openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

video: fb: vt8500: Convert framebuffer drivers to standardized binding 

Now that a display timing binding is available, convert our almost identical
binding to use the standard binding.

This patch converts the vt8500 and wm8505 framebuffer drivers and
associated dts/dtsi files to use the standard binding as defined in
bindings/video/display-timing.txt.

There are two side-effects of making this conversion:

1) The fb node should now be in the board file, rather than the soc file as
the display-timing node is a child of the fb node.

2) We still require a bits per pixel property to initialize the framebuffer
for the different lcd panels. Rather than including this as part of the
display timing, it is moved into the framebuffer node.

I have also taken the opportunity to alphabetise the includes of each
driver to avoid double-ups.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tony Prisk 2013-04-03 07:20:38 +13:00 committed by Tomi Valkeinen
parent de68efced1
commit 7ab0a48420
13 changed files with 154 additions and 212 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
Documentation/devicetree/bindings/video/via,vt8500-fb.txt
View File

@ -5,58 +5,32 @@ Required properties:
- compatible : "via,vt8500-fb"
- reg : Should contain 1 register ranges(address and length)
- interrupts : framebuffer controller interrupt
- display: a phandle pointing to the display node
- bits-per-pixel : bit depth of framebuffer (16 or 32)
Required nodes:
- display: a display node is required to initialize the lcd panel
This should be in the board dts.
- default-mode: a videomode within the display with timing parameters
as specified below.
Required subnodes:
- display-timings: see display-timing.txt for information
Example:
fb@d800e400 {
fb@d8050800 {
compatible = "via,vt8500-fb";
reg = <0xd800e400 0x400>;
interrupts = <12>;
display = <&display>;
default-mode = <&mode0>;
};
bits-per-pixel = <16>;
VIA VT8500 Display
-----------------------------------------------------
Required properties (as per of_videomode_helper):
- hactive, vactive: Display resolution
- hfront-porch, hback-porch, hsync-len: Horizontal Display timing parameters
in pixels
vfront-porch, vback-porch, vsync-len: Vertical display timing parameters in
lines
- clock: displayclock in Hz
- bpp: lcd panel bit-depth.
<16> for RGB565, <32> for RGB888
Optional properties (as per of_videomode_helper):
- width-mm, height-mm: Display dimensions in mm
- hsync-active-high (bool): Hsync pulse is active high
- vsync-active-high (bool): Vsync pulse is active high
- interlaced (bool): This is an interlaced mode
- doublescan (bool): This is a doublescan mode
Example:
display: display@0 {
modes {
mode0: mode@0 {
display-timings {
native-mode = <&timing0>;
timing0: 800x480 {
clock-frequency = <0>; /* unused but required */
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
hback-porch = <88>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
clock = <0>; /* unused but required */
bpp = <16>; /* non-standard but required */
};
};
};

32
Documentation/devicetree/bindings/video/wm,wm8505-fb.txt
View File

@ -4,20 +4,30 @@ Wondermedia WM8505 Framebuffer
Required properties:
- compatible : "wm,wm8505-fb"
- reg : Should contain 1 register ranges(address and length)
- via,display: a phandle pointing to the display node
- bits-per-pixel : bit depth of framebuffer (16 or 32)
Required nodes:
- display: a display node is required to initialize the lcd panel
This should be in the board dts. See definition in
Documentation/devicetree/bindings/video/via,vt8500-fb.txt
- default-mode: a videomode node as specified in
Documentation/devicetree/bindings/video/via,vt8500-fb.txt
Required subnodes:
- display-timings: see display-timing.txt for information
Example:
fb@d8050800 {
fb@d8051700 {
compatible = "wm,wm8505-fb";
reg = <0xd8050800 0x200>;
display = <&display>;
default-mode = <&mode0>;
reg = <0xd8051700 0x200>;
bits-per-pixel = <16>;
display-timings {
native-mode = <&timing0>;
timing0: 800x480 {
clock-frequency = <0>; /* unused but required */
hactive = <800>;
vactive = <480>;
hfront-porch = <40>;
hback-porch = <88>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
};
};
};

