic_helper_crtc_state_reset(crtc_state, crtc);
> >
> > +     if (drm_dev_has_vblank(crtc->dev))
> > +             drm_crtc_vblank_reset(crtc);
> > +
> >       crtc->state = crtc_state;
> >  }
> >  EXPORT_SYMBOL(__drm_atomic_helper_crtc_reset);
> > diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> > index e152016a6a7d..c39dad151bb6 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> > @@ -1117,8 +1117,6 @@ static void mdp5_crtc_reset(struct drm_crtc *crtc)
> >               mdp5_crtc_destroy_state(crtc, crtc->state);
> >
> >       __drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
> > -
> > -     drm_crtc_vblank_reset(crtc);
> >  }
> >
> >  static const struct drm_crtc_funcs mdp5_crtc_funcs = {
> > diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> > index fce7e944a280..6d40914675da 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> > @@ -697,14 +697,16 @@ static int omap_crtc_atomic_get_property(struct drm_crtc *crtc,
> >
> >  static void omap_crtc_reset(struct drm_crtc *crtc)
> >  {
> > +     struct omap_crtc_state *state;
> > +
> >       if (crtc->state)
> >               __drm_atomic_helper_crtc_destroy_state(crtc->state);
> >
> >       kfree(crtc->state);
> > -     crtc->state = kzalloc(sizeof(struct omap_crtc_state), GFP_KERNEL);
> >
> > -     if (crtc->state)
> > -             crtc->state->crtc = crtc;
> > +     state = kzalloc(sizeof(*state), GFP_KERNEL);
> > +     if (state)
> > +             __drm_atomic_helper_crtc_reset(crtc, &state->base);
> >  }
> >
> >  static struct drm_crtc_state *
> > diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> > index 242d28281784..4526967978b7 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> > @@ -595,7 +595,6 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
> >  {
> >       const struct soc_device_attribute *soc;
> >       struct drm_device *ddev;
> > -     unsigned int i;
> >       int ret;
> >
> >       DBG("%s", dev_name(dev));
> > @@ -642,9 +641,6 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
> >               goto err_cleanup_modeset;
> >       }
> >
> > -     for (i = 0; i < priv->num_pipes; i++)
> > -             drm_crtc_vblank_off(priv->pipes[i].crtc);
> > -
> >       omap_fbdev_init(ddev);
> >
> >       drm_kms_helper_poll_init(ddev);
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> > index d73e88ddecd0..fe86a3e67757 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> > @@ -975,8 +975,7 @@ static void rcar_du_crtc_reset(struct drm_crtc *crtc)
> >       state->crc.source = VSP1_DU_CRC_NONE;
> >       state->crc.index = 0;
> >
> > -     crtc->state = &state->state;
> > -     crtc->state->crtc = crtc;
> > +     __drm_atomic_helper_crtc_reset(crtc, &state->state);
> >  }
> >
> >  static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
> > @@ -1271,9 +1270,6 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
> >
> >       drm_crtc_helper_add(crtc, &crtc_helper_funcs);
> >
> > -     /* Start with vertical blanking interrupt reporting disabled. */
> > -     drm_crtc_vblank_off(crtc);
> > -
>
> Could this cause an issue, as the interrupt handler can now be
> registered with the interrupt left enabled in the hardware after a
> reboot, while drm_crtc_vblank_off() would disable it ? It's something
> that should likely be handled elsewhere in the driver, with all
> interrupts disabled explicitly early in probe, and I don't think the
> driver handles enabled interrupts very well today, so it's not a blocker
> for me:

Atomic helpers, specifically the reset helpers I'm adjusting here
assume that at driver load time everything is completely off. They
_only_ reset the sw state.

If you want to have more smooth takeover (flicker-free boot eventually
even), or have some hw that's not getting reset as part of power-up or
driver load, then that would be for the driver to handle. I think we
recently had a discussion about what would need to be added to make
atomic helpers support take-over of actual hw state at driver load.
And yes if that's the case, then you'd need a different flow here to
make sure vblank state is matching crtc state (e.g. i915 does that).

Wrt this case here specifically drm_handle_vblank needs to handle
races anyway, so it's robust against being called when the vblanks are
disabled in software. So I don't think you'll have any serious problem
here.

