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Date: Thu, 26 Aug 2010 11:57:11 +0800
From: Haojian Zhuang <haojian.zhuang@...il.com>
To: "Mark F. Brown" <mark.brown314@...il.com>
Cc: Marek Vasut <marek.vasut@...il.com>,
linux-arm-kernel@...ts.infradead.org, eric.y.miao@...il.com,
linux-kernel@...r.kernel.org, Haojian Zhuang <hzhuang1@...vell.com>
Subject: Re: [PATCH v2 1/1] pxa168: added initial support for TPO TD043MTEA1
LCD display on Aspenite
2010/8/26 Mark F. Brown <mark.brown314@...il.com>:
> On Wed, Aug 25, 2010 at 10:26 PM, Marek Vasut <marek.vasut@...il.com> wrote:
>> Dne Čt 26. srpna 2010 04:04:52 Mark F. Brown napsal(a):
>>> Signed-off-by: Mark F. Brown <mark.brown314@...il.com>
>>> ---
>>> arch/arm/mach-mmp/aspenite.c | 60
>>> +++++++++++++++++++++++++++++++ arch/arm/mach-mmp/include/mach/pxa168.h |
>>> 8 ++++
>>> arch/arm/mach-mmp/pxa168.c | 4 ++
>>> drivers/video/pxa168fb.c | 4 +-
>>> 4 files changed, 74 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/arm/mach-mmp/aspenite.c b/arch/arm/mach-mmp/aspenite.c
>>> index 0629394..9e1bd6b 100644
>>> --- a/arch/arm/mach-mmp/aspenite.c
>>> +++ b/arch/arm/mach-mmp/aspenite.c
>>> @@ -23,6 +23,7 @@
>>> #include <mach/mfp-pxa168.h>
>>> #include <mach/pxa168.h>
>>> #include <mach/gpio.h>
>>> +#include <video/pxa168fb.h>
>>>
>>> #include "common.h"
>>>
>>> @@ -66,6 +67,36 @@ static unsigned long common_pin_config[] __initdata = {
>>> GPIO115_I2S_BCLK,
>>> GPIO116_I2S_RXD,
>>> GPIO117_I2S_TXD,
>>> +
>>> + /* LCD */
>>> + GPIO56_LCD_FCLK_RD,
>>> + GPIO57_LCD_LCLK_A0,
>>> + GPIO58_LCD_PCLK_WR,
>>> + GPIO59_LCD_DENA_BIAS,
>>> + GPIO60_LCD_DD0,
>>> + GPIO61_LCD_DD1,
>>> + GPIO62_LCD_DD2,
>>> + GPIO63_LCD_DD3,
>>> + GPIO64_LCD_DD4,
>>> + GPIO65_LCD_DD5,
>>> + GPIO66_LCD_DD6,
>>> + GPIO67_LCD_DD7,
>>> + GPIO68_LCD_DD8,
>>> + GPIO69_LCD_DD9,
>>> + GPIO70_LCD_DD10,
>>> + GPIO71_LCD_DD11,
>>> + GPIO72_LCD_DD12,
>>> + GPIO73_LCD_DD13,
>>> + GPIO74_LCD_DD14,
>>> + GPIO75_LCD_DD15,
>>> + GPIO76_LCD_DD16,
>>> + GPIO77_LCD_DD17,
>>> + GPIO78_LCD_DD18,
>>> + GPIO79_LCD_DD19,
>>> + GPIO80_LCD_DD20,
>>> + GPIO81_LCD_DD21,
>>> + GPIO82_LCD_DD22,
>>> + GPIO83_LCD_DD23,
>>> };
>>>
>>> static struct smc91x_platdata smc91x_info = {
>>> @@ -134,6 +165,34 @@ static struct i2c_board_info aspenite_i2c_info[]
>>> __initdata = { { I2C_BOARD_INFO("wm8753", 0x1b), },
>>> };
>>>
>>> +static struct fb_videomode video_modes[] = {
>>> + [0] = {
>>> + .pixclock = 30120,
>>> + .refresh = 60,
>>> + .xres = 800,
>>> + .yres = 480,
>>> + .hsync_len = 1,
>>> + .left_margin = 215,
>>> + .right_margin = 40,
>>> + .vsync_len = 1,
>>> + .upper_margin = 34,
>>> + .lower_margin = 10,
>>> + .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
>>> + },
>>> +};
>>> +
>>> +struct pxa168fb_mach_info aspenite_lcd_info = {
