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imxfb: Add support for multiple displays

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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2009-03-19 08:25:41 +01:00
parent d6b5150288
commit 343684ffb7
4 changed files with 208 additions and 128 deletions
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36
arch/arm/mach-mx2/mx27ads.c
View File

@ -183,20 +183,29 @@ void lcd_power(int on)
__raw_writew(PBC_BCTRL1_LCDON, PBC_BCTRL1_CLEAR_REG);
}
static struct imx_fb_videomode mx27ads_modes[] = {
{
.mode = {
.name = "Sharp-LQ035Q7",
.refresh = 60,
.xres = 240,
.yres = 320,
.pixclock = 188679, /* in ps (5.3MHz) */
.hsync_len = 1,
.left_margin = 9,
.right_margin = 16,
.vsync_len = 1,
.upper_margin = 7,
.lower_margin = 9,
},
.bpp = 16,
.pcr = 0xFB008BC0,
},
};
static struct imx_fb_platform_data mx27ads_fb_data = {
.pixclock = 188679,
.xres = 240,
.yres = 320,
.bpp = 16,
.hsync_len = 1,
.left_margin = 9,
.right_margin = 16,
.vsync_len = 1,
.upper_margin = 7,
.lower_margin = 9,
.fixed_screen_cpu = 0,
.mode = mx27ads_modes,
.num_modes = ARRAY_SIZE(mx27ads_modes),
/*
* - HSYNC active high
@ -207,7 +216,6 @@ static struct imx_fb_platform_data mx27ads_fb_data = {
* - data enable low active
* - enable sharp mode
*/
.pcr = 0xFB008BC0,
.pwmr = 0x00A903FF,
.lscr1 = 0x00120300,
.dmacr = 0x00020010,

83
arch/arm/mach-mx2/pcm970-baseboard.c
View File

@ -125,35 +125,64 @@ static struct imxmmc_platform_data sdhc_pdata = {
.exit = pcm970_sdhc2_exit,
};
/*
* Connected is a portrait Sharp-QVGA display
* of type: LQ035Q7DH06
*/
static struct imx_fb_videomode pcm970_modes[] = {
{
.mode = {
.name = "Sharp-LQ035Q7",
.refresh = 60,
.xres = 240,
.yres = 320,
.pixclock = 188679, /* in ps (5.3MHz) */
.hsync_len = 7,
.left_margin = 5,
.right_margin = 16,
.vsync_len = 1,
.upper_margin = 7,
.lower_margin = 9,
},
/*
* - HSYNC active high
* - VSYNC active high
* - clk notenabled while idle
* - clock not inverted
* - data not inverted
* - data enable low active
* - enable sharp mode
*/
.pcr = 0xF00080C0,
.bpp = 16,
}, {
.mode = {
.name = "TX090",
.refresh = 60,
.xres = 240,
.yres = 320,
.pixclock = 38255,
.left_margin = 144,
.right_margin = 0,
.upper_margin = 7,
.lower_margin = 40,
.hsync_len = 96,
.vsync_len = 1,
},
/*
* - HSYNC active low (1 << 22)
* - VSYNC active low (1 << 23)
* - clk notenabled while idle
* - clock not inverted
* - data not inverted
* - data enable low active
* - enable sharp mode
*/
.pcr = 0xF0008080 | (1<<22) | (1<<23) | (1<<19),
.bpp = 32,
},
};
static struct imx_fb_platform_data pcm038_fb_data = {
.pixclock = 188679, /* in ps (5.3MHz) */
.xres = 240,
.yres = 320,
.mode = pcm970_modes,
.num_modes = ARRAY_SIZE(pcm970_modes),
.bpp = 16,
.hsync_len = 7,
.left_margin = 5,
.right_margin = 16,
.vsync_len = 1,
.upper_margin = 7,
.lower_margin = 9,
.fixed_screen_cpu = 0,
/*
* - HSYNC active high
* - VSYNC active high
* - clk notenabled while idle
* - clock not inverted
* - data not inverted
* - data enable low active
* - enable sharp mode
*/
.pcr = 0xFA0080C0,
.pwmr = 0x00A903FF,
.lscr1 = 0x00120300,
.dmacr = 0x00020010,

26
arch/arm/plat-mxc/include/mach/imxfb.h
View File

@ -2,6 +2,8 @@
* This structure describes the machine which we are running on.
*/
#include <linux/fb.h>
#define PCR_TFT (1 << 31)
#define PCR_COLOR (1 << 30)
#define PCR_PBSIZ_1 (0 << 28)
@ -47,29 +49,21 @@
#define DMACR_HM(x) (((x) & 0xf) << 16)
#define DMACR_TM(x) ((x) & 0xf)
struct imx_fb_videomode {
struct fb_videomode mode;
u32 pcr;
unsigned char bpp;
};
struct imx_fb_platform_data {
u_long pixclock;
u_short xres;
u_short yres;
u_int nonstd;
u_char bpp;
u_char hsync_len;
u_char left_margin;
u_char right_margin;
u_char vsync_len;
u_char upper_margin;
u_char lower_margin;
u_char sync;
struct imx_fb_videomode *mode;
int num_modes;
u_int cmap_greyscale:1,
cmap_inverse:1,
cmap_static:1,
unused:29;
u_int pcr;
u_int pwmr;
u_int lscr1;
u_int dmacr;