Actual hw irq enable/disable is only done around drm_vblank_get/put
(well with some delay), so I don't think that would have changed
anything for you wrt actually getting an interrupt or not.

So tldr; I think just drm_vblank_reset here fits the best with overall
helpers we have.

> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>
> I would however appreciate your thoughts on this topic, to know if my
> understanding is correct (and if this issue could affect other drivers).

Thanks a lot for your review, I'll apply the entire bunch later today.
-Daniel

>
> >       /* Register the interrupt handler. */
> >       if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) {
> >               /* The IRQ's are associated with the CRTC (sw)index. */
> > diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
> > index 83f31c6e891c..9b308b572eac 100644
> > --- a/drivers/gpu/drm/tegra/dc.c
> > +++ b/drivers/gpu/drm/tegra/dc.c
> > @@ -1168,7 +1168,6 @@ static void tegra_crtc_reset(struct drm_crtc *crtc)
> >               tegra_crtc_atomic_destroy_state(crtc, crtc->state);
> >
> >       __drm_atomic_helper_crtc_reset(crtc, &state->base);
> > -     drm_crtc_vblank_reset(crtc);
> >  }
> >
> >  static struct drm_crtc_state *
> > diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
> > index 89a226912de8..4d01c4af61cd 100644
> > --- a/drivers/gpu/drm/tidss/tidss_crtc.c
> > +++ b/drivers/gpu/drm/tidss/tidss_crtc.c
> > @@ -352,8 +352,7 @@ static void tidss_crtc_reset(struct drm_crtc *crtc)
> >               return;
> >       }
> >
> > -     crtc->state = &tcrtc->base;
> > -     crtc->state->crtc = crtc;
> > +     __drm_atomic_helper_crtc_reset(crtc, &tcrtc->base);
> >  }
> >
> >  static struct drm_crtc_state *tidss_crtc_duplicate_state(struct drm_crtc *crtc)
> > diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
> > index 4b99e9fa84a5..e6ab59eed259 100644
> > --- a/drivers/gpu/drm/tidss/tidss_kms.c
> > +++ b/drivers/gpu/drm/tidss/tidss_kms.c
> > @@ -278,10 +278,6 @@ int tidss_modeset_init(struct tidss_device *tidss)
> >       if (ret)
> >               return ret;
> >
> > -     /* Start with vertical blanking interrupt reporting disabled. */
> > -     for (i = 0; i < tidss->num_crtcs; ++i)
> > -             drm_crtc_vblank_reset(tidss->crtcs[i]);
> > -
> >       drm_mode_config_reset(ddev);
> >
> >       dev_dbg(tidss->dev, "%s done\n", __func__);
>
> --
> Regards,
>
> Laurent Pinchart
Tetsuo Handa Aug. 6, 2020, 6:43 a.m. UTC | #4
As of commit 47ec5303d73ea344 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next") on linux.git ,
my VMware environment cannot boot. Do I need to bisect?

