Thanks for contribution.
It seems reasonable that you separate device drivers into FIMD and DECON
because many registers of them have many different offsets and fields.
However, there may be a good solution that we can combine common sets of
these drivers later.
Below are my comments.
Thanks,
Inki Dae
On 2014년 10월 10일 21:48, Ajay Kumar wrote:
> This series is based on exynos-drm-next branch of Inki Dae's tree at:
> git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git
>
> DECON(Display and Enhancement Controller) is the new IP
> in exynos7 SOC for generating video signals using pixel data.
DECON was used since Exynos5430. And is Exynos5433 different from
Exynos7? If so, could I get the Exynos7 user manual (TRM) for review?
>
> DECON driver can be used to drive 2 different interfaces on Exynos7:
> DECON-INT(video controller) and DECON-EXT(Mixer for HDMI)
>
> The existing FIMD driver code was used as a template to create
> DECON driver. Only DECON-INT is supported as of now, and
> DECON-EXT support will be added later.
>
> Signed-off-by: Akshu Agrawal <akshu.a@xxxxxxxxxxx>
> Signed-off-by: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/video/exynos-decon.txt | 68 ++
> drivers/gpu/drm/exynos/Kconfig | 11 +-
> drivers/gpu/drm/exynos/Makefile | 1 +
> drivers/gpu/drm/exynos/exynos_drm_decon.c | 1086
++++++++++++++++++++
> drivers/gpu/drm/exynos/exynos_drm_drv.c | 17 +-
> drivers/gpu/drm/exynos/exynos_drm_drv.h | 11 +
> include/video/samsung_decon.h | 346 +++++++
> 7 files changed, 1537 insertions(+), 3 deletions(-)
> create mode 100644
Documentation/devicetree/bindings/video/exynos-decon.txt
> create mode 100644 drivers/gpu/drm/exynos/exynos_drm_decon.c
> create mode 100644 include/video/samsung_decon.h
>
> diff --git a/Documentation/devicetree/bindings/video/exynos-decon.txt
b/Documentation/devicetree/bindings/video/exynos-decon.txt
> new file mode 100644
> index 0000000..e865650
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/exynos-decon.txt
> @@ -0,0 +1,68 @@
> +Device-Tree bindings for Samsung Exynos7 SoC display controller (DECON)
> +
> +DECON (Display and Enhancement Controller) is the Display Controller
for the
> +Exynos7 series of SoCs which transfers the image data from a video memory
> +buffer to an external LCD interface.
> +
> +Required properties:
> +- compatible: value should be "samsung,exynos7-decon";
If exynos5433 was just renamed to exynos7 then, it should be one of the
following:
(a) "samsung,exynos5430-decon" for Display and enhancement controller
IP for Exynos5430
(b) "samsung,exynos7" for Display and enhancement controller IP for Exynos7
Or,
(a) "samsung,exynos5430-decon" for Display and enhancement controller
IP for Exynos5430
(b) "samsung,exynos5433-decon" for Display and enhancement controller
IP for Exynos5433
(c) "samsung,exynos7" for Display and enhancement controller IP for Exynos7
> +
> +- reg: physical base address and length of the DECON registers set.
> +
> +- interrupt-parent: should be the phandle of the decon controller's
> + parent interrupt controller.
> +
> +- interrupts: should contain a list of all DECON IP block interrupts
in the
> + order: FIFO Level, VSYNC, LCD_SYSTEM. The interrupt specifier
> + format depends on the interrupt controller used.
> +
> +- interrupt-names: should contain the interrupt names: "fifo", "vsync",
> + "lcd_sys", in the same order as they were listed in the interrupts
> + property.
> +
> +- pinctrl-0: pin control group to be used for this controller.
> +
> +- pinctrl-names: must contain a "default" entry.
> +
> +- clocks: must include clock specifiers corresponding to entries in the
> + clock-names property.
> +
> +- clock-names: list of clock names sorted in the same order as the clocks
> + property. Must contain "pclk_decon0", "aclk_decon0",
> + "decon0_eclk", "decon0_vclk", "sclk_dsd", aclk_lh_disp0",
> + "aclk_disp", "aclk_lh_disp1".
Should DECON driver really control above all clocks? I think it's enough
that DECON driver controls only lcd and bus clocks, and others could be
configured by boot-loader or by calling clk_set_rate.
> +
> +Optional Properties:
> +- samsung,power-domain: a phandle to DECON power domain node.
You are missing many properties,
samsung,invert-vden
samsung,invert-vclk
display-timings
...
refer to below document,
Documentation/devicetree/bindings/video/samsung-fimd.txt
> +
> +Example:
> +
> +SoC specific DT entry:
> +
> + decon@13930000 {
> + compatible = "samsung,exynos7-decon";
> + interrupt-parent = <&combiner>;
> + reg = <0x13930000 0x1000>;
> + interrupt-names = "lcd_sys", "vsync", "fifo";
> + interrupts = <0 188 0>, <0 189 0>, <0 190 0>;
> + clocks = <&clock_disp PCLK_DECON_INT>,
> + <&clock_disp ACLK_DECON_INT>,
> + <&clock_disp SCLK_DECON_INT_ECLK>,
> + <&clock_disp SCLK_DECON_INT_EXTCLKPLL>,
> + <&clock_disp SCLK_DSD>,
> + <&clock_bus0 ACLK_LH_DISP0>,
> + <&clock_disp ACLK_CP_DISP>,
> + <&clock_bus0 ACLK_LH_DISP1>;
> + clock-names = "pclk_decon0", "aclk_decon0", "decon0_eclk",
> + "decon0_vclk", "sclk_dsd", "aclk_lh_disp0",
> + "aclk_disp", "aclk_lh_disp1";
> + status = "disabled";
> + };
> +
> +Board specific DT entry:
> +
> + decon@13930000 {
> + pinctrl-0 = <&lcd_clk &pwm1_out>;
> + pinctrl-names = "default";
> + status = "okay";
> + };
> diff --git a/drivers/gpu/drm/exynos/Kconfig
b/drivers/gpu/drm/exynos/Kconfig
> index fd1c070..89275ea 100644
> --- a/drivers/gpu/drm/exynos/Kconfig
> +++ b/drivers/gpu/drm/exynos/Kconfig
> @@ -31,6 +31,13 @@ config DRM_EXYNOS_FIMD
> help
> Choose this option if you want to use Exynos FIMD for DRM.
>
> +config DRM_EXYNOS_DECON
> + bool "Exynos DRM DECON"
> + depends on DRM_EXYNOS
> + select FB_MODE_HELPERS
> + help
> + Choose this option if you want to use Exynos DECON for DRM.
