On Wednesday, August 08, 2012 9:15 PM Phil Edworthy wrote
Hi Phil Edworthy,
I reviewed your patch.
Please refer to my comments.
Good luck.
Best regards,
Jingoo Han
>
> The vdc4 display hardware is found on the sh7269 device.
> Signed-off-by: Phil Edworthy <phil.edworthy@xxxxxxxxxxx>
Please insert one line between the commit message and Signed-off-by.
> ---
> drivers/video/Kconfig | 10 +
> drivers/video/Makefile | 1 +
> drivers/video/ren_vdc4fb.c | 653 ++++++++++++++++++++++++++++++++++++++++++++
> include/video/ren_vdc4fb.h | 19 ++
> 4 files changed, 683 insertions(+), 0 deletions(-)
> create mode 100644 drivers/video/ren_vdc4fb.c
> create mode 100644 include/video/ren_vdc4fb.h
>
> diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
> index 0217f74..89c9250 100644
> --- a/drivers/video/Kconfig
> +++ b/drivers/video/Kconfig
> @@ -1990,6 +1990,16 @@ config FB_W100
>
> If unsure, say N.
>
> +config FB_REN_VDC4FB
> + tristate "Renesas VDC4 framebuffer support"
> + depends on FB && CPU_SUBTYPE_SH7269
> + select FB_SYS_FILLRECT
> + select FB_SYS_COPYAREA
> + select FB_SYS_IMAGEBLIT
> + select FB_SYS_FOPS
> + ---help---
> + Frame buffer driver for the Renesas VDC4.
> +
> config FB_SH_MOBILE_LCDC
> tristate "SuperH Mobile LCDC framebuffer support"
> depends on FB && (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
> diff --git a/drivers/video/Makefile b/drivers/video/Makefile
> index ee8dafb..ba69fcb 100644
> --- a/drivers/video/Makefile
> +++ b/drivers/video/Makefile
> @@ -140,6 +140,7 @@ obj-$(CONFIG_SH_MIPI_DSI) += sh_mipi_dsi.o
> obj-$(CONFIG_FB_SH_MOBILE_HDMI) += sh_mobile_hdmi.o
> obj-$(CONFIG_FB_SH_MOBILE_MERAM) += sh_mobile_meram.o
> obj-$(CONFIG_FB_SH_MOBILE_LCDC) += sh_mobile_lcdcfb.o
> +obj-$(CONFIG_FB_REN_VDC4FB) += ren_vdc4fb.o
> obj-$(CONFIG_FB_OMAP) += omap/
> obj-y += omap2/
> obj-$(CONFIG_XEN_FBDEV_FRONTEND) += xen-fbfront.o
> diff --git a/drivers/video/ren_vdc4fb.c b/drivers/video/ren_vdc4fb.c
> new file mode 100644
> index 0000000..1a31e85
> --- /dev/null
> +++ b/drivers/video/ren_vdc4fb.c
> @@ -0,0 +1,653 @@
> +/*
> + * Renesas VDC4 Framebuffer
> + *
> + * Based on sh_mobile_lcdcfb.c
> + * Copyright (c) 2012 Renesas Electronics Europe Ltd
> + *
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License. See the file "COPYING" in the main directory of this archive
> + * for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/mm.h>
> +#include <linux/clk.h>
> +#include <linux/sh_clk.h>
> +#include <linux/platform_device.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/interrupt.h>
> +#include <linux/vmalloc.h>
> +#include <linux/module.h>
> +#include <video/ren_vdc4fb.h>
> +
> +#define PALETTE_NR 16
> +
> +struct ren_vdc4_priv {
> + void __iomem *base;
> + int irq;
> + struct clk *dot_clk;
> + struct clk *clk;
> + struct fb_info *info;
> + dma_addr_t dma_handle;
> + struct ren_vdc4_info *cfg;