[    9.314496][    T1] vga16fb: mapped to 0x0000000071050562
[    9.467770][    T1] Console: switching to colour frame buffer device 80x30
[    9.632092][    T1] fb0: VGA16 VGA frame buffer device
[    9.651768][    T1] ACPI: AC Adapter [ACAD] (on-line)
[    9.672544][    T1] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    9.722373][    T1] ACPI: Power Button [PWRF]
[    9.744231][    T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[    9.820147][    T1] N_HDLC line discipline registered with maxframe=4096
[    9.835649][    T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    9.852567][    T1] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[   10.033372][    T1] Cyclades driver 2.6
[   10.049928][    T1] Initializing Nozomi driver 2.1d
[   10.065493][    T1] RocketPort device driver module, version 2.09, 12-June-2003
[   10.095368][    T1] No rocketport ports found; unloading driver
[   10.112430][    T1] Non-volatile memory driver v1.3
[   10.127090][    T1] Linux agpgart interface v0.103
[   10.144037][    T1] agpgart-intel 0000:00:00.0: Intel 440BX Chipset
[   10.162275][    T1] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0x0
[   10.181130][    T1] [drm] DMA map mode: Caching DMA mappings.
[   10.195150][    T1] [drm] Capabilities:
[   10.208728][    T1] [drm]   Rect copy.
[   10.222772][    T1] [drm]   Cursor.
[   10.235364][    T1] [drm]   Cursor bypass.
[   10.249121][    T1] [drm]   Cursor bypass 2.
[   10.260590][    T1] [drm]   8bit emulation.
[   10.272220][    T1] [drm]   Alpha cursor.
[   10.284670][    T1] [drm]   3D.
[   10.295051][    T1] [drm]   Extended Fifo.
[   10.305180][    T1] [drm]   Multimon.
[   10.315506][    T1] [drm]   Pitchlock.
[   10.325167][    T1] [drm]   Irq mask.
[   10.334262][    T1] [drm]   Display Topology.
[   10.343519][    T1] [drm]   GMR.
[   10.352775][    T1] [drm]   Traces.
[   10.362166][    T1] [drm]   GMR2.
[   10.370716][    T1] [drm]   Screen Object 2.
[   10.379220][    T1] [drm]   Command Buffers.
[   10.388489][    T1] [drm]   Command Buffers 2.
[   10.396055][    T1] [drm]   Guest Backed Resources.
[   10.403290][    T1] [drm]   DX Features.
[   10.409911][    T1] [drm]   HP Command Queue.
[   10.417820][    T1] [drm] Capabilities2:
[   10.424216][    T1] [drm]   Grow oTable.
[   10.430423][    T1] [drm]   IntraSurface copy.
[   10.436371][    T1] [drm] Max GMR ids is 64
[   10.442651][    T1] [drm] Max number of GMR pages is 65536
[   10.450317][    T1] [drm] Max dedicated hypervisor surface memory is 0 kiB
[   10.458809][    T1] [drm] Maximum display memory size is 262144 kiB
[   10.466330][    T1] [drm] VRAM at 0xe8000000 size is 4096 kiB
[   10.474704][    T1] [drm] MMIO at 0xfe000000 size is 256 kiB
[   10.484625][    T1] [TTM] Zone  kernel: Available graphics memory: 4030538 KiB
[   10.500730][    T1] [TTM] Zone   dma32: Available graphics memory: 2097152 KiB
[   10.516851][    T1] [TTM] Initializing pool allocator
[   10.527542][    T1] [TTM] Initializing DMA pool allocator
[   10.540197][    T1] BUG: kernel NULL pointer dereference, address: 0000000000000438
[   10.550087][    T1] #PF: supervisor read access in kernel mode
[   10.550087][    T1] #PF: error_code(0x0000) - not-present page
[   10.550087][    T1] PGD 0 P4D 0 
[   10.550087][    T1] Oops: 0000 [#1] PREEMPT SMP
[   10.550087][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.8.0+ #271
[   10.550087][    T1] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020
[   10.550087][    T1] RIP: 0010:drm_dev_has_vblank+0x9/0x20
[   10.550087][    T1] Code: 5d 41 5e 41 5f e9 e7 fa 01 ff e8 e2 fa 01 ff 45 31 e4 41 8b 5f 48 eb a7 cc cc cc cc cc cc cc cc cc 53 48 89 fb e8 c7 fa 01 ff <8b> 83 38 04 00 00 5b 85 c0 0f 95 c0 c3 66 2e 0f 1f 84 00 00 00 00
[   10.550087][    T1] RSP: 0000:ffffc90000027b80 EFLAGS: 00010293
