[PATCH 3/9] video: stm: code buswidth in platform data as decimal
Sascha Hauer
s.hauer at pengutronix.de
Mon Jul 6 03:36:08 PDT 2015
Instead of putting hardware specific bit masks in platform_data just
use the decimal interface width and encode this in the driver. This
makes it easier to create the platform_data and helps device tree
based implementations.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/boards/chumby_falconwing/falconwing.c | 2 +-
arch/arm/boards/freescale-mx28-evk/mx28-evk.c | 2 +-
arch/arm/boards/karo-tx28/tx28-stk5.c | 2 +-
arch/arm/mach-mxs/include/mach/fb.h | 7 +-----
drivers/video/stm.c | 32 +++++++++++++++++++++-----
5 files changed, 30 insertions(+), 15 deletions(-)
diff --git a/arch/arm/boards/chumby_falconwing/falconwing.c b/arch/arm/boards/chumby_falconwing/falconwing.c
index 5e569bc..c866043 100644
--- a/arch/arm/boards/chumby_falconwing/falconwing.c
+++ b/arch/arm/boards/chumby_falconwing/falconwing.c
@@ -83,7 +83,7 @@ static struct imx_fb_platformdata fb_mode = {
.mode_list = &falconwing_vmode,
.mode_cnt = 1,
/* the NMA35 is a 24 bit display, but only 18 bits are connected */
- .ld_intf_width = STMLCDIF_18BIT,
+ .ld_intf_width = 18,
.enable = chumby_fb_enable,
.fixed_screen = (void *)(0x40000000 + SZ_64M - MAX_FB_SIZE),
.fixed_screen_size = MAX_FB_SIZE,
diff --git a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
index d77a6c7..fc12375 100644
--- a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
+++ b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
@@ -226,7 +226,7 @@ static struct imx_fb_platformdata mx28_evk_fb_pdata = {
.mode_list = mx28_evk_vmodes,
.mode_cnt = ARRAY_SIZE(mx28_evk_vmodes),
.dotclk_delay = 0, /* no adaption required */
- .ld_intf_width = STMLCDIF_24BIT, /* full 24 bit */
+ .ld_intf_width = 24,
.bits_per_pixel = 32,
.fixed_screen = NULL,
.enable = mx28_evk_fb_enable,
diff --git a/arch/arm/boards/karo-tx28/tx28-stk5.c b/arch/arm/boards/karo-tx28/tx28-stk5.c
index 9b86d1c..d67607b 100644
--- a/arch/arm/boards/karo-tx28/tx28-stk5.c
+++ b/arch/arm/boards/karo-tx28/tx28-stk5.c
@@ -195,7 +195,7 @@ static struct imx_fb_platformdata tx28_fb_pdata = {
.mode_list = tx28evk_vmodes,
.mode_cnt = ARRAY_SIZE(tx28evk_vmodes),
.dotclk_delay = 0, /* no adaption required */
- .ld_intf_width = STMLCDIF_24BIT, /* full 24 bit */
+ .ld_intf_width = 24,
.fixed_screen = (void *)(0x40000000 + SZ_128M - MAX_FB_SIZE),
.fixed_screen_size = MAX_FB_SIZE,
.enable = tx28_fb_enable,
diff --git a/arch/arm/mach-mxs/include/mach/fb.h b/arch/arm/mach-mxs/include/mach/fb.h
index 2b6825f..ad28f79 100644
--- a/arch/arm/mach-mxs/include/mach/fb.h
+++ b/arch/arm/mach-mxs/include/mach/fb.h
@@ -15,11 +15,6 @@
#include <fb.h>
-#define STMLCDIF_8BIT 1 /** pixel data bus to the display is of 8 bit width */
-#define STMLCDIF_16BIT 0 /** pixel data bus to the display is of 16 bit width */
-#define STMLCDIF_18BIT 2 /** pixel data bus to the display is of 18 bit width */
-#define STMLCDIF_24BIT 3 /** pixel data bus to the display is of 24 bit width */
-
/** LC display uses active high data enable signal */
#define FB_SYNC_DE_HIGH_ACT (1 << 27)
/** LC display will latch its data at clock's rising edge */
@@ -38,7 +33,7 @@ struct imx_fb_platformdata {
unsigned mode_cnt;
unsigned dotclk_delay; /**< refer manual HW_LCDIF_VDCTRL4 register */
- unsigned ld_intf_width; /**< refer STMLCDIF_* macros */
+ unsigned ld_intf_width; /* interface width in bits */
unsigned bits_per_pixel;
void *fixed_screen; /**< if != NULL use this as framebuffer memory */
diff --git a/drivers/video/stm.c b/drivers/video/stm.c
index c58b62c..92bff9c 100644
--- a/drivers/video/stm.c
+++ b/drivers/video/stm.c
@@ -36,7 +36,10 @@
# define CTRL_VSYNC_MODE (1 << 18)
# define CTRL_DOTCLK_MODE (1 << 17)
# define CTRL_DATA_SELECT (1 << 16)
-# define SET_BUS_WIDTH(x) (((x) & 0x3) << 10)
+# define CTRL_BUS_WIDTH_8 (1 << 10)
+# define CTRL_BUS_WIDTH_16 (0 << 10)
+# define CTRL_BUS_WIDTH_18 (2 << 10)
+# define CTRL_BUS_WIDTH_24 (3 << 10)
# define SET_WORD_LENGTH(x) (((x) & 0x3) << 8)
# define GET_WORD_LENGTH(x) (((x) >> 8) & 0x3)
# define CTRL_MASTER (1 << 5)
@@ -353,7 +356,24 @@ static int stmfb_activate_var(struct fb_info *fb_info)
/*
* Configure videomode and interface mode
*/
- reg |= SET_BUS_WIDTH(fbi->ld_intf_width);
+ switch (fbi->ld_intf_width) {
+ case 8:
+ reg |= CTRL_BUS_WIDTH_8;
+ break;
+ case 16:
+ reg |= CTRL_BUS_WIDTH_16;
+ break;
+ case 18:
+ reg |= CTRL_BUS_WIDTH_18;
+ break;
+ case 24:
+ reg |= CTRL_BUS_WIDTH_24;
+ break;
+ default:
+ dev_err(fbi->hw_dev, "Unsupported interface width %d\n",
+ fbi->ld_intf_width);
+ return -EINVAL;
+ }
switch (fb_info->bits_per_pixel) {
case 8:
@@ -377,12 +397,12 @@ static int stmfb_activate_var(struct fb_info *fb_info)
reg |= SET_WORD_LENGTH(3);
switch (fbi->ld_intf_width) {
- case STMLCDIF_8BIT:
+ case 8:
dev_dbg(fbi->hw_dev,
"Unsupported LCD bus width mapping\n");
break;
- case STMLCDIF_16BIT:
- case STMLCDIF_18BIT:
+ case 16:
+ case 18:
/* 24 bit to 18 bit mapping
* which means: ignore the upper 2 bits in
* each colour component
@@ -393,7 +413,7 @@ static int stmfb_activate_var(struct fb_info *fb_info)
fb_info->blue = def_rgb666[BLUE];
fb_info->transp = def_rgb666[TRANSP];
break;
- case STMLCDIF_24BIT:
+ case 24:
/* real 24 bit */
fb_info->red = def_rgb888[RED];
fb_info->green = def_rgb888[GREEN];
--
2.1.4
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