>>> + .id = "Graphic Frame",
>>> + .modes = video_modes,
>>> + .num_modes = ARRAY_SIZE(video_modes),
>>> + .pix_fmt = PIX_FMT_RGB565,
>>> + .io_pin_allocation_mode = PIN_MODE_DUMB_24,
>>> + .dumb_mode = DUMB_MODE_RGB888,
>>> + .active = 1,
>>> + .panel_rbswap = 0,
>>> + .invert_pixclock = 0,
>>> +};
>>> +
>>> static void __init common_init(void)
>>> {
>>> mfp_config(ARRAY_AND_SIZE(common_pin_config));
>>> @@ -143,6 +202,7 @@ static void __init common_init(void)
>>> pxa168_add_twsi(1, NULL, ARRAY_AND_SIZE(aspenite_i2c_info));
>>> pxa168_add_ssp(1);
>>> pxa168_add_nand(&aspenite_nand_info);
>>> + pxa168_add_fb(&aspenite_lcd_info);
>>>
>>> /* off-chip devices */
>>> platform_device_register(&smc91x_device);
>>
>>
>>
>> ----------------------------------------------
>> ^--- one patch above
>> SNIP, please split into two patches
>> v--- another patch below
>> ----------------------------------------------
>>
>>
>>
>>
>>> diff --git a/arch/arm/mach-mmp/include/mach/pxa168.h
>>> b/arch/arm/mach-mmp/include/mach/pxa168.h index 27e1bc7..220738f 100644
>>> --- a/arch/arm/mach-mmp/include/mach/pxa168.h
>>> +++ b/arch/arm/mach-mmp/include/mach/pxa168.h
>>> @@ -10,6 +10,7 @@ extern void __init pxa168_init_irq(void);
>>> #include <mach/devices.h>
>>> #include <plat/i2c.h>
>>> #include <plat/pxa3xx_nand.h>
>>> +#include <video/pxa168fb.h>
>>>
>>> extern struct pxa_device_desc pxa168_device_uart1;
>>> extern struct pxa_device_desc pxa168_device_uart2;
>>> @@ -25,6 +26,7 @@ extern struct pxa_device_desc pxa168_device_ssp3;
>>> extern struct pxa_device_desc pxa168_device_ssp4;
>>> extern struct pxa_device_desc pxa168_device_ssp5;
>>> extern struct pxa_device_desc pxa168_device_nand;
>>> +extern struct pxa_device_desc pxa168_device_fb;
>>>
>>> static inline int pxa168_add_uart(int id)
>>> {
>>> @@ -97,4 +99,10 @@ static inline int pxa168_add_nand(struct
>>> pxa3xx_nand_platform_data *info) {
>>> return pxa_register_device(&pxa168_device_nand, info, sizeof(*info));
>>> }
>>> +
>>> +static inline int pxa168_add_fb(struct pxa168fb_mach_info *mi)
>>> +{
>>> + return pxa_register_device(&pxa168_device_fb, mi, sizeof(*mi));
>>> +}
>>> +
>>> #endif /* __ASM_MACH_PXA168_H */
>>> diff --git a/arch/arm/mach-mmp/pxa168.c b/arch/arm/mach-mmp/pxa168.c
>>> index 652ae66..886eadb 100644
>>> --- a/arch/arm/mach-mmp/pxa168.c
>>> +++ b/arch/arm/mach-mmp/pxa168.c
>>> @@ -25,6 +25,7 @@
>>> #include <mach/dma.h>
>>> #include <mach/devices.h>
>>> #include <mach/mfp.h>
>>> +#include <video/pxa168fb.h>
>>>
>>> #include "common.h"
>>> #include "clock.h"
>>> @@ -79,6 +80,7 @@ static APBC_CLK(ssp4, PXA168_SSP4, 4, 0);
>>> static APBC_CLK(ssp5, PXA168_SSP5, 4, 0);
>>>
>>> static APMU_CLK(nand, NAND, 0x01db, 208000000);
>>> +static APMU_CLK(lcd, LCD, 0x7f, 312000000);
>>>
>>> /* device and clock bindings */