[   10.550087][    T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   10.550087][    T1] RDX: ffff88823544c040 RSI: ffffffff823265b9 RDI: 0000000000000000
[   10.550087][    T1] RBP: ffff888227238800 R08: 0000000000000001 R09: 0000000000000000
[   10.550087][    T1] R10: ffff888227238800 R11: 0000000000000001 R12: 0000000000000000
[   10.550087][    T1] R13: ffff888235103000 R14: 0000000000000000 R15: ffff888226cc6af0
[   10.850690][    T1] FS:  0000000000000000(0000) GS:ffff888236e00000(0000) knlGS:0000000000000000
[   10.850690][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.850690][    T1] CR2: 0000000000000438 CR3: 0000000004a89001 CR4: 00000000003706f0
[   10.850690][    T1] Call Trace:
[   10.850690][    T1]  __drm_atomic_helper_crtc_reset+0x28/0x50
[   10.850690][    T1]  vmw_du_crtc_reset+0x62/0x80
[   10.850690][    T1]  vmw_kms_stdu_init_display+0x302/0x3f0
[   10.850690][    T1]  vmw_kms_init+0x6f/0xe0
[   10.850690][    T1]  vmw_probe+0xd52/0x1730
[   10.850690][    T1]  local_pci_probe+0x3a/0x90
[   10.850690][    T1]  pci_device_probe+0x163/0x230
[   10.850690][    T1]  ? pci_device_remove+0x100/0x100
[   10.850690][    T1]  really_probe+0x228/0x480
[   10.850690][    T1]  ? rdinit_setup+0x3b/0x3b
[   10.850690][    T1]  driver_probe_device+0x6c/0xe0
[   10.850690][    T1]  device_driver_attach+0x5a/0x60
[   10.850690][    T1]  __driver_attach+0xbd/0x100
[   10.850690][    T1]  ? device_driver_attach+0x60/0x60
[   10.850690][    T1]  bus_for_each_dev+0x9e/0x110
[   10.850690][    T1]  bus_add_driver+0x1c8/0x260
[   10.850690][    T1]  driver_register+0x96/0x160
[   10.850690][    T1]  ? i915_global_vma_init+0x51/0x51
[   11.202435][    T1]  vmwgfx_init+0x2e/0x4e
[   11.202435][    T1]  do_one_initcall+0x84/0x4a0
[   11.202435][    T1]  ? rdinit_setup+0x3b/0x3b
[   11.202435][    T1]  ? rcu_read_lock_sched_held+0x4d/0x80
[   11.202435][    T1]  ? cpumask_test_cpu.constprop.19+0x12/0x30
[   11.202435][    T1]  ? rdinit_setup+0x3b/0x3b
[   11.202435][    T1]  kernel_init_freeable+0x298/0x30c
[   11.202435][    T1]  ? rest_init+0x2c0/0x2c0
[   11.202435][    T1]  kernel_init+0xf/0x170
[   11.282173][    T1]  ? _raw_spin_unlock_irq+0x3a/0x50
[   11.282173][    T1]  ? rest_init+0x2c0/0x2c0
[   11.282173][    T1]  ret_from_fork+0x1f/0x30
[   11.282173][    T1] Modules linked in:
[   11.282173][    T1] CR2: 0000000000000438
[   11.282173][    T1] ---[ end trace fb560758d9d704d3 ]---
[   11.282173][    T1] RIP: 0010:drm_dev_has_vblank+0x9/0x20
[   11.282173][    T1] Code: 5d 41 5e 41 5f e9 e7 fa 01 ff e8 e2 fa 01 ff 45 31 e4 41 8b 5f 48 eb a7 cc cc cc cc cc cc cc cc cc 53 48 89 fb e8 c7 fa 01 ff <8b> 83 38 04 00 00 5b 85 c0 0f 95 c0 c3 66 2e 0f 1f 84 00 00 00 00
[   11.282173][    T1] RSP: 0000:ffffc90000027b80 EFLAGS: 00010293
[   11.282173][    T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   11.282173][    T1] RDX: ffff88823544c040 RSI: ffffffff823265b9 RDI: 0000000000000000
[   11.282173][    T1] RBP: ffff888227238800 R08: 0000000000000001 R09: 0000000000000000
[   11.282173][    T1] R10: ffff888227238800 R11: 0000000000000001 R12: 0000000000000000
[   11.282173][    T1] R13: ffff888235103000 R14: 0000000000000000 R15: ffff888226cc6af0
[   11.282173][    T1] FS:  0000000000000000(0000) GS:ffff888236e00000(0000) knlGS:0000000000000000
[   11.282173][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.282173][    T1] CR2: 0000000000000438 CR3: 0000000004a89001 CR4: 00000000003706f0
[   11.282173][    T1] Kernel panic - not syncing: Fatal exception
[   11.282173][    T1] Kernel Offset: disabled
[   11.282173][    T1] Rebooting in 86400 seconds..
Daniel Vetter Aug. 6, 2020, 6:57 a.m. UTC | #5
On Thu, Aug 06, 2020 at 03:43:02PM +0900, Tetsuo Handa wrote:
> As of commit 47ec5303d73ea344 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next") on linux.git ,
> my VMware environment cannot boot. Do I need to bisect?

