From 7128645d5c647ba3fe1684f2d5710ee403babca2 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Mon, 3 Apr 2017 10:33:04 +0200 Subject: [PATCH] drm/fb-helper: Extract _legacy kms functions The goal is to push all the kms locking down into these separate _atomic and _legacy functions, so that we can correctly pass the acquire ctx into all atomic drivers. Instead of playing games with hidden ctx in mode_config.acquire_ctx. All the fbdev state will be protected by a new fbdev private lock that Thierry is working on. This here is just prep by creating a clean split between atomic and legacy paths, which also simplifies the control flow a bit. Reviewed-by: Maarten Lankhorst Acked-by: Alex Deucher Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170403083304.9083-16-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_fb_helper.c | 72 ++++++++++++++++++++------------- 1 file changed, 44 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 6dc5381e1c45..a0ea3241c651 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -418,17 +418,12 @@ backoff: goto retry; } -static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) +static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_plane *plane; int i; - drm_warn_on_modeset_not_all_locked(dev); - - if (drm_drv_uses_atomic_modeset(dev)) - return restore_fbdev_mode_atomic(fb_helper); - drm_for_each_plane(plane, dev) { if (plane->type != DRM_PLANE_TYPE_PRIMARY) drm_plane_force_disable(plane); @@ -462,6 +457,18 @@ static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) return 0; } +static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) +{ + struct drm_device *dev = fb_helper->dev; + + drm_warn_on_modeset_not_all_locked(dev); + + if (drm_drv_uses_atomic_modeset(dev)) + return restore_fbdev_mode_atomic(fb_helper); + else + return restore_fbdev_mode_legacy(fb_helper); +} + /** * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration * @fb_helper: fbcon to restore @@ -1513,34 +1520,14 @@ backoff: goto retry; } -/** - * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display - * @var: updated screen information - * @info: fbdev registered by the helper - */ -int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, +static int pan_display_legacy(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; - struct drm_device *dev = fb_helper->dev; struct drm_mode_set *modeset; int ret = 0; int i; - if (oops_in_progress) - return -EBUSY; - - drm_modeset_lock_all(dev); - if (!drm_fb_helper_is_bound(fb_helper)) { - drm_modeset_unlock_all(dev); - return -EBUSY; - } - - if (drm_drv_uses_atomic_modeset(dev)) { - ret = pan_display_atomic(var, info); - goto unlock; - } - for (i = 0; i < fb_helper->crtc_count; i++) { modeset = &fb_helper->crtc_info[i].mode_set; @@ -1555,8 +1542,37 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, } } } -unlock: + + return ret; +} + +/** + * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display + * @var: updated screen information + * @info: fbdev registered by the helper + */ +int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_device *dev = fb_helper->dev; + int ret; + + if (oops_in_progress) + return -EBUSY; + + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return -EBUSY; + } + + if (drm_drv_uses_atomic_modeset(dev)) + ret = pan_display_atomic(var, info); + else + ret = pan_display_legacy(var, info); drm_modeset_unlock_all(dev); + return ret; } EXPORT_SYMBOL(drm_fb_helper_pan_display); -- 2.20.1