> + u32 pseudo_palette[PALETTE_NR];
> +};
> +
> +/* Register offsets/reading and writing functions */
> +enum {
> + SCL0_UPDATE, SCL0_FRC1, SCL0_FRC2, SCL0_FRC3,
> + SCL0_FRC4, SCL0_FRC5, SCL0_FRC6, SCL0_FRC7,
> + SCL0_DS1, SCL0_US1,
> +
> + GR1_UPDATE, GR1_AB1,
> +
> + GR2_UPDATE, GR2_AB1,
> +
> + GR3_UPDATE, GR3_FLM_RD, GR3_FLM1, GR3_FLM2,
> + GR3_FLM3, GR3_FLM4, GR3_FLM5, GR3_FLM6, GR3_AB1,
> + GR3_AB2, GR3_AB3, GR3_AB4, GR3_AB5, GR3_AB6,
> + GR3_AB7, GR3_AB8, GR3_AB9, GR3_AB10, GR3_AB11,
> + GR3_BASE, GR3_CLUT_INT, GR3_MON,
> +
> + TCON_UPDATE, TCON_TIM, TCON_TIM_STVA1, TCON_TIM_STVA2,
> + TCON_TIM_STVB1, TCON_TIM_STVB2, TCON_TIM_STH1,
> + TCON_TIM_STH2, TCON_TIM_STB1, TCON_TIM_STB2,
> + TCON_TIM_CPV1, TCON_TIM_CPV2, TCON_TIM_POLA1,
> + TCON_TIM_POLA2, TCON_TIM_POLB1, TCON_TIM_POLB2,
> + TCON_TIM_DE,
> +
> + OUT_UPDATE, OUT_SET, OUT_BRIGHT1,
> + OUT_BRIGHT2, OUT_CONTRAST, OUT_PDTHA, OUT_CLK_PHASE,
> +
> + SYSCNT_INT1, SYSCNT_INT2, SYSCNT_INT3, SYSCNT_INT4,
> + SYSCNT_PANEL_CLK, SYSCNT_CLUT
> +};
> +
> +static unsigned long vdc4_offsets[] = {
> + [SCL0_UPDATE] = 0x0100,
> + [SCL0_FRC1] = 0x0104,
> + [SCL0_FRC2] = 0x0108,
> + [SCL0_FRC3] = 0x010C,
> + [SCL0_FRC4] = 0x0110,
> + [SCL0_FRC5] = 0x0114,
> + [SCL0_FRC6] = 0x0118,
> + [SCL0_FRC7] = 0x011C,
> + [SCL0_DS1] = 0x012C,
> + [SCL0_US1] = 0x0148,
> + [GR1_UPDATE] = 0x0200,
> + [GR1_AB1] = 0x0220,
> + [GR2_UPDATE] = 0x0300,
> + [GR2_AB1] = 0x0320,
> + [GR3_UPDATE] = 0x0380,
> + [GR3_FLM_RD] = 0x0384,
> + [GR3_FLM1] = 0x0388,
> + [GR3_FLM2] = 0x038C,
> + [GR3_FLM3] = 0x0390,
> + [GR3_FLM4] = 0x0394,
> + [GR3_FLM5] = 0x0398,
> + [GR3_FLM6] = 0x039C,
> + [GR3_AB1] = 0x03A0,
> + [GR3_AB2] = 0x03A4,
> + [GR3_AB3] = 0x03A8,
> + [GR3_AB4] = 0x03AC,
> + [GR3_AB5] = 0x03B0,
> + [GR3_AB6] = 0x03B4,
> + [GR3_AB7] = 0x03B8,
> + [GR3_AB8] = 0x03BC,
> + [GR3_AB9] = 0x03C0,
> + [GR3_AB10] = 0x03C4,
> + [GR3_AB11] = 0x03C8,
> + [GR3_BASE] = 0x03CC,
> + [GR3_CLUT_INT] = 0x03D0,
> + [GR3_MON] = 0x03D4,
> + [TCON_UPDATE] = 0x0580,
> + [TCON_TIM] = 0x0584,
> + [TCON_TIM_STVA1] = 0x0588,
> + [TCON_TIM_STVA2] = 0x058C,
> + [TCON_TIM_STVB1] = 0x0590,
> + [TCON_TIM_STVB2] = 0x0594,
> + [TCON_TIM_STH1] = 0x0598,
> + [TCON_TIM_STH2] = 0x059C,
> + [TCON_TIM_STB1] = 0x05A0,
> + [TCON_TIM_STB2] = 0x05A4,
> + [TCON_TIM_CPV1] = 0x05A8,
> + [TCON_TIM_CPV2] = 0x05AC,
> + [TCON_TIM_POLA1] = 0x05B0,
> + [TCON_TIM_POLA2] = 0x05B4,
> + [TCON_TIM_POLB1] = 0x05B8,
> + [TCON_TIM_POLB2] = 0x05BC,
> + [TCON_TIM_DE] = 0x05C0,
> + [OUT_UPDATE] = 0x0600,
> + [OUT_SET] = 0x0604,
> + [OUT_BRIGHT1] = 0x0608,
> + [OUT_BRIGHT2] = 0x060C,
> + [OUT_CONTRAST] = 0x0610,
> + [OUT_PDTHA] = 0x0614,
> + [OUT_CLK_PHASE] = 0x0624,
> + [SYSCNT_INT1] = 0x0680,
> + [SYSCNT_INT2] = 0x0684,
> + [SYSCNT_INT3] = 0x0688,
> + [SYSCNT_INT4] = 0x068C,
> + [SYSCNT_PANEL_CLK] = 0x0690, /* 16-bit */