That sounds like a good idea, but please start a new thread (not reply to
some random existing ones), with maintainers for drivers/gpu/drm/vmwgfx
only. Not a massive list of random folks who have no idea what's going on
here. From get_maintainers.pl

$ scripts/get_maintainer.pl -f drivers/gpu/drm/vmwgfx/
VMware Graphics <linux-graphics-maintainer@vmware.com> (supporter:DRM DRIVER FOR VMWARE VIRTUAL GPU)
Roland Scheidegger <sroland@vmware.com> (supporter:DRM DRIVER FOR VMWARE VIRTUAL GPU)
David Airlie <airlied@linux.ie> (maintainer:DRM DRIVERS)
Daniel Vetter <daniel@ffwll.ch> (maintainer:DRM DRIVERS)
dri-devel@lists.freedesktop.org (open list:DRM DRIVER FOR VMWARE VIRTUAL GPU)
linux-kernel@vger.kernel.org (open list)

Cheers, Daniel

> 
> [    9.314496][    T1] vga16fb: mapped to 0x0000000071050562
> [    9.467770][    T1] Console: switching to colour frame buffer device 80x30
> [    9.632092][    T1] fb0: VGA16 VGA frame buffer device
> [    9.651768][    T1] ACPI: AC Adapter [ACAD] (on-line)
> [    9.672544][    T1] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> [    9.722373][    T1] ACPI: Power Button [PWRF]
> [    9.744231][    T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
> [    9.820147][    T1] N_HDLC line discipline registered with maxframe=4096
> [    9.835649][    T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [    9.852567][    T1] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> [   10.033372][    T1] Cyclades driver 2.6
> [   10.049928][    T1] Initializing Nozomi driver 2.1d
> [   10.065493][    T1] RocketPort device driver module, version 2.09, 12-June-2003
> [   10.095368][    T1] No rocketport ports found; unloading driver
> [   10.112430][    T1] Non-volatile memory driver v1.3
> [   10.127090][    T1] Linux agpgart interface v0.103
> [   10.144037][    T1] agpgart-intel 0000:00:00.0: Intel 440BX Chipset
> [   10.162275][    T1] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0x0
> [   10.181130][    T1] [drm] DMA map mode: Caching DMA mappings.
> [   10.195150][    T1] [drm] Capabilities:
> [   10.208728][    T1] [drm]   Rect copy.
> [   10.222772][    T1] [drm]   Cursor.
> [   10.235364][    T1] [drm]   Cursor bypass.
> [   10.249121][    T1] [drm]   Cursor bypass 2.
> [   10.260590][    T1] [drm]   8bit emulation.
> [   10.272220][    T1] [drm]   Alpha cursor.
> [   10.284670][    T1] [drm]   3D.
> [   10.295051][    T1] [drm]   Extended Fifo.
> [   10.305180][    T1] [drm]   Multimon.
> [   10.315506][    T1] [drm]   Pitchlock.
> [   10.325167][    T1] [drm]   Irq mask.
> [   10.334262][    T1] [drm]   Display Topology.
> [   10.343519][    T1] [drm]   GMR.
> [   10.352775][    T1] [drm]   Traces.
> [   10.362166][    T1] [drm]   GMR2.
> [   10.370716][    T1] [drm]   Screen Object 2.
> [   10.379220][    T1] [drm]   Command Buffers.
> [   10.388489][    T1] [drm]   Command Buffers 2.
> [   10.396055][    T1] [drm]   Guest Backed Resources.
> [   10.403290][    T1] [drm]   DX Features.
> [   10.409911][    T1] [drm]   HP Command Queue.
> [   10.417820][    T1] [drm] Capabilities2:
> [   10.424216][    T1] [drm]   Grow oTable.
> [   10.430423][    T1] [drm]   IntraSurface copy.
> [   10.436371][    T1] [drm] Max GMR ids is 64
> [   10.442651][    T1] [drm] Max number of GMR pages is 65536
> [   10.450317][    T1] [drm] Max dedicated hypervisor surface memory is 0 kiB
> [   10.458809][    T1] [drm] Maximum display memory size is 262144 kiB
> [   10.466330][    T1] [drm] VRAM at 0xe8000000 size is 4096 kiB
> [   10.474704][    T1] [drm] MMIO at 0xfe000000 size is 256 kiB
> [   10.484625][    T1] [TTM] Zone  kernel: Available graphics memory: 4030538 KiB
> [   10.500730][    T1] [TTM] Zone   dma32: Available graphics memory: 2097152 KiB
> [   10.516851][    T1] [TTM] Initializing pool allocator
> [   10.527542][    T1] [TTM] Initializing DMA pool allocator
> [   10.540197][    T1] BUG: kernel NULL pointer dereference, address: 0000000000000438
> [   10.550087][    T1] #PF: supervisor read access in kernel mode
> [   10.550087][    T1] #PF: error_code(0x0000) - not-present page
> [   10.550087][    T1] PGD 0 P4D 0 
> [   10.550087][    T1] Oops: 0000 [#1] PREEMPT SMP
> [   10.550087][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.8.0+ #271