34
arch/arm/boot/dts/vt8500-bv07.dts
View File

@ -11,26 +11,22 @@
/ {
model = "Benign BV07 Netbook";
};
/*
* Display node is based on Sascha Hauer's patch on dri-devel.
* Added a bpp property to calculate the size of the framebuffer
* until the binding is formalized.
*/
display: display@0 {
modes {
mode0: mode@0 {
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
clock = <0>; /* unused but required */
bpp = <16>; /* non-standard but required */
};
&fb {
bits-per-pixel = <16>;
display-timings {
native-mode = <&timing0>;
timing0: 800x480 {
clock-frequency = <0>; /* unused but required */
hactive = <800>;
vactive = <480>;
hfront-porch = <40>;
hback-porch = <88>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
};
};
};

4
arch/arm/boot/dts/vt8500.dtsi
View File

@ -98,12 +98,10 @@ uhci@d8007b00 {
interrupts = <43>;
};
fb@d800e400 {
fb: fb@d8050800 {
compatible = "via,vt8500-fb";
reg = <0xd800e400 0x400>;
interrupts = <12>;
display = <&display>;
default-mode = <&mode0>;
};
ge_rops@d8050400 {

34
arch/arm/boot/dts/wm8505-ref.dts
View File

@ -11,26 +11,22 @@
/ {
model = "Wondermedia WM8505 Netbook";
};
/*
* Display node is based on Sascha Hauer's patch on dri-devel.
* Added a bpp property to calculate the size of the framebuffer
* until the binding is formalized.
*/
display: display@0 {
modes {
mode0: mode@0 {
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
clock = <0>; /* unused but required */
bpp = <32>; /* non-standard but required */
};
&fb {
bits-per-pixel = <32>;
display-timings {
native-mode = <&timing0>;
timing0: 800x480 {
clock-frequency = <0>; /* unused but required */
hactive = <800>;
vactive = <480>;
hfront-porch = <40>;
hback-porch = <88>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
};
};
};

4
arch/arm/boot/dts/wm8505.dtsi
View File

@ -128,11 +128,9 @@ uhci@d8007300 {
interrupts = <0>;
};
fb@d8050800 {
fb: fb@d8050800 {
compatible = "wm,wm8505-fb";
reg = <0xd8050800 0x200>;
display = <&display>;
default-mode = <&mode0>;
};
ge_rops@d8050400 {

36
arch/arm/boot/dts/wm8650-mid.dts
View File

@ -11,26 +11,24 @@
/ {
model = "Wondermedia WM8650-MID Tablet";
};
/*
* Display node is based on Sascha Hauer's patch on dri-devel.
* Added a bpp property to calculate the size of the framebuffer
* until the binding is formalized.
*/
display: display@0 {
modes {
mode0: mode@0 {
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
clock = <0>; /* unused but required */
bpp = <16>; /* non-standard but required */
};
&fb {
bits-per-pixel = <16>;
display-timings {
native-mode = <&timing0>;
timing0: 800x480 {
clock-frequency = <0>; /* unused but required */
hactive = <800>;
vactive = <480>;
hfront-porch = <40>;
hback-porch = <88>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
};
};
};

4
arch/arm/boot/dts/wm8650.dtsi
View File

@ -128,11 +128,9 @@ uhci@d8007b00 {
interrupts = <43>;
};
fb@d8050800 {
fb: fb@d8050800 {
compatible = "wm,wm8505-fb";
reg = <0xd8050800 0x200>;
display = <&display>;
default-mode = <&mode0>;
};
ge_rops@d8050400 {

40
arch/arm/boot/dts/wm8850-w70v2.dts
View File

@ -15,28 +15,6 @@
/ {
model = "Wondermedia WM8850-W70v2 Tablet";
/*
* Display node is based on Sascha Hauer's patch on dri-devel.
* Added a bpp property to calculate the size of the framebuffer
* until the binding is formalized.
*/
display: display@0 {
modes {
mode0: mode@0 {
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
clock = <0>; /* unused but required */
bpp = <16>; /* non-standard but required */
};
};
};
backlight {
compatible = "pwm-backlight";
pwms = <&pwm 0 50000 1>; /* duty inverted */
@ -45,3 +23,21 @@ backlight {
default-brightness-level = <5>;
};
};
&fb {
bits-per-pixel = <16>;
display-timings {
native-mode = <&timing0>;
timing0: 800x480 {
clock-frequency = <0>; /* unused but required */
hactive = <800>;
vactive = <480>;
hfront-porch = <40>;
hback-porch = <88>;
hsync-len = <0>;
vback-porch = <32>;
vfront-porch = <11>;
vsync-len = <1>;
};
};
};

