linux/drivers/gpu/drm/exynos/exynos_drm_fimd.c
Sachin Kamat 16e197417d drm/exynos: Remove redundant check in exynos_drm_fimd.c file
devm_request_and_ioremap function checks the validity of the
pointer returned by platform_get_resource. Hence an additional check
in the probe function is not necessary.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-09-13 12:38:07 +09:00

994 lines
24 KiB
C

/* 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 <linux/pm_runtime.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 ovl_width;
unsigned int ovl_height;
unsigned int fb_width;
unsigned int fb_height;
unsigned int bpp;
dma_addr_t dma_addr;
void __iomem *vaddr;
unsigned int buf_offsize;
unsigned int line_size; /* bytes */
bool enabled;
};
struct fimd_context {
struct exynos_drm_subdrv subdrv;
int irq;
struct drm_crtc *crtc;
struct clk *bus_clk;
struct clk *lcd_clk;
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;
bool suspended;
struct mutex lock;
struct exynos_drm_panel_info *panel;
};
static bool fimd_display_is_connected(struct device *dev)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
/* TODO. */
return true;
}
static void *fimd_get_panel(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
return ctx->panel;
}
static int fimd_check_timing(struct device *dev, void *timing)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
/* TODO. */
return 0;
}
static int fimd_display_power_on(struct device *dev, int mode)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
/* TODO */
return 0;
}
static struct exynos_drm_display_ops fimd_display_ops = {
.type = EXYNOS_DISPLAY_TYPE_LCD,
.is_connected = fimd_display_is_connected,
.get_panel = fimd_get_panel,
.check_timing = fimd_check_timing,
.power_on = fimd_display_power_on,
};
static void fimd_dpms(struct device *subdrv_dev, int mode)
{
struct fimd_context *ctx = get_fimd_context(subdrv_dev);
DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
mutex_lock(&ctx->lock);
switch (mode) {
case DRM_MODE_DPMS_ON:
/*
* enable fimd hardware only if suspended status.
*
* P.S. fimd_dpms function would be called at booting time so
* clk_enable could be called double time.
*/
if (ctx->suspended)
pm_runtime_get_sync(subdrv_dev);
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_OFF:
if (!ctx->suspended)
pm_runtime_put_sync(subdrv_dev);
break;
default:
DRM_DEBUG_KMS("unspecified mode %d\n", mode);
break;
}
mutex_unlock(&ctx->lock);
}
static void fimd_apply(struct device *subdrv_dev)
{
struct fimd_context *ctx = get_fimd_context(subdrv_dev);
struct exynos_drm_manager *mgr = ctx->subdrv.manager;
struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
struct fimd_win_data *win_data;
int i;
DRM_DEBUG_KMS("%s\n", __FILE__);
for (i = 0; i < WINDOWS_NR; i++) {
win_data = &ctx->win_data[i];
if (win_data->enabled && (ovl_ops && ovl_ops->commit))
ovl_ops->commit(subdrv_dev, i);
}
if (mgr_ops && mgr_ops->commit)
mgr_ops->commit(subdrv_dev);
}
static void fimd_commit(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
struct exynos_drm_panel_info *panel = ctx->panel;
struct fb_videomode *timing = &panel->timing;
u32 val;
if (ctx->suspended)
return;
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 (ctx->suspended)
return -EPERM;
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 (ctx->suspended)
return;
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 = {
.dpms = fimd_dpms,
.apply = fimd_apply,
.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;
int win;
unsigned long offset;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (!overlay) {
dev_err(dev, "overlay is NULL\n");
return;
}
win = overlay->zpos;
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
if (win < 0 || win > WINDOWS_NR)
return;
offset = overlay->fb_x * (overlay->bpp >> 3);
offset += overlay->fb_y * overlay->pitch;
DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
win_data = &ctx->win_data[win];
win_data->offset_x = overlay->crtc_x;
win_data->offset_y = overlay->crtc_y;
win_data->ovl_width = overlay->crtc_width;
win_data->ovl_height = overlay->crtc_height;
win_data->fb_width = overlay->fb_width;
win_data->fb_height = overlay->fb_height;
win_data->dma_addr = overlay->dma_addr[0] + offset;
win_data->vaddr = overlay->vaddr[0] + offset;
win_data->bpp = overlay->bpp;
win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
(overlay->bpp >> 3);
win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
win_data->offset_x, win_data->offset_y);
DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
win_data->ovl_width, win_data->ovl_height);
DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
(unsigned long)win_data->dma_addr,
(unsigned long)win_data->vaddr);
DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
overlay->fb_width, overlay->crtc_width);
}
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, int zpos)
{
struct fimd_context *ctx = get_fimd_context(dev);
struct fimd_win_data *win_data;
int win = zpos;
unsigned long val, alpha, size;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (ctx->suspended)
return;
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
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 = (unsigned long)win_data->dma_addr;
writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
/* buffer end address */
size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3);
val = (unsigned long)(win_data->dma_addr + 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->dma_addr, val, size);
DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
win_data->ovl_width, win_data->ovl_height);
/* 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->ovl_width - 1) |
VIDOSDxB_BOTRIGHT_Y(win_data->offset_y +
win_data->ovl_height - 1);
writel(val, ctx->regs + VIDOSD_B(win));
DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
win_data->offset_x, win_data->offset_y,
win_data->offset_x + win_data->ovl_width - 1,
win_data->offset_y + win_data->ovl_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->ovl_width * win_data->ovl_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);
/* wincon */
val = readl(ctx->regs + WINCON(win));
val |= WINCONx_ENWIN;
writel(val, ctx->regs + WINCON(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);
win_data->enabled = true;
}
static void fimd_win_disable(struct device *dev, int zpos)
{
struct fimd_context *ctx = get_fimd_context(dev);
struct fimd_win_data *win_data;
int win = zpos;
u32 val;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
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);
win_data->enabled = false;
}
static struct exynos_drm_overlay_ops fimd_overlay_ops = {
.mode_set = fimd_win_mode_set,
.commit = fimd_win_commit,
.disable = fimd_win_disable,
};
static struct exynos_drm_manager fimd_manager = {
.pipe = -1,
.ops = &fimd_manager_ops,
.overlay_ops = &fimd_overlay_ops,
.display_ops = &fimd_display_ops,
};
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;
bool is_checked = false;
spin_lock_irqsave(&drm_dev->event_lock, flags);
list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
base.link) {
/* if event's pipe isn't same as crtc then ignore it. */
if (crtc != e->pipe)
continue;
is_checked = true;
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);
}
if (is_checked) {
/*
* call drm_vblank_put only in case that drm_vblank_get was
* called.