> + [SYSCNT_CLUT] = 0x0692, /* 16-bit */
> +};
> +
> +/* SYSCNT */
> +#define ICKEN (1 << 8)
> +
> +/* SCL Syncs */
> +#define FREE_RUN_VSYNC 0x0001
> +
> +/* OUTPUT */
> +#define OUT_FMT_RGB666 (1 << 12)
> +
> +/* TCON Timings */
> +#define STVB_SEL_BITS 0x0007
> +#define STVB_HS_SEL 2
> +
> +#define STH2_SEL_BITS 0x0007
> +#define STH2_DE_SEL 7
> +
> +/* OUTCLK */
> +#define LCD_DATA_EDGE 0x0100
> +#define STVB_EDGE 0x0020
> +#define STH_EDGE 0x0010
> +
> +/* SCL_UPDATE */
> +#define SCL0_UPDATE_BIT 0x0100
> +#define SCL0_VEN_BIT 0x0010
> +
> +/* TCON_UPDATE */
> +#define TCON_VEN_BIT 0x0001
> +
> +/* OUT_UPDATE */
> +#define OUTCNT_VEN_BIT 0x0001
> +
> +/* GR_UPDATE */
> +#define P_VEN_UPDATE 0x0010
> +#define IBUS_VEN_UPDATE 0x0001
> +
> +/* GR_AB1 */
> +#define DISPSEL_BCKGND 0x0000
> +#define DISPSEL_LOWER 0x0001
> +#define DISPSEL_CUR 0x0002
> +
> +/* GR_FLM_RD */
> +#define FB_R_ENB 0x01
> +
> +
Please remove unnecessary line.
> +static void vdc4_write(struct ren_vdc4_priv *priv,
> + unsigned long reg_offs, unsigned long data)
> +{
> + if ((SYSCNT_PANEL_CLK == reg_offs) || (SYSCNT_CLUT == reg_offs))
> + iowrite16(data, priv->base + vdc4_offsets[reg_offs]);
> + else
> + iowrite32(data, priv->base + vdc4_offsets[reg_offs]);
> +}
> +
> +static unsigned long vdc4_read(struct ren_vdc4_priv *priv,
> + unsigned long reg_offs)
> +{
> + if ((SYSCNT_PANEL_CLK == reg_offs) || (SYSCNT_CLUT == reg_offs))
> + return ioread16(priv->base + vdc4_offsets[reg_offs]);
> + else
> + return ioread32(priv->base + vdc4_offsets[reg_offs]);
> +}
> +
> +static irqreturn_t ren_vdc4_irq(int irq, void *data)
> +{
> + /* Not currently implemented/used */
> + return IRQ_HANDLED;
> +}
> +
> +static void lcd_clear_display(struct ren_vdc4_priv *priv)
> +{
> + unsigned char *pdest;
> + unsigned long size;
> +
> + pdest = (unsigned char *)priv->dma_handle;
> + size = priv->cfg->lcd_cfg.xres * priv->cfg->lcd_cfg.yres * 2;
> +
> + memset(pdest, 0, size);
> +}
> +
> +static void restart_tft_display(struct ren_vdc4_priv *priv,
> + int clock_source)
> +{
> + struct fb_videomode *lcd;
> + unsigned long h;
> + unsigned long v;
> + unsigned long tmp;
> +
> + /* FB setup */
> + lcd = &priv->cfg->lcd_cfg;
> + lcd_clear_display(priv);
> +
> + /* VDC clock Setup */
> + tmp = priv->cfg->clock_divider;
> + tmp |= clock_source << 12;
> + tmp |= ICKEN;
> + vdc4_write(priv, SYSCNT_PANEL_CLK, tmp);
> +
> + /* Clear and Disable all interrupts */
> + vdc4_write(priv, SYSCNT_INT1, 0);
> + vdc4_write(priv, SYSCNT_INT2, 0);
> + vdc4_write(priv, SYSCNT_INT3, 0);
> + vdc4_write(priv, SYSCNT_INT4, 0);
> +
> + /* Setup free-running syncs */
> + vdc4_write(priv, SCL0_FRC3, FREE_RUN_VSYNC);
> +
> + /* Disable scale up/down */
> + vdc4_write(priv, SCL0_DS1, 0);
> + vdc4_write(priv, SCL0_US1, 0);
> +
> + /* Timing registers */
> + h = lcd->hsync_len + lcd->left_margin + lcd->xres + lcd->right_margin;
