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linux/drivers/gpu/drm/exynos/exynos_drm_fimd.c

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/* 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 <drm/drmP.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/component.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <video/of_display_timing.h>
#include <video/of_videomode.h>
#include <video/samsung_fimd.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_fbdev.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_iommu.h"
/*
* FIMD stands 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.
*/
#define FIMD_DEFAULT_FRAMERATE 60
#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
/* 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 windows 0 and alpha control register
* for hardware windows 1 ~ 4
*/
#define VIDOSD_C(win) (VIDOSD_BASE + 0x08 + (win) * 16)
/* size control register for hardware windows 1 ~ 2. */
#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 - 1) * 8))
/* color key value register for hardware window 1 ~ 4. */
#define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + ((x - 1) * 8))
/* I80 / RGB trigger control register */
#define TRIGCON 0x1A4
#define TRGMODE_I80_RGB_ENABLE_I80 (1 << 0)
#define SWTRGCMD_I80_RGB_ENABLE (1 << 1)
/* display mode change control register except exynos4 */
#define VIDOUT_CON 0x000
#define VIDOUT_CON_F_I80_LDI0 (0x2 << 8)
/* I80 interface control for main LDI register */
#define I80IFCONFAx(x) (0x1B0 + (x) * 4)
#define I80IFCONFBx(x) (0x1B8 + (x) * 4)
#define LCD_CS_SETUP(x) ((x) << 16)
#define LCD_WR_SETUP(x) ((x) << 12)
#define LCD_WR_ACTIVE(x) ((x) << 8)
#define LCD_WR_HOLD(x) ((x) << 4)
#define I80IFEN_ENABLE (1 << 0)
/* FIMD has totally five hardware windows. */
#define WINDOWS_NR 5
struct fimd_driver_data {
unsigned int timing_base;
unsigned int lcdblk_offset;
unsigned int lcdblk_vt_shift;
unsigned int lcdblk_bypass_shift;
unsigned int has_shadowcon:1;
unsigned int has_clksel:1;
unsigned int has_limited_fmt:1;
unsigned int has_vidoutcon:1;
unsigned int has_vtsel:1;
};
static struct fimd_driver_data s3c64xx_fimd_driver_data = {
.timing_base = 0x0,
.has_clksel = 1,
.has_limited_fmt = 1,
};
static struct fimd_driver_data exynos3_fimd_driver_data = {
.timing_base = 0x20000,
.lcdblk_offset = 0x210,
.lcdblk_bypass_shift = 1,
.has_shadowcon = 1,
.has_vidoutcon = 1,
};
static struct fimd_driver_data exynos4_fimd_driver_data = {
.timing_base = 0x0,
.lcdblk_offset = 0x210,
.lcdblk_vt_shift = 10,
.lcdblk_bypass_shift = 1,
.has_shadowcon = 1,
.has_vtsel = 1,
};
static struct fimd_driver_data exynos4415_fimd_driver_data = {
.timing_base = 0x20000,
.lcdblk_offset = 0x210,
.lcdblk_vt_shift = 10,
.lcdblk_bypass_shift = 1,
.has_shadowcon = 1,
.has_vidoutcon = 1,
.has_vtsel = 1,
};
static struct fimd_driver_data exynos5_fimd_driver_data = {
.timing_base = 0x20000,
.lcdblk_offset = 0x214,
.lcdblk_vt_shift = 24,
.lcdblk_bypass_shift = 15,
.has_shadowcon = 1,
.has_vidoutcon = 1,
.has_vtsel = 1,
};
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;
unsigned int pixel_format;
dma_addr_t dma_addr;
unsigned int buf_offsize;
unsigned int line_size; /* bytes */
bool enabled;
bool resume;
};
struct fimd_context {
struct exynos_drm_manager manager;
struct device *dev;
struct drm_device *drm_dev;
struct clk *bus_clk;
struct clk *lcd_clk;
void __iomem *regs;
