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path: root/drivers/gpu/drm/exynos/exynos_drm_fimd.c
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_fimd.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_fimd.c796
1 files changed, 796 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
new file mode 100644
index 000000000000..620ad2d51368
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -0,0 +1,796 @@
+/* exynos_drm_fimd.c
+ *
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Authors:
+ * Joonyoung Shim <jy0922.shim@samsung.com>
+ * Inki Dae <inki.dae@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include "drmP.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+#include <drm/exynos_drm.h>
+#include <plat/regs-fb-v4.h>
+
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fbdev.h"
+#include "exynos_drm_crtc.h"
+
+/*
+ * FIMD is stand for Fully Interactive Mobile Display and
+ * as a display controller, it transfers contents drawn on memory
+ * to a LCD Panel through Display Interfaces such as RGB or
+ * CPU Interface.
+ */
+
+/* position control register for hardware window 0, 2 ~ 4.*/
+#define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16)
+#define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16)
+/* size control register for hardware window 0. */
+#define VIDOSD_C_SIZE_W0 (VIDOSD_BASE + 0x08)
+/* alpha control register for hardware window 1 ~ 4. */
+#define VIDOSD_C(win) (VIDOSD_BASE + 0x18 + (win) * 16)
+/* size control register for hardware window 1 ~ 4. */
+#define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16)
+
+#define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
+#define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
+#define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
+
+/* color key control register for hardware window 1 ~ 4. */
+#define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + (x * 8))
+/* color key value register for hardware window 1 ~ 4. */
+#define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + (x * 8))
+
+/* FIMD has totally five hardware windows. */
+#define WINDOWS_NR 5
+
+#define get_fimd_context(dev) platform_get_drvdata(to_platform_device(dev))
+
+struct fimd_win_data {
+ unsigned int offset_x;
+ unsigned int offset_y;
+ unsigned int width;
+ unsigned int height;
+ unsigned int bpp;
+ dma_addr_t paddr;
+ void __iomem *vaddr;
+ unsigned int buf_offsize;
+ unsigned int line_size; /* bytes */
+};
+
+struct fimd_context {
+ struct exynos_drm_subdrv subdrv;
+ int irq;
+ struct drm_crtc *crtc;
+ struct clk *bus_clk;
+ struct clk *lcd_clk;
+ struct resource *regs_res;
+ void __iomem *regs;
+ struct fimd_win_data win_data[WINDOWS_NR];
+ unsigned int clkdiv;
+ unsigned int default_win;
+ unsigned long irq_flags;
+ u32 vidcon0;
+ u32 vidcon1;
+
+ struct fb_videomode *timing;
+};
+
+static bool fimd_display_is_connected(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+
+ return true;
+}
+
+static void *fimd_get_timing(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ return ctx->timing;
+}
+
+static int fimd_check_timing(struct device *dev, void *timing)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+
+ return 0;
+}
+
+static int fimd_display_power_on(struct device *dev, int mode)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+
+ return 0;
+}
+
+static struct exynos_drm_display fimd_display = {
+ .type = EXYNOS_DISPLAY_TYPE_LCD,
+ .is_connected = fimd_display_is_connected,
+ .get_timing = fimd_get_timing,
+ .check_timing = fimd_check_timing,
+ .power_on = fimd_display_power_on,
+};
+
+static void fimd_commit(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ struct fb_videomode *timing = ctx->timing;
+ u32 val;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* setup polarity values from machine code. */
+ writel(ctx->vidcon1, ctx->regs + VIDCON1);
+
+ /* setup vertical timing values. */
+ val = VIDTCON0_VBPD(timing->upper_margin - 1) |
+ VIDTCON0_VFPD(timing->lower_margin - 1) |
+ VIDTCON0_VSPW(timing->vsync_len - 1);
+ writel(val, ctx->regs + VIDTCON0);
+
+ /* setup horizontal timing values. */
+ val = VIDTCON1_HBPD(timing->left_margin - 1) |
+ VIDTCON1_HFPD(timing->right_margin - 1) |
+ VIDTCON1_HSPW(timing->hsync_len - 1);
+ writel(val, ctx->regs + VIDTCON1);
+
+ /* setup horizontal and vertical display size. */
+ val = VIDTCON2_LINEVAL(timing->yres - 1) |
+ VIDTCON2_HOZVAL(timing->xres - 1);
+ writel(val, ctx->regs + VIDTCON2);
+
