diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0062-glamo-cmdqueue-bandaid.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0062-glamo-cmdqueue-bandaid.patch.patch | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0062-glamo-cmdqueue-bandaid.patch.patch b/target/linux/s3c24xx/patches/0062-glamo-cmdqueue-bandaid.patch.patch new file mode 100755 index 0000000000..96ec17c499 --- /dev/null +++ b/target/linux/s3c24xx/patches/0062-glamo-cmdqueue-bandaid.patch.patch @@ -0,0 +1,81 @@ +From 08f211e0775ee1e29993fd072968e17a51c5ec14 Mon Sep 17 00:00:00 2001 +From: mokopatches <mokopatches@openmoko.org> +Date: Fri, 25 Jul 2008 23:05:22 +0100 +Subject: [PATCH] glamo-cmdqueue-bandaid.patch + [ Stop kernel from hanging every once in a while during Glamo + initialization. ] + +debug-glamo-fb-cmdqueue-wait-timeout.patch + +From: warmcat <andy@warmcat.com> +--- + drivers/mfd/glamo/glamo-fb.c | 30 +++++++++++++++++++++++++++--- + 1 files changed, 27 insertions(+), 3 deletions(-) + +diff --git a/drivers/mfd/glamo/glamo-fb.c b/drivers/mfd/glamo/glamo-fb.c +index 394a0ad..f0d7600 100644 +--- a/drivers/mfd/glamo/glamo-fb.c ++++ b/drivers/mfd/glamo/glamo-fb.c +@@ -553,12 +553,20 @@ static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb) + + void glamofb_cmd_mode(struct glamofb_handle *gfb, int on) + { ++ int timeout = 2000; ++ + dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on); + if (on) { + dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ", + __FUNCTION__); +- while (!glamofb_cmdq_empty(gfb)) ++ while ((!glamofb_cmdq_empty(gfb)) && (timeout--)) + yield(); ++ if (timeout < 0) { ++ printk(KERN_ERR"*************" ++ "glamofb cmd_queue never got empty" ++ "*************\n"); ++ return; ++ } + dev_dbg(gfb->dev, "empty!\n"); + + /* display the entire frame then switch to command */ +@@ -568,8 +576,16 @@ void glamofb_cmd_mode(struct glamofb_handle *gfb, int on) + + /* wait until LCD is idle */ + dev_dbg(gfb->dev, "waiting for LCD idle: "); +- while (!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) ++ timeout = 2000; ++ while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) && ++ (timeout--)) + yield(); ++ if (timeout < 0) { ++ printk(KERN_ERR"*************" ++ "glamofb lcd never idle" ++ "*************\n"); ++ return; ++ } + dev_dbg(gfb->dev, "idle!\n"); + + msleep(90); +@@ -589,10 +605,18 @@ EXPORT_SYMBOL_GPL(glamofb_cmd_mode); + + int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val) + { ++ int timeout = 2000; ++ + dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", + __FUNCTION__); +- while (!glamofb_cmdq_empty(gfb)) ++ while ((!glamofb_cmdq_empty(gfb)) && (timeout--)) + yield(); ++ if (timeout < 0) { ++ printk(KERN_ERR"*************" ++ "glamofb cmd_queue never got empty" ++ "*************\n"); ++ return 1; ++ } + dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val); + + reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val); +-- +1.5.6.3 + |