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drm/i915: Drop struct_mutex around frontbuffer flushes

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Since the frontbuffer has self-contained locking, it does not require us
to hold the BKL struct_mutex as we send invalidate and flush messages.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215105919.7347-3-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Chris Wilson 2017-02-15 10:59:19 +00:00
parent 24dbf51a55
commit fabef82562
1 changed files with 17 additions and 26 deletions
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43
drivers/gpu/drm/i915/intel_fbdev.c
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@ -45,6 +45,14 @@
#include <drm/i915_drm.h>
#include "i915_drv.h"
static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
{
struct drm_i915_gem_object *obj = ifbdev->fb->obj;
unsigned int origin = ifbdev->vma->fence ? ORIGIN_GTT : ORIGIN_CPU;
intel_fb_obj_invalidate(obj, origin);
}
static int intel_fbdev_set_par(struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
@ -53,12 +61,8 @@ static int intel_fbdev_set_par(struct fb_info *info)
int ret;
ret = drm_fb_helper_set_par(info);
if (ret == 0) {
mutex_lock(&fb_helper->dev->struct_mutex);
intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
mutex_unlock(&fb_helper->dev->struct_mutex);
}
if (ret == 0)
intel_fbdev_invalidate(ifbdev);
return ret;
}
@ -71,12 +75,8 @@ static int intel_fbdev_blank(int blank, struct fb_info *info)
int ret;
ret = drm_fb_helper_blank(blank, info);
if (ret == 0) {
mutex_lock(&fb_helper->dev->struct_mutex);
intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
mutex_unlock(&fb_helper->dev->struct_mutex);
}
if (ret == 0)
intel_fbdev_invalidate(ifbdev);
return ret;
}
@ -87,15 +87,11 @@ static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
struct drm_fb_helper *fb_helper = info->par;
struct intel_fbdev *ifbdev =
container_of(fb_helper, struct intel_fbdev, helper);
int ret;
ret = drm_fb_helper_pan_display(var, info);
if (ret == 0) {
mutex_lock(&fb_helper->dev->struct_mutex);
intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
mutex_unlock(&fb_helper->dev->struct_mutex);
}
ret = drm_fb_helper_pan_display(var, info);
if (ret == 0)
intel_fbdev_invalidate(ifbdev);
return ret;
}
@ -838,11 +834,6 @@ void intel_fbdev_restore_mode(struct drm_device *dev)
if (!ifbdev->fb)
return;
if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper)) {
DRM_DEBUG("failed to restore crtc mode\n");
} else {
mutex_lock(&dev->struct_mutex);
intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
mutex_unlock(&dev->struct_mutex);
}
if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
intel_fbdev_invalidate(ifbdev);
}