struct regmap *sysreg;
struct drm_display_mode mode;
struct fimd_win_data win_data[WINDOWS_NR];
unsigned int default_win;
unsigned long irq_flags;
u32 vidcon0;
u32 vidcon1;
u32 vidout_con;
u32 i80ifcon;
bool i80_if;
bool suspended;
int pipe;
wait_queue_head_t wait_vsync_queue;
atomic_t wait_vsync_event;
atomic_t win_updated;
atomic_t triggering;
struct exynos_drm_panel_info panel;
struct fimd_driver_data *driver_data;
struct exynos_drm_display *display;
};
static inline struct fimd_context *mgr_to_fimd(struct exynos_drm_manager *mgr)
{
return container_of(mgr, struct fimd_context, manager);
}
static const struct of_device_id fimd_driver_dt_match[] = {
{ .compatible = "samsung,s3c6400-fimd",
.data = &s3c64xx_fimd_driver_data },
{ .compatible = "samsung,exynos3250-fimd",
.data = &exynos3_fimd_driver_data },
{ .compatible = "samsung,exynos4210-fimd",
.data = &exynos4_fimd_driver_data },
{ .compatible = "samsung,exynos4415-fimd",
.data = &exynos4415_fimd_driver_data },
{ .compatible = "samsung,exynos5250-fimd",
.data = &exynos5_fimd_driver_data },
{},
};
MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
static inline struct fimd_driver_data *drm_fimd_get_driver_data(
struct platform_device *pdev)
{
const struct of_device_id *of_id =
of_match_device(fimd_driver_dt_match, &pdev->dev);
return (struct fimd_driver_data *)of_id->data;
}
static void fimd_wait_for_vblank(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
if (ctx->suspended)
return;
atomic_set(&ctx->wait_vsync_event, 1);
/*
* wait for FIMD to signal VSYNC interrupt or return after
* timeout which is set to 50ms (refresh rate of 20).
*/
if (!wait_event_timeout(ctx->wait_vsync_queue,
!atomic_read(&ctx->wait_vsync_event),
HZ/20))
DRM_DEBUG_KMS("vblank wait timed out.\n");
}
static void fimd_enable_video_output(struct fimd_context *ctx, int win,
bool enable)
{
u32 val = readl(ctx->regs + WINCON(win));
if (enable)
val |= WINCONx_ENWIN;
else
val &= ~WINCONx_ENWIN;
writel(val, ctx->regs + WINCON(win));
}
static void fimd_enable_shadow_channel_path(struct fimd_context *ctx, int win,
bool enable)
{
u32 val = readl(ctx->regs + SHADOWCON);
if (enable)
val |= SHADOWCON_CHx_ENABLE(win);
else
val &= ~SHADOWCON_CHx_ENABLE(win);
writel(val, ctx->regs + SHADOWCON);
}
static void fimd_clear_channel(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
int win, ch_enabled = 0;
DRM_DEBUG_KMS("%s\n", __FILE__);
/* Check if any channel is enabled. */
for (win = 0; win < WINDOWS_NR; win++) {
u32 val = readl(ctx->regs + WINCON(win));
if (val & WINCONx_ENWIN) {
fimd_enable_video_output(ctx, win, false);
if (ctx->driver_data->has_shadowcon)
fimd_enable_shadow_channel_path(ctx, win,
false);
ch_enabled = 1;
}
}
/* Wait for vsync, as disable channel takes effect at next vsync */
if (ch_enabled) {
unsigned int state = ctx->suspended;
ctx->suspended = 0;
fimd_wait_for_vblank(mgr);
ctx->suspended = state;
}
}
static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
struct drm_device *drm_dev)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct exynos_drm_private *priv;
priv = drm_dev->dev_private;
mgr->drm_dev = ctx->drm_dev = drm_dev;
mgr->pipe = ctx->pipe = priv->pipe++;
/* attach this sub driver to iommu mapping if supported. */
if (is_drm_iommu_supported(ctx->drm_dev)) {
/*
* If any channel is already active, iommu will throw
* a PAGE FAULT when enabled. So clear any channel if enabled.
