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From 86fd2e3e74a191ae43122ac18f62f5163c577d4b Mon Sep 17 00:00:00 2001
From: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Date: Wed, 26 Nov 2008 14:11:59 +0100
Subject: [PATCH 3/3] atmel_mpopfb: add signal to disable line caching and set correct output
This patch adds a signal to disable line caching, due to an errata in
silicon revision A. It also sets the output from MPOP to BGR to match
big endian framebuffer memory.
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
diff --git a/drivers/video/atmel_mpopfb.c b/drivers/video/atmel_mpopfb.c
index 3b4b668..350303b 100644
--- a/drivers/video/atmel_mpopfb.c
+++ b/drivers/video/atmel_mpopfb.c
@@ -313,6 +313,10 @@ static int atmel_mpopfb_check_var(struct fb_var_screeninfo *var,
static void atmel_mpopfb_start(struct atmel_mpopfb_info *sinfo)
{
if (!sinfo->running) {
+ unsigned int line_cache_disable =
+ sinfo->baseimg_info.line_cache_disable ?
+ ATMEL_MPOP_CR_CACHEDIS_MASK : 0;
+
dev_dbg(sinfo->info->device, " * Starting MPOP.\n");
/* Enable all error interrupts. */
@@ -323,9 +327,9 @@ static void atmel_mpopfb_start(struct atmel_mpopfb_info *sinfo)
* reading from the slave interface it will start
* generating a frame.
*/
- mpop_writel(sinfo, ATMEL_MPOP_CR,
- ATMEL_MPOP_CR_EN_MASK
- /*| ATMEL_MPOP_CR_OUT_BGR_MASK */ );
+ mpop_writel(sinfo, ATMEL_MPOP_CR, ATMEL_MPOP_CR_EN_MASK
+ | line_cache_disable
+ | ATMEL_MPOP_CR_OUT_BGR_MASK);
sinfo->running = 1;
}
diff --git a/include/linux/atmel_mpopfb.h b/include/linux/atmel_mpopfb.h
index cd12e16..d0f2505 100644
--- a/include/linux/atmel_mpopfb.h
+++ b/include/linux/atmel_mpopfb.h
@@ -42,9 +42,11 @@ struct atmel_mpopfb_baseimg_info {
unsigned xsize;
unsigned ysize;
- /* Signal that we should flip the video. */
+ /* Signal for flipping the video. */
int flip;
+ /* Signal for disabling the line cache. */
+ int line_cache_disable;
};
enum atmel_mpopfb_overlay_type {
--
1.5.6.3
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