4
arch/arm/boot/dts/wm8850.dtsi
View File

@ -135,11 +135,9 @@ clksdhc: sdhc {
};
};
fb@d8051700 {
fb: fb@d8051700 {
compatible = "wm,wm8505-fb";
reg = <0xd8051700 0x200>;
display = <&display>;
default-mode = <&mode0>;
};
ge_rops@d8050400 {

6
drivers/video/Kconfig
View File

@ -1794,6 +1794,9 @@ config FB_VT8500
select FB_SYS_FILLRECT if (!FB_WMT_GE_ROPS)
select FB_SYS_COPYAREA if (!FB_WMT_GE_ROPS)
select FB_SYS_IMAGEBLIT
select FB_MODE_HELPERS
select OF_DISPLAY_TIMING
select OF_VIDEOMODE
help
This is the framebuffer driver for VIA VT8500 integrated LCD
controller.
@ -1804,6 +1807,9 @@ config FB_WM8505
select FB_SYS_FILLRECT if (!FB_WMT_GE_ROPS)
select FB_SYS_COPYAREA if (!FB_WMT_GE_ROPS)
select FB_SYS_IMAGEBLIT
select FB_MODE_HELPERS
select OF_DISPLAY_TIMING
select OF_VIDEOMODE
help
This is the framebuffer driver for WonderMedia WM8xxx-series
integrated LCD controller. This driver covers the WM8505, WM8650

53
drivers/video/vt8500lcdfb.c
View File

@ -15,20 +15,21 @@
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <video/of_display_timing.h>
#include "vt8500lcdfb.h"
#include "wmt_ge_rops.h"
@ -275,11 +276,11 @@ static int vt8500lcd_probe(struct platform_device *pdev)
{
struct vt8500lcd_info *fbi;
struct resource *res;
struct display_timings *disp_timing;
void *addr;
int irq, ret;
struct fb_videomode of_mode;
struct device_node *np;
u32 bpp;
dma_addr_t fb_mem_phys;
unsigned long fb_mem_len;
@ -344,32 +345,18 @@ static int vt8500lcd_probe(struct platform_device *pdev)
goto failed_free_res;
}
np = of_parse_phandle(pdev->dev.of_node, "default-mode", 0);
if (!np) {
pr_err("%s: No display description in Device Tree\n", __func__);
ret = -EINVAL;
goto failed_free_res;
}
disp_timing = of_get_display_timings(pdev->dev.of_node);
if (!disp_timing)
return -EINVAL;
/*
* This code is copied from Sascha Hauer's of_videomode helper
* and can be replaced with a call to the helper once mainlined
*/
ret = 0;
ret |= of_property_read_u32(np, "hactive", &of_mode.xres);
ret |= of_property_read_u32(np, "vactive", &of_mode.yres);
ret |= of_property_read_u32(np, "hback-porch", &of_mode.left_margin);
ret |= of_property_read_u32(np, "hfront-porch", &of_mode.right_margin);
ret |= of_property_read_u32(np, "hsync-len", &of_mode.hsync_len);
ret |= of_property_read_u32(np, "vback-porch", &of_mode.upper_margin);
ret |= of_property_read_u32(np, "vfront-porch", &of_mode.lower_margin);
ret |= of_property_read_u32(np, "vsync-len", &of_mode.vsync_len);
ret |= of_property_read_u32(np, "bpp", &bpp);
if (ret) {
pr_err("%s: Unable to read display properties\n", __func__);
goto failed_free_res;
}
of_mode.vmode = FB_VMODE_NONINTERLACED;
ret = of_get_fb_videomode(pdev->dev.of_node, &of_mode,
OF_USE_NATIVE_MODE);
if (ret)
return ret;
ret = of_property_read_u32(pdev->dev.of_node, "bits-per-pixel", &bpp);
if (ret)
return ret;
/* try allocating the framebuffer */
fb_mem_len = of_mode.xres * of_mode.yres * 2 * (bpp / 8);