*/
fimd_clear_channel(mgr);
drm_iommu_attach_device(ctx->drm_dev, ctx->dev);
}
return 0;
}
static void fimd_mgr_remove(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
/* detach this sub driver from iommu mapping if supported. */
if (is_drm_iommu_supported(ctx->drm_dev))
drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
}
static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
const struct drm_display_mode *mode)
{
unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
u32 clkdiv;
if (ctx->i80_if) {
/*
* The frame done interrupt should be occurred prior to the
* next TE signal.
*/
ideal_clk *= 2;
}
/* Find the clock divider value that gets us closest to ideal_clk */
clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->lcd_clk), ideal_clk);
return (clkdiv < 0x100) ? clkdiv : 0xff;
}
static bool fimd_mode_fixup(struct exynos_drm_manager *mgr,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
if (adjusted_mode->vrefresh == 0)
adjusted_mode->vrefresh = FIMD_DEFAULT_FRAMERATE;
return true;
}
static void fimd_mode_set(struct exynos_drm_manager *mgr,
const struct drm_display_mode *in_mode)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
drm_mode_copy(&ctx->mode, in_mode);
}
static void fimd_commit(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct drm_display_mode *mode = &ctx->mode;
struct fimd_driver_data *driver_data = ctx->driver_data;
void *timing_base = ctx->regs + driver_data->timing_base;
u32 val, clkdiv;
if (ctx->suspended)
return;
/* nothing to do if we haven't set the mode yet */
if (mode->htotal == 0 || mode->vtotal == 0)
return;
if (ctx->i80_if) {
val = ctx->i80ifcon | I80IFEN_ENABLE;
writel(val, timing_base + I80IFCONFAx(0));
/* disable auto frame rate */
writel(0, timing_base + I80IFCONFBx(0));
/* set video type selection to I80 interface */
if (driver_data->has_vtsel && ctx->sysreg &&
regmap_update_bits(ctx->sysreg,
driver_data->lcdblk_offset,
0x3 << driver_data->lcdblk_vt_shift,
0x1 << driver_data->lcdblk_vt_shift)) {
DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
return;
}
} else {
int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
u32 vidcon1;
/* setup polarity values */
vidcon1 = ctx->vidcon1;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
vidcon1 |= VIDCON1_INV_VSYNC;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
vidcon1 |= VIDCON1_INV_HSYNC;
writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
/* setup vertical timing values. */
vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
val = VIDTCON0_VBPD(vbpd - 1) |
VIDTCON0_VFPD(vfpd - 1) |
VIDTCON0_VSPW(vsync_len - 1);
writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
/* setup horizontal timing values. */
hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
val = VIDTCON1_HBPD(hbpd - 1) |
VIDTCON1_HFPD(hfpd - 1) |
VIDTCON1_HSPW(hsync_len - 1);
writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
}
if (driver_data->has_vidoutcon)
writel(ctx->vidout_con, timing_base + VIDOUT_CON);
/* set bypass selection */
if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
driver_data->lcdblk_offset,
0x1 << driver_data->lcdblk_bypass_shift,
0x1 << driver_data->lcdblk_bypass_shift)) {
DRM_ERROR("Failed to update sysreg for bypass setting.\n");
return;
}
/* setup horizontal and vertical display size. */