+ /* setup clock source, clock divider, enable dma. */
+ val = ctx->vidcon0;
+ val &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
+
+ if (ctx->clkdiv > 1)
+ val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
+ else
+ val &= ~VIDCON0_CLKDIR; /* 1:1 clock */
+
+ /*
+ * fields of register with prefix '_F' would be updated
+ * at vsync(same as dma start)
+ */
+ val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
+ writel(val, ctx->regs + VIDCON0);
+}
+
+static int fimd_enable_vblank(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ u32 val;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (!test_and_set_bit(0, &ctx->irq_flags)) {
+ val = readl(ctx->regs + VIDINTCON0);
+
+ val |= VIDINTCON0_INT_ENABLE;
+ val |= VIDINTCON0_INT_FRAME;
+
+ val &= ~VIDINTCON0_FRAMESEL0_MASK;
+ val |= VIDINTCON0_FRAMESEL0_VSYNC;
+ val &= ~VIDINTCON0_FRAMESEL1_MASK;
+ val |= VIDINTCON0_FRAMESEL1_NONE;
+
+ writel(val, ctx->regs + VIDINTCON0);
+ }
+
+ return 0;
+}
+
+static void fimd_disable_vblank(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ u32 val;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (test_and_clear_bit(0, &ctx->irq_flags)) {
+ val = readl(ctx->regs + VIDINTCON0);
+
+ val &= ~VIDINTCON0_INT_FRAME;
+ val &= ~VIDINTCON0_INT_ENABLE;
+
+ writel(val, ctx->regs + VIDINTCON0);
+ }
+}
+
+static struct exynos_drm_manager_ops fimd_manager_ops = {
+ .commit = fimd_commit,
+ .enable_vblank = fimd_enable_vblank,
+ .disable_vblank = fimd_disable_vblank,
+};
+
+static void fimd_win_mode_set(struct device *dev,
+ struct exynos_drm_overlay *overlay)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ struct fimd_win_data *win_data;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (!overlay) {
+ dev_err(dev, "overlay is NULL\n");
+ return;
+ }
+
+ win_data = &ctx->win_data[ctx->default_win];
+
+ win_data->offset_x = overlay->offset_x;
+ win_data->offset_y = overlay->offset_y;
+ win_data->width = overlay->width;
+ win_data->height = overlay->height;
+ win_data->paddr = overlay->paddr;
+ win_data->vaddr = overlay->vaddr;
+ win_data->bpp = overlay->bpp;
+ win_data->buf_offsize = overlay->buf_offsize * (overlay->bpp >> 3);
+ win_data->line_size = overlay->line_size * (overlay->bpp >> 3);
+}
+
+static void fimd_win_set_pixfmt(struct device *dev, unsigned int win)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ struct fimd_win_data *win_data = &ctx->win_data[win];
+ unsigned long val;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ val = WINCONx_ENWIN;
+
+ switch (win_data->bpp) {
+ case 1:
+ val |= WINCON0_BPPMODE_1BPP;
+ val |= WINCONx_BITSWP;
+ val |= WINCONx_BURSTLEN_4WORD;
+ break;
+ case 2:
+ val |= WINCON0_BPPMODE_2BPP;
+ val |= WINCONx_BITSWP;
+ val |= WINCONx_BURSTLEN_8WORD;
+ break;
+ case 4:
+ val |= WINCON0_BPPMODE_4BPP;
+ val |= WINCONx_BITSWP;
+ val |= WINCONx_BURSTLEN_8WORD;
+ break;
+ case 8:
+ val |= WINCON0_BPPMODE_8BPP_PALETTE;
+ val |= WINCONx_BURSTLEN_8WORD;
+ val |= WINCONx_BYTSWP;
+ break;
+ case 16:
+ val |= WINCON0_BPPMODE_16BPP_565;
+ val |= WINCONx_HAWSWP;
+ val |= WINCONx_BURSTLEN_16WORD;
+ break;
+ case 24:
+ val |= WINCON0_BPPMODE_24BPP_888;
+ val |= WINCONx_WSWP;
+ val |= WINCONx_BURSTLEN_16WORD;
+ break;
+ case 32:
+ val |= WINCON1_BPPMODE_28BPP_A4888
+ | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
+ val |= WINCONx_WSWP;
+ val |= WINCONx_BURSTLEN_16WORD;
+ break;
+ default:
+ DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
+
+ val |= WINCON0_BPPMODE_24BPP_888;
+ val |= WINCONx_WSWP;
+ val |= WINCONx_BURSTLEN_16WORD;
+ break;
+ }
+
+ DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp);
+
+ writel(val, ctx->regs + WINCON(win));
+}
+
+static void fimd_win_set_colkey(struct device *dev, unsigned int win)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ unsigned int keycon0 = 0, keycon1 = 0;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
+ WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
+
+ keycon1 = WxKEYCON1_COLVAL(0xffffffff);
+
+ writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
+ writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
+}
+
+static void fimd_win_commit(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ struct fimd_win_data *win_data;
+ int win = ctx->default_win;
+ unsigned long val, alpha, size;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (win < 0 || win > WINDOWS_NR)
+ return;
+
+ win_data = &ctx->win_data[win];
+
+ /*
+ * SHADOWCON register is used for enabling timing.
