1 files changed, 46 insertions, 31 deletions

diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index 19014b2..7e5f887 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -46,12 +46,13 @@
 
 #define ROUND_DOWN(value,boundary)	((value) & (~((boundary)-1)))
 
+static unsigned long omap_sram_start;
 static unsigned long omap_sram_base;
 static unsigned long omap_sram_size;
 static unsigned long omap_sram_ceil;
 
-unsigned long omap_fb_sram_start;
-unsigned long omap_fb_sram_size;
+int	omap_fb_sram_plane = -1;
+int	omap_fb_sram_valid;
 
 /* Depending on the target RAMFS firewall setup, the public usable amount of
  * SRAM varies.  The default accessable size for all device types is 2k. A GP
@@ -77,30 +78,43 @@ static int is_sram_locked(void)
 		return 1; /* assume locked with no PPA or security driver */
 }
 
-void get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
-		      unsigned long *start, unsigned long *size)
+static int get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
+			      unsigned long *start, int *plane_idx)
 {
 	const struct omap_fbmem_config *fbmem_conf;
-
-	fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
-	if (fbmem_conf != NULL) {
-		*start = fbmem_conf->fb_sram_start;
-		*size = fbmem_conf->fb_sram_size;
-	} else {
-		*size = 0;
-		*start = 0;
+	unsigned long size = 0;
+	int i;
+
+	i = 0;
+	*start = 0;
+	*plane_idx = -1;
+	while ((fbmem_conf = omap_get_nr_config(OMAP_TAG_FBMEM,
+				struct omap_fbmem_config, i)) != NULL) {
+		u32 paddr, end;
+
+		paddr = fbmem_conf->start;
+		end = fbmem_conf->start + fbmem_conf->size;
+		if (paddr > omap_sram_start &&
+		    paddr < omap_sram_start + omap_sram_size) {
+			if (*plane_idx != -1 || paddr < start_avail ||
+			    paddr == end ||
+			    end > start_avail + size_avail) {
+				printk(KERN_ERR "invalid FB SRAM configuration");
+				*start = 0;
+				return -1;
+			}
+			*plane_idx = i;
+			*start = fbmem_conf->start;
+			size = fbmem_conf->size;
+		}
+		i++;
 	}
 
-	if (*size && (
-	    *start < start_avail ||
-	    *start + *size > start_avail + size_avail)) {
-		printk(KERN_ERR "invalid FB SRAM configuration\n");
-		*start = start_avail;
-		*size = size_avail;
-	}
+	if (*plane_idx >= 0)
+		pr_info("Reserving %lu bytes SRAM frame buffer "
+			"for plane %d\n", size, *plane_idx);
 
-	if (*size)
-		pr_info("Reserving %lu bytes SRAM for frame buffer\n", *size);
+	return 0;
 }
 
 /*
@@ -111,16 +125,16 @@ void get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
  */
 void __init omap_detect_sram(void)
 {
-	unsigned long sram_start;
+	unsigned long fb_sram_start;
 
 	if (cpu_is_omap24xx()) {
 		if (is_sram_locked()) {
 			omap_sram_base = OMAP2_SRAM_PUB_VA;
-			sram_start = OMAP2_SRAM_PUB_PA;
+			omap_sram_start = OMAP2_SRAM_PUB_PA;
 			omap_sram_size = 0x800; /* 2K */
 		} else {
 			omap_sram_base = OMAP2_SRAM_VA;
-			sram_start = OMAP2_SRAM_PA;
+			omap_sram_start = OMAP2_SRAM_PA;
 			if (cpu_is_omap242x())
 				omap_sram_size = 0xa0000; /* 640K */
 			else if (cpu_is_omap243x())
@@ -128,7 +142,7 @@ void __init omap_detect_sram(void)
 		}
 	} else {
 		omap_sram_base = OMAP1_SRAM_VA;
-		sram_start = OMAP1_SRAM_PA;
+		omap_sram_start = OMAP1_SRAM_PA;
 
 		if (cpu_is_omap730())
 			omap_sram_size = 0x32000;	/* 200K */
@@ -144,12 +158,13 @@ void __init omap_detect_sram(void)
 			omap_sram_size = 0x4000;
 		}
 	}
-	get_fb_sram_conf(sram_start + SRAM_BOOTLOADER_SZ,
-			 omap_sram_size - SRAM_BOOTLOADER_SZ,
-			 &omap_fb_sram_start, &omap_fb_sram_size);
-	if (omap_fb_sram_size)
-		omap_sram_size -= sram_start + omap_sram_size -
-				  omap_fb_sram_start;
+	if (get_fb_sram_conf(omap_sram_start + SRAM_BOOTLOADER_SZ,
+			    omap_sram_size - SRAM_BOOTLOADER_SZ,
+			    &fb_sram_start, &omap_fb_sram_plane) == 0)
+		omap_fb_sram_valid = 1;
+	if (omap_fb_sram_valid && omap_fb_sram_plane >= 0)
+		omap_sram_size -= omap_sram_start + omap_sram_size -
+				  fb_sram_start;
 	omap_sram_ceil = omap_sram_base + omap_sram_size;
 }