val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
VIDTCON2_HOZVAL(mode->hdisplay - 1) |
VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
/*
* fields of register with prefix '_F' would be updated
* at vsync(same as dma start)
*/
val = ctx->vidcon0;
val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
if (ctx->driver_data->has_clksel)
val |= VIDCON0_CLKSEL_LCD;
clkdiv = fimd_calc_clkdiv(ctx, mode);
if (clkdiv > 1)
val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
writel(val, ctx->regs + VIDCON0);
}
static int fimd_enable_vblank(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
u32 val;
if (ctx->suspended)
return -EPERM;
if (!test_and_set_bit(0, &ctx->irq_flags)) {
val = readl(ctx->regs + VIDINTCON0);
val |= VIDINTCON0_INT_ENABLE;
if (ctx->i80_if) {
val |= VIDINTCON0_INT_I80IFDONE;
val |= VIDINTCON0_INT_SYSMAINCON;
val &= ~VIDINTCON0_INT_SYSSUBCON;
} else {
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 exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
u32 val;
if (ctx->suspended)
return;
if (test_and_clear_bit(0, &ctx->irq_flags)) {
val = readl(ctx->regs + VIDINTCON0);
val &= ~VIDINTCON0_INT_ENABLE;
if (ctx->i80_if) {
val &= ~VIDINTCON0_INT_I80IFDONE;
val &= ~VIDINTCON0_INT_SYSMAINCON;
val &= ~VIDINTCON0_INT_SYSSUBCON;
} else
val &= ~VIDINTCON0_INT_FRAME;
writel(val, ctx->regs + VIDINTCON0);
}
}
static void fimd_win_mode_set(struct exynos_drm_manager *mgr,
struct exynos_drm_overlay *overlay)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct fimd_win_data *win_data;
int win;
unsigned long offset;
if (!overlay) {
DRM_ERROR("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->bpp = overlay->bpp;
win_data->pixel_format = overlay->pixel_format;
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\n", (unsigned long)win_data->dma_addr);
DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
overlay->fb_width, overlay->crtc_width);
}
static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win)
{
struct fimd_win_data *win_data = &ctx->win_data[win];
unsigned long val;
val = WINCONx_ENWIN;
/*
* In case of s3c64xx, window 0 doesn't support alpha channel.
* So the request format is ARGB8888 then change it to XRGB8888.
*/
if (ctx->driver_data->has_limited_fmt && !win) {
if (win_data->pixel_format == DRM_FORMAT_ARGB8888)
win_data->pixel_format = DRM_FORMAT_XRGB8888;
}
switch (win_data->pixel_format) {
case DRM_FORMAT_C8:
val |= WINCON0_BPPMODE_8BPP_PALETTE;
val |= WINCONx_BURSTLEN_8WORD;
val |= WINCONx_BYTSWP;
break;
case DRM_FORMAT_XRGB1555:
val |= WINCON0_BPPMODE_16BPP_1555;
val |= WINCONx_HAWSWP;
val |= WINCONx_BURSTLEN_16WORD;
break;
case DRM_FORMAT_RGB565:
val |= WINCON0_BPPMODE_16BPP_565;
val |= WINCONx_HAWSWP;
val |= WINCONx_BURSTLEN_16WORD;
break;
case DRM_FORMAT_XRGB8888:
val |= WINCON0_BPPMODE_24BPP_888;
val |= WINCONx_WSWP;
val |= WINCONx_BURSTLEN_16WORD;
break;
case DRM_FORMAT_ARGB8888:
val |= WINCON1_BPPMODE_25BPP_A1888
| 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);
/*
* In case of exynos, setting dma-burst to 16Word causes permanent
* tearing for very small buffers, e.g. cursor buffer. Burst Mode
* switching which is based on overlay size is not recommended as
* overlay size varies alot towards the end of the screen and rapid
* movement causes unstable DMA which results into iommu crash/tear.
