[3.13.y-ckt stable] Patch "drm/ast: Initialized data needed to map fbdev memory" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    drm/ast: Initialized data needed to map fbdev memory

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt31.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 4b17186590f8e4e9c520043304a3e1b809622360 Mon Sep 17 00:00:00 2001
From: Egbert Eich <eich at suse.de>
Date: Wed, 11 Jun 2014 14:59:55 +0200
Subject: drm/ast: Initialized data needed to map fbdev memory

commit 28fb4cb7fa6f63dc2fbdb5f2564dcbead8e3eee0 upstream.

Due to a missing initialization there was no way to map fbdev memory.
Thus for example using the Xserver with the fbdev driver failed.
This fix adds initialization for fix.smem_start and fix.smem_len
in the fb_info structure, which fixes this problem.

Requested-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Signed-off-by: Egbert Eich <eich at suse.de>
[pulled from SuSE tree by me - airlied]
Signed-off-by: Dave Airlie <airlied at redhat.com>

Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/ast/ast_drv.h  | 1 +
 drivers/gpu/drm/ast/ast_fb.c   | 7 +++++++
 drivers/gpu/drm/ast/ast_main.c | 1 +
 drivers/gpu/drm/ast/ast_mode.c | 2 ++
 4 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 9833a1b..3fc1223 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -296,6 +296,7 @@ int ast_framebuffer_init(struct drm_device *dev,
 int ast_fbdev_init(struct drm_device *dev);
 void ast_fbdev_fini(struct drm_device *dev);
 void ast_fbdev_set_suspend(struct drm_device *dev, int state);
+void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr);

 struct ast_bo {
 	struct ttm_buffer_object bo;
diff --git a/drivers/gpu/drm/ast/ast_fb.c b/drivers/gpu/drm/ast/ast_fb.c
index a28640f..b55b6b1 100644
--- a/drivers/gpu/drm/ast/ast_fb.c
+++ b/drivers/gpu/drm/ast/ast_fb.c
@@ -367,3 +367,10 @@ void ast_fbdev_set_suspend(struct drm_device *dev, int state)

 	fb_set_suspend(ast->fbdev->helper.fbdev, state);
 }
+
+void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
+{
+	ast->fbdev->helper.fbdev->fix.smem_start =
+		ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
+	ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
+}
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 4e09386..45bb8e8 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -360,6 +360,7 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
 	dev->mode_config.min_height = 0;
 	dev->mode_config.preferred_depth = 24;
 	dev->mode_config.prefer_shadow = 1;
+	dev->mode_config.fb_base = pci_resource_start(ast->dev->pdev, 0);

 	if (ast->chip == AST2100 ||
 	    ast->chip == AST2200 ||
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index e8f6418..f3a54ad 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -509,6 +509,8 @@ static int ast_crtc_do_set_base(struct drm_crtc *crtc,
 		ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
 		if (ret)
 			DRM_ERROR("failed to kmap fbcon\n");
+		else
+			ast_fbdev_set_base(ast, gpu_addr);
 	}
 	ast_bo_unreserve(bo);

--
1.9.1