drm: Nuke ->vblank_disable_allowed

This was added in

commit 0a3e67a4caac273a3bfc4ced3da364830b1ab241
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Tue Sep 30 12:14:26 2008 -0700

    drm: Rework vblank-wait handling to allow interrupt reduction.

to stay backwards-compatible with old UMS code that didn't even tell
the kernel when it did a modeset, so that the kernel could
save/restore vblank counters. At worst this means vblanks will be
somewhat funky on a setup that very likely no one still runs.

So let's just nuke it.

Plan B would be to set it unconditionally in drm_vblank_init for kms
drivers, instead of in each driver separately. So if this patch breaks
anything please only restore the hunks in drmP.h and drm_irq.c, plus
add a check for DRIVER_MODESET in drm_vblank_init.

Stumbled over this in a discussion on irc with Chris.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

14 files changed, 0 insertions, 47 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 9266c7b69808..835a3fa8d8df 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -219,7 +219,6 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
         if (r) {
                 return r;
         }
-        adev->ddev->vblank_disable_allowed = true;
 
         /* enable msi */
         adev->irq.msi_enabled = false;
diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index 734899c4e4bb..b987c63ba8d6 100644
--- a/drivers/gpu/drm/arm/hdlcd_drv.c
+++ b/drivers/gpu/drm/arm/hdlcd_drv.c
@@ -379,7 +379,6 @@ static int hdlcd_drm_bind(struct device *dev)
                 DRM_ERROR("failed to initialise vblank\n");
                 goto err_vblank;
         }
-        drm->vblank_disable_allowed = true;
 
         drm_mode_config_reset(drm);
         drm_kms_helper_poll_init(drm);
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index 82043c204b76..439824a61aa5 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -113,7 +113,6 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
                 goto err_comp;
 
         dev->irq_enabled = true;
-        dev->vblank_disable_allowed = 1;
 
         ret = armada_fbdev_init(dev);
         if (ret)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 3c1a6f18e71c..0fac801c18fe 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -348,9 +348,6 @@ static void vblank_disable_fn(unsigned long arg)
         unsigned int pipe = vblank->pipe;
         unsigned long irqflags;
 
-        if (!dev->vblank_disable_allowed)
-                return;
-
         spin_lock_irqsave(&dev->vbl_lock, irqflags);
         if (atomic_read(&vblank->refcount) == 0 && vblank->enabled) {
                 DRM_DEBUG("disabling vblank on crtc %u\n", pipe);
@@ -437,8 +434,6 @@ int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs)
                          "get_vblank_timestamp == NULL\n");
         }
 
-        dev->vblank_disable_allowed = false;
-
         return 0;
 
 err:
@@ -1585,7 +1580,6 @@ void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe)
 
         if (vblank->inmodeset) {
                 spin_lock_irqsave(&dev->vbl_lock, irqflags);
-                dev->vblank_disable_allowed = true;
                 drm_reset_vblank_timestamp(dev, pipe);
                 spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 21c719e8e02b..2dd820e23b0c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -212,13 +212,6 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
          */
         dev->irq_enabled = true;
 
-        /*
-         * with vblank_disable_allowed = true, vblank interrupt will be disabled
-         * by drm timer once a current process gives up ownership of
-         * vblank event.(after drm_vblank_put function is called)
-         */
-        dev->vblank_disable_allowed = true;
-
         /* init kms poll for handling hpd */
         drm_kms_helper_poll_init(dev);
 
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index 44f6f262d75a..0ec1ad961e0d 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -80,7 +80,6 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
                 dev_err(dev->dev, "failed to initialize vblank\n");
                 goto done;
         }
-        dev->vblank_disable_allowed = true;
 
         ret = fsl_dcu_drm_irq_init(dev);
         if (ret < 0)
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 4e1c6850520e..82b8ce418b27 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -374,7 +374,6 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
 
         drm_irq_install(dev, dev->pdev->irq);
 
-        dev->vblank_disable_allowed = true;
         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
         dev->driver->get_vblank_counter = psb_get_vblank_counter;
 
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 5c7615041b31..15615fb9bde6 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -476,9 +476,6 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
         intel_modeset_gem_init(dev);
 
-        /* Always safe in the mode setting case. */
-        /* FIXME: do pre/post-mode set stuff in core KMS code */
-        dev->vblank_disable_allowed = true;
         if (INTEL_INFO(dev)->num_pipes == 0)
                 return 0;
 
diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 2453fb1c68a7..1080019e7b17 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -252,13 +252,6 @@ static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
         if (ret)
                 goto err_kms;
 
-        /*
-         * with vblank_disable_allowed = true, vblank interrupt will be
-         * disabled by drm timer once a current process gives up ownership
-         * of vblank event. (after drm_vblank_put function is called)
-         */
-        drm->vblank_disable_allowed = true;
-
         platform_set_drvdata(drm->platformdev, drm);
 
         /* Now try and bind all our sub-components */
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index 1e9304d1c88f..c084cadcbf21 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -291,7 +291,6 @@ int radeon_irq_kms_init(struct radeon_device *rdev)
         if (r) {
                 return r;
         }
-        rdev->ddev->vblank_disable_allowed = true;
 
         /* enable msi */
         rdev->msi_enabled = 0;
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 399adf3c4224..a409d1f703cb 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -216,13 +216,6 @@ static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
         if (ret)
                 goto err_kms_helper_poll_fini;
 
-        /*
-         * with vblank_disable_allowed = true, vblank interrupt will be disabled
-         * by drm timer once a current process gives up ownership of
-         * vblank event.(after drm_vblank_put function is called)
-         */
-        drm_dev->vblank_disable_allowed = true;
-
         drm_mode_config_reset(drm_dev);
 
         ret = rockchip_drm_fbdev_init(drm_dev);
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 679905544181..b59c3bf0df44 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -180,7 +180,6 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 
         /* syncpoints are used for full 32-bit hardware VBLANK counters */
         drm->max_vblank_count = 0xffffffff;
-        drm->vblank_disable_allowed = true;
 
         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
         if (err < 0)
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index d423ba10239a..cb37751bc99f 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -207,8 +207,6 @@ int vc4_kms_load(struct drm_device *dev)
         dev->mode_config.preferred_depth = 24;
         dev->mode_config.async_page_flip = true;
 
-        dev->vblank_disable_allowed = true;
-
         drm_mode_config_reset(dev);
 
         vc4->fbdev = drm_fbdev_cma_init(dev, 32,
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 360b2a74e1ef..84f1a8eefbdb 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -815,14 +815,6 @@ struct drm_device {
         int irq;
 
         /*
-         * At load time, disabling the vblank interrupt won't be allowed since
-         * old clients may not call the modeset ioctl and therefore misbehave.
-         * Once the modeset ioctl *has* been called though, we can safely
-         * disable them when unused.
-         */
-        bool vblank_disable_allowed;
-
-        /*
          * If true, vblank interrupt will be disabled immediately when the
          * refcount drops to zero, as opposed to via the vblank disable
          * timer.