>>> static struct clk_lookup pxa168_clkregs[] = {
>>> @@ -96,6 +98,7 @@ static struct clk_lookup pxa168_clkregs[] = {
>>> INIT_CLKREG(&clk_ssp4, "pxa168-ssp.3", NULL),
>>> INIT_CLKREG(&clk_ssp5, "pxa168-ssp.4", NULL),
>>> INIT_CLKREG(&clk_nand, "pxa3xx-nand", NULL),
>>> + INIT_CLKREG(&clk_lcd, "pxa168-fb", NULL),
>>> };
>>>
>>> static int __init pxa168_init(void)
>>> @@ -147,3 +150,4 @@ PXA168_DEVICE(ssp2, "pxa168-ssp", 1, SSP2, 0xd401c000,
>>> 0x40, 54, 55); PXA168_DEVICE(ssp3, "pxa168-ssp", 2, SSP3, 0xd401f000,
>>> 0x40, 56, 57); PXA168_DEVICE(ssp4, "pxa168-ssp", 3, SSP4, 0xd4020000,
>>> 0x40, 58, 59); PXA168_DEVICE(ssp5, "pxa168-ssp", 4, SSP5, 0xd4021000,
>>> 0x40, 60, 61); +PXA168_DEVICE(fb, "pxa168-fb", -1, LCD, 0xd420b000,
>>> 0x1c8);
>>> diff --git a/drivers/video/pxa168fb.c b/drivers/video/pxa168fb.c
>>> index c91a7f7..d3e597e 100644
>>> --- a/drivers/video/pxa168fb.c
>>> +++ b/drivers/video/pxa168fb.c
>>> @@ -559,7 +559,7 @@ static struct fb_ops pxa168fb_ops = {
>>> .fb_imageblit = cfb_imageblit,
>>> };
>>>
>>> -static int __init pxa168fb_init_mode(struct fb_info *info,
>>> +static int pxa168fb_init_mode(struct fb_info *info,
>>> struct pxa168fb_mach_info *mi)
>>
>> Why do you remove __init from it ?
>>> {
>>> struct pxa168fb_info *fbi = info->par;
>>> @@ -599,7 +599,7 @@ static int __init pxa168fb_init_mode(struct fb_info
>>> *info, return ret;
>>> }
>>>
>>> -static int __init pxa168fb_probe(struct platform_device *pdev)
>>> +static int pxa168fb_probe(struct platform_device *pdev)
>>
>> Why do you remove __init from it ? (DTTO)
>>> {
>>> struct pxa168fb_mach_info *mi;
>>> struct fb_info *info = 0;
>>
>> Cheers
>>
>
> Hi Marek,
>
> 1) I removed the __init because it was causing a section mismatch
> warning wth this kernel. Since pxa168fb_probe() is calling
> pxa168fb_init_mode(), I cannot declare pxa168fb_init_mode() as an
> __init function. If pxa168fb_probe gets called after the __init
> section is wiped then it will attempt to run the deleted
> pxa168fb_init_mode() code.
>
> WARNING: vmlinux.o(.data+0x17984): Section mismatch in reference from
> the variable pxa168fb_driver to the function
> .init.text:pxa168fb_probe()
> The variable pxa168fb_driver references
> the function __init pxa168fb_probe()
> If the reference is valid then annotate the
> variable with __init* or __refdata (see linux/init.h) or name the variable:
> *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,
>
>
> 2) What is the logic behind the delineation between patch files? I
> cannot build patch #1 without patch #2 based on how you defined the
> split. I need all of it in order to function.
>
Patch #2 should be the first one since it's related to framebuffer
driver. The next one should be platform file.
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