> [   10.550087][    T1] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020
> [   10.550087][    T1] RIP: 0010:drm_dev_has_vblank+0x9/0x20
> [   10.550087][    T1] Code: 5d 41 5e 41 5f e9 e7 fa 01 ff e8 e2 fa 01 ff 45 31 e4 41 8b 5f 48 eb a7 cc cc cc cc cc cc cc cc cc 53 48 89 fb e8 c7 fa 01 ff <8b> 83 38 04 00 00 5b 85 c0 0f 95 c0 c3 66 2e 0f 1f 84 00 00 00 00
> [   10.550087][    T1] RSP: 0000:ffffc90000027b80 EFLAGS: 00010293
> [   10.550087][    T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> [   10.550087][    T1] RDX: ffff88823544c040 RSI: ffffffff823265b9 RDI: 0000000000000000
> [   10.550087][    T1] RBP: ffff888227238800 R08: 0000000000000001 R09: 0000000000000000
> [   10.550087][    T1] R10: ffff888227238800 R11: 0000000000000001 R12: 0000000000000000
> [   10.550087][    T1] R13: ffff888235103000 R14: 0000000000000000 R15: ffff888226cc6af0
> [   10.850690][    T1] FS:  0000000000000000(0000) GS:ffff888236e00000(0000) knlGS:0000000000000000
> [   10.850690][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   10.850690][    T1] CR2: 0000000000000438 CR3: 0000000004a89001 CR4: 00000000003706f0
> [   10.850690][    T1] Call Trace:
> [   10.850690][    T1]  __drm_atomic_helper_crtc_reset+0x28/0x50
> [   10.850690][    T1]  vmw_du_crtc_reset+0x62/0x80
> [   10.850690][    T1]  vmw_kms_stdu_init_display+0x302/0x3f0
> [   10.850690][    T1]  vmw_kms_init+0x6f/0xe0
> [   10.850690][    T1]  vmw_probe+0xd52/0x1730
> [   10.850690][    T1]  local_pci_probe+0x3a/0x90
> [   10.850690][    T1]  pci_device_probe+0x163/0x230
> [   10.850690][    T1]  ? pci_device_remove+0x100/0x100
> [   10.850690][    T1]  really_probe+0x228/0x480
> [   10.850690][    T1]  ? rdinit_setup+0x3b/0x3b
> [   10.850690][    T1]  driver_probe_device+0x6c/0xe0
> [   10.850690][    T1]  device_driver_attach+0x5a/0x60
> [   10.850690][    T1]  __driver_attach+0xbd/0x100
> [   10.850690][    T1]  ? device_driver_attach+0x60/0x60
> [   10.850690][    T1]  bus_for_each_dev+0x9e/0x110
> [   10.850690][    T1]  bus_add_driver+0x1c8/0x260
> [   10.850690][    T1]  driver_register+0x96/0x160
> [   10.850690][    T1]  ? i915_global_vma_init+0x51/0x51
> [   11.202435][    T1]  vmwgfx_init+0x2e/0x4e
> [   11.202435][    T1]  do_one_initcall+0x84/0x4a0
> [   11.202435][    T1]  ? rdinit_setup+0x3b/0x3b
> [   11.202435][    T1]  ? rcu_read_lock_sched_held+0x4d/0x80
> [   11.202435][    T1]  ? cpumask_test_cpu.constprop.19+0x12/0x30
> [   11.202435][    T1]  ? rdinit_setup+0x3b/0x3b
> [   11.202435][    T1]  kernel_init_freeable+0x298/0x30c
> [   11.202435][    T1]  ? rest_init+0x2c0/0x2c0
> [   11.202435][    T1]  kernel_init+0xf/0x170
> [   11.282173][    T1]  ? _raw_spin_unlock_irq+0x3a/0x50
> [   11.282173][    T1]  ? rest_init+0x2c0/0x2c0
> [   11.282173][    T1]  ret_from_fork+0x1f/0x30
> [   11.282173][    T1] Modules linked in:
> [   11.282173][    T1] CR2: 0000000000000438
> [   11.282173][    T1] ---[ end trace fb560758d9d704d3 ]---
> [   11.282173][    T1] RIP: 0010:drm_dev_has_vblank+0x9/0x20
> [   11.282173][    T1] Code: 5d 41 5e 41 5f e9 e7 fa 01 ff e8 e2 fa 01 ff 45 31 e4 41 8b 5f 48 eb a7 cc cc cc cc cc cc cc cc cc 53 48 89 fb e8 c7 fa 01 ff <8b> 83 38 04 00 00 5b 85 c0 0f 95 c0 c3 66 2e 0f 1f 84 00 00 00 00
> [   11.282173][    T1] RSP: 0000:ffffc90000027b80 EFLAGS: 00010293
> [   11.282173][    T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> [   11.282173][    T1] RDX: ffff88823544c040 RSI: ffffffff823265b9 RDI: 0000000000000000
> [   11.282173][    T1] RBP: ffff888227238800 R08: 0000000000000001 R09: 0000000000000000
> [   11.282173][    T1] R10: ffff888227238800 R11: 0000000000000001 R12: 0000000000000000
> [   11.282173][    T1] R13: ffff888235103000 R14: 0000000000000000 R15: ffff888226cc6af0
> [   11.282173][    T1] FS:  0000000000000000(0000) GS:ffff888236e00000(0000) knlGS:0000000000000000
> [   11.282173][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   11.282173][    T1] CR2: 0000000000000438 CR3: 0000000004a89001 CR4: 00000000003706f0
> [   11.282173][    T1] Kernel panic - not syncing: Fatal exception
> [   11.282173][    T1] Kernel Offset: disabled
> [   11.282173][    T1] Rebooting in 86400 seconds..
> 
>