191
drivers/video/imxfb.c
View File

@ -130,6 +130,10 @@
#define LCDISR_EOF (1<<1)
#define LCDISR_BOF (1<<0)
/* Used fb-mode. Can be set on kernel command line, therefore file-static. */
static const char *fb_mode;
/*
* These are the bitfields for each
* display depth that we support.
@ -146,10 +150,6 @@ struct imxfb_info {
void __iomem *regs;
struct clk *clk;
u_int max_bpp;
u_int max_xres;
u_int max_yres;
/*
* These are the addresses we mapped
* the framebuffer memory region to.
@ -173,6 +173,9 @@ struct imxfb_info {
cmap_static:1,
unused:30;
struct imx_fb_videomode *mode;
int num_modes;
void (*lcd_power)(int);
void (*backlight_power)(int);
};
@ -299,6 +302,18 @@ static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
return ret;
}
static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi)
{
struct imx_fb_videomode *m;
int i;
for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) {
if (!strcmp(m->mode.name, fb_mode))
return m;
}
return NULL;
}
/*
* imxfb_check_var():
* Round up in the following order: bits_per_pixel, xres,
@ -309,35 +324,81 @@ static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
struct imxfb_rgb *rgb;
const struct imx_fb_videomode *imxfb_mode;
unsigned long lcd_clk;
unsigned long long tmp;
u32 pcr = 0;
if (var->xres < MIN_XRES)
var->xres = MIN_XRES;
if (var->yres < MIN_YRES)
var->yres = MIN_YRES;
if (var->xres > fbi->max_xres)
var->xres = fbi->max_xres;
if (var->yres > fbi->max_yres)
var->yres = fbi->max_yres;
var->xres_virtual = max(var->xres_virtual, var->xres);
var->yres_virtual = max(var->yres_virtual, var->yres);
imxfb_mode = imxfb_find_mode(fbi);
if (!imxfb_mode)
return -EINVAL;
var->xres = imxfb_mode->mode.xres;
var->yres = imxfb_mode->mode.yres;
var->bits_per_pixel = imxfb_mode->bpp;
var->pixclock = imxfb_mode->mode.pixclock;
var->hsync_len = imxfb_mode->mode.hsync_len;
var->left_margin = imxfb_mode->mode.left_margin;
var->right_margin = imxfb_mode->mode.right_margin;
var->vsync_len = imxfb_mode->mode.vsync_len;
var->upper_margin = imxfb_mode->mode.upper_margin;
var->lower_margin = imxfb_mode->mode.lower_margin;
var->sync = imxfb_mode->mode.sync;
var->xres_virtual = max(var->xres_virtual, var->xres);
var->yres_virtual = max(var->yres_virtual, var->yres);
pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
lcd_clk = clk_get_rate(fbi->clk);
tmp = var->pixclock * (unsigned long long)lcd_clk;
do_div(tmp, 1000000);
if (do_div(tmp, 1000000) > 500000)
tmp++;
pcr = (unsigned int)tmp;
if (--pcr > 0x3F) {
pcr = 0x3F;
printk(KERN_WARNING "Must limit pixel clock to %luHz\n",
lcd_clk / pcr);
}
switch (var->bits_per_pixel) {
case 32:
pcr |= PCR_BPIX_18;
rgb = &def_rgb_18;
break;
case 16:
default:
if (fbi->pcr & PCR_TFT)
if (cpu_is_mx1())
pcr |= PCR_BPIX_12;
else
pcr |= PCR_BPIX_16;
if (imxfb_mode->pcr & PCR_TFT)
rgb = &def_rgb_16_tft;
else
rgb = &def_rgb_16_stn;
break;
case 8:
pcr |= PCR_BPIX_8;
rgb = &def_rgb_8;
break;
}
/* add sync polarities */
pcr |= imxfb_mode->pcr & ~(0x3f | (7 << 25));
fbi->pcr = pcr;
/*
* Copy the RGB parameters for this display
* from the machine specific parameters.
@ -394,10 +455,6 @@ static void imxfb_enable_controller(struct imxfb_info *fbi)
writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
/* physical screen start address */
writel(VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4),
fbi->regs + LCDC_VPW);
/* panning offset 0 (0 pixel offset) */
writel(0x00000000, fbi->regs + LCDC_POS);
@ -469,8 +526,6 @@ static struct fb_ops imxfb_ops = {
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
unsigned int pcr, lcd_clk;
unsigned long long tmp;
pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
var->xres, var->hsync_len,
@ -506,6 +561,10 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf
info->fix.id, var->lower_margin);
#endif
/* physical screen start address */
writel(VPW_VPW(var->xres * var->bits_per_pixel / 8 / 4),
fbi->regs + LCDC_VPW);
