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pm2fb: Permedia 2V memory clock setting

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Permedia 2V uses its own registers to set a memory clock. The
patch adds these registers and uses them in the set_memclock()
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 2007-05-08 00:39:32 -07:00 committed by Linus Torvalds
parent f1c15f938d
commit e5d809d774
2 changed files with 41 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/video/pm2fb.c
View File

@ -462,21 +462,43 @@ static void set_memclock(struct pm2fb_par* par, u32 clk)
int i; int i;
unsigned char m, n, p; unsigned char m, n, p;
pm2_mnp(clk, &m, &n, &p); switch (par->type) {
WAIT_FIFO(par, 10); case PM2_TYPE_PERMEDIA2V:
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 6); pm2v_mnp(clk/2, &m, &n, &p);
wmb(); WAIT_FIFO(par, 8);
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_1, m); pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_MCLK_CONTROL >> 8);
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_2, n); pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 0);
wmb(); wmb();
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 8|p); pm2v_RDAC_WR(par, PM2VI_RD_MCLK_PRESCALE, m);
wmb(); pm2v_RDAC_WR(par, PM2VI_RD_MCLK_FEEDBACK, n);
pm2_RDAC_RD(par, PM2I_RD_MEMORY_CLOCK_STATUS); pm2v_RDAC_WR(par, PM2VI_RD_MCLK_POSTSCALE, p);
rmb(); wmb();
for (i = 256; pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 1);
i && !(pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED); rmb();
i--) for (i = 256;
; i && !(pm2_RDAC_RD(par, PM2VI_RD_MCLK_CONTROL) & 2);
i--)
;
pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
break;
case PM2_TYPE_PERMEDIA2:
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;
i && !(pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED);
i--)
;
break;
}
} }
static void set_pixclock(struct pm2fb_par* par, u32 clk) static void set_pixclock(struct pm2fb_par* par, u32 clk)

4
include/video/permedia2.h
View File

@ -154,6 +154,10 @@
#define PM2VI_RD_CLK1_PRESCALE 0x204 #define PM2VI_RD_CLK1_PRESCALE 0x204
#define PM2VI_RD_CLK1_FEEDBACK 0x205 #define PM2VI_RD_CLK1_FEEDBACK 0x205
#define PM2VI_RD_CLK1_POSTSCALE 0x206 #define PM2VI_RD_CLK1_POSTSCALE 0x206
#define PM2VI_RD_MCLK_CONTROL 0x20D
#define PM2VI_RD_MCLK_PRESCALE 0x20E
#define PM2VI_RD_MCLK_FEEDBACK 0x20F
#define PM2VI_RD_MCLK_POSTSCALE 0x210
#define PM2VI_RD_CURSOR_PALETTE 0x303 #define PM2VI_RD_CURSOR_PALETTE 0x303
#define PM2VI_RD_CURSOR_PATTERN 0x400 #define PM2VI_RD_CURSOR_PATTERN 0x400