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pm2fb: RDAC_WR barriers clean up

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This patch fixes a possible barriers problem in RDAC_WR functions, then
remove redudant ones.

It also removes one unneeded register load from blitter function().

Signed-off-by: Krzysztof.Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Helt 2007-05-23 13:57:47 -07:00 committed by Linus Torvalds
parent 8d74c1fdaa
commit 11d1a62c59
1 changed files with 5 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
drivers/video/pm2fb.c
View file

@ -183,15 +183,17 @@ static inline void pm2_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v)
index = PM2VR_RD_INDEXED_DATA;
break;
}
mb();
wmb();
pm2_WR(p, index, v);
wmb();
}
static inline void pm2v_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v)
{
pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
mb();
wmb();
pm2_WR(p, PM2VR_RD_INDEXED_DATA, v);
wmb();
}
#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
@ -466,11 +468,9 @@ static void set_memclock(struct pm2fb_par* par, u32 clk)
WAIT_FIFO(par, 8);
pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_MCLK_CONTROL >> 8);
pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 0);
wmb();
pm2v_RDAC_WR(par, PM2VI_RD_MCLK_PRESCALE, m);
pm2v_RDAC_WR(par, PM2VI_RD_MCLK_FEEDBACK, n);
pm2v_RDAC_WR(par, PM2VI_RD_MCLK_POSTSCALE, p);
wmb();
pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 1);
rmb();
for (i = 256;
@ -483,12 +483,9 @@ static void set_memclock(struct pm2fb_par* par, u32 clk)
pm2_mnp(clk, &m, &n, &p);
WAIT_FIFO(par, 10);
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 6);
wmb();
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_1, m);
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_2, n);
wmb();
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 8|p);
wmb();
pm2_RDAC_RD(par, PM2I_RD_MEMORY_CLOCK_STATUS);
rmb();
for (i = 256;
@ -509,12 +506,9 @@ static void set_pixclock(struct pm2fb_par* par, u32 clk)
pm2_mnp(clk, &m, &n, &p);
WAIT_FIFO(par, 8);
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 0);
wmb();
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A1, m);
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A2, n);
wmb();
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 8|p);
wmb();
pm2_RDAC_RD(par, PM2I_RD_PIXEL_CLOCK_STATUS);
rmb();
for (i = 256;
@ -1066,10 +1060,9 @@ static void pm2fb_block_op(struct fb_info* info, int copy,
if (!w || !h)
return;
WAIT_FIFO(par, 6);
WAIT_FIFO(par, 5);
pm2_WR(par, PM2R_CONFIG, PM2F_CONFIG_FB_WRITE_ENABLE |
PM2F_CONFIG_FB_READ_SOURCE_ENABLE);
pm2_WR(par, PM2R_FB_PIXEL_OFFSET, 0);
if (copy)
pm2_WR(par, PM2R_FB_SOURCE_DELTA,
((ysrc-y) & 0xfff) << 16 | ((xsrc-x) & 0xfff));