> +
> config DRM_EXYNOS_DPI
> bool "EXYNOS DRM parallel output support"
> depends on DRM_EXYNOS_FIMD
> @@ -41,7 +48,7 @@ config DRM_EXYNOS_DPI
>
> config DRM_EXYNOS_DSI
> bool "EXYNOS DRM MIPI-DSI driver support"
> - depends on DRM_EXYNOS_FIMD
> + depends on (DRM_EXYNOS_FIMD || DRM_EXYNOS_DECON)
> select DRM_MIPI_DSI
> select DRM_PANEL
> default n
> @@ -50,7 +57,7 @@ config DRM_EXYNOS_DSI
>
> config DRM_EXYNOS_DP
> bool "EXYNOS DRM DP driver support"
> - depends on DRM_EXYNOS_FIMD && ARCH_EXYNOS && (DRM_PTN3460=n ||
DRM_PTN3460=y || DRM_PTN3460=DRM_EXYNOS)
> + depends on (DRM_EXYNOS_FIMD || DRM_EXYNOS_DECON) && ARCH_EXYNOS &&
(DRM_PTN3460=n || DRM_PTN3460=y || DRM_PTN3460=DRM_EXYNOS)
> default DRM_EXYNOS
> select DRM_PANEL
> help
> diff --git a/drivers/gpu/drm/exynos/Makefile
b/drivers/gpu/drm/exynos/Makefile
> index 33ae365..c3282ac 100644
> --- a/drivers/gpu/drm/exynos/Makefile
> +++ b/drivers/gpu/drm/exynos/Makefile
> @@ -11,6 +11,7 @@ exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o \
> exynosdrm-$(CONFIG_DRM_EXYNOS_IOMMU) += exynos_drm_iommu.o
> exynosdrm-$(CONFIG_DRM_EXYNOS_DMABUF) += exynos_drm_dmabuf.o
> exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o
> +exynosdrm-$(CONFIG_DRM_EXYNOS_DECON) += exynos_drm_decon.o
> exynosdrm-$(CONFIG_DRM_EXYNOS_DPI) += exynos_drm_dpi.o
> exynosdrm-$(CONFIG_DRM_EXYNOS_DSI) += exynos_drm_dsi.o
> exynosdrm-$(CONFIG_DRM_EXYNOS_DP) += exynos_dp_core.o exynos_dp_reg.o
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_decon.c
b/drivers/gpu/drm/exynos/exynos_drm_decon.c
> new file mode 100644
> index 0000000..5ac4557
> --- /dev/null
> +++ b/drivers/gpu/drm/exynos/exynos_drm_decon.c
> @@ -0,0 +1,1086 @@
> +/* exynos_drm_decon.c
> + *
> + * Copyright (C) 2014 Samsung Electronics Co.Ltd
> + * Authors:
> + * Akshu Agarwal <akshu.a@xxxxxxxxxxx>
> + * Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
> + *
> + * 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 <drm/exynos_drm.h>
> +
> +#include <linux/clk.h>
> +#include <linux/component.h>
> +#include <linux/kernel.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +
> +#include <video/of_display_timing.h>
> +#include <video/of_videomode.h>
> +#include <video/samsung_decon.h>
> +
> +#include "exynos_drm_crtc.h"
> +#include "exynos_drm_drv.h"
> +#include "exynos_drm_fbdev.h"
> +#include "exynos_drm_iommu.h"
> +
> +/*
> + * DECON stands for Display and Enhancement controller, 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 DECON_DEFAULT_FRAMERATE 60
> +#define RESET_TIMEOUT 200
> +#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
> +
> +#define WINDOWS_NR 2
I know that DECON supports five overlays.
> +
> +#define get_decon_manager(mgr)
platform_get_drvdata(to_platform_device(dev))
> +
> +struct decon_win_data {
> + unsigned int ovl_x;
> + unsigned int ovl_y;
> + 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;
> + bool enabled;
> + bool resume;
> +};
> +
> +struct decon_context {
> + struct device *dev;
> + struct drm_device *drm_dev;
> + struct clk *pclk;
> + struct clk *aclk;
> + struct clk *eclk;
> + struct clk *vclk;
> + struct clk *dsd;
> + struct clk *lh_disp1;
> + struct clk *aclk_disp;
> + struct clk *lh_disp0;
> + void __iomem *regs;
> + struct drm_display_mode mode;
> + struct decon_win_data win_data[WINDOWS_NR];
> + unsigned int default_win;
> + unsigned long irq_flags;
> + u32 vidcon1;
> + bool suspended;
> + int pipe;
> + wait_queue_head_t wait_vsync_queue;
> + atomic_t wait_vsync_event;
> +
> + struct exynos_drm_panel_info panel;
> +};
> +
> +static const struct of_device_id decon_driver_dt_match[] = {
> + { .compatible = "samsung,exynos7-decon"},
WARNING: DT compatible string "samsung,exynos7-decon" appears
un-documented -- check ./Documentation/devicetree/bindings/
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
> +
> +static void decon_wait_for_vblank(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> +
> + if (ctx->suspended)
> + return;
> +
> + atomic_set(&ctx->wait_vsync_event, 1);
> +
> + /*
> + * wait for decon 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 decon_clear_channel(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + 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) {
> + val &= ~WINCONx_ENWIN;
> + writel(val, ctx->regs + WINCON(win));
> + 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;
> + decon_wait_for_vblank(mgr);
> + ctx->suspended = state;
> + }
> +}
> +
> +static int decon_mgr_initialize(struct exynos_drm_manager *mgr,
> + struct drm_device *drm_dev)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct exynos_drm_private *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.
> + */
> + decon_clear_channel(mgr);
> + drm_iommu_attach_device(ctx->drm_dev, ctx->dev);
> + }
> +
> + return 0;
> +}
> +
> +static void decon_mgr_remove(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> +
> + /* 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 decon_calc_clkdiv(struct decon_context *ctx,
> + const struct drm_display_mode *mode)
> +{
> + unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
> + u32 clkdiv;
> +
> + /* Find the clock divider value that gets us closest to ideal_clk */
> + clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
> +
> + return (clkdiv < 0x100) ? clkdiv : 0xff;
> +}
> +
> +static bool decon_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 = DECON_DEFAULT_FRAMERATE;
> +
> + return true;
> +}
> +
> +static void decon_mode_set(struct exynos_drm_manager *mgr,
> + const struct drm_display_mode *in_mode)
> +{
> + struct decon_context *ctx = mgr->ctx;
> +
> + drm_mode_copy(&ctx->mode, in_mode);
> +}
> +
> +static void decon_commit(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct drm_display_mode *mode = &ctx->mode;
> + u32 val, clkdiv;
> + int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
> +
> + if (ctx->suspended)
> + return;
> +
> + /* nothing to do if we haven't set the mode yet */
> + if (mode->htotal == 0 || mode->vtotal == 0)
> + return;
> +
> + /* 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);
> + writel(val, ctx->regs + VIDTCON0);
Check VIDTCON0~3 registers. These registers of Exynos5433 and Exynos5430
have different offsets so you would need to consider the differences.