+ *
+ * for example, once only width value of a register is set,
+ * if the dma is started then fimd hardware could malfunction so
+ * with protect window setting, the register fields with prefix '_F'
+ * wouldn't be updated at vsync also but updated once unprotect window
+ * is set.
+ */
+
+ /* protect windows */
+ val = readl(ctx->regs + SHADOWCON);
+ val |= SHADOWCON_WINx_PROTECT(win);
+ writel(val, ctx->regs + SHADOWCON);
+
+ /* buffer start address */
+ val = win_data->paddr;
+ writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
+
+ /* buffer end address */
+ size = win_data->width * win_data->height * (win_data->bpp >> 3);
+ val = win_data->paddr + size;
+ writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
+
+ DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
+ (unsigned long)win_data->paddr, val, size);
+
+ /* buffer size */
+ val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) |
+ VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size);
+ writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
+
+ /* OSD position */
+ val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) |
+ VIDOSDxA_TOPLEFT_Y(win_data->offset_y);
+ writel(val, ctx->regs + VIDOSD_A(win));
+
+ val = VIDOSDxB_BOTRIGHT_X(win_data->offset_x + win_data->width - 1) |
+ VIDOSDxB_BOTRIGHT_Y(win_data->offset_y + win_data->height - 1);
+ writel(val, ctx->regs + VIDOSD_B(win));
+
+ DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %x\n",
+ win_data->offset_x, win_data->offset_y,
+ win_data->offset_x + win_data->width - 1,
+ win_data->offset_y + win_data->height - 1);
+
+ /* hardware window 0 doesn't support alpha channel. */
+ if (win != 0) {
+ /* OSD alpha */
+ alpha = VIDISD14C_ALPHA1_R(0xf) |
+ VIDISD14C_ALPHA1_G(0xf) |
+ VIDISD14C_ALPHA1_B(0xf);
+
+ writel(alpha, ctx->regs + VIDOSD_C(win));
+ }
+
+ /* OSD size */
+ if (win != 3 && win != 4) {
+ u32 offset = VIDOSD_D(win);
+ if (win == 0)
+ offset = VIDOSD_C_SIZE_W0;
+ val = win_data->width * win_data->height;
+ writel(val, ctx->regs + offset);
+
+ DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
+ }
+
+ fimd_win_set_pixfmt(dev, win);
+
+ /* hardware window 0 doesn't support color key. */
+ if (win != 0)
+ fimd_win_set_colkey(dev, win);
+
+ /* Enable DMA channel and unprotect windows */
+ val = readl(ctx->regs + SHADOWCON);
+ val |= SHADOWCON_CHx_ENABLE(win);
+ val &= ~SHADOWCON_WINx_PROTECT(win);
+ writel(val, ctx->regs + SHADOWCON);
+}
+
+static void fimd_win_disable(struct device *dev)
+{
+ struct fimd_context *ctx = get_fimd_context(dev);
+ struct fimd_win_data *win_data;
+ int win = ctx->default_win;
+ u32 val;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (win < 0 || win > WINDOWS_NR)
+ return;
+
+ win_data = &ctx->win_data[win];
+
+ /* protect windows */
+ val = readl(ctx->regs + SHADOWCON);
+ val |= SHADOWCON_WINx_PROTECT(win);
+ writel(val, ctx->regs + SHADOWCON);
+
+ /* wincon */
+ val = readl(ctx->regs + WINCON(win));
+ val &= ~WINCONx_ENWIN;
+ writel(val, ctx->regs + WINCON(win));
+
+ /* unprotect windows */
+ val = readl(ctx->regs + SHADOWCON);
+ val &= ~SHADOWCON_CHx_ENABLE(win);
+ val &= ~SHADOWCON_WINx_PROTECT(win);
+ writel(val, ctx->regs + SHADOWCON);
+}
+
+static struct exynos_drm_overlay_ops fimd_overlay_ops = {
+ .mode_set = fimd_win_mode_set,
+ .commit = fimd_win_commit,
+ .disable = fimd_win_disable,
+};
+
+/* for pageflip event */
+static void fimd_finish_pageflip(struct drm_device *drm_dev, int crtc)
+{
+ struct exynos_drm_private *dev_priv = drm_dev->dev_private;
+ struct drm_pending_vblank_event *e, *t;
+ struct timeval now;
+ unsigned long flags;
+
+ if (!dev_priv->pageflip_event)
+ return;
+