67
drivers/video/wm8505fb.c
View File

@ -14,23 +14,24 @@
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/fb.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/wait.h>
#include <linux/kernel.h>
#include <linux/memblock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/memblock.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <video/of_display_timing.h>
#include "wm8505fb_regs.h"
#include "wmt_ge_rops.h"
@ -261,12 +262,12 @@ static struct fb_ops wm8505fb_ops = {
static int wm8505fb_probe(struct platform_device *pdev)
{
struct wm8505fb_info *fbi;
struct resource *res;
struct resource *res;
struct display_timings *disp_timing;
void *addr;
int ret;
struct fb_videomode of_mode;
struct device_node *np;
struct fb_videomode mode;
u32 bpp;
dma_addr_t fb_mem_phys;
unsigned long fb_mem_len;
@ -306,33 +307,19 @@ static int wm8505fb_probe(struct platform_device *pdev)
if (fbi->regbase == NULL)
return -EBUSY;
np = of_parse_phandle(pdev->dev.of_node, "default-mode", 0);
if (!np) {
pr_err("%s: No display description in Device Tree\n", __func__);
disp_timing = of_get_display_timings(pdev->dev.of_node);
if (!disp_timing)
return -EINVAL;
}
/*
* This code is copied from Sascha Hauer's of_videomode helper
* and can be replaced with a call to the helper once mainlined
*/
ret = 0;
ret |= of_property_read_u32(np, "hactive", &of_mode.xres);
ret |= of_property_read_u32(np, "vactive", &of_mode.yres);
ret |= of_property_read_u32(np, "hback-porch", &of_mode.left_margin);
ret |= of_property_read_u32(np, "hfront-porch", &of_mode.right_margin);
ret |= of_property_read_u32(np, "hsync-len", &of_mode.hsync_len);
ret |= of_property_read_u32(np, "vback-porch", &of_mode.upper_margin);
ret |= of_property_read_u32(np, "vfront-porch", &of_mode.lower_margin);
ret |= of_property_read_u32(np, "vsync-len", &of_mode.vsync_len);
ret |= of_property_read_u32(np, "bpp", &bpp);
if (ret) {
pr_err("%s: Unable to read display properties\n", __func__);
return -EINVAL;
}
ret = of_get_fb_videomode(pdev->dev.of_node, &mode, OF_USE_NATIVE_MODE);
if (ret)
return ret;
of_mode.vmode = FB_VMODE_NONINTERLACED;
fb_videomode_to_var(&fbi->fb.var, &of_mode);
ret = of_property_read_u32(pdev->dev.of_node, "bits-per-pixel", &bpp);
if (ret)
return ret;
fb_videomode_to_var(&fbi->fb.var, &mode);
fbi->fb.var.nonstd = 0;
fbi->fb.var.activate = FB_ACTIVATE_NOW;
@ -341,7 +328,7 @@ static int wm8505fb_probe(struct platform_device *pdev)
fbi->fb.var.width = -1;
/* try allocating the framebuffer */
fb_mem_len = of_mode.xres * of_mode.yres * 2 * (bpp / 8);
fb_mem_len = mode.xres * mode.yres * 2 * (bpp / 8);
fb_mem_virt = dmam_alloc_coherent(&pdev->dev, fb_mem_len, &fb_mem_phys,
GFP_KERNEL);
if (!fb_mem_virt) {
@ -349,8 +336,8 @@ static int wm8505fb_probe(struct platform_device *pdev)
return -ENOMEM;
}
fbi->fb.var.xres_virtual = of_mode.xres;
fbi->fb.var.yres_virtual = of_mode.yres * 2;
fbi->fb.var.xres_virtual = mode.xres;
fbi->fb.var.yres_virtual = mode.yres * 2;
fbi->fb.var.bits_per_pixel = bpp;
fbi->fb.fix.smem_start = fb_mem_phys;