[PATCH v2 1/7] drm: Add fb_helper->restore_fbdev_mode hook

[ville.syrjala@linux.intel.com]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Drivers may need to turn off overlay planes, cursors, etc. when
restoring the fbdev mode. So allow drivers to provide their own
version of drm_fb_helper_restore_fbdev_mode() that can take care
of such details.

Initially just plug in drm_fb_helper_restore_fbdev_mode for all
drivers.

v2: Add kernel-doc for the new hook

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/ast/ast_fb.c              | 1 +
 drivers/gpu/drm/cirrus/cirrus_fbdev.c     | 1 +
 drivers/gpu/drm/drm_fb_cma_helper.c       | 1 +
 drivers/gpu/drm/drm_fb_helper.c           | 2 +-
 drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 1 +
 drivers/gpu/drm/gma500/framebuffer.c      | 1 +
 drivers/gpu/drm/i915/intel_fb.c           | 1 +
 drivers/gpu/drm/mgag200/mgag200_fb.c      | 1 +
 drivers/gpu/drm/nouveau/nouveau_fbcon.c   | 1 +
 drivers/gpu/drm/omapdrm/omap_fbdev.c      | 1 +
 drivers/gpu/drm/qxl/qxl_fb.c              | 1 +
 drivers/gpu/drm/radeon/radeon_fb.c        | 1 +
 drivers/gpu/drm/udl/udl_fb.c              | 1 +
 include/drm/drm_fb_helper.h               | 2 ++
 14 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ast/ast_fb.c b/drivers/gpu/drm/ast/ast_fb.c
index fbc0823..a9cafe2 100644
--- a/drivers/gpu/drm/ast/ast_fb.c
+++ b/drivers/gpu/drm/ast/ast_fb.c
@@ -290,6 +290,7 @@ static struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 	.gamma_set = ast_fb_gamma_set,
 	.gamma_get = ast_fb_gamma_get,
 	.fb_probe = astfb_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 static void ast_fbdev_destroy(struct drm_device *dev,
diff --git a/drivers/gpu/drm/cirrus/cirrus_fbdev.c b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
index 3541b56..064a182 100644
--- a/drivers/gpu/drm/cirrus/cirrus_fbdev.c
+++ b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
@@ -288,6 +288,7 @@ static struct drm_fb_helper_funcs cirrus_fb_helper_funcs = {
 	.gamma_set = cirrus_crtc_fb_gamma_set,
 	.gamma_get = cirrus_crtc_fb_gamma_get,
 	.fb_probe = cirrusfb_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 int cirrus_fbdev_init(struct cirrus_device *cdev)
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index 0b5af7d..f011628 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -330,6 +330,7 @@ err_drm_gem_cma_free_object:
 
 static struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = {
 	.fb_probe = drm_fbdev_cma_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 /**
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 0df0ebb..e9af615 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -318,7 +318,7 @@ static bool drm_fb_helper_force_kernel_mode(void)
 		if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 			continue;
 
-		ret = drm_fb_helper_restore_fbdev_mode(helper);
+		ret = helper->funcs->restore_fbdev_mode(helper);
 		if (ret)
 			error = true;
 	}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index 68f0045..6ed4065 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -228,6 +228,7 @@ out:
 
 static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
 	.fb_probe =	exynos_drm_fbdev_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 int exynos_drm_fbdev_init(struct drm_device *dev)
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 1534e22..8d7f9c0 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -567,6 +567,7 @@ static struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 	.gamma_set = psbfb_gamma_set,
 	.gamma_get = psbfb_gamma_get,
 	.fb_probe = psbfb_probe,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 6b7c3ca..5fe525a 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -187,6 +187,7 @@ static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 	.gamma_set = intel_crtc_fb_gamma_set,
 	.gamma_get = intel_crtc_fb_gamma_get,
 	.fb_probe = intelfb_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 static void intel_fbdev_destroy(struct drm_device *dev,
diff --git a/drivers/gpu/drm/mgag200/mgag200_fb.c b/drivers/gpu/drm/mgag200/mgag200_fb.c
index 5da824c..1720316 100644
--- a/drivers/gpu/drm/mgag200/mgag200_fb.c
+++ b/drivers/gpu/drm/mgag200/mgag200_fb.c
@@ -275,6 +275,7 @@ static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
 	.gamma_set = mga_crtc_fb_gamma_set,
 	.gamma_get = mga_crtc_fb_gamma_get,
 	.fb_probe = mgag200fb_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 int mgag200_fbdev_init(struct mga_device *mdev)
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index b035317..2a280d8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -435,6 +435,7 @@ static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 	.gamma_set = nouveau_fbcon_gamma_set,
 	.gamma_get = nouveau_fbcon_gamma_get,
 	.fb_probe = nouveau_fbcon_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 
diff --git a/drivers/gpu/drm/omapdrm/omap_fbdev.c b/drivers/gpu/drm/omapdrm/omap_fbdev.c
index 002988d..33f27ac 100644
--- a/drivers/gpu/drm/omapdrm/omap_fbdev.c
+++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c
@@ -283,6 +283,7 @@ fail:
 
 static struct drm_fb_helper_funcs omap_fb_helper_funcs = {
 	.fb_probe = omap_fbdev_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 static struct drm_fb_helper *get_fb(struct fb_info *fbi)
diff --git a/drivers/gpu/drm/qxl/qxl_fb.c b/drivers/gpu/drm/qxl/qxl_fb.c
index 4b955b0..a274c16 100644
--- a/drivers/gpu/drm/qxl/qxl_fb.c
+++ b/drivers/gpu/drm/qxl/qxl_fb.c
@@ -521,6 +521,7 @@ static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
 
 static struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
 	.fb_probe = qxl_fb_find_or_create_single,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 int qxl_fbdev_init(struct qxl_device *qdev)
diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index b174674..2b1b211 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -335,6 +335,7 @@ static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 	.gamma_set = radeon_crtc_fb_gamma_set,
 	.gamma_get = radeon_crtc_fb_gamma_get,
 	.fb_probe = radeonfb_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 int radeon_fbdev_init(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index 97e9d61..878c602 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -546,6 +546,7 @@ out:
 
 static struct drm_fb_helper_funcs udl_fb_helper_funcs = {
 	.fb_probe = udlfb_create,
+	.restore_fbdev_mode = drm_fb_helper_restore_fbdev_mode,
 };
 
 static void udl_fbdev_destroy(struct drm_device *dev,
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 471f276..146abb6 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -58,6 +58,7 @@ struct drm_fb_helper_surface_size {
  *            structure. Futhermore it also needs to allocate the drm
  *            framebuffer used to back the fbdev.
  * @initial_config: Setup an initial fbdev display configuration
+ * @restore_fbdev_mode: Restore the fbdev display configuration (eg. to show an oops)
  *
  * Driver callbacks used by the fbdev emulation helper library.
  */
@@ -73,6 +74,7 @@ struct drm_fb_helper_funcs {
 			       struct drm_fb_helper_crtc **crtcs,
 			       struct drm_display_mode **modes,
 			       bool *enabled, int width, int height);
+	bool (*restore_fbdev_mode)(struct drm_fb_helper *fb_helper);
 };
 
 struct drm_fb_helper_connector {
-- 
1.8.1.5

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