+ spin_lock_irqsave(&drm_dev->event_lock, flags);
+
+ exynos_drm_crtc_apply(dev_priv->crtc[crtc]);
+
+ list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
+ base.link) {
+ do_gettimeofday(&now);
+ e->event.sequence = 0;
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+
+ list_move_tail(&e->base.link, &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ }
+
+ drm_vblank_put(drm_dev, crtc);
+ dev_priv->pageflip_event = false;
+
+ spin_unlock_irqrestore(&drm_dev->event_lock, flags);
+}
+
+static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
+{
+ struct fimd_context *ctx = (struct fimd_context *)dev_id;
+ struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
+ struct drm_device *drm_dev = subdrv->drm_dev;
+ struct device *dev = subdrv->manager.dev;
+ struct exynos_drm_manager *manager = &subdrv->manager;
+ u32 val;
+
+ val = readl(ctx->regs + VIDINTCON1);
+
+ if (val & VIDINTCON1_INT_FRAME)
+ /* VSYNC interrupt */
+ writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
+
+ drm_handle_vblank(drm_dev, manager->pipe);
+ fimd_finish_pageflip(drm_dev, manager->pipe);
+
+ return IRQ_HANDLED;
+}
+
+static int fimd_subdrv_probe(struct drm_device *drm_dev)
+{
+ struct drm_driver *drm_driver = drm_dev->driver;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * enable drm irq mode.
+ * - with irq_enabled = 1, we can use the vblank feature.
+ *
+ * P.S. note that we wouldn't use drm irq handler but
+ * just specific driver own one instead because
+ * drm framework supports only one irq handler.
+ */
+ drm_dev->irq_enabled = 1;
+
+ /*
+ * with vblank_disable_allowed = 1, vblank interrupt will be disabled
+ * by drm timer once a current process gives up ownership of
+ * vblank event.(drm_vblank_put function was called)
+ */
+ drm_dev->vblank_disable_allowed = 1;
+
+ return 0;
+}
+
+static void fimd_subdrv_remove(struct drm_device *drm_dev)
+{
+ struct drm_driver *drm_driver = drm_dev->driver;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+}
+
+static int fimd_calc_clkdiv(struct fimd_context *ctx,
+ struct fb_videomode *timing)
+{
+ unsigned long clk = clk_get_rate(ctx->lcd_clk);
+ u32 retrace;
+ u32 clkdiv;
+ u32 best_framerate = 0;
+ u32 framerate;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ retrace = timing->left_margin + timing->hsync_len +
+ timing->right_margin + timing->xres;
+ retrace *= timing->upper_margin + timing->vsync_len +
+ timing->lower_margin + timing->yres;
+
+ /* default framerate is 60Hz */
+ if (!timing->refresh)
+ timing->refresh = 60;
+
+ clk /= retrace;
+
+ for (clkdiv = 1; clkdiv < 0x100; clkdiv++) {
+ int tmp;
+
+ /* get best framerate */
+ framerate = clk / clkdiv;
+ tmp = timing->refresh - framerate;
+ if (tmp < 0) {
+ best_framerate = framerate;
+ continue;
+ } else {
+ if (!best_framerate)
+ best_framerate = framerate;
+ else if (tmp < (best_framerate - framerate))
+ best_framerate = framerate;
+ break;
+ }
+ }
+
+ return clkdiv;
+}
+
+static void fimd_clear_win(struct fimd_context *ctx, int win)
+{
+ u32 val;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ writel(0, ctx->regs + WINCON(win));
+ writel(0, ctx->regs + VIDOSD_A(win));
+ writel(0, ctx->regs + VIDOSD_B(win));
+ writel(0, ctx->regs + VIDOSD_C(win));
+
+ if (win == 1 || win == 2)
+ writel(0, ctx->regs + VIDOSD_D(win));
+
+ val = readl(ctx->regs + SHADOWCON);
+ val &= ~SHADOWCON_WINx_PROTECT(win);
+ writel(val, ctx->regs + SHADOWCON);
+}
+
+static int __devinit fimd_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct fimd_context *ctx;
+ struct exynos_drm_subdrv *subdrv;
+ struct exynos_drm_fimd_pdata *pdata;
+ struct fb_videomode *timing;
+ struct resource *res;
+ int win;