> +
> + val = VIDTCON1_VSPW(vsync_len - 1);
> + writel(val, ctx->regs + VIDTCON1);
Ditto
> +
> + /* 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;
> +
> + /* setup horizontal timing values. */
> + val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
> + writel(val, ctx->regs + VIDTCON2);
Ditto
> +
> + val = VIDTCON3_HSPW(hsync_len - 1);
> + writel(val, ctx->regs + VIDTCON3);
Ditto
> +
> + /* setup horizontal and vertical display size. */
> + val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
> + VIDTCON4_HOZVAL(mode->hdisplay - 1);
> + writel(val, ctx->regs + VIDTCON4);
> +
> + writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
> +
> + /*
> + * 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);
> +
> + clkdiv = decon_calc_clkdiv(ctx, mode);
> + if (clkdiv > 1) {
> + val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
> + writel(val, ctx->regs + VCLKCON1);
> + writel(val, ctx->regs + VCLKCON2);
> + }
> +
> + val = readl(ctx->regs + DECON_UPDATE);
> + val |= DECON_UPDATE_STANDALONE_F;
> + writel(val, ctx->regs + DECON_UPDATE);
> +}
> +
> +static int decon_enable_vblank(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + 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;
> + val |= VIDINTCON0_INT_FRAME;
> +
> + val &= ~VIDINTCON0_FRAMESEL0_MASK;
> + val |= VIDINTCON0_FRAMESEL0_VSYNC;
> +
> + writel(val, ctx->regs + VIDINTCON0);
> + }
> +
> + return 0;
> +}
> +
> +static void decon_disable_vblank(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + u32 val;
> +
> + 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 void decon_win_mode_set(struct exynos_drm_manager *mgr,
> + struct exynos_drm_overlay *overlay)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct decon_win_data *win_data;
> + int win, padding;
> +
> + 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;
> +
> +
> + win_data = &ctx->win_data[win];
> +
> + padding = (overlay->pitch / (overlay->bpp >> 3)) - overlay->fb_width;
> + win_data->offset_x = overlay->fb_x;
> + win_data->offset_y = overlay->fb_y;
> + win_data->fb_width = overlay->fb_width + padding;
> + win_data->fb_height = overlay->fb_height;
> + win_data->ovl_x = overlay->crtc_x;
> + win_data->ovl_y = overlay->crtc_y;
> + win_data->ovl_width = overlay->crtc_width;
> + win_data->ovl_height = overlay->crtc_height;
> + win_data->dma_addr = overlay->dma_addr[0];
> + win_data->bpp = overlay->bpp;
> + win_data->pixel_format = overlay->pixel_format;
> +
> + 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 decon_win_set_pixfmt(struct decon_context *ctx, unsigned
int win)
> +{
> + struct decon_win_data *win_data = &ctx->win_data[win];
> + unsigned long val;
> +
> + val = readl(ctx->regs + WINCON(win));
> + val &= ~WINCONx_BPPMODE_MASK;
> +
> + switch (win_data->pixel_format) {
> + case DRM_FORMAT_RGB565:
> + val |= WINCONx_BPPMODE_16BPP_565;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_XRGB8888:
> + val |= WINCONx_BPPMODE_24BPP_xRGB;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_XBGR8888:
> + val |= WINCONx_BPPMODE_24BPP_xBGR;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_RGBX8888:
> + val |= WINCONx_BPPMODE_24BPP_RGBx;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_BGRX8888:
> + val |= WINCONx_BPPMODE_24BPP_BGRx;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_ARGB8888:
> + val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
> + WINCONx_ALPHA_SEL;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_ABGR8888:
> + val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
> + WINCONx_ALPHA_SEL;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_RGBA8888:
> + val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
> + WINCONx_ALPHA_SEL;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + case DRM_FORMAT_BGRA8888:
> + val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
> + WINCONx_ALPHA_SEL;
> + val |= WINCONx_BURSTLEN_16WORD;
> + break;
> + default:
> + DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
> +
> + val |= WINCONx_BPPMODE_24BPP_xRGB;
> + 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
WARNING: 'alot' may be misspelled - perhaps 'a lot'?
> + * 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_8WORD;
> + }
> +
> + writel(val, ctx->regs + WINCON(win));
> +}
> +
> +static void decon_win_set_colkey(struct decon_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 decon_shadow_protect_win(struct decon_context *ctx,
> + int win, bool protect)
> +{
> + u32 reg, bits, val;
> +
> + reg = SHADOWCON;
> + bits = SHADOWCON_WINx_PROTECT(win);
> +
> + val = readl(ctx->regs + reg);
> + if (protect)
> + val |= bits;
> + else
> + val &= ~bits;
> + writel(val, ctx->regs + reg);
> +}
> +
> +static void decon_win_commit(struct exynos_drm_manager *mgr, int zpos)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct decon_win_data *win_data;
> + int win = zpos;
> + unsigned long val, alpha, blendeq;
> + 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 decon 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 */
> + decon_shadow_protect_win(ctx, win, true);
> +
> + /* buffer start address */
> + val = (unsigned long)win_data->dma_addr;
> + writel(val, ctx->regs + VIDW_BUF_START(win));
> +
> + /* buffer size */
> + writel(win_data->fb_width, ctx->regs + VIDW_WHOLE_X(win));
> + writel(win_data->fb_height, ctx->regs + VIDW_WHOLE_Y(win));
> +
> + /* offset from the start of the buffer read */
> + writel(win_data->offset_x, ctx->regs + VIDW_OFFSET_X(win));
> + writel(win_data->offset_y, ctx->regs + VIDW_OFFSET_Y(win));
> +
> + DRM_DEBUG_KMS("start addr = 0x%lx\n",
> + (unsigned long)win_data->dma_addr);
> + DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
> + win_data->ovl_width, win_data->ovl_height);
> +
> + /* OSD position */
> + val = VIDOSDxA_TOPLEFT_X(win_data->ovl_x) |
> + VIDOSDxA_TOPLEFT_Y(win_data->ovl_y);
> + writel(val, ctx->regs + VIDOSD_A(win));
> +
> + last_x = win_data->ovl_x + win_data->ovl_width;
> + if (last_x)
> + last_x--;
> + last_y = win_data->ovl_y + win_data->ovl_height;
> + if (last_y)
> + last_y--;
> +
> + val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(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->ovl_x, win_data->ovl_y, last_x, last_y);
> +
> + /* OSD alpha */
> + alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
> + VIDOSDxC_ALPHA0_G_F(0x0) |
> + VIDOSDxC_ALPHA0_B_F(0x0);
> +
