[PATCH 6/9] drm/exynos: update exynos_drm_framebuffer_init() for multiple buffers

[Joonyoung Shim]

This modifies exynos_drm_framebuffer_init() to be possible to support
multiple buffers. Then it can be used by exynos_user_fb_create().

Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fb.c    | 36 +++++++++++++++++--------------
 drivers/gpu/drm/exynos/exynos_drm_fb.h    |  5 ++++-
 drivers/gpu/drm/exynos/exynos_drm_fbdev.c |  3 +--
 3 files changed, 25 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c 
b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index 5cee148..8e5d3eb 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -23,7 +23,6 @@
 #include "exynos_drm_drv.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_fbdev.h"
-#include "exynos_drm_gem.h"
 #include "exynos_drm_iommu.h"
 #include "exynos_drm_crtc.h"

@@ -134,36 +133,41 @@ unsigned int exynos_drm_fb_get_buf_cnt(struct 
drm_framebuffer *fb)
 struct drm_framebuffer *
 exynos_drm_framebuffer_init(struct drm_device *dev,
                            struct drm_mode_fb_cmd2 *mode_cmd,
-                           struct drm_gem_object *obj)
+                           struct exynos_drm_gem_obj **gem_obj,
+                           int count)
 {
        struct exynos_drm_fb *exynos_fb;
-       struct exynos_drm_gem_obj *exynos_gem_obj;
+       int i;
        int ret;

-       exynos_gem_obj = to_exynos_gem_obj(obj);
-
-       ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
-       if (ret < 0)
-               return ERR_PTR(ret);
-
        exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
        if (!exynos_fb)
                return ERR_PTR(-ENOMEM);

-       drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
-       exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
+       exynos_fb->buf_cnt = count;
+       DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);

-       /* buffer count to framebuffer always is 1 at booting time. */
-       exynos_fb->buf_cnt = 1;
+       for (i = 0; i < count; i++) {
+               ret = check_fb_gem_memory_type(dev, gem_obj[i]);
+               if (ret < 0)
+                       goto err;
+
+               exynos_fb->exynos_gem_obj[i] = gem_obj[i];
+       }
+
+       drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);

        ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
-       if (ret) {
-               kfree(exynos_fb);
+       if (ret < 0) {
                DRM_ERROR("failed to initialize framebuffer\n");
-               return ERR_PTR(ret);
+               goto err;
        }

        return &exynos_fb->fb;
+
+err:
+       kfree(exynos_fb);
+       return ERR_PTR(ret);
 }

 static struct drm_framebuffer *
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.h 
b/drivers/gpu/drm/exynos/exynos_drm_fb.h
index 897d2cf..8900f6b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.h
@@ -14,10 +14,13 @@
 #ifndef _EXYNOS_DRM_FB_H_
 #define _EXYNOS_DRM_FB_H

+#include "exynos_drm_gem.h"
+
 struct drm_framebuffer *
 exynos_drm_framebuffer_init(struct drm_device *dev,
                            struct drm_mode_fb_cmd2 *mode_cmd,
-                           struct drm_gem_object *obj);
+                           struct exynos_drm_gem_obj **gem_obj,
+                           int count);

 /* get gem object of a drm framebuffer */
 struct exynos_drm_gem_obj *exynos_drm_fb_gem_obj(struct drm_framebuffer *fb,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c 
b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index 133cf5f..a221f75 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -21,7 +21,6 @@
 #include "exynos_drm_drv.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_fbdev.h"
-#include "exynos_drm_gem.h"
 #include "exynos_drm_iommu.h"

 #define MAX_CONNECTOR          4
@@ -160,7 +159,7 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper 
*helper,

        exynos_fbdev->obj = obj;

-       helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, &obj->base);
+       helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, &obj, 1);
        if (IS_ERR(helper->fb)) {
                DRM_ERROR("failed to create drm framebuffer.\n");
                ret = PTR_ERR(helper->fb);
-- 
1.9.1