> + v = lcd->vsync_len + lcd->upper_margin + lcd->yres + lcd->lower_margin;
> + tmp = (v - 1) << 16;
> + tmp |= h - 1;
> + vdc4_write(priv, SCL0_FRC4, tmp);
> +
> + vdc4_write(priv, TCON_TIM, (((h - 1) / 2) << 16));
> +
> + tmp = (lcd->vsync_len + lcd->upper_margin) << 16;
> + tmp |= lcd->yres;
> + vdc4_write(priv, SCL0_FRC6, tmp);
> + vdc4_write(priv, TCON_TIM_STVB1, tmp);
> + vdc4_write(priv, GR3_AB2, tmp);
> +
> + tmp = lcd->left_margin << 16;
> + tmp |= lcd->xres;
> + vdc4_write(priv, SCL0_FRC7, tmp);
> + vdc4_write(priv, TCON_TIM_STB1, tmp);
> + vdc4_write(priv, GR3_AB3, tmp);
> +
> + vdc4_write(priv, SCL0_FRC1, 0);
> + vdc4_write(priv, SCL0_FRC2, 0);
> + vdc4_write(priv, SCL0_FRC5, 0);
> +
> + /* Set output format */
> + vdc4_write(priv, OUT_SET, OUT_FMT_RGB666);
> +
> + /* STH TCON Timing */
> + tmp = priv->cfg->hs_pulse_width;
> + tmp |= priv->cfg->hs_start_pos << 16;
> + vdc4_write(priv, TCON_TIM_STH1, tmp);
> +
> + /* Setup STVB as HSYNC */
> + tmp = vdc4_read(priv, TCON_TIM_STVB2);
> + tmp &= ~STVB_SEL_BITS;
> + tmp |= STVB_HS_SEL;
> + vdc4_write(priv, TCON_TIM_STVB2, tmp);
> +
> + tmp = vdc4_read(priv, OUT_CLK_PHASE);
> + tmp &= ~STVB_EDGE;
> + vdc4_write(priv, OUT_CLK_PHASE, tmp);
> +
> + /* Setup STH as DE */
> + tmp = vdc4_read(priv, TCON_TIM_STH2);
> + tmp &= ~STH2_SEL_BITS;
> + tmp |= STH2_DE_SEL;
> + vdc4_write(priv, TCON_TIM_STH2, tmp);
> +
> + tmp = vdc4_read(priv, OUT_CLK_PHASE);
> + tmp &= ~STH_EDGE;
> + vdc4_write(priv, OUT_CLK_PHASE, tmp);
> +
> + /* Output clock rising edge */
> + tmp = vdc4_read(priv, OUT_CLK_PHASE);
> + tmp &= ~LCD_DATA_EDGE;
> + vdc4_write(priv, OUT_CLK_PHASE, tmp);
> +
> + /* Setup graphics buffers and update all registers */
> + vdc4_write(priv, GR1_AB1, DISPSEL_BCKGND);
> + vdc4_write(priv, GR2_AB1, DISPSEL_LOWER);
> + vdc4_write(priv, GR3_AB1, DISPSEL_CUR);
> +
> + /* Setup framebuffer base/output */
> + vdc4_write(priv, GR3_FLM_RD, FB_R_ENB);
> +
> + vdc4_write(priv, GR3_FLM2, (unsigned long)priv->info->screen_base);
> +
> + vdc4_write(priv, GR3_FLM3, (lcd->xres * 2) << 16);
> +
> + tmp = vdc4_read(priv, GR3_FLM5);
> + tmp |= lcd->yres << 16;
> + vdc4_write(priv, GR3_FLM5, tmp);
> +
> + tmp = lcd->xres << 16;
> + vdc4_write(priv, GR3_FLM6, tmp);
> +
> + /* Apply all register settings */
> + vdc4_write(priv, SCL0_UPDATE, SCL0_VEN_BIT | SCL0_UPDATE_BIT);
> + vdc4_write(priv, GR1_UPDATE, P_VEN_UPDATE);
> + vdc4_write(priv, GR2_UPDATE, P_VEN_UPDATE);
> + vdc4_write(priv, GR3_UPDATE, P_VEN_UPDATE | IBUS_VEN_UPDATE);
> + vdc4_write(priv, OUT_UPDATE, OUTCNT_VEN_BIT);
> + vdc4_write(priv, TCON_UPDATE, TCON_VEN_BIT);
> +}
> +
> +static int ren_vdc4_setup_clocks(struct platform_device *pdev,
> + int clock_source,
> + struct ren_vdc4_priv *priv)
> +{
> + priv->clk = clk_get(&pdev->dev, "vdc4");
How about using devm_clk_get() instead of kzalloc()?