> + writel(alpha, ctx->regs + VIDOSD_C(win));
> +
> + alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
> + VIDOSDxD_ALPHA1_G_F(0xff) |
> + VIDOSDxD_ALPHA1_B_F(0xff);
> +
> + writel(alpha, ctx->regs + VIDOSD_D(win));
> +
> + if (win != 0) {
> + blendeq = BLENDE_A_FUNC(BLENDE_COEF_ONE) |
> + BLENDE_B_FUNC(BLENDE_COEF_ZERO) |
> + BLENDE_P_FUNC(BLENDE_COEF_ZERO) |
> + BLENDE_Q_FUNC(BLENDE_COEF_ZERO);
> +
> + writel(blendeq, ctx->regs + BLENDE(win - 1));
> + }
> +
> + decon_win_set_pixfmt(ctx, win);
> +
> + /* hardware window 0 doesn't support color key. */
> + if (win != 0)
> + decon_win_set_colkey(ctx, win);
> +
> + /* wincon */
> + val = readl(ctx->regs + WINCON(win));
> + val |= WINCONx_TRIPLE_BUF_MODE;
> + val |= WINCONx_ENWIN;
> + writel(val, ctx->regs + WINCON(win));
> +
> + /* Enable DMA channel and unprotect windows */
> + decon_shadow_protect_win(ctx, win, false);
> +
> + val = readl(ctx->regs + DECON_UPDATE);
> + val |= DECON_UPDATE_STANDALONE_F;
> + writel(val, ctx->regs + DECON_UPDATE);
> +
> + win_data->enabled = true;
> +}
> +
> +static void decon_win_disable(struct exynos_drm_manager *mgr, int zpos)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct decon_win_data *win_data;
> + int win = zpos;
> + u32 val;
> +
> + 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 */
> + decon_shadow_protect_win(ctx, win, true);
> +
> + /* wincon */
> + val = readl(ctx->regs + WINCON(win));
> + val &= ~WINCONx_ENWIN;
> + writel(val, ctx->regs + WINCON(win));
> +
> + decon_shadow_protect_win(ctx, win, false);
> +
> + win_data->enabled = false;
> +}
> +
> +static void decon_window_suspend(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct decon_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)
> + decon_win_disable(mgr, i);
> + }
> + decon_wait_for_vblank(mgr);
> +}
> +
> +static void decon_window_resume(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct decon_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 decon_apply(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + struct decon_win_data *win_data;
> + int i;
> +
> + for (i = 0; i < WINDOWS_NR; i++) {
> + win_data = &ctx->win_data[i];
> + if (win_data->enabled)
> + decon_win_commit(mgr, i);
> + else
> + decon_win_disable(mgr, i);
> + }
> +
> + decon_commit(mgr);
> +}
> +
> +static int decon_reg_reset(struct decon_context *ctx)
> +{
> + int tries = RESET_TIMEOUT;
> +
> + writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
> +
> + while (tries) {
> + if (!(readl(ctx->regs + VIDCON0) & VIDCON0_SWRESET))
> + break;
> + udelay(10);
> + tries--;
> + }
> +
> + if (!tries) {
> + DRM_ERROR("Failed to reset decon\n");
> + return -EBUSY;
> + }
> +
> + return 0;
> +}
> +
> +static void decon_cmu_enable(struct decon_context *ctx)
> +{
> + writel(~DECON_CMU_ALL_CLKGATE_ENABLE, ctx->regs + DECON_CMU);
> +}
> +
> +static void decon_blend_alpha_bits(struct decon_context *ctx)
> +{
> + writel(BLENDCON_NEW_8BIT_ALPHA_VALUE, ctx->regs + BLENDCON);
> +}
> +
> +static void decon_set_vidout(struct decon_context *ctx)
> +{
> + writel(VIDOUTCON0_LCD_ON | VIDOUTCON0_RGBIF, ctx->regs + VIDOUTCON0);
> +}
> +
> +static void decon_set_crc(struct decon_context *ctx)
> +{
> + u32 val = readl(ctx->regs + CRCCTRL);
> +
> + writel(val & ~(CRCCTRL_CRCCLKEN | CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F),
> + ctx->regs + CRCCTRL);
> +}
> +
> +static void decon_set_clkval(struct decon_context *ctx)
> +{
> + writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
> +}
> +
> +static void decon_set_fixvclk(struct decon_context *ctx)
> +{
> + writel(ctx->vidcon1, ctx->regs + VIDCON1(0));
> +}
> +
> +static int decon_poweron(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> + int ret;
> +
> + if (!ctx->suspended)
> + return 0;
> +
> + ctx->suspended = false;
> +
> + pm_runtime_get_sync(ctx->dev);
> +
> + ret = clk_prepare_enable(ctx->pclk);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret);
> + goto pclk_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->aclk);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret);
> + goto aclk_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->eclk);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret);
> + goto eclk_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->vclk);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret);
> + goto vclk_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->dsd);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the dsd [%d]\n", ret);
> + goto dsd_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->lh_disp1);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the lh_disp1 [%d]\n", ret);
> + goto lh_disp1_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->aclk_disp);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the aclk_disp [%d]\n", ret);
> + goto aclk_disp_err;
> + }
> +
> + ret = clk_prepare_enable(ctx->lh_disp0);
> + if (ret < 0) {
> + DRM_ERROR("Failed to prepare_enable the lh_disp0 [%d]\n", ret);
> + goto lh_disp0_err;
> + }
> +
> + ret = decon_reg_reset(mgr->ctx);
> + if (ret < 0) {
> + DRM_ERROR("Failed to reset decon [%d]\n", ret);
> + goto lh_disp0_err;
> + }
> +
> + decon_cmu_enable(mgr->ctx);
> + decon_blend_alpha_bits(mgr->ctx);
> + decon_set_vidout(mgr->ctx);
> + decon_set_crc(mgr->ctx);
> + decon_set_fixvclk(mgr->ctx);
> + decon_set_clkval(mgr->ctx);
> +
> + /* if vblank was enabled status, enable it again. */
> + if (test_and_clear_bit(0, &ctx->irq_flags)) {
> + ret = decon_enable_vblank(mgr);
> + if (ret) {
> + DRM_ERROR("Failed to re-enable vblank [%d]\n", ret);
> + goto enable_vblank_err;
> + }
> + }
> +
> + decon_window_resume(mgr);
> +
> + decon_apply(mgr);
> +
> + return 0;
> +
> +enable_vblank_err:
> + clk_disable_unprepare(ctx->lh_disp0);
> +lh_disp0_err:
> + clk_disable_unprepare(ctx->aclk_disp);
> +aclk_disp_err:
> + clk_disable_unprepare(ctx->lh_disp1);
> +lh_disp1_err:
> + clk_disable_unprepare(ctx->dsd);
> +dsd_err:
> + clk_disable_unprepare(ctx->vclk);
> +vclk_err:
> + clk_disable_unprepare(ctx->eclk);
> +eclk_err:
> + clk_disable_unprepare(ctx->aclk);
> +aclk_err:
> + clk_disable_unprepare(ctx->pclk);
> +pclk_err:
> + ctx->suspended = true;
> + return ret;
> +}
> +
> +static int decon_poweroff(struct exynos_drm_manager *mgr)
> +{
> + struct decon_context *ctx = mgr->ctx;
> +
> + 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.
