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drm/sun4i: sun8i_csc: Simplify register writes 

It turns out addition of 0x200 to constant parts (+0.5) is not really
necessary. Besides, we can consider that before and fix value in CSC
matrix.

This simplifies register writes quiet a bit.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190713120346.30349-3-jernej.skrabec@siol.net
This commit is contained in:
Jernej Skrabec 2019-07-13 14:03:45 +02:00 committed by Maxime Ripard
parent 5917e0bdbc
commit ab38c3b7c3
No known key found for this signature in database
GPG Key ID: E3EF0D6F671851C5
1 changed files with 3 additions and 8 deletions
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11
drivers/gpu/drm/sun4i/sun8i_csc.c
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@ -69,7 +69,7 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
enum sun8i_csc_mode mode)
{
const u32 *table;
int i, data;
u32 base_reg;
switch (mode) {
case SUN8I_CSC_MODE_YUV2RGB:
@ -83,13 +83,8 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
return;
}
for (i = 0; i < 12; i++) {
data = table[i];
/* For some reason, 0x200 must be added to constant parts */
if (((i + 1) & 3) == 0)
data += 0x200;
regmap_write(map, SUN8I_CSC_COEFF(base, i), data);
}
base_reg = SUN8I_CSC_COEFF(base, 0);
regmap_bulk_write(map, base_reg, table, 12);
}
static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,