Patch
diff mbox series

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 56bd938961ee..f33418d6e1a0 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -492,10 +492,8 @@  static void komeda_crtc_reset(struct drm_crtc *crtc)
 	crtc->state = NULL;
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
+	if (state)
+		__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *
@@ -616,7 +614,6 @@  static int komeda_crtc_add(struct komeda_kms_dev *kms,
 		return err;
 
 	drm_crtc_helper_add(crtc, &komeda_crtc_helper_funcs);
-	drm_crtc_vblank_reset(crtc);
 
 	crtc->port = kcrtc->master->of_output_port;
 
diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index 6feda7cb37a6..c9e1ee84b4e8 100644
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -861,7 +861,6 @@  static int malidp_bind(struct device *dev)
 	drm->irq_enabled = true;
 
 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
-	drm_crtc_vblank_reset(&malidp->crtc);
 	if (ret < 0) {
 		DRM_ERROR("failed to initialise vblank\n");
 		goto vblank_fail;
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 10985134ce0b..ce246b96330b 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -411,10 +411,8 @@  static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
 	}
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
+	if (state)
+		__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *
@@ -528,7 +526,6 @@  int atmel_hlcdc_crtc_create(struct drm_device *dev)
 	}
 
 	drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs);
-	drm_crtc_vblank_reset(&crtc->base);
 
 	drm_mode_crtc_set_gamma_size(&crtc->base, ATMEL_HLCDC_CLUT_SIZE);
 	drm_crtc_enable_color_mgmt(&crtc->base, 0, false,
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 8fce6a115dfe..9ad74045158e 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -32,6 +32,7 @@ 
 #include <drm/drm_device.h>
 #include <drm/drm_plane.h>
 #include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
 #include <drm/drm_writeback.h>
 
