From 04ab9ef97771ba88789672a1f0d0ddcf8dbc0924 Mon Sep 17 00:00:00 2001
From: Pawel Osciak
Date: Tue, 10 Aug 2010 18:02:43 -0700
Subject: s3c-fb: add support for DMA channel control on S5PV210
S5PV210 SoCs allow enabling/disabling DMA channels per window. For a
window to display data from framebuffer memory, its channel has to be
enabled.
Signed-off-by: Pawel Osciak
Signed-off-by: Marek Szyprowski
Signed-off-by: Kyungmin Park
Cc: InKi Dae
Cc: Ben Dooks
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
---
drivers/video/s3c-fb.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
(limited to 'drivers/video/s3c-fb.c')
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index a95314ddf709..8ea974dd92c5 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -634,6 +634,13 @@ static int s3c_fb_set_par(struct fb_info *info)
writel(data, regs + sfb->variant.wincon + (win_no * 4));
writel(0x0, regs + sfb->variant.winmap + (win_no * 4));
+ /* Enable DMA channel for this window */
+ if (sfb->variant.has_shadowcon) {
+ data = readl(sfb->regs + SHADOWCON);
+ data |= SHADOWCON_CHx_ENABLE(win_no);
+ writel(data, sfb->regs + SHADOWCON);
+ }
+
shadow_protect_win(win, 0);
return 0;
@@ -1091,7 +1098,15 @@ static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win)
*/
static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win)
{
+ u32 data;
+
if (win->fbinfo) {
+ if (sfb->variant.has_shadowcon) {
+ data = readl(sfb->regs + SHADOWCON);
+ data &= ~SHADOWCON_CHx_ENABLE(win->index);
+ data &= ~SHADOWCON_CHx_LOCAL_ENABLE(win->index);
+ writel(data, sfb->regs + SHADOWCON);
+ }
unregister_framebuffer(win->fbinfo);
if (win->fbinfo->cmap.len)
fb_dealloc_cmap(&win->fbinfo->cmap);
--
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