imxfb: Add support for multiple displays (343684ff) · Commits · e / devices / android_kernel_fairphone_FP5

arch/arm/mach-mx2/mx27ads.c

+22 −14

Original line number	Diff line number	Diff line
		@@ -183,20 +183,29 @@ void lcd_power(int on)
		__raw_writew(PBC_BCTRL1_LCDON, PBC_BCTRL1_CLEAR_REG);
		}

		static struct imx_fb_platform_data mx27ads_fb_data = {
		.pixclock = 188679,
		static struct imx_fb_videomode mx27ads_modes[] = {
		{
		.mode = {
		.name = "Sharp-LQ035Q7",
		.refresh = 60,
		.xres = 240,
		.yres = 320,

		.bpp = 16,
		.pixclock = 188679, /* in ps (5.3MHz) */
		.hsync_len = 1,
		.left_margin = 9,
		.right_margin = 16,

		.vsync_len = 1,
		.upper_margin = 7,
		.lower_margin = 9,
		.fixed_screen_cpu = 0,
		},
		.bpp = 16,
		.pcr = 0xFB008BC0,
		},
		};

		static struct imx_fb_platform_data mx27ads_fb_data = {
		.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,

arch/arm/mach-mx2/pcm970-baseboard.c

+56 −27

Original line number	Diff line number	Diff line
		@@ -125,25 +125,21 @@ 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_platform_data pcm038_fb_data = {
		.pixclock = 188679, /* in ps (5.3MHz) */
		static struct imx_fb_videomode pcm970_modes[] = {
		{
		.mode = {
		.name = "Sharp-LQ035Q7",
		.refresh = 60,
		.xres = 240,
		.yres = 320,

		.bpp = 16,
		.pixclock = 188679, /* in ps (5.3MHz) */
		.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
		@@ -153,7 +149,40 @@ static struct imx_fb_platform_data pcm038_fb_data = {
		* - data enable low active
		* - enable sharp mode
		*/
		.pcr = 0xFA0080C0,
		.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 = {
		.mode = pcm970_modes,
		.num_modes = ARRAY_SIZE(pcm970_modes),

		.pwmr = 0x00A903FF,
		.lscr1 = 0x00120300,
		.dmacr = 0x00020010,

arch/arm/plat-mxc/include/mach/imxfb.h

+10 −16

Original line number	Diff line number	Diff line
		@@ -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_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;
		struct imx_fb_videomode {
		struct fb_videomode mode;
		u32 pcr;
		unsigned char bpp;
		};

		u_char vsync_len;
		u_char upper_margin;
		u_char lower_margin;
		u_char sync;
		struct imx_fb_platform_data {
		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;

drivers/video/imxfb.c

+120 −71

Original line number	Diff line number	Diff line
		@@ -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;

		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);
		}