 #include <linux/slab.h>
@@ -93,6 +94,9 @@  __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
 	if (crtc_state)
 		__drm_atomic_helper_crtc_state_reset(crtc_state, crtc);
 
+	if (drm_dev_has_vblank(crtc->dev))
+		drm_crtc_vblank_reset(crtc);
+
 	crtc->state = crtc_state;
 }
 EXPORT_SYMBOL(__drm_atomic_helper_crtc_reset);
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
index e152016a6a7d..c39dad151bb6 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
@@ -1117,8 +1117,6 @@  static void mdp5_crtc_reset(struct drm_crtc *crtc)
 		mdp5_crtc_destroy_state(crtc, crtc->state);
 
 	__drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
-
-	drm_crtc_vblank_reset(crtc);
 }
 
 static const struct drm_crtc_funcs mdp5_crtc_funcs = {
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index fce7e944a280..6d40914675da 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -697,14 +697,16 @@  static int omap_crtc_atomic_get_property(struct drm_crtc *crtc,
 
 static void omap_crtc_reset(struct drm_crtc *crtc)
 {
+	struct omap_crtc_state *state;
+
 	if (crtc->state)
 		__drm_atomic_helper_crtc_destroy_state(crtc->state);
 
 	kfree(crtc->state);
-	crtc->state = kzalloc(sizeof(struct omap_crtc_state), GFP_KERNEL);
 
-	if (crtc->state)
-		crtc->state->crtc = crtc;
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (state)
+		__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 242d28281784..4526967978b7 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -595,7 +595,6 @@  static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
 {
 	const struct soc_device_attribute *soc;
 	struct drm_device *ddev;
-	unsigned int i;
 	int ret;
 
 	DBG("%s", dev_name(dev));
@@ -642,9 +641,6 @@  static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
 		goto err_cleanup_modeset;
 	}
 
-	for (i = 0; i < priv->num_pipes; i++)
-		drm_crtc_vblank_off(priv->pipes[i].crtc);
-
 	omap_fbdev_init(ddev);
 
 	drm_kms_helper_poll_init(ddev);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index d73e88ddecd0..fe86a3e67757 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -975,8 +975,7 @@  static void rcar_du_crtc_reset(struct drm_crtc *crtc)
 	state->crc.source = VSP1_DU_CRC_NONE;
 	state->crc.index = 0;
 
-	crtc->state = &state->state;
-	crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &state->state);
 }
 
 static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
@@ -1271,9 +1270,6 @@  int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
 
 	drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 
-	/* Start with vertical blanking interrupt reporting disabled. */
-	drm_crtc_vblank_off(crtc);
-
 	/* Register the interrupt handler. */
 	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) {
 		/* The IRQ's are associated with the CRTC (sw)index. */
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 83f31c6e891c..9b308b572eac 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1168,7 +1168,6 @@  static void tegra_crtc_reset(struct drm_crtc *crtc)
 		tegra_crtc_atomic_destroy_state(crtc, crtc->state);
 
 	__drm_atomic_helper_crtc_reset(crtc, &state->base);
-	drm_crtc_vblank_reset(crtc);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
index 89a226912de8..4d01c4af61cd 100644
--- a/drivers/gpu/drm/tidss/tidss_crtc.c
+++ b/drivers/gpu/drm/tidss/tidss_crtc.c
@@ -352,8 +352,7 @@  static void tidss_crtc_reset(struct drm_crtc *crtc)
 		return;
 	}
 
-	crtc->state = &tcrtc->base;
-	crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &tcrtc->base);
 }
 
 static struct drm_crtc_state *tidss_crtc_duplicate_state(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
index 4b99e9fa84a5..e6ab59eed259 100644
--- a/drivers/gpu/drm/tidss/tidss_kms.c
+++ b/drivers/gpu/drm/tidss/tidss_kms.c
@@ -278,10 +278,6 @@  int tidss_modeset_init(struct tidss_device *tidss)
 	if (ret)
 		return ret;
 
-	/* Start with vertical blanking interrupt reporting disabled. */
-	for (i = 0; i < tidss->num_crtcs; ++i)
-		drm_crtc_vblank_reset(tidss->crtcs[i]);
-
 	drm_mode_config_reset(ddev);
 
 	dev_dbg(tidss->dev, "%s done\n", __func__);