> + */
> + decon_window_suspend(mgr);
> +
> + clk_disable_unprepare(ctx->pclk);
> + clk_disable_unprepare(ctx->aclk);
> + clk_disable_unprepare(ctx->eclk);
> + clk_disable_unprepare(ctx->vclk);
> + clk_disable_unprepare(ctx->dsd);
> + clk_disable_unprepare(ctx->lh_disp1);
> + clk_disable_unprepare(ctx->aclk_disp);
> + clk_disable_unprepare(ctx->lh_disp0);
> +
> + pm_runtime_put_sync(ctx->dev);
> +
> + ctx->suspended = true;
> + return 0;
> +}
> +
> +static void decon_dpms(struct exynos_drm_manager *mgr, int mode)
> +{
> + DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
> +
> + switch (mode) {
> + case DRM_MODE_DPMS_ON:
> + decon_poweron(mgr);
> + break;
> + case DRM_MODE_DPMS_STANDBY:
> + case DRM_MODE_DPMS_SUSPEND:
> + case DRM_MODE_DPMS_OFF:
> + decon_poweroff(mgr);
> + break;
> + default:
> + DRM_DEBUG_KMS("unspecified mode %d\n", mode);
> + break;
> + }
> +}
> +
> +static struct exynos_drm_manager_ops decon_manager_ops = {
> + .dpms = decon_dpms,
> + .mode_fixup = decon_mode_fixup,
> + .mode_set = decon_mode_set,
> + .commit = decon_commit,
> + .enable_vblank = decon_enable_vblank,
> + .disable_vblank = decon_disable_vblank,
> + .wait_for_vblank = decon_wait_for_vblank,
> + .win_mode_set = decon_win_mode_set,
> + .win_commit = decon_win_commit,
> + .win_disable = decon_win_disable,
> +};
> +
> +static struct exynos_drm_manager decon_manager = {
> + .type = EXYNOS_DISPLAY_TYPE_LCD,
> + .ops = &decon_manager_ops,
> +};
> +
> +static irqreturn_t decon_irq_handler(int irq, void *dev_id)
> +{
> + struct decon_context *ctx = (struct decon_context *)dev_id;
> + 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 (ctx->pipe < 0 || !ctx->drm_dev)
> + goto out;
> +
> + 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 decon_bind(struct device *dev, struct device *master, void
*data)
> +{
> + struct drm_device *drm_dev = data;
> +
> + decon_mgr_initialize(&decon_manager, drm_dev);
> + exynos_drm_crtc_create(&decon_manager);
> +
> + return 0;
> +
> +}
> +
> +static void decon_unbind(struct device *dev, struct device *master,
> + void *data)
> +{
> + struct exynos_drm_manager *mgr = dev_get_drvdata(dev);
> +
> + decon_dpms(mgr, DRM_MODE_DPMS_OFF);
> + decon_mgr_remove(mgr);
> +}
> +
> +static const struct component_ops decon_component_ops = {
> + .bind = decon_bind,
> + .unbind = decon_unbind,
> +};
> +
> +static int decon_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct decon_context *ctx;
> + struct resource *res;
> + int ret = -EINVAL;
> +
> + ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC,
> + decon_manager.type);
> + if (ret)
> + return ret;
> +
> + if (!dev->of_node) {
> + ret = -ENODEV;
> + goto err_del_component;
> + }
> +
> + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> + if (!ctx) {
> + ret = -ENOMEM;
> + goto err_del_component;
> + }
> +
> + ctx->dev = dev;
> + ctx->suspended = true;
> +
You would also need to consider to configure DSD_CFG_MUX register using
mfd/syscon interfaces.
> + ctx->pclk = devm_clk_get(dev, "pclk_decon0");
> + if (IS_ERR(ctx->pclk)) {
> + dev_err(dev, "failed to get bus clock\n");
> + ret = PTR_ERR(ctx->pclk);
> + goto err_del_component;
> + }
> +
> + ctx->aclk = devm_clk_get(dev, "aclk_decon0");
> + if (IS_ERR(ctx->aclk)) {
> + dev_err(dev, "failed to get aclock\n");
> + ret = PTR_ERR(ctx->aclk);
> + goto err_del_component;
> + }
> +
> + ctx->eclk = devm_clk_get(dev, "decon0_eclk");
> + if (IS_ERR(ctx->eclk)) {
> + dev_err(dev, "failed to get eclock\n");
> + ret = PTR_ERR(ctx->eclk);
> + goto err_del_component;
> + }
> +
> + ctx->vclk = devm_clk_get(dev, "decon0_vclk");
> + if (IS_ERR(ctx->vclk)) {
> + dev_err(dev, "failed to get vclock\n");
> + ret = PTR_ERR(ctx->vclk);
> + goto err_del_component;
> + }
> +
> + ctx->dsd = devm_clk_get(dev, "sclk_dsd");
> + if (IS_ERR(ctx->dsd)) {
> + dev_err(dev, "failed to get dsd clock\n");
> + ret = PTR_ERR(ctx->dsd);
> + goto err_del_component;
> + }
> +
> + ctx->lh_disp1 = devm_clk_get(dev, "aclk_lh_disp1");
> + if (IS_ERR(ctx->lh_disp1)) {
> + dev_err(dev, "failed to get lh_disp1 clock\n");
> + ret = PTR_ERR(ctx->lh_disp1);
> + goto err_del_component;
> + }
> +
> + ctx->aclk_disp = devm_clk_get(dev, "aclk_disp");
> + if (IS_ERR(ctx->aclk_disp)) {
> + dev_err(dev, "failed to get aclk_disp clock\n");
> + ret = PTR_ERR(ctx->aclk_disp);
> + goto err_del_component;
> + }
> +
> + ctx->lh_disp0 = devm_clk_get(dev, "aclk_lh_disp0");
> + if (IS_ERR(ctx->lh_disp0)) {
> + dev_err(dev, "failed to get lh_disp0 clock\n");
> + ret = PTR_ERR(ctx->lh_disp0);
> + 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, "vsync");
> + if (!res) {
> + dev_err(dev, "irq request failed.\n");
> + ret = -ENXIO;
> + goto err_del_component;
> + }
> +
> + ret = devm_request_irq(dev, res->start, decon_irq_handler,
> + 0, "drm_decon", 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, &decon_manager);
> +
> + decon_manager.ctx = ctx;
> +
> + pm_runtime_enable(&pdev->dev);
> +
> + ret = component_add(&pdev->dev, &decon_component_ops);
> + if (ret)
> + goto err_disable_pm_runtime;
> +
> + return ret;
> +
> +err_disable_pm_runtime:
> + pm_runtime_disable(&pdev->dev);
> +
> +err_del_component:
> + exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
> + return ret;
> +}
> +
> +static int decon_remove(struct platform_device *pdev)
> +{
> + pm_runtime_disable(&pdev->dev);
> +
> + component_del(&pdev->dev, &decon_component_ops);
> + exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
> +
> + return 0;
> +}
> +
> +struct platform_driver decon_driver = {
> + .probe = decon_probe,
> + .remove = decon_remove,
> + .driver = {
> + .name = "exynos-decon",
> + .owner = THIS_MODULE,
> + .of_match_table = decon_driver_dt_match,
> + },
> +};
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c
b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> index 443a206..44bdc42 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> @@ -557,10 +557,16 @@ static int exynos_drm_platform_probe(struct
platform_device *pdev)
> return ret;
> #endif
>
> +#ifdef CONFIG_DRM_EXYNOS_DECON
> + ret = platform_driver_register(&decon_driver);
> + if (ret < 0)
> + goto err_unregister_fimd_drv;
> +#endif
> +
> #ifdef CONFIG_DRM_EXYNOS_DP
> ret = platform_driver_register(&dp_driver);
> if (ret < 0)
> - goto err_unregister_fimd_drv;
> + goto err_unregister_decon_drv;
> #endif
>
> #ifdef CONFIG_DRM_EXYNOS_DSI
> @@ -668,6 +674,11 @@ err_unregister_dp_drv:
>
> #ifdef CONFIG_DRM_EXYNOS_DP
> platform_driver_unregister(&dp_driver);
> +err_unregister_decon_drv:
> +#endif
> +
> +#ifdef CONFIG_DRM_EXYNOS_DECON
> + platform_driver_unregister(&decon_driver);
> err_unregister_fimd_drv:
> #endif
>
> @@ -709,6 +720,10 @@ static int exynos_drm_platform_remove(struct
platform_device *pdev)
> platform_driver_unregister(&fimd_driver);
> #endif
>
> +#ifdef CONFIG_DRM_EXYNOS_DECON
> + platform_driver_unregister(&decon_driver);
> +#endif
> +
> #ifdef CONFIG_DRM_EXYNOS_DSI
> platform_driver_unregister(&dsi_driver);
> #endif
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h
b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> index d22e640..25f750d 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> @@ -352,6 +352,16 @@ int exynos_drm_probe_vidi(void);
> */
> void exynos_drm_remove_vidi(void);
>
> +/*
> + * this function registers exynos drm decon platform device/driver.