writel(HCR_H_WIDTH(var->hsync_len - 1) |
HCR_H_WAIT_1(var->right_margin - 1) |
HCR_H_WAIT_2(var->left_margin - 3),
@ -519,38 +578,7 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf
writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
fbi->regs + LCDC_SIZE);
lcd_clk = clk_get_rate(fbi->clk);
tmp = var->pixclock * (unsigned long long)lcd_clk;
do_div(tmp, 1000000);
if (do_div(tmp, 1000000) > 500000)
tmp++;
pcr = (unsigned int)tmp;
if (--pcr > 0x3F) {
pcr = 0x3F;
printk(KERN_WARNING "Must limit pixel clock to %uHz\n",
lcd_clk / pcr);
}
switch (var->bits_per_pixel) {
case 32:
pcr |= PCR_BPIX_18;
break;
case 16:
default:
if (cpu_is_mx1())
pcr |= PCR_BPIX_12;
else
pcr |= PCR_BPIX_16;
break;
case 8:
pcr |= PCR_BPIX_8;
break;
}
/* add sync polarities */
pcr |= fbi->pcr & ~(0x3f | (7 << 25));
writel(pcr, fbi->regs + LCDC_PCR);
writel(fbi->pcr, fbi->regs + LCDC_PCR);
writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
@ -592,6 +620,8 @@ static int __init imxfb_init_fbinfo(struct platform_device *pdev)
struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
struct fb_info *info = dev_get_drvdata(&pdev->dev);
struct imxfb_info *fbi = info->par;
struct imx_fb_videomode *m;
int i;
pr_debug("%s\n",__func__);
@ -620,35 +650,18 @@ static int __init imxfb_init_fbinfo(struct platform_device *pdev)
info->fbops = &imxfb_ops;
info->flags = FBINFO_FLAG_DEFAULT |
FBINFO_READS_FAST;
fbi->max_xres = pdata->xres;
info->var.xres = pdata->xres;
info->var.xres_virtual = pdata->xres;
fbi->max_yres = pdata->yres;
info->var.yres = pdata->yres;
info->var.yres_virtual = pdata->yres;
fbi->max_bpp = pdata->bpp;
info->var.bits_per_pixel = pdata->bpp;
info->var.nonstd = pdata->nonstd;
info->var.pixclock = pdata->pixclock;
info->var.hsync_len = pdata->hsync_len;
info->var.left_margin = pdata->left_margin;
info->var.right_margin = pdata->right_margin;
info->var.vsync_len = pdata->vsync_len;
info->var.upper_margin = pdata->upper_margin;
info->var.lower_margin = pdata->lower_margin;
info->var.sync = pdata->sync;
info->var.grayscale = pdata->cmap_greyscale;
fbi->cmap_inverse = pdata->cmap_inverse;
fbi->cmap_static = pdata->cmap_static;
fbi->pcr = pdata->pcr;
fbi->lscr1 = pdata->lscr1;
fbi->dmacr = pdata->dmacr;
fbi->pwmr = pdata->pwmr;
fbi->lcd_power = pdata->lcd_power;
fbi->backlight_power = pdata->backlight_power;
info->fix.smem_len = fbi->max_xres * fbi->max_yres *
fbi->max_bpp / 8;
for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++)
info->fix.smem_len = max_t(size_t, info->fix.smem_len,
m->mode.xres * m->mode.yres * m->bpp / 8);
return 0;
}
@ -659,7 +672,7 @@ static int __init imxfb_probe(struct platform_device *pdev)
struct fb_info *info;
struct imx_fb_platform_data *pdata;
struct resource *res;
int ret;
int ret, i;
dev_info(&pdev->dev, "i.MX Framebuffer driver\n");
@ -679,6 +692,9 @@ static int __init imxfb_probe(struct platform_device *pdev)
fbi = info->par;
if (!fb_mode)
fb_mode = pdata->mode[0].mode.name;
platform_set_drvdata(pdev, info);
ret = imxfb_init_fbinfo(pdev);
@ -736,6 +752,13 @@ static int __init imxfb_probe(struct platform_device *pdev)
goto failed_platform_init;
}
fbi->mode = pdata->mode;
fbi->num_modes = pdata->num_modes;
INIT_LIST_HEAD(&info->modelist);
for (i = 0; i < pdata->num_modes; i++)
fb_add_videomode(&pdata->mode[i].mode, &info->modelist);
/*
* This makes sure that our colour bitfield
* descriptors are correctly initialised.
@ -828,8 +851,34 @@ static struct platform_driver imxfb_driver = {
},
};
static int imxfb_setup(void)
{
#ifndef MODULE
char *opt, *options = NULL;
if (fb_get_options("imxfb", &options))
return -ENODEV;
if (!options || !*options)
return 0;
while ((opt = strsep(&options, ",")) != NULL) {
if (!*opt)
continue;
else
fb_mode = opt;
}
#endif
return 0;
}
int __init imxfb_init(void)
{
int ret = imxfb_setup();
if (ret < 0)
return ret;
return platform_driver_probe(&imxfb_driver, imxfb_probe);
}