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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2016-02-22 01:55:27 +0000 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-02-26 13:06:11 +0200 |
| commit | 5832706e8b50bab3fce1b4bad62b356554b851e4 (patch) | |
| tree | 95bd825327984824f38adc9828225e0e4d1031cd /drivers/video | |
| parent | 01ac59c34420d5807724a5bb21c1464e6dfb7a92 (diff) | |
| download | linux-5832706e8b50bab3fce1b4bad62b356554b851e4.tar.bz2 | |
video: fbdev: pmag-ba-fb: Optimize Bt455 colormap addressing
Use the address autoincrement feature when accessing successive palette
entries and also skip loading a palette address in overlay register
assesses which do not use that address. Provide a red/green/blue
register sequencer reset helper for use in overlay register assesses
where the state of the sequencer is not known.
References:
[1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC",
Brooktree Corporation, Document Number: L454001, Rev. I
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/bt455.h | 38 | ||||
| -rw-r--r-- | drivers/video/fbdev/pmag-aa-fb.c | 6 |
2 files changed, 32 insertions, 12 deletions
diff --git a/drivers/video/fbdev/bt455.h b/drivers/video/fbdev/bt455.h index a4bba5a49d77..dd1404b40611 100644 --- a/drivers/video/fbdev/bt455.h +++ b/drivers/video/fbdev/bt455.h @@ -30,13 +30,17 @@ static inline void bt455_select_reg(struct bt455_regs *regs, int ir) regs->addr_cmap = ir & 0x0f; } +static inline void bt455_reset_reg(struct bt455_regs *regs) +{ + mb(); + regs->addr_clr = 0; +} + /* * Read/write to a Bt455 color map register. */ -static inline void bt455_read_cmap_entry(struct bt455_regs *regs, - int cr, u8 *grey) +static inline void bt455_read_cmap_next(struct bt455_regs *regs, u8 *grey) { - bt455_select_reg(regs, cr); mb(); regs->addr_cmap_data; rmb(); @@ -45,10 +49,8 @@ static inline void bt455_read_cmap_entry(struct bt455_regs *regs, regs->addr_cmap_data; } -static inline void bt455_write_cmap_entry(struct bt455_regs *regs, - int cr, u8 grey) +static inline void bt455_write_cmap_next(struct bt455_regs *regs, u8 grey) { - bt455_select_reg(regs, cr); wmb(); regs->addr_cmap_data = 0x0; wmb(); @@ -57,10 +59,8 @@ static inline void bt455_write_cmap_entry(struct bt455_regs *regs, regs->addr_cmap_data = 0x0; } -static inline void bt455_write_ovly_entry(struct bt455_regs *regs, - int cr, u8 grey) +static inline void bt455_write_ovly_next(struct bt455_regs *regs, u8 grey) { - bt455_select_reg(regs, cr); wmb(); regs->addr_ovly = 0x0; wmb(); @@ -68,3 +68,23 @@ static inline void bt455_write_ovly_entry(struct bt455_regs *regs, wmb(); regs->addr_ovly = 0x0; } + +static inline void bt455_read_cmap_entry(struct bt455_regs *regs, + int cr, u8 *grey) +{ + bt455_select_reg(regs, cr); + bt455_read_cmap_next(regs, grey); +} + +static inline void bt455_write_cmap_entry(struct bt455_regs *regs, + int cr, u8 grey) +{ + bt455_select_reg(regs, cr); + bt455_write_cmap_next(regs, grey); +} + +static inline void bt455_write_ovly_entry(struct bt455_regs *regs, u8 grey) +{ + bt455_reset_reg(regs); + bt455_write_ovly_next(regs, grey); +} diff --git a/drivers/video/fbdev/pmag-aa-fb.c b/drivers/video/fbdev/pmag-aa-fb.c index 6f4466c39529..ffe2dd482f84 100644 --- a/drivers/video/fbdev/pmag-aa-fb.c +++ b/drivers/video/fbdev/pmag-aa-fb.c @@ -122,8 +122,8 @@ static int aafb_cursor(struct fb_info *info, struct fb_cursor *cursor) u8 bg = cursor->image.bg_color ? 0xf : 0x0; bt455_write_cmap_entry(par->bt455, 8, bg); - bt455_write_cmap_entry(par->bt455, 9, bg); - bt455_write_ovly_entry(par->bt455, 0, fg); + bt455_write_cmap_next(par->bt455, bg); + bt455_write_ovly_next(par->bt455, fg); } if (cursor->set & (FB_CUR_SETSIZE | FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) bt431_set_cursor(par->bt431, @@ -212,7 +212,7 @@ static int pmagaafb_probe(struct device *dev) /* Init colormap. */ bt455_write_cmap_entry(par->bt455, 0, 0x0); - bt455_write_cmap_entry(par->bt455, 1, 0xf); + bt455_write_cmap_next(par->bt455, 0xf); /* Init hardware cursor. */ bt431_erase_cursor(par->bt431); |