It makes the code simpler.
> + if (IS_ERR(priv->clk)) {
> + dev_err(&pdev->dev, "cannot get clock \"vdc4\"\n");
> + return PTR_ERR(priv->clk);
> + }
> +
> + if (clock_source == VDC4_PERI_CLK) {
> + priv->dot_clk = clk_get(&pdev->dev, "peripheral_clk");
How about using devm_clk_get() instead of kzalloc()?
It makes the code simpler.
> + if (IS_ERR(priv->dot_clk)) {
> + dev_err(&pdev->dev, "cannot get peripheral clock\n");
> + clk_put(priv->clk);
> + return PTR_ERR(priv->dot_clk);
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int ren_vdc4_setcolreg(u_int regno,
> + u_int red, u_int green, u_int blue,
> + u_int transp, struct fb_info *info)
> +{
> + u32 *palette = info->pseudo_palette;
> +
> + if (regno >= PALETTE_NR)
> + return -EINVAL;
> +
> + /* only FB_VISUAL_TRUECOLOR supported */
> +
> + red >>= 16 - info->var.red.length;
> + green >>= 16 - info->var.green.length;
> + blue >>= 16 - info->var.blue.length;
> + transp >>= 16 - info->var.transp.length;
> +
> + palette[regno] = (red << info->var.red.offset) |
> + (green << info->var.green.offset) |
> + (blue << info->var.blue.offset) |
> + (transp << info->var.transp.offset);
> +
> + return 0;
> +}
> +
> +static struct fb_fix_screeninfo ren_vdc4_fix = {
> + .id = "Renesas VDC4FB",
> + .type = FB_TYPE_PACKED_PIXELS,
> + .visual = FB_VISUAL_TRUECOLOR,
> + .accel = FB_ACCEL_NONE,
> +};
> +
> +static struct fb_ops ren_vdc4_ops = {
> + .owner = THIS_MODULE,
^^^^^^^^
Please use tab instead of spaces.
> + .fb_setcolreg = ren_vdc4_setcolreg,
> + .fb_read = fb_sys_read,
> + .fb_write = fb_sys_write,
Same as above.
