video: s3c-fb: add alpha value width setting
This patch adds alpha value width setting according to
transparency value of each window format, using BLENDCON
register. When alpha value is 8 bits, BLENDCON will set
alpha value width as 8 bits.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index 389189a9..9af6c18 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -82,6 +82,7 @@
* @palette: Address of palette memory, or 0 if none.
* @has_prtcon: Set if has PRTCON register.
* @has_shadowcon: Set if has SHADOWCON register.
+ * @has_blendcon: Set if has BLENDCON register.
* @has_clksel: Set if VIDCON0 register has CLKSEL bit.
*/
struct s3c_fb_variant {
@@ -100,6 +101,7 @@
unsigned int has_prtcon:1;
unsigned int has_shadowcon:1;
+ unsigned int has_blendcon:1;
unsigned int has_clksel:1;
};
@@ -691,6 +693,17 @@
writel(data, regs + sfb->variant.wincon + (win_no * 4));
writel(0x0, regs + sfb->variant.winmap + (win_no * 4));
+ /* Set alpha value width */
+ if (sfb->variant.has_blendcon) {
+ data = readl(sfb->regs + BLENDCON);
+ data &= ~BLENDCON_NEW_MASK;
+ if (var->transp.length > 4)
+ data |= BLENDCON_NEW_8BIT_ALPHA_VALUE;
+ else
+ data |= BLENDCON_NEW_4BIT_ALPHA_VALUE;
+ writel(data, sfb->regs + BLENDCON);
+ }
+
shadow_protect_win(win, 0);
pm_runtime_put_sync(sfb->dev);
@@ -1798,6 +1811,7 @@
},
.has_prtcon = 1,
+ .has_blendcon = 1,
.has_clksel = 1,
},
.win[0] = &s3c_fb_data_s5p_wins[0],
@@ -1829,6 +1843,7 @@
},
.has_shadowcon = 1,
+ .has_blendcon = 1,
.has_clksel = 1,
},
.win[0] = &s3c_fb_data_s5p_wins[0],
@@ -1860,6 +1875,7 @@
},
.has_shadowcon = 1,
+ .has_blendcon = 1,
},
.win[0] = &s3c_fb_data_s5p_wins[0],
.win[1] = &s3c_fb_data_s5p_wins[1],
@@ -1923,6 +1939,8 @@
[1] = 0x2800,
[2] = 0x2c00,
},
+
+ .has_blendcon = 1,
},
.win[0] = &s3c_fb_data_s5p_wins[0],
.win[1] = &s3c_fb_data_s5p_wins[1],