+ int ret = -EINVAL;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(dev, "no platform data specified\n");
+ return -EINVAL;
+ }
+
+ timing = &pdata->timing;
+ if (!timing) {
+ dev_err(dev, "timing is null.\n");
+ return -EINVAL;
+ }
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->bus_clk = clk_get(dev, "fimd");
+ if (IS_ERR(ctx->bus_clk)) {
+ dev_err(dev, "failed to get bus clock\n");
+ ret = PTR_ERR(ctx->bus_clk);
+ goto err_clk_get;
+ }
+
+ clk_enable(ctx->bus_clk);
+
+ ctx->lcd_clk = clk_get(dev, "sclk_fimd");
+ if (IS_ERR(ctx->lcd_clk)) {
+ dev_err(dev, "failed to get lcd clock\n");
+ ret = PTR_ERR(ctx->lcd_clk);
+ goto err_bus_clk;
+ }
+
+ clk_enable(ctx->lcd_clk);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "failed to find registers\n");
+ ret = -ENOENT;
+ goto err_clk;
+ }
+
+ ctx->regs_res = request_mem_region(res->start, resource_size(res),
+ dev_name(dev));
+ if (!ctx->regs_res) {
+ dev_err(dev, "failed to claim register region\n");
+ ret = -ENOENT;
+ goto err_clk;
+ }
+
+ ctx->regs = ioremap(res->start, resource_size(res));
+ if (!ctx->regs) {
+ dev_err(dev, "failed to map registers\n");
+ ret = -ENXIO;
+ goto err_req_region_io;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(dev, "irq request failed.\n");
+ goto err_req_region_irq;
+ }
+
+ ctx->irq = res->start;
+
+ for (win = 0; win < WINDOWS_NR; win++)
+ fimd_clear_win(ctx, win);
+
+ ret = request_irq(ctx->irq, fimd_irq_handler, 0, "drm_fimd", ctx);
+ if (ret < 0) {
+ dev_err(dev, "irq request failed.\n");
+ goto err_req_irq;
+ }
+
+ ctx->clkdiv = fimd_calc_clkdiv(ctx, timing);
+ ctx->vidcon0 = pdata->vidcon0;
+ ctx->vidcon1 = pdata->vidcon1;
+ ctx->default_win = pdata->default_win;
+ ctx->timing = timing;
+
+ timing->pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv;
+
+ DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
+ timing->pixclock, ctx->clkdiv);
+
+ subdrv = &ctx->subdrv;
+
+ subdrv->probe = fimd_subdrv_probe;
+ subdrv->remove = fimd_subdrv_remove;
+ subdrv->manager.pipe = -1;
+ subdrv->manager.ops = &fimd_manager_ops;
+ subdrv->manager.overlay_ops = &fimd_overlay_ops;
+ subdrv->manager.display = &fimd_display;
+ subdrv->manager.dev = dev;
+
+ platform_set_drvdata(pdev, ctx);
+ exynos_drm_subdrv_register(subdrv);
+
+ return 0;
+
+err_req_irq:
+err_req_region_irq:
+ iounmap(ctx->regs);
+
+err_req_region_io:
+ release_resource(ctx->regs_res);
+ kfree(ctx->regs_res);
+
+err_clk:
+ clk_disable(ctx->lcd_clk);
+ clk_put(ctx->lcd_clk);
+
+err_bus_clk:
+ clk_disable(ctx->bus_clk);
+ clk_put(ctx->bus_clk);
+
+err_clk_get:
+ kfree(ctx);
+ return ret;
+}
+
+static int __devexit fimd_remove(struct platform_device *pdev)
+{
+ struct fimd_context *ctx = platform_get_drvdata(pdev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ exynos_drm_subdrv_unregister(&ctx->subdrv);
+
+ clk_disable(ctx->lcd_clk);
+ clk_disable(ctx->bus_clk);
+ clk_put(ctx->lcd_clk);
+ clk_put(ctx->bus_clk);
+
+ iounmap(ctx->regs);
+ release_resource(ctx->regs_res);
+ kfree(ctx->regs_res);
+ free_irq(ctx->irq, ctx);
+
+ kfree(ctx);
+
+ return 0;
+}
+
+static struct platform_driver fimd_driver = {
+ .probe = fimd_probe,
+ .remove = __devexit_p(fimd_remove),
+ .driver = {
+ .name = "exynos4-fb",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init fimd_init(void)
+{
+ return platform_driver_register(&fimd_driver);
+}
+
+static void __exit fimd_exit(void)
+{
+ platform_driver_unregister(&fimd_driver);
+}
+
+module_init(fimd_init);
+module_exit(fimd_exit);
+
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
+MODULE_DESCRIPTION("Samsung DRM FIMD Driver");
+MODULE_LICENSE("GPL");
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