mirror of https://github.com/hak5/openwrt.git
126 lines
3.2 KiB
Diff
126 lines
3.2 KiB
Diff
From ceb70800efa2f4c92f0c89bf472005decd577d65 Mon Sep 17 00:00:00 2001
|
|
From: Luke Diamand <luked@broadcom.com>
|
|
Date: Tue, 31 Dec 2013 23:07:36 +0000
|
|
Subject: [PATCH 148/196] bcm2708_fb: report number of dma copies
|
|
|
|
Add a counter (exported via debugfs) reporting the
|
|
number of dma copies that the framebuffer driver
|
|
has done, in order to help evaluate different
|
|
optimization strategies.
|
|
|
|
Signed-off-by: Luke Diamand <luked@broadcom.com>
|
|
---
|
|
drivers/video/bcm2708_fb.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 55 insertions(+)
|
|
|
|
diff --git a/drivers/video/bcm2708_fb.c b/drivers/video/bcm2708_fb.c
|
|
index c10c5ee..4d7d963 100644
|
|
--- a/drivers/video/bcm2708_fb.c
|
|
+++ b/drivers/video/bcm2708_fb.c
|
|
@@ -27,6 +27,7 @@
|
|
#include <linux/clk.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/console.h>
|
|
+#include <linux/debugfs.h>
|
|
|
|
#include <mach/dma.h>
|
|
#include <mach/platform.h>
|
|
@@ -58,6 +59,12 @@ struct fbinfo_s {
|
|
u16 cmap[256];
|
|
};
|
|
|
|
+struct bcm2708_fb_stats {
|
|
+ struct debugfs_regset32 regset;
|
|
+ u32 dma_copies;
|
|
+ u32 dma_irqs;
|
|
+};
|
|
+
|
|
struct bcm2708_fb {
|
|
struct fb_info fb;
|
|
struct platform_device *dev;
|
|
@@ -69,10 +76,51 @@ struct bcm2708_fb {
|
|
void __iomem *dma_chan_base;
|
|
void *cb_base; /* DMA control blocks */
|
|
dma_addr_t cb_handle;
|
|
+ struct dentry *debugfs_dir;
|
|
+ struct bcm2708_fb_stats stats;
|
|
};
|
|
|
|
#define to_bcm2708(info) container_of(info, struct bcm2708_fb, fb)
|
|
|
|
+static void bcm2708_fb_debugfs_deinit(struct bcm2708_fb *fb)
|
|
+{
|
|
+ debugfs_remove_recursive(fb->debugfs_dir);
|
|
+ fb->debugfs_dir = NULL;
|
|
+}
|
|
+
|
|
+static int bcm2708_fb_debugfs_init(struct bcm2708_fb *fb)
|
|
+{
|
|
+ static struct debugfs_reg32 stats_registers[] = {
|
|
+ {
|
|
+ "dma_copies",
|
|
+ offsetof(struct bcm2708_fb_stats, dma_copies)
|
|
+ },
|
|
+ };
|
|
+
|
|
+ fb->debugfs_dir = debugfs_create_dir(DRIVER_NAME, NULL);
|
|
+ if (!fb->debugfs_dir) {
|
|
+ pr_warn("%s: could not create debugfs entry\n",
|
|
+ __func__);
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ fb->stats.regset.regs = stats_registers;
|
|
+ fb->stats.regset.nregs = ARRAY_SIZE(stats_registers);
|
|
+ fb->stats.regset.base = &fb->stats;
|
|
+
|
|
+ if (!debugfs_create_regset32(
|
|
+ "stats", 0444, fb->debugfs_dir, &fb->stats.regset)) {
|
|
+ pr_warn("%s: could not create statistics registers\n",
|
|
+ __func__);
|
|
+ goto fail;
|
|
+ }
|
|
+ return 0;
|
|
+
|
|
+fail:
|
|
+ bcm2708_fb_debugfs_deinit(fb);
|
|
+ return -EFAULT;
|
|
+}
|
|
+
|
|
static int bcm2708_fb_set_bitfields(struct fb_var_screeninfo *var)
|
|
{
|
|
int ret = 0;
|
|
@@ -443,8 +491,10 @@ static void bcm2708_fb_copyarea(struct fb_info *info,
|
|
/* end of dma control blocks chain */
|
|
cb->next = 0;
|
|
|
|
+
|
|
bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
|
|
bcm_dma_wait_idle(fb->dma_chan_base);
|
|
+ fb->stats.dma_copies++;
|
|
}
|
|
|
|
static void bcm2708_fb_imageblit(struct fb_info *info,
|
|
@@ -552,6 +602,9 @@ static int bcm2708_fb_probe(struct platform_device *dev)
|
|
}
|
|
memset(fb, 0, sizeof(struct bcm2708_fb));
|
|
|
|
+
|
|
+ bcm2708_fb_debugfs_init(fb);
|
|
+
|
|
fb->cb_base = dma_alloc_writecombine(&dev->dev, SZ_64K,
|
|
&fb->cb_handle, GFP_KERNEL);
|
|
if (!fb->cb_base) {
|
|
@@ -607,6 +660,8 @@ static int bcm2708_fb_remove(struct platform_device *dev)
|
|
|
|
dma_free_coherent(NULL, PAGE_ALIGN(sizeof(*fb->info)), (void *)fb->info,
|
|
fb->dma);
|
|
+ bcm2708_fb_debugfs_deinit(fb);
|
|
+
|
|
kfree(fb);
|
|
|
|
return 0;
|
|
--
|
|
1.9.1
|
|
|