> + .fb_fillrect = sys_fillrect,
> + .fb_copyarea = sys_copyarea,
> + .fb_imageblit = sys_imageblit,
> +};
> +
> +static int ren_vdc4_set_bpp(struct fb_var_screeninfo *var, int bpp)
> +{
> + switch (bpp) {
> + case 16: /* RGB 565 */
> + var->red.offset = 11;
> + var->red.length = 5;
> + var->green.offset = 5;
> + var->green.length = 6;
> + var->blue.offset = 0;
> + var->blue.length = 5;
> + var->transp.offset = 0;
> + var->transp.length = 0;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + var->bits_per_pixel = bpp;
> + var->red.msb_right = 0;
> + var->green.msb_right = 0;
> + var->blue.msb_right = 0;
> + var->transp.msb_right = 0;
> + return 0;
> +}
> +
> +/* PM Functions */
> +static int ren_vdc4_start(struct ren_vdc4_priv *priv,
> + int clock_source)
> +{
> + int ret;
> +
> + ret = clk_enable(priv->clk);
> + if (ret < 0)
> + return ret;
> +
> + if (priv->dot_clk) {
> + ret = clk_enable(priv->dot_clk);
> + if (ret < 0)
> + return ret;
> + }
> +
> + restart_tft_display(priv, clock_source);
> +
> + return ret;
> +}
> +
> +static void ren_vdc4_stop(struct ren_vdc4_priv *priv)
> +{
> + if (priv->dot_clk)
> + clk_disable(priv->dot_clk);
> + clk_disable(priv->clk);
> +}
> +
> +static int ren_vdc4_suspend(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> +
> + ren_vdc4_stop(platform_get_drvdata(pdev));
> + return 0;
> +}
> +
> +static int ren_vdc4_resume(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct ren_vdc4_info *pdata = pdev->dev.platform_data;
> +
> + return ren_vdc4_start(platform_get_drvdata(pdev), pdata->clock_source);
> +}
> +
> +static const struct dev_pm_ops ren_vdc4_dev_pm_ops = {
> + .suspend = ren_vdc4_suspend,
> + .resume = ren_vdc4_resume,
> +};
> +
> +static int ren_vdc4_remove(struct platform_device *pdev);
> +
> +static int __devinit ren_vdc4_probe(struct platform_device *pdev)
> +{
> + struct fb_info *info;
> + struct ren_vdc4_priv *priv;
> + struct ren_vdc4_info *pdata = pdev->dev.platform_data;
> + struct resource *res;
> + void *buf;
> + int irq, error;
> +
> + if (!pdata) {
> + dev_err(&pdev->dev, "no platform data defined\n");
> + return -EINVAL;
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + irq = platform_get_irq(pdev, 0);
> + if (!res || irq < 0) {
> + dev_err(&pdev->dev, "cannot get platform resources\n");
> + return -ENOENT;
> + }
> +
> + priv = kzalloc(sizeof(*priv), GFP_KERNEL);
How about using devm_kzalloc() instead of kzalloc()?
It makes the code simpler.
> + if (!priv) {
> + dev_err(&pdev->dev, "cannot allocate device data\n");
> + return -ENOMEM;
> + }
> +
> + platform_set_drvdata(pdev, priv);
> +
> + error = request_irq(irq, ren_vdc4_irq, 0, dev_name(&pdev->dev), priv);
How about using devm_request_irq()instead of request_irq()?
It makes the code simpler.
> + if (error) {
> + dev_err(&pdev->dev, "unable to request irq\n");
> + goto err1;
> + }
> +
> + priv->irq = irq;
> + pdata = pdev->dev.platform_data;
> +
> + priv->cfg = pdata;
> +
> + error = ren_vdc4_setup_clocks(pdev, pdata->clock_source, priv);
> + if (error) {
> + dev_err(&pdev->dev, "unable to setup clocks\n");
> + goto err1;
> + }
> +
> + priv->base = ioremap_nocache(res->start, resource_size(res));
How about using devm_ioremap_nocache() instead of ioremap_nocache()?
It makes the code simpler.
> + if (!priv->base) {
> + dev_err(&pdev->dev, "unable to ioremap\n");
> + goto err1;
> + }
> +
> + priv->info = framebuffer_alloc(0, &pdev->dev);
> + if (!priv->info) {
> + dev_err(&pdev->dev, "unable to allocate fb_info\n");
> + goto err1;
> + }
> +
> + info = priv->info;
> + info->fbops = &ren_vdc4_ops;
> + info->var.xres = info->var.xres_virtual = pdata->lcd_cfg.xres;
> + info->var.yres = info->var.yres_virtual = pdata->lcd_cfg.yres;
> + info->var.width = pdata->panel_width;
> + info->var.height = pdata->panel_height;
