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authorRichard Purdie <rpurdie@linux.intel.com>2010-08-27 15:14:24 +0100
committerRichard Purdie <rpurdie@linux.intel.com>2010-08-27 15:29:45 +0100
commit29d6678fd546377459ef75cf54abeef5b969b5cf (patch)
tree8edd65790e37a00d01c3f203f773fe4b5012db18 /meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0049-DSS2-VRAM-clear-allocated-area-with-DMA.patch
parentda49de6885ee1bc424e70bc02f21f6ab920efb55 (diff)
downloadpoky-29d6678fd546377459ef75cf54abeef5b969b5cf.tar.gz
Major layout change to the packages directory
Having one monolithic packages directory makes it hard to find things and is generally overwhelming. This commit splits it into several logical sections roughly based on function, recipes.txt gives more information about the classifications used. The opportunity is also used to switch from "packages" to "recipes" as used in OpenEmbedded as the term "packages" can be confusing to people and has many different meanings. Not all recipes have been classified yet, this is just a first pass at separating things out. Some packages are moved to meta-extras as they're no longer actively used or maintained. Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0049-DSS2-VRAM-clear-allocated-area-with-DMA.patch')
-rw-r--r--meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0049-DSS2-VRAM-clear-allocated-area-with-DMA.patch101
1 files changed, 101 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0049-DSS2-VRAM-clear-allocated-area-with-DMA.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0049-DSS2-VRAM-clear-allocated-area-with-DMA.patch
new file mode 100644
index 0000000000..e9fc76ce15
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0049-DSS2-VRAM-clear-allocated-area-with-DMA.patch
@@ -0,0 +1,101 @@
1From 02034cc79f69512a6037f03ad1243c28f59fdd8a Mon Sep 17 00:00:00 2001
2From: Tomi Valkeinen <tomi.valkeinen@nokia.com>
3Date: Wed, 22 Apr 2009 10:25:20 +0300
4Subject: [PATCH] DSS2: VRAM: clear allocated area with DMA
5
6Use DMA constant fill feature to clear VRAM area when
7someone allocates it.
8---
9 arch/arm/plat-omap/vram.c | 57 +++++++++++++++++++++++++++++++++++++++++++++
10 1 files changed, 57 insertions(+), 0 deletions(-)
11
12diff --git a/arch/arm/plat-omap/vram.c b/arch/arm/plat-omap/vram.c
13index 8e9fe77..90276ac 100644
14--- a/arch/arm/plat-omap/vram.c
15+++ b/arch/arm/plat-omap/vram.c
16@@ -31,11 +31,13 @@
17 #include <linux/seq_file.h>
18 #include <linux/bootmem.h>
19 #include <linux/omapfb.h>
20+#include <linux/completion.h>
21
22 #include <asm/setup.h>
23
24 #include <mach/sram.h>
25 #include <mach/vram.h>
26+#include <mach/dma.h>
27
28 #ifdef DEBUG
29 #define DBG(format, ...) printk(KERN_DEBUG "VRAM: " format, ## __VA_ARGS__)
30@@ -276,6 +278,59 @@ int omap_vram_reserve(unsigned long paddr, size_t size)
31 }
32 EXPORT_SYMBOL(omap_vram_reserve);
33
34+static void _omap_vram_dma_cb(int lch, u16 ch_status, void *data)
35+{
36+ struct completion *compl = data;
37+ complete(compl);
38+}
39+
40+static int _omap_vram_clear(u32 paddr, unsigned pages)
41+{
42+ struct completion compl;
43+ unsigned elem_count;
44+ unsigned frame_count;
45+ int r;
46+ int lch;
47+
48+ init_completion(&compl);
49+
50+ r = omap_request_dma(OMAP_DMA_NO_DEVICE, "VRAM DMA",
51+ _omap_vram_dma_cb,
52+ &compl, &lch);
53+ if (r) {
54+ pr_err("VRAM: request_dma failed for memory clear\n");
55+ return -EBUSY;
56+ }
57+
58+ elem_count = pages * PAGE_SIZE / 4;
59+ frame_count = 1;
60+
61+ omap_set_dma_transfer_params(lch, OMAP_DMA_DATA_TYPE_S32,
62+ elem_count, frame_count,
63+ OMAP_DMA_SYNC_ELEMENT,
64+ 0, 0);
65+
66+ omap_set_dma_dest_params(lch, 0, OMAP_DMA_AMODE_POST_INC,
67+ paddr, 0, 0);
68+
69+ omap_set_dma_color_mode(lch, OMAP_DMA_CONSTANT_FILL, 0x000000);
70+
71+ omap_start_dma(lch);
72+
73+ if (wait_for_completion_timeout(&compl, msecs_to_jiffies(1000)) == 0) {
74+ omap_stop_dma(lch);
75+ pr_err("VRAM: dma timeout while clearing memory\n");
76+ r = -EIO;
77+ goto err;
78+ }
79+
80+ r = 0;
81+err:
82+ omap_free_dma(lch);
83+
84+ return r;
85+}
86+
87 static int _omap_vram_alloc(int mtype, unsigned pages, unsigned long *paddr)
88 {
89 struct vram_region *rm;
90@@ -313,6 +368,8 @@ found:
91
92 *paddr = start;
93
94+ _omap_vram_clear(start, pages);
95+
96 return 0;
97 }
98
99--
1001.5.6.5
101