> + */
> +int exynos_drm_probe_decon(void);
> +
> +/*
> + * this function unregister exynos drm decon platform device/driver.
> + */
> +void exynos_drm_remove_decon(void);
> +
> /* This function creates a encoder and a connector, and initializes
them. */
> int exynos_drm_create_enc_conn(struct drm_device *dev,
> struct exynos_drm_display *display);
> @@ -364,6 +374,7 @@ void exynos_drm_component_del(struct device *dev,
> enum exynos_drm_device_type dev_type);
>
> extern struct platform_driver fimd_driver;
> +extern struct platform_driver decon_driver;
> extern struct platform_driver dp_driver;
> extern struct platform_driver dsi_driver;
> extern struct platform_driver mixer_driver;
> diff --git a/include/video/samsung_decon.h b/include/video/samsung_decon.h
> new file mode 100644
> index 0000000..8839120
> --- /dev/null
> +++ b/include/video/samsung_decon.h
> @@ -0,0 +1,346 @@
> +/* include/video/exynos_drm_decon.h
> + *
> + * Copyright (c) 2014 Samsung Electronics Co., Ltd.
> + * Author: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
> + *
> + * 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.
> + */
> +
> +/* VIDCON0 */
> +#define VIDCON0 (0x00)
> +
> +#define VIDCON0_SWRESET (1 << 28)
> +#define VIDCON0_DECON_STOP_STATUS (1 << 2)
> +#define VIDCON0_ENVID (1 << 1)
> +#define VIDCON0_ENVID_F (1 << 0)
> +
> +/* VIDOUTCON0 */
> +#define VIDOUTCON0 (0x4)
> +
> +#define VIDOUTCON0_LCD_ON (0x1 << 24)
> +#define VIDOUTCON0_LCD_OFF (0x0 << 24)
> +#define VIDOUTCON0_IF_SHIFT (23)
> +#define VIDOUTCON0_IF_MASK (0x1 << 23)
> +#define VIDOUTCON0_RGBIF (0x0 << 23)
> +#define VIDOUTCON0_I80IF (0x1 << 23)
> +
> +/* VIDCON3 */
> +#define VIDCON3 (0x8)
> +
> +/* VIDCON4 */
> +#define VIDCON4 (0xC)
> +#define VIDCON4_FIFOCNT_START_EN (1 << 0)
> +
> +/* VCLKCON0 */
> +#define VCLKCON0 0x10
> +#define VCLKCON0_CLKVALUP (1 << 8)
> +#define VCLKCON0_VCLKFREE (1 << 0)
> +
> +/* VCLKCON */
> +#define VCLKCON1 0x14
> +#define VCLKCON1_CLKVAL_NUM_VCLK(val) (((val) & 0xff) << 0)
> +#define VCLKCON2 0x18
> +
> +/* SHADOWCON */
> +#define SHADOWCON (0x30)
> +
> +#define SHADOWCON_WINx_PROTECT(_win) (1 << (10 + (_win)))
> +
> +/* WINCONx */
> +#define WINCON(_win) (0x50 + ((_win) * 4))
> +
> +#define WINCONx_BUFSTATUS (0x3 << 30)
> +#define WINCONx_BUFSEL_MASK (0x3 << 28)
> +#define WINCONx_BUFSEL_SHIFT (28)
> +#define WINCONx_TRIPLE_BUF_MODE (0x1 << 18)
> +#define WINCONx_DOUBLE_BUF_MODE (0x0 << 18)
> +#define WINCONx_BURSTLEN_16WORD (0x0 << 11)
> +#define WINCONx_BURSTLEN_8WORD (0x1 << 11)
> +#define WINCONx_BURSTLEN_MASK (0x1 << 11)
> +#define WINCONx_BURSTLEN_SHIFT (11)
> +#define WINCONx_BLD_PLANE (0 << 8)
> +#define WINCONx_BLD_PIX (1 << 8)
> +#define WINCONx_ALPHA_MUL (1 << 7)
> +
> +#define WINCONx_BPPMODE_MASK (0xf << 2)
> +#define WINCONx_BPPMODE_SHIFT (2)
> +#define WINCONx_BPPMODE_16BPP_565 (0x8 << 2)
> +#define WINCONx_BPPMODE_24BPP_BGRx (0x7 << 2)
> +#define WINCONx_BPPMODE_24BPP_RGBx (0x6 << 2)
> +#define WINCONx_BPPMODE_24BPP_xBGR (0x5 << 2)
> +#define WINCONx_BPPMODE_24BPP_xRGB (0x4 << 2)
> +#define WINCONx_BPPMODE_32BPP_BGRA (0x3 << 2)
> +#define WINCONx_BPPMODE_32BPP_RGBA (0x2 << 2)
> +#define WINCONx_BPPMODE_32BPP_ABGR (0x1 << 2)
> +#define WINCONx_BPPMODE_32BPP_ARGB (0x0 << 2)
> +#define WINCONx_ALPHA_SEL (1 << 1)
> +#define WINCONx_ENWIN (1 << 0)
> +
> +#define WINCON1_ALPHA_MUL_F (1 << 7)
> +#define WINCON2_ALPHA_MUL_F (1 << 7)
> +#define WINCON3_ALPHA_MUL_F (1 << 7)
> +#define WINCON4_ALPHA_MUL_F (1 << 7)
> +
> +/* VIDOSDxH: The height for the OSD image(READ ONLY)*/
> +#define VIDOSD_H(_x) (0x80 + ((_x) * 4))
> +
> +/* Frame buffer start addresses: VIDWxxADD0n */
> +#define VIDW_BUF_START(_win) (0x80 + ((_win) * 0x10))
> +#define VIDW_BUF_START1(_win) (0x84 + ((_win) * 0x10))
> +#define VIDW_BUF_START2(_win) (0x88 + ((_win) * 0x10))
> +
> +#define VIDW_WHOLE_X(_win) (0x0130 + ((_win) * 8))
> +#define VIDW_WHOLE_Y(_win) (0x0134 + ((_win) * 8))
> +#define VIDW_OFFSET_X(_win) (0x0170 + ((_win) * 8))
> +#define VIDW_OFFSET_Y(_win) (0x0174 + ((_win) * 8))
> +#define VIDW_BLKOFFSET(_win) (0x01B0 + ((_win) * 4))
> +#define VIDW_BLKSIZE(win) (0x0200 + ((_win) * 4))
> +
