All drm_fb_helper_restore_fbdev_mode() call sites, save one, do the same
locking. Simplify this into drm_fb_helper_restore_fbdev_mode_unlocked().
Signed-off-by: Rob Clark <robdclark@xxxxxxxxx>
---
drivers/gpu/drm/armada/armada_fbdev.c | 4 +--
drivers/gpu/drm/drm_fb_cma_helper.c | 9 ++----
drivers/gpu/drm/drm_fb_helper.c | 51 +++++++++++++++++++++++--------
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 4 +--
drivers/gpu/drm/gma500/psb_drv.c | 4 +--
drivers/gpu/drm/i915/intel_fbdev.c | 6 +---
drivers/gpu/drm/msm/msm_drv.c | 7 ++---
drivers/gpu/drm/omapdrm/omap_drv.c | 4 +--
drivers/gpu/drm/tegra/fb.c | 7 ++---
include/drm/drm_fb_helper.h | 1 +
10 files changed, 50 insertions(+), 47 deletions(-)
diff --git a/drivers/gpu/drm/armada/armada_fbdev.c b/drivers/gpu/drm/armada/armada_fbdev.c
index 948cb14..fd166f5 100644
--- a/drivers/gpu/drm/armada/armada_fbdev.c
+++ b/drivers/gpu/drm/armada/armada_fbdev.c
@@ -181,10 +181,8 @@ void armada_fbdev_lastclose(struct drm_device *dev)
{
struct armada_private *priv = dev->dev_private;
- drm_modeset_lock_all(dev);
if (priv->fbdev)
- drm_fb_helper_restore_fbdev_mode(priv->fbdev);
- drm_modeset_unlock_all(dev);
+ drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
}
void armada_fbdev_fini(struct drm_device *dev)
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index 61b5a47..f27c883 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -429,13 +429,8 @@ EXPORT_SYMBOL_GPL(drm_fbdev_cma_fini);
*/
void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma)
{
- if (fbdev_cma) {
- struct drm_device *dev = fbdev_cma->fb_helper.dev;
-
- drm_modeset_lock_all(dev);
- drm_fb_helper_restore_fbdev_mode(&fbdev_cma->fb_helper);
- drm_modeset_unlock_all(dev);
- }
+ if (fbdev_cma)
+ drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev_cma->fb_helper);
}
EXPORT_SYMBOL_GPL(drm_fbdev_cma_restore_mode);
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index b891f4c..dc861a1 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -273,15 +273,7 @@ int drm_fb_helper_debug_leave(struct fb_info *info)
}
EXPORT_SYMBOL(drm_fb_helper_debug_leave);
-/**
- * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration
- * @fb_helper: fbcon to restore
- *
- * This should be called from driver's drm ->lastclose callback
- * when implementing an fbcon on top of kms using this helper. This ensures that
- * the user isn't greeted with a black screen when e.g. X dies.
- */
-bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
+static bool restore_fbdev_mode(struct drm_fb_helper *fb_helper)
{
struct drm_device *dev = fb_helper->dev;
struct drm_plane *plane;
@@ -311,8 +303,44 @@ bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
}
return error;
}
+/**
+ * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration
+ * @fb_helper: fbcon to restore
+ * @lockless: true in drm_fb_helper_force_kernel_mode() path, to avoid
+ * blocking in panic case, everywhere else should use false
+ *
+ * This should be called from driver's drm ->lastclose callback
+ * when implementing an fbcon on top of kms using this helper. This ensures that
+ * the user isn't greeted with a black screen when e.g. X dies.
+ *
+ * Use this variant if you need to bypass locking (panic), or already
+ * hold all modeset locks. Otherwise use drm_fb_helper_restore_fbdev_mode_unlocked()
+ */
+bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
+{
+ return restore_fbdev_mode(fb_helper);
+}
EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode);
+/**
+ * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration
+ * @fb_helper: fbcon to restore
+ *
+ * This should be called from driver's drm ->lastclose callback
+ * when implementing an fbcon on top of kms using this helper. This ensures that
+ * the user isn't greeted with a black screen when e.g. X dies.