*/
if (win_data->fb_width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
val &= ~WINCONx_BURSTLEN_MASK;
val |= WINCONx_BURSTLEN_4WORD;
}
writel(val, ctx->regs + WINCON(win));
}
static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
{
unsigned int keycon0 = 0, keycon1 = 0;
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));
}
/**
* shadow_protect_win() - disable updating values from shadow registers at vsync
*
* @win: window to protect registers for
* @protect: 1 to protect (disable updates)
*/
static void fimd_shadow_protect_win(struct fimd_context *ctx,
int win, bool protect)
{
u32 reg, bits, val;
if (ctx->driver_data->has_shadowcon) {
reg = SHADOWCON;
bits = SHADOWCON_WINx_PROTECT(win);
} else {
reg = PRTCON;
bits = PRTCON_PROTECT;
}
val = readl(ctx->regs + reg);
if (protect)
val |= bits;
else
val &= ~bits;
writel(val, ctx->regs + reg);
}
static void fimd_win_commit(struct exynos_drm_manager *mgr, int zpos)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct fimd_win_data *win_data;
int win = zpos;
unsigned long val, alpha, size;
unsigned int last_x;
unsigned int last_y;
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];
/* If suspended, enable this on resume */
if (ctx->suspended) {
win_data->resume = true;
return;
}
/*
* SHADOWCON/PRTCON 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 */
fimd_shadow_protect_win(ctx, win, true);
/* 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) |
VIDW_BUF_SIZE_OFFSET_E(win_data->buf_offsize) |
VIDW_BUF_SIZE_PAGEWIDTH_E(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) |
VIDOSDxA_TOPLEFT_X_E(win_data->offset_x) |
VIDOSDxA_TOPLEFT_Y_E(win_data->offset_y);
writel(val, ctx->regs + VIDOSD_A(win));
last_x = win_data->offset_x + win_data->ovl_width;
if (last_x)
last_x--;
last_y = win_data->offset_y + win_data->ovl_height;
if (last_y)
last_y--;
val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
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, last_x, last_y);
/* 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(win);
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(ctx, win);
/* hardware window 0 doesn't support color key. */
if (win != 0)
fimd_win_set_colkey(ctx, win);
fimd_enable_video_output(ctx, win, true);
if (ctx->driver_data->has_shadowcon)
fimd_enable_shadow_channel_path(ctx, win, true);
/* Enable DMA channel and unprotect windows */
fimd_shadow_protect_win(ctx, win, false);
win_data->enabled = true;
if (ctx->i80_if)
atomic_set(&ctx->win_updated, 1);
}
static void fimd_win_disable(struct exynos_drm_manager *mgr, int zpos)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct fimd_win_data *win_data;
int win = zpos;
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
if (win < 0 || win >= WINDOWS_NR)
return;
win_data = &ctx->win_data[win];
if (ctx->suspended) {
/* do not resume this window*/
win_data->resume = false;
return;
}
/* protect windows */
fimd_shadow_protect_win(ctx, win, true);
fimd_enable_video_output(ctx, win, false);
if (ctx->driver_data->has_shadowcon)
fimd_enable_shadow_channel_path(ctx, win, false);
/* unprotect windows */
fimd_shadow_protect_win(ctx, win, false);
win_data->enabled = false;
}
static void fimd_window_suspend(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct fimd_win_data *win_data;
int i;
for (i = 0; i < WINDOWS_NR; i++) {
win_data = &ctx->win_data[i];
win_data->resume = win_data->enabled;
if (win_data->enabled)
fimd_win_disable(mgr, i);
}
}
static void fimd_window_resume(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct fimd_win_data *win_data;
int i;
for (i = 0; i < WINDOWS_NR; i++) {
win_data = &ctx->win_data[i];
win_data->enabled = win_data->resume;
win_data->resume = false;
}
}
static void fimd_apply(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
struct fimd_win_data *win_data;
int i;
for (i = 0; i < WINDOWS_NR; i++) {
win_data = &ctx->win_data[i];
if (win_data->enabled)
fimd_win_commit(mgr, i);
else
fimd_win_disable(mgr, i);
}
fimd_commit(mgr);
}
static int fimd_poweron(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
int ret;
if (!ctx->suspended)
return 0;
ctx->suspended = false;
pm_runtime_get_sync(ctx->dev);
ret = clk_prepare_enable(ctx->bus_clk);
if (ret < 0) {
DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
goto bus_clk_err;
}
ret = clk_prepare_enable(ctx->lcd_clk);
if (ret < 0) {
DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
goto lcd_clk_err;
}
/* if vblank was enabled status, enable it again. */
if (test_and_clear_bit(0, &ctx->irq_flags)) {
ret = fimd_enable_vblank(mgr);
if (ret) {
DRM_ERROR("Failed to re-enable vblank [%d]\n", ret);
goto enable_vblank_err;
}
}
fimd_window_resume(mgr);
fimd_apply(mgr);
return 0;
enable_vblank_err:
clk_disable_unprepare(ctx->lcd_clk);
lcd_clk_err:
clk_disable_unprepare(ctx->bus_clk);
bus_clk_err:
ctx->suspended = true;
return ret;
}
static int fimd_poweroff(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
if (ctx->suspended)
return 0;
/*
* We need to make sure that all windows are disabled before we
* suspend that connector. Otherwise we might try to scan from
* a destroyed buffer later.