> +/* Interrupt controls register */
> +#define VIDINTCON2 (0x228)
> +
> +#define VIDINTCON1_INTEXTRA1_EN (1 << 1)
> +#define VIDINTCON1_INTEXTRA0_EN (1 << 0)
> +
> +/* Interrupt controls and status register */
> +#define VIDINTCON3 (0x22C)
> +
> +#define VIDINTCON1_INTEXTRA1_PEND (1 << 1)
> +#define VIDINTCON1_INTEXTRA0_PEND (1 << 0)
> +
> +/* VIDOSDxA ~ VIDOSDxE */
> +#define VIDOSD_BASE (0x230)
> +
> +#define OSD_STRIDE (0x20)
> +
> +#define VIDOSD_A(_win) (VIDOSD_BASE + \
> + ((_win) * OSD_STRIDE) + 0x00)
> +#define VIDOSD_B(_win) (VIDOSD_BASE + \
> + ((_win) * OSD_STRIDE) + 0x04)
> +#define VIDOSD_C(_win) (VIDOSD_BASE + \
> + ((_win) * OSD_STRIDE) + 0x08)
> +#define VIDOSD_D(_win) (VIDOSD_BASE + \
> + ((_win) * OSD_STRIDE) + 0x0C)
> +#define VIDOSD_E(_win) (VIDOSD_BASE + \
> + ((_win) * OSD_STRIDE) + 0x10)
> +
> +#define VIDOSDxA_TOPLEFT_X_MASK (0x1fff << 13)
> +#define VIDOSDxA_TOPLEFT_X_SHIFT (13)
> +#define VIDOSDxA_TOPLEFT_X_LIMIT (0x1fff)
> +#define VIDOSDxA_TOPLEFT_X(_x) (((_x) & 0x1fff) << 13)
> +
> +#define VIDOSDxA_TOPLEFT_Y_MASK (0x1fff << 0)
> +#define VIDOSDxA_TOPLEFT_Y_SHIFT (0)
> +#define VIDOSDxA_TOPLEFT_Y_LIMIT (0x1fff)
> +#define VIDOSDxA_TOPLEFT_Y(_x) (((_x) & 0x1fff) << 0)
> +
> +#define VIDOSDxB_BOTRIGHT_X_MASK (0x1fff << 13)
> +#define VIDOSDxB_BOTRIGHT_X_SHIFT (13)
> +#define VIDOSDxB_BOTRIGHT_X_LIMIT (0x1fff)
> +#define VIDOSDxB_BOTRIGHT_X(_x) (((_x) & 0x1fff) << 13)
> +
> +#define VIDOSDxB_BOTRIGHT_Y_MASK (0x1fff << 0)
> +#define VIDOSDxB_BOTRIGHT_Y_SHIFT (0)
> +#define VIDOSDxB_BOTRIGHT_Y_LIMIT (0x1fff)
> +#define VIDOSDxB_BOTRIGHT_Y(_x) (((_x) & 0x1fff) << 0)
> +
> +#define VIDOSDxC_ALPHA0_R_F(_x) (((_x) & 0xFF) << 16)
> +#define VIDOSDxC_ALPHA0_G_F(_x) (((_x) & 0xFF) << 8)
> +#define VIDOSDxC_ALPHA0_B_F(_x) (((_x) & 0xFF) << 0)
> +
> +#define VIDOSDxD_ALPHA1_R_F(_x) (((_x) & 0xFF) << 16)
> +#define VIDOSDxD_ALPHA1_G_F(_x) (((_x) & 0xFF) << 8)
> +#define VIDOSDxD_ALPHA1_B_F(_x) (((_x) & 0xFF) >> 0)
> +
> +/* Window MAP (Color map) */
> +#define WINxMAP(_win) (0x340 + ((_win) * 4))
> +
> +#define WINxMAP_MAP (1 << 24)
> +#define WINxMAP_MAP_COLOUR_MASK (0xffffff << 0)
> +#define WINxMAP_MAP_COLOUR_SHIFT (0)
> +#define WINxMAP_MAP_COLOUR_LIMIT (0xffffff)
> +#define WINxMAP_MAP_COLOUR(_x) ((_x) << 0)
> +
> +/* Window colour-key control registers */
> +#define WKEYCON (0x370)
> +
> +#define WKEYCON0 (0x00)
> +#define WKEYCON1 (0x04)
> +#define WxKEYCON0_KEYBL_EN (1 << 26)
> +#define WxKEYCON0_KEYEN_F (1 << 25)
> +#define WxKEYCON0_DIRCON (1 << 24)
> +#define WxKEYCON0_COMPKEY_MASK (0xffffff << 0)
> +#define WxKEYCON0_COMPKEY_SHIFT (0)
> +#define WxKEYCON0_COMPKEY_LIMIT (0xffffff)
> +#define WxKEYCON0_COMPKEY(_x) ((_x) << 0)
> +#define WxKEYCON1_COLVAL_MASK (0xffffff << 0)
> +#define WxKEYCON1_COLVAL_SHIFT (0)
> +#define WxKEYCON1_COLVAL_LIMIT (0xffffff)
> +#define WxKEYCON1_COLVAL(_x) ((_x) << 0)
> +
> +/* color key control register for hardware window 1 ~ 4. */
> +#define WKEYCON0_BASE(x) ((WKEYCON + WKEYCON0) + ((x - 1) * 8))
> +/* color key value register for hardware window 1 ~ 4. */
> +#define WKEYCON1_BASE(x) ((WKEYCON + WKEYCON1) + ((x - 1) * 8))
> +
> +/* Window KEY Alpha value */
> +#define WxKEYALPHA(_win) (0x3A0 + (((_win) - 1) * 0x4))
> +
> +#define Wx_KEYALPHA_R_F_SHIFT (16)
> +#define Wx_KEYALPHA_G_F_SHIFT (8)
> +#define Wx_KEYALPHA_B_F_SHIFT (0)
> +
> +/* Blending equation */
> +#define BLENDE(_win) (0x03C0 + ((_win) * 4))
> +#define BLENDE_COEF_ZERO 0x0
> +#define BLENDE_COEF_ONE 0x1
> +#define BLENDE_COEF_ALPHA_A 0x2
> +#define BLENDE_COEF_ONE_MINUS_ALPHA_A 0x3
> +#define BLENDE_COEF_ALPHA_B 0x4
> +#define BLENDE_COEF_ONE_MINUS_ALPHA_B 0x5
> +#define BLENDE_COEF_ALPHA0 0x6
> +#define BLENDE_COEF_A 0xA
> +#define BLENDE_COEF_ONE_MINUS_A 0xB
> +#define BLENDE_COEF_B 0xC
> +#define BLENDE_COEF_ONE_MINUS_B 0xD
> +#define BLENDE_Q_FUNC(_v) ((_v) << 18)
> +#define BLENDE_P_FUNC(_v) ((_v) << 12)
> +#define BLENDE_B_FUNC(_v) ((_v) << 6)
> +#define BLENDE_A_FUNC(_v) ((_v) << 0)
> +
> +/* Blending equation control */
> +#define BLENDCON (0x3D8)
> +#define BLENDCON_NEW_MASK (1 << 0)
> +#define BLENDCON_NEW_8BIT_ALPHA_VALUE (1 << 0)