+ */
+bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
+{
+ struct drm_device *dev = fb_helper->dev;
+ bool ret;
+ drm_modeset_lock_all(dev);
+ ret = restore_fbdev_mode(fb_helper);
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked);
+
/*
* restore fbcon display for all kms driver's using this helper, used for sysrq
* and panic handling.
@@ -824,7 +852,6 @@ EXPORT_SYMBOL(drm_fb_helper_check_var);
int drm_fb_helper_set_par(struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
- struct drm_device *dev = fb_helper->dev;
struct fb_var_screeninfo *var = &info->var;
if (var->pixclock != 0) {
@@ -832,9 +859,7 @@ int drm_fb_helper_set_par(struct fb_info *info)
return -EINVAL;
}
- drm_modeset_lock_all(dev);
- drm_fb_helper_restore_fbdev_mode(fb_helper);
- drm_modeset_unlock_all(dev);
+ drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
if (fb_helper->delayed_hotplug) {
fb_helper->delayed_hotplug = false;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index addbf75..93e7ba6 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -375,7 +375,5 @@ void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
if (!private || !private->fb_helper)
return;
- drm_modeset_lock_all(dev);
- drm_fb_helper_restore_fbdev_mode(private->fb_helper);
- drm_modeset_unlock_all(dev);
+ drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper);
}
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 0a3101a..59ea45e 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -112,11 +112,9 @@ static void psb_driver_lastclose(struct drm_device *dev)
struct drm_psb_private *dev_priv = dev->dev_private;
struct psb_fbdev *fbdev = dev_priv->fbdev;
- drm_modeset_lock_all(dev);
- ret = drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
+ ret = drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->psb_fb_helper);
if (ret)
DRM_DEBUG("failed to restore crtc mode\n");
- drm_modeset_unlock_all(dev);
return;
}
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index fce4a0d..f8258ab 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -683,11 +683,7 @@ void intel_fbdev_restore_mode(struct drm_device *dev)
if (!dev_priv->fbdev)
return;
- drm_modeset_lock_all(dev);
-
- ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
+ ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
if (ret)
DRM_DEBUG("failed to restore crtc mode\n");
-
- drm_modeset_unlock_all(dev);
}
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 50ec1be..afedd8b 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -382,11 +382,8 @@ static void msm_preclose(struct drm_device *dev, struct drm_file *file)
static void msm_lastclose(struct drm_device *dev)
{
struct msm_drm_private *priv = dev->dev_private;
- if (priv->fbdev) {
- drm_modeset_lock_all(dev);
- drm_fb_helper_restore_fbdev_mode(priv->fbdev);
- drm_modeset_unlock_all(dev);
- }
+ if (priv->fbdev)
+ drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
}
static irqreturn_t msm_irq(int irq, void *arg)
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index c8270e4..002b972 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -588,9 +588,7 @@ static void dev_lastclose(struct drm_device *dev)
}
}
- drm_modeset_lock_all(dev);
- ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev);
- drm_modeset_unlock_all(dev);
+ ret = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
if (ret)
DBG("failed to restore crtc mode");
}
diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
index f7fca09..9798a70 100644
--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -346,11 +346,8 @@ static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
{
- if (fbdev) {
- drm_modeset_lock_all(fbdev->base.dev);
- drm_fb_helper_restore_fbdev_mode(&fbdev->base);
- drm_modeset_unlock_all(fbdev->base.dev);
- }
+ if (fbdev)
+ drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
}
static void tegra_fb_output_poll_changed(struct drm_device *drm)
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 6e622f7..0630b51 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -109,6 +109,7 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
struct fb_info *info);
bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper);
+bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
uint32_t fb_width, uint32_t fb_height);
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
--
1.9.3
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