> + info->var.activate = FB_ACTIVATE_NOW;
> + info->pseudo_palette = priv->pseudo_palette;
> + error = ren_vdc4_set_bpp(&info->var, pdata->bpp);
> + if (error)
> + goto err1;
> +
> + info->fix = ren_vdc4_fix;
> + info->fix.line_length = pdata->lcd_cfg.xres * (pdata->bpp / 8);
> + info->fix.smem_len = info->fix.line_length * pdata->lcd_cfg.yres;
> +
> + buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
> + &priv->dma_handle, GFP_KERNEL);
> + if (!buf) {
> + dev_err(&pdev->dev, "unable to allocate buffer\n");
> + goto err1;
> + }
> +
> + info->flags = FBINFO_FLAG_DEFAULT;
> +
> + error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
> + if (error < 0) {
> + dev_err(&pdev->dev, "unable to allocate cmap\n");
> + goto err1;
> + }
> +
> + memset(buf, 0, info->fix.smem_len);
> + info->fix.smem_start = priv->dma_handle;
> + info->screen_base = buf;
> + info->device = &pdev->dev;
> + info->par = priv;
> +
> + if (error)
> + goto err1;
> +
> + ren_vdc4_start(priv, pdata->clock_source);
Return value should be checked as follow:
+ error = ren_vdc4_start(priv, pdata->clock_source);
> + if (error) {
> + dev_err(&pdev->dev, "unable to start hardware\n");
> + goto err1;
> + }
> +
> + info = priv->info;
> +
> + error = register_framebuffer(info);
> + if (error < 0)
> + goto err1;
> +
> + dev_info(info->dev,
> + "registered %s as %udx%ud %dbpp.\n",
> + pdev->name,
> + (int) pdata->lcd_cfg.xres,
> + (int) pdata->lcd_cfg.yres,
> + pdata->bpp);
> +
> + return 0;
> +
> +err1:
> + ren_vdc4_remove(pdev);
> + return error;
> +}
> +
> +static int ren_vdc4_remove(struct platform_device *pdev)
> +{
> + struct ren_vdc4_priv *priv = platform_get_drvdata(pdev);
> + struct fb_info *info;
> +
> + if (priv->info->dev)
> + unregister_framebuffer(priv->info);
> +
> + ren_vdc4_stop(priv);
> +
> + info = priv->info;
> +
> + if (!info || !info->device) {
> + dev_err(&pdev->dev, "Failed to dealloc/release fb_info\n");
> + } else {
> + fb_dealloc_cmap(&info->cmap);
> + framebuffer_release(info);
> + }
> +
> + if (priv->dot_clk)
> + clk_put(priv->dot_clk);
> + clk_put(priv->clk);
If devm_clk_get() is used in probe(), this clk_put() is not needed.
> +
> + if (priv->base)
> + iounmap(priv->base);
If devm_ioremap_nocache()is used in probe(), this iounmap() is not
needed.
> +
> + if (priv->irq)
> + free_irq(priv->irq, priv);
If devm_request_irq()is used in probe(), this free_irq() is not needed.
> +
> + kfree(priv);
If devm_kzalloc() is used in probe(), this kfree() is not needed.
> + return 0;
> +}
> +
> +static struct platform_driver ren_vdc4_driver = {
> + .driver = {
> + .name = "ren_vdc4fb",
> + .owner = THIS_MODULE,
> + .pm = &ren_vdc4_dev_pm_ops,
> + },
> + .probe = ren_vdc4_probe,
> + .remove = ren_vdc4_remove,
> +};
> +
> +static int __init ren_vdc4_init(void)
> +{
> + return platform_driver_register(&ren_vdc4_driver);
> +}
> +
> +static void __exit ren_vdc4_exit(void)
> +{
> + platform_driver_unregister(&ren_vdc4_driver);
> +}
> +
> +module_init(ren_vdc4_init);
> +module_exit(ren_vdc4_exit);
> +
> +MODULE_DESCRIPTION("Renesas VDC4 Framebuffer driver");
> +MODULE_AUTHOR("Phil Edworthy <phil.edworthy@xxxxxxxxxxx>");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/video/ren_vdc4fb.h b/include/video/ren_vdc4fb.h
> new file mode 100644
> index 0000000..e91a515
> --- /dev/null
> +++ b/include/video/ren_vdc4fb.h
> @@ -0,0 +1,19 @@
> +#ifndef __REN_VDC4_H__
> +#define __REN_VDC4_H__
> +
> +#include <linux/fb.h>
> +
> +enum { VDC4_EXTCLK = 1, VDC4_PERI_CLK };
> +
> +struct ren_vdc4_info {
> + int bpp;
> + int clock_source;
> + int clock_divider;
> + int hs_pulse_width;
> + int hs_start_pos;
> + struct fb_videomode lcd_cfg;
> + unsigned long panel_width;
> + unsigned long panel_height;
> +};
> +
> +#endif
> --
> 1.7.5.4
>
> --
--
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