*/
if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0)
drm_vblank_put(drm_dev, crtc);
/*
* don't off vblank if vblank_disable_allowed is 1,
* because vblank would be off by timer handler.
*/
if (!drm_dev->vblank_disable_allowed)
drm_vblank_off(drm_dev, crtc);
}
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 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);
/* check the crtc is detached already from encoder */
if (manager->pipe < 0)
goto out;
drm_handle_vblank(drm_dev, manager->pipe);
fimd_finish_pageflip(drm_dev, manager->pipe);
out:
return IRQ_HANDLED;
}
static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
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.(after drm_vblank_put function is called)
*/
drm_dev->vblank_disable_allowed = 1;
return 0;
}
static void fimd_subdrv_remove(struct drm_device *drm_dev)
{
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 fimd_power_on(struct fimd_context *ctx, bool enable)
{
struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
struct device *dev = subdrv->dev;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (enable != false && enable != true)
return -EINVAL;
if (enable) {
int ret;
ret = clk_enable(ctx->bus_clk);
if (ret < 0)
return ret;
ret = clk_enable(ctx->lcd_clk);
if (ret < 0) {
clk_disable(ctx->bus_clk);
return ret;
}
ctx->suspended = false;
/* if vblank was enabled status, enable it again. */
if (test_and_clear_bit(0, &ctx->irq_flags))
fimd_enable_vblank(dev);
fimd_apply(dev);
} else {
clk_disable(ctx->lcd_clk);
clk_disable(ctx->bus_clk);
ctx->suspended = true;
}
return 0;
}
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 exynos_drm_panel_info *panel;
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;
}
panel = &pdata->panel;
if (!panel) {
dev_err(dev, "panel is null.\n");
return -EINVAL;
}
ctx = devm_kzalloc(&pdev->dev, 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;
}
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;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ctx->regs = devm_request_and_ioremap(&pdev->dev, res);
if (!ctx->regs) {
dev_err(dev, "failed to map registers\n");
ret = -ENXIO;
goto err_clk;
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(dev, "irq request failed.\n");
goto err_clk;
}
ctx->irq = res->start;
ret = devm_request_irq(&pdev->dev, ctx->irq, fimd_irq_handler,
0, "drm_fimd", ctx);
if (ret) {
dev_err(dev, "irq request failed.\n");
goto err_clk;
}
ctx->vidcon0 = pdata->vidcon0;
ctx->vidcon1 = pdata->vidcon1;
ctx->default_win = pdata->default_win;
ctx->panel = panel;
subdrv = &ctx->subdrv;
subdrv->dev = dev;
subdrv->manager = &fimd_manager;
subdrv->probe = fimd_subdrv_probe;
subdrv->remove = fimd_subdrv_remove;
mutex_init(&ctx->lock);
platform_set_drvdata(pdev, ctx);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing);
panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv;
DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
panel->timing.pixclock, ctx->clkdiv);
for (win = 0; win < WINDOWS_NR; win++)
fimd_clear_win(ctx, win);
exynos_drm_subdrv_register(subdrv);
return 0;
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:
return ret;
}
static int __devexit fimd_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fimd_context *ctx = platform_get_drvdata(pdev);
DRM_DEBUG_KMS("%s\n", __FILE__);
exynos_drm_subdrv_unregister(&ctx->subdrv);
if (ctx->suspended)
goto out;
clk_disable(ctx->lcd_clk);
clk_disable(ctx->bus_clk);
pm_runtime_set_suspended(dev);
pm_runtime_put_sync(dev);
out:
pm_runtime_disable(dev);
clk_put(ctx->lcd_clk);
clk_put(ctx->bus_clk);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int fimd_suspend(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
if (pm_runtime_suspended(dev))
return 0;
/*
* do not use pm_runtime_suspend(). if pm_runtime_suspend() is
* called here, an error would be returned by that interface
* because the usage_count of pm runtime is more than 1.
*/
return fimd_power_on(ctx, false);
}
static int fimd_resume(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
/*
* if entered to sleep when lcd panel was on, the usage_count
* of pm runtime would still be 1 so in this case, fimd driver
* should be on directly not drawing on pm runtime interface.
*/
if (!pm_runtime_suspended(dev))
return fimd_power_on(ctx, true);
return 0;
}
#endif
#ifdef CONFIG_PM_RUNTIME
static int fimd_runtime_suspend(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
return fimd_power_on(ctx, false);
}
static int fimd_runtime_resume(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
return fimd_power_on(ctx, true);
}
#endif
static const struct dev_pm_ops fimd_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume)
SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL)
};
struct platform_driver fimd_driver = {
.probe = fimd_probe,
.remove = __devexit_p(fimd_remove),
.driver = {
.name = "exynos4-fb",
.owner = THIS_MODULE,
.pm = &fimd_pm_ops,
},
};