drm/kms: move driver specific fb common code to helper functions (v2)
Initially I always meant this code to be shared, but things
ran away from me before I got to it.
This refactors the i915 and radeon kms fbdev interaction layers
out into generic helpers + driver specific pieces.
It moves all the panic/sysrq enhancements to the core file,
and stores a linked list of kernel fbs. This could possibly be
improved to only store the fb which has fbcon on it for panics
etc.
radeon retains some specific codes used for a big endian
workaround.
changes:
fix oops in v1
fix freeing path for crtc_info
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
new file mode 100644
index 0000000..88fffbd
--- /dev/null
+++ b/include/drm/drm_fb_helper.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2006-2009 Red Hat Inc.
+ * Copyright (c) 2006-2008 Intel Corporation
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ *
+ * DRM framebuffer helper functions
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ * Dave Airlie <airlied@linux.ie>
+ * Jesse Barnes <jesse.barnes@intel.com>
+ */
+#ifndef DRM_FB_HELPER_H
+#define DRM_FB_HELPER_H
+
+struct drm_fb_helper_crtc {
+ uint32_t crtc_id;
+ struct drm_mode_set mode_set;
+};
+
+struct drm_fb_helper_funcs {
+ void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
+ u16 blue, int regno);
+};
+
+struct drm_fb_helper {
+ struct drm_framebuffer *fb;
+ struct drm_device *dev;
+ struct drm_display_mode *mode;
+ int crtc_count;
+ struct drm_fb_helper_crtc *crtc_info;
+ struct drm_fb_helper_funcs *funcs;
+ int conn_limit;
+ struct list_head kernel_fb_list;
+};
+
+int drm_fb_helper_single_fb_probe(struct drm_device *dev,
+ int (*fb_create)(struct drm_device *dev,
+ uint32_t fb_width,
+ uint32_t fb_height,
+ uint32_t surface_width,
+ uint32_t surface_height,
+ struct drm_framebuffer **fb_ptr));
+int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count,
+ int max_conn);
+void drm_fb_helper_free(struct drm_fb_helper *helper);
+int drm_fb_helper_blank(int blank, struct fb_info *info);
+int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+int drm_fb_helper_set_par(struct fb_info *info);
+int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+int drm_fb_helper_setcolreg(unsigned regno,
+ unsigned red,
+ unsigned green,
+ unsigned blue,
+ unsigned transp,
+ struct fb_info *info);
+
+void drm_fb_helper_restore(void);
+void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb,
+ uint32_t fb_width, uint32_t fb_height);
+void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch);
+
+#endif