*/
fimd_window_suspend(mgr);
clk_disable_unprepare(ctx->lcd_clk);
clk_disable_unprepare(ctx->bus_clk);
pm_runtime_put_sync(ctx->dev);
ctx->suspended = true;
return 0;
}
static void fimd_dpms(struct exynos_drm_manager *mgr, int mode)
{
DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
switch (mode) {
case DRM_MODE_DPMS_ON:
fimd_poweron(mgr);
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_OFF:
fimd_poweroff(mgr);
break;
default:
DRM_DEBUG_KMS("unspecified mode %d\n", mode);
break;
}
}
static void fimd_trigger(struct device *dev)
{
struct fimd_context *ctx = dev_get_drvdata(dev);
struct fimd_driver_data *driver_data = ctx->driver_data;
void *timing_base = ctx->regs + driver_data->timing_base;
u32 reg;
/*
* Skips triggering if in triggering state, because multiple triggering
* requests can cause panel reset.
*/
if (atomic_read(&ctx->triggering))
return;
/* Enters triggering mode */
atomic_set(&ctx->triggering, 1);
reg = readl(timing_base + TRIGCON);
reg |= (TRGMODE_I80_RGB_ENABLE_I80 | SWTRGCMD_I80_RGB_ENABLE);
writel(reg, timing_base + TRIGCON);
/*
* Exits triggering mode if vblank is not enabled yet, because when the
* VIDINTCON0 register is not set, it can not exit from triggering mode.
*/
if (!test_bit(0, &ctx->irq_flags))
atomic_set(&ctx->triggering, 0);
}
static void fimd_te_handler(struct exynos_drm_manager *mgr)
{
struct fimd_context *ctx = mgr_to_fimd(mgr);
/* Checks the crtc is detached already from encoder */
if (ctx->pipe < 0 || !ctx->drm_dev)
return;
/*
* If there is a page flip request, triggers and handles the page flip
* event so that current fb can be updated into panel GRAM.
*/
if (atomic_add_unless(&ctx->win_updated, -1, 0))
fimd_trigger(ctx->dev);
/* Wakes up vsync event queue */
if (atomic_read(&ctx->wait_vsync_event)) {
atomic_set(&ctx->wait_vsync_event, 0);
wake_up(&ctx->wait_vsync_queue);
}
if (test_bit(0, &ctx->irq_flags))
drm_handle_vblank(ctx->drm_dev, ctx->pipe);
}
static struct exynos_drm_manager_ops fimd_manager_ops = {
.dpms = fimd_dpms,
.mode_fixup = fimd_mode_fixup,
.mode_set = fimd_mode_set,
.commit = fimd_commit,
.enable_vblank = fimd_enable_vblank,
.disable_vblank = fimd_disable_vblank,
.wait_for_vblank = fimd_wait_for_vblank,
.win_mode_set = fimd_win_mode_set,
.win_commit = fimd_win_commit,
.win_disable = fimd_win_disable,
.te_handler = fimd_te_handler,
};
static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
{
struct fimd_context *ctx = (struct fimd_context *)dev_id;
u32 val, clear_bit;
val = readl(ctx->regs + VIDINTCON1);
clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
if (val & clear_bit)
writel(clear_bit, ctx->regs + VIDINTCON1);
/* check the crtc is detached already from encoder */
if (ctx->pipe < 0 || !ctx->drm_dev)
goto out;
if (ctx->i80_if) {
exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
/* Exits triggering mode */
atomic_set(&ctx->triggering, 0);
} else {
drm_handle_vblank(ctx->drm_dev, ctx->pipe);
exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
/* set wait vsync event to zero and wake up queue. */
if (atomic_read(&ctx->wait_vsync_event)) {
atomic_set(&ctx->wait_vsync_event, 0);
wake_up(&ctx->wait_vsync_queue);
}
}
out:
return IRQ_HANDLED;
}
static int fimd_bind(struct device *dev, struct device *master, void *data)
{
struct fimd_context *ctx = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
fimd_mgr_initialize(&ctx->manager, drm_dev);
exynos_drm_crtc_create(&ctx->manager);
if (ctx->display)
exynos_drm_create_enc_conn(drm_dev, ctx->display);
return 0;
}
static void fimd_unbind(struct device *dev, struct device *master,
void *data)
{