> +#define BLENDCON_NEW_4BIT_ALPHA_VALUE (0 << 0)
> +
> +/* Interrupt control register */
> +#define VIDINTCON0 (0x500)
> +
> +#define VIDINTCON0_WAKEUP_MASK (0x3f << 26)
> +#define VIDINTCON0_INTEXTRAEN (1 << 21)
> +
> +#define VIDINTCON0_FRAMESEL0_SHIFT (15)
> +#define VIDINTCON0_FRAMESEL0_MASK (0x3 << 15)
> +#define VIDINTCON0_FRAMESEL0_BACKPORCH (0x0 << 15)
> +#define VIDINTCON0_FRAMESEL0_VSYNC (0x1 << 15)
> +#define VIDINTCON0_FRAMESEL0_ACTIVE (0x2 << 15)
> +#define VIDINTCON0_FRAMESEL0_FRONTPORCH (0x3 << 15)
> +
> +#define VIDINTCON0_INT_FRAME (1 << 11)
> +
> +#define VIDINTCON0_FIFOLEVEL_MASK (0x7 << 3)
> +#define VIDINTCON0_FIFOLEVEL_SHIFT (3)
> +#define VIDINTCON0_FIFOLEVEL_EMPTY (0x0 << 3)
> +#define VIDINTCON0_FIFOLEVEL_TO25PC (0x1 << 3)
> +#define VIDINTCON0_FIFOLEVEL_TO50PC (0x2 << 3)
> +#define VIDINTCON0_FIFOLEVEL_FULL (0x4 << 3)
> +
> +#define VIDINTCON0_FIFOSEL_MAIN_EN (1 << 1)
> +#define VIDINTCON0_INT_FIFO (1 << 1)
> +
> +#define VIDINTCON0_INT_ENABLE (1 << 0)
> +
> +/* Interrupt controls and status register */
> +#define VIDINTCON1 (0x504)
> +
> +#define VIDINTCON1_INT_EXTRA (1 << 3)
> +#define VIDINTCON1_INT_I80 (1 << 2)
> +#define VIDINTCON1_INT_FRAME (1 << 1)
> +#define VIDINTCON1_INT_FIFO (1 << 0)
> +
> +/* VIDCON1 */
> +#define VIDCON1(_x) (0x0600 + ((_x) * 0x50))
> +#define VIDCON1_LINECNT_GET(_v) (((_v) >> 17) & 0x1fff)
> +#define VIDCON1_VCLK_MASK (0x3 << 9)
> +#define VIDCON1_VCLK_HOLD (0x0 << 9)
> +#define VIDCON1_VCLK_RUN (0x1 << 9)
> +#define VIDCON1_VCLK_RUN_VDEN_DISABLE (0x3 << 9)
> +#define VIDCON1_RGB_ORDER_O_MASK (0x7 << 4)
> +#define VIDCON1_RGB_ORDER_O_RGB (0x0 << 4)
> +#define VIDCON1_RGB_ORDER_O_GBR (0x1 << 4)
> +#define VIDCON1_RGB_ORDER_O_BRG (0x2 << 4)
> +#define VIDCON1_RGB_ORDER_O_BGR (0x4 << 4)
> +#define VIDCON1_RGB_ORDER_O_RBG (0x5 << 4)
> +#define VIDCON1_RGB_ORDER_O_GRB (0x6 << 4)
> +
> +/* VIDTCON0 */
> +#define VIDTCON0 (0x610)
> +
> +#define VIDTCON0_VBPD_MASK (0xffff << 16)
> +#define VIDTCON0_VBPD_SHIFT (16)
> +#define VIDTCON0_VBPD_LIMIT (0xffff)
> +#define VIDTCON0_VBPD(_x) ((_x) << 16)
> +
> +#define VIDTCON0_VFPD_MASK (0xffff << 0)
> +#define VIDTCON0_VFPD_SHIFT (0)
> +#define VIDTCON0_VFPD_LIMIT (0xffff)
> +#define VIDTCON0_VFPD(_x) ((_x) << 0)
> +
> +/* VIDTCON1 */
> +#define VIDTCON1 (0x614)
> +
> +#define VIDTCON1_VSPW_MASK (0xffff << 16)
> +#define VIDTCON1_VSPW_SHIFT (16)
> +#define VIDTCON1_VSPW_LIMIT (0xffff)
> +#define VIDTCON1_VSPW(_x) ((_x) << 16)
> +
> +/* VIDTCON2 */
> +#define VIDTCON2 (0x618)
> +
> +#define VIDTCON2_HBPD_MASK (0xffff << 16)
> +#define VIDTCON2_HBPD_SHIFT (16)
> +#define VIDTCON2_HBPD_LIMIT (0xffff)
> +#define VIDTCON2_HBPD(_x) ((_x) << 16)
> +
> +#define VIDTCON2_HFPD_MASK (0xffff << 0)
> +#define VIDTCON2_HFPD_SHIFT (0)
> +#define VIDTCON2_HFPD_LIMIT (0xffff)
> +#define VIDTCON2_HFPD(_x) ((_x) << 0)
> +
> +/* VIDTCON3 */
> +#define VIDTCON3 (0x61C)
> +
> +#define VIDTCON3_HSPW_MASK (0xffff << 16)
> +#define VIDTCON3_HSPW_SHIFT (16)
> +#define VIDTCON3_HSPW_LIMIT (0xffff)
> +#define VIDTCON3_HSPW(_x) ((_x) << 16)
> +
> +/* VIDTCON4 */
> +#define VIDTCON4 (0x620)
> +
> +#define VIDTCON4_LINEVAL_MASK (0xfff << 16)
> +#define VIDTCON4_LINEVAL_SHIFT (16)
> +#define VIDTCON4_LINEVAL_LIMIT (0xfff)
> +#define VIDTCON4_LINEVAL(_x) (((_x) & 0xfff) << 16)
> +
> +#define VIDTCON4_HOZVAL_MASK (0xfff << 0)
> +#define VIDTCON4_HOZVAL_SHIFT (0)
> +#define VIDTCON4_HOZVAL_LIMIT (0xfff)
> +#define VIDTCON4_HOZVAL(_x) (((_x) & 0xfff) << 0)
> +
> +/* LINECNT OP THRSHOLD*/
> +#define LINECNT_OP_THRESHOLD (0x630)
> +
> +/* CRCCTRL */
> +#define CRCCTRL (0x6C8)
> +#define CRCCTRL_CRCCLKEN (0x1 << 2)
> +#define CRCCTRL_CRCSTART_F (0x1 << 1)
> +#define CRCCTRL_CRCEN (0x1 << 0)
> +
> +/* DECON_CMU */
> +#define DECON_CMU (0x704)
> +
> +#define DECON_CMU_ALL_CLKGATE_ENABLE (0x3)
> +#define DECON_CMU_SE_CLKGATE_ENABLE (0x1 << 2)
> +#define DECON_CMU_SFR_CLKGATE_ENABLE (0x1 << 1)
> +#define DECON_CMU_MEM_CLKGATE_ENABLE (0x1 << 0)
> +
> +/* DECON_UPDATE */
> +#define DECON_UPDATE (0x710)
> +
> +#define DECON_UPDATE_SLAVE_SYNC (1 << 4)
> +#define DECON_UPDATE_STANDALONE_F (1 << 0)
>
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