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fc54b9bf15
(stable-branch of Openmoko) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13613 3c298f89-4303-0410-b956-a3cf2f4a3e73
82 lines
2.4 KiB
Diff
82 lines
2.4 KiB
Diff
From ce8eaeee7875e668be4c2888fa05a61a5af0dd98 Mon Sep 17 00:00:00 2001
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From: mokopatches <mokopatches@openmoko.org>
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Date: Sun, 13 Apr 2008 07:23:59 +0100
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Subject: [PATCH] glamo-cmdqueue-bandaid.patch
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[ Stop kernel from hanging every once in a while during Glamo
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initialization. ]
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debug-glamo-fb-cmdqueue-wait-timeout.patch
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From: warmcat <andy@warmcat.com>
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---
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drivers/mfd/glamo/glamo-fb.c | 30 +++++++++++++++++++++++++++---
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1 files changed, 27 insertions(+), 3 deletions(-)
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diff --git a/drivers/mfd/glamo/glamo-fb.c b/drivers/mfd/glamo/glamo-fb.c
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index 394a0ad..f0d7600 100644
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--- a/drivers/mfd/glamo/glamo-fb.c
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+++ b/drivers/mfd/glamo/glamo-fb.c
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@@ -553,12 +553,20 @@ static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
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void glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
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{
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+ int timeout = 2000;
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+
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dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
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if (on) {
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dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
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__FUNCTION__);
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- while (!glamofb_cmdq_empty(gfb))
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+ while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
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yield();
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+ if (timeout < 0) {
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+ printk(KERN_ERR"*************"
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+ "glamofb cmd_queue never got empty"
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+ "*************\n");
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+ return;
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+ }
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dev_dbg(gfb->dev, "empty!\n");
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/* display the entire frame then switch to command */
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@@ -568,8 +576,16 @@ void glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
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/* wait until LCD is idle */
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dev_dbg(gfb->dev, "waiting for LCD idle: ");
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- while (!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12))
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+ timeout = 2000;
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+ while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
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+ (timeout--))
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yield();
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+ if (timeout < 0) {
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+ printk(KERN_ERR"*************"
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+ "glamofb lcd never idle"
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+ "*************\n");
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+ return;
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+ }
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dev_dbg(gfb->dev, "idle!\n");
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msleep(90);
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@@ -589,10 +605,18 @@ EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
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int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
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{
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+ int timeout = 2000;
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+
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dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n",
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__FUNCTION__);
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- while (!glamofb_cmdq_empty(gfb))
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+ while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
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yield();
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+ if (timeout < 0) {
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+ printk(KERN_ERR"*************"
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+ "glamofb cmd_queue never got empty"
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+ "*************\n");
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+ return 1;
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+ }
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dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
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reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
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--
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1.5.6.5
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