struct fimd_context *ctx = dev_get_drvdata(dev);
fimd_dpms(&ctx->manager, DRM_MODE_DPMS_OFF);
if (ctx->display)
exynos_dpi_remove(ctx->display);
fimd_mgr_remove(&ctx->manager);
}
static const struct component_ops fimd_component_ops = {
.bind = fimd_bind,
.unbind = fimd_unbind,
};
static int fimd_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fimd_context *ctx;
struct device_node *i80_if_timings;
struct resource *res;
int ret = -EINVAL;
if (!dev->of_node)
return -ENODEV;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->manager.type = EXYNOS_DISPLAY_TYPE_LCD;
ctx->manager.ops = &fimd_manager_ops;
ret = exynos_drm_component_add(dev, EXYNOS_DEVICE_TYPE_CRTC,
ctx->manager.type);
if (ret)
return ret;
ctx->dev = dev;
ctx->suspended = true;
ctx->driver_data = drm_fimd_get_driver_data(pdev);
if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
ctx->vidcon1 |= VIDCON1_INV_VDEN;
if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
ctx->vidcon1 |= VIDCON1_INV_VCLK;
i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
if (i80_if_timings) {
u32 val;
ctx->i80_if = true;
if (ctx->driver_data->has_vidoutcon)
ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
else
ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
/*
* The user manual describes that this "DSI_EN" bit is required
* to enable I80 24-bit data interface.
*/
ctx->vidcon0 |= VIDCON0_DSI_EN;
if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
val = 0;
ctx->i80ifcon = LCD_CS_SETUP(val);
if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
val = 0;
ctx->i80ifcon |= LCD_WR_SETUP(val);
if (of_property_read_u32(i80_if_timings, "wr-active", &val))
val = 1;
ctx->i80ifcon |= LCD_WR_ACTIVE(val);
if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
val = 0;
ctx->i80ifcon |= LCD_WR_HOLD(val);
}
of_node_put(i80_if_timings);
ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
"samsung,sysreg");
if (IS_ERR(ctx->sysreg)) {
dev_warn(dev, "failed to get system register.\n");
ctx->sysreg = NULL;
}
ctx->bus_clk = devm_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_del_component;
}
ctx->lcd_clk = devm_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_del_component;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ctx->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(ctx->regs)) {
ret = PTR_ERR(ctx->regs);
goto err_del_component;
}
res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
ctx->i80_if ? "lcd_sys" : "vsync");
if (!res) {
dev_err(dev, "irq request failed.\n");
ret = -ENXIO;
goto err_del_component;
}
ret = devm_request_irq(dev, res->start, fimd_irq_handler,
0, "drm_fimd", ctx);
if (ret) {
dev_err(dev, "irq request failed.\n");
goto err_del_component;
}
init_waitqueue_head(&ctx->wait_vsync_queue);
atomic_set(&ctx->wait_vsync_event, 0);
platform_set_drvdata(pdev, ctx);
ctx->display = exynos_dpi_probe(dev);
if (IS_ERR(ctx->display)) {
ret = PTR_ERR(ctx->display);
goto err_del_component;
}
pm_runtime_enable(dev);
ret = component_add(dev, &fimd_component_ops);
if (ret)
goto err_disable_pm_runtime;
return ret;
err_disable_pm_runtime:
pm_runtime_disable(dev);
err_del_component:
exynos_drm_component_del(dev, EXYNOS_DEVICE_TYPE_CRTC);
return ret;
}
static int fimd_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
component_del(&pdev->dev, &fimd_component_ops);
exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
return 0;
}
struct platform_driver fimd_driver = {
.probe = fimd_probe,
.remove = fimd_remove,
.driver = {
.name = "exynos4-fb",
.owner = THIS_MODULE,
.of_match_table = fimd_driver_dt_match,
},
};
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