[PATCH 10/10] convert to using crtc->fb for BIOS fb management

[Jesse Barnes <jbarnes@virtuousgeek.org>]

Along with refcounting changes and breakage.
---
 drivers/gpu/drm/i915/i915_gem_stolen.c |  2 ++
 drivers/gpu/drm/i915/intel_display.c   | 39 ++++++++++++++++++----------------
 drivers/gpu/drm/i915/intel_drv.h       |  1 -
 drivers/gpu/drm/i915/intel_fbdev.c     | 19 ++++-------------
 4 files changed, 27 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index d284d89..c1625e6 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -420,6 +420,8 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
 
 	list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
 	list_add_tail(&vma->mm_list, &ggtt->inactive_list);
+	/* the vma also holds a pages reference */
+	i915_gem_object_pin_pages(obj);
 
 	return obj;
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 97acb01..e5821a0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5508,13 +5508,14 @@ static void i9xx_get_plane_config(struct intel_crtc *crtc,
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_gem_object *obj = NULL;
 	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
+	struct intel_framebuffer *fb;
 	u32 val, base, offset;
 	int pipe = crtc->pipe, plane = crtc->plane;
 	int fourcc, pixel_format;
 	int aligned_height;
 
-	plane_config->fb = kzalloc(sizeof(*plane_config->fb), GFP_KERNEL);
-	if (!plane_config->fb) {
+	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+	if (!fb) {
 		DRM_DEBUG_KMS("failed to alloc fb\n");
 		return;
 	}
@@ -5527,8 +5528,8 @@ static void i9xx_get_plane_config(struct intel_crtc *crtc,
 
 	pixel_format = val & DISPPLANE_PIXFORMAT_MASK;
 	fourcc = intel_format_to_fourcc(pixel_format);
-	plane_config->fb->base.pixel_format = fourcc;
-	plane_config->fb->base.bits_per_pixel =
+	fb->base.pixel_format = fourcc;
+	fb->base.bits_per_pixel =
 		drm_format_plane_cpp(fourcc, 0) * 8;
 
 	if (INTEL_INFO(dev)->gen >= 4) {
@@ -5542,23 +5543,23 @@ static void i9xx_get_plane_config(struct intel_crtc *crtc,
 	}
 
 	val = I915_READ(PIPESRC(pipe));
-	plane_config->fb->base.width = ((val >> 16) & 0xfff) + 1;
-	plane_config->fb->base.height = ((val >> 0) & 0xfff) + 1;
+	fb->base.width = ((val >> 16) & 0xfff) + 1;
+	fb->base.height = ((val >> 0) & 0xfff) + 1;
 
 	val = I915_READ(DSPSTRIDE(pipe));
-	plane_config->fb->base.pitches[0] = val & 0xffffff80;
+	fb->base.pitches[0] = val & 0xffffff80;
 
-	aligned_height = intel_align_height(dev, plane_config->fb->base.height,
+	aligned_height = intel_align_height(dev, fb->base.height,
 					    plane_config->tiled);
 
-	plane_config->size = ALIGN(plane_config->fb->base.pitches[0] *
+	plane_config->size = ALIGN(fb->base.pitches[0] *
 				   aligned_height, PAGE_SIZE);
 
 	DRM_DEBUG_KMS("pipe/plane %d/%d with fb: size=%dx%d@%d, offset=%x, pitch %d, size 0x%x\n",
-		      pipe, plane, plane_config->fb->base.width,
-		      plane_config->fb->base.height,
-		      plane_config->fb->base.bits_per_pixel, base,
-		      plane_config->fb->base.pitches[0],
+		      pipe, plane, fb->base.width,
+		      fb->base.height,
+		      fb->base.bits_per_pixel, base,
+		      fb->base.pitches[0],
 		      plane_config->size);
 
 	/*
@@ -5571,19 +5572,21 @@ static void i9xx_get_plane_config(struct intel_crtc *crtc,
 		return;
 
 	mode_cmd.pixel_format = fourcc;
-	mode_cmd.width = plane_config->fb->base.width;
-	mode_cmd.height = plane_config->fb->base.height;
-	mode_cmd.pitches[0] = plane_config->fb->base.pitches[0];
+	mode_cmd.width = fb->base.width;
+	mode_cmd.height = fb->base.height;
+	mode_cmd.pitches[0] = fb->base.pitches[0];
 
 	mutex_lock(&dev->struct_mutex);
 
-	if (intel_framebuffer_init(dev, plane_config->fb, &mode_cmd, obj)) {
+	if (intel_framebuffer_init(dev, fb, &mode_cmd, obj)) {
 		DRM_DEBUG_KMS("intel fb init failed\n");
 		goto out_unref_obj;
 	}
 
+	crtc->base.fb = &fb->base;
+
 	mutex_unlock(&dev->struct_mutex);
-	DRM_DEBUG_KMS("plane fb obj %p\n", plane_config->fb->obj);
+	DRM_DEBUG_KMS("plane fb obj %p\n", fb->obj);
 	return;
 
 out_unref_obj:
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d849a5c..a40109e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -211,7 +211,6 @@ typedef struct dpll {
 } intel_clock_t;
 
 struct intel_plane_config {
-	struct intel_framebuffer *fb; /* ends up managed by intel_fbdev.c */
 	bool tiled;
 	int size;
 };
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index a3e8156..2cbfe72 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -388,7 +388,7 @@ static bool intel_fbdev_init_bios(struct drm_device *dev,
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		intel_crtc = to_intel_crtc(crtc);
 
-		if (!intel_crtc->active || !intel_crtc->plane_config.fb) {
+		if (!intel_crtc->active || !crtc->fb) {
 			DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 				      pipe_name(intel_crtc->pipe));
 			continue;
@@ -397,27 +397,16 @@ static bool intel_fbdev_init_bios(struct drm_device *dev,
 		if (intel_crtc->plane_config.size > last_size) {
 			plane_config = &intel_crtc->plane_config;
 			last_size = plane_config->size;
-			fb = plane_config->fb;
+			fb = to_intel_framebuffer(crtc->fb);
 		}
 	}
 
-	/* Free unused fbs */
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		struct intel_framebuffer *cur_fb;
-
-		intel_crtc = to_intel_crtc(crtc);
-		cur_fb = intel_crtc->plane_config.fb;
-
-		if (cur_fb && cur_fb != fb)
-			intel_framebuffer_fini(cur_fb);
-	}
-
 	if (!fb) {
 		DRM_DEBUG_KMS("no active pipes found, not using BIOS config\n");
 		goto out_free;
 	}
 
-	ifbdev->preferred_bpp = plane_config->fb->base.bits_per_pixel;
+	ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 	ifbdev->helper.funcs = &intel_fb_helper_funcs;
 	ifbdev->helper.funcs->initial_config = intel_fb_initial_config;
 	ifbdev->fb = fb;
@@ -437,7 +426,7 @@ static bool intel_fbdev_init_bios(struct drm_device *dev,
 			goto out_unref_obj;
 
 		crtc->fb = &fb->base;
-		drm_gem_object_reference(&fb->obj->base);
+		/* Take a private ref on the fb for fbdev */
 		drm_framebuffer_reference(&fb->base);
 	}
 
-- 
1.8.4.2