[RFC PATCH] drm/exynos: Add DECON driver
Inki Dae
inki.dae at samsung.com
Wed Oct 22 07:56:43 PDT 2014
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 at samsung.com>
> Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
> ---
> .../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 at 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 at 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 at samsung.com>
> + * Ajay Kumar <ajaykumar.rs at 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 <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 at 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.
> + */
> +
> +/* 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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