From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jianwei.Wang@freescale.com (Jianwei.Wang at freescale.com)
Date: Thu, 26 Mar 2015 05:58:53 +0000
Subject: [PATCH 1/3] drm/layerscape: Add fsl dcu DRM driver
In-Reply-To: <cfab32fbbc5e30f26927baa6d5c5c43c@agner.ch>
References: <1423825436-47780-1-git-send-email-b52261@freescale.com>
 <cfab32fbbc5e30f26927baa6d5c5c43c@agner.ch>
Message-ID: <DM2PR0301MB1229560C380582E06E2AF2129F080@DM2PR0301MB1229.namprd03.prod.outlook.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi Stefan,

I have tested recently, this driver also works on Vybrid twr board. I
send V3 patches just now, Please help test it on Vybrid board if necessary.

Regards,

Jianwei

> -----Original Message-----
> From: Stefan Agner [mailto:stefan at agner.ch]
> Sent: Wednesday, March 04, 2015 11:04 PM
> To: Wang Jianwei-B52261
> Cc: dri-devel at lists.freedesktop.org; jbarnes at virtuousgeek.org; Wood Scott-
> B07421; Xiubo Li; Wang Huan-B18965; linux-kernel at vger.kernel.org; linux-
> arm-kernel at lists.infradead.org
> Subject: Re: [PATCH 1/3] drm/layerscape: Add fsl dcu DRM driver
> 
> On 2015-02-13 12:03, Jianwei Wang wrote:
> > This patch add support for Two Dimensional Animation and Compositing
> > Engine (2D-ACE) on the Freescale LS102x SoCs.
> >
> > 2D-ACE is a Freescale display controller. It supports at most four
> > plane and provide an hardware cursor.
> >
> > This is a simplified version, only a primary plane, a fb created for
> > fbdev, a crtc, a connector for TFT LCD panel, an encoder, and the
> > encoder is not in use. Now this drver support fbdev only.
> 
> Hi,
> 
> Do you know if that driver also works on Vybrid devices? Vybrid has also
> DCU4 module with 2D-ACE functionality, also the registers look pretty
> similar. I was thinking about creating a driver for Vybrid anyway...
> 
> Some remarks below...
> 
> 
> >
> > Signed-off-by: Alison Wang <b18965@freescale.com>
> > Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
> > Signed-off-by: Jianwei Wang <b52261@freescale.com>
> > ---
> >  .../devicetree/bindings/video/fsl,dcfb.txt         |  50 +++
> >  drivers/gpu/drm/Kconfig                            |   2 +
> >  drivers/gpu/drm/Makefile                           |   1 +
> >  drivers/gpu/drm/fsl/Kconfig                        |  17 +
> >  drivers/gpu/drm/fsl/Makefile                       |   7 +
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.c             | 412
> +++++++++++++++++++++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.h             |  40 ++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_drv.c              | 323
> ++++++++++++++++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_drv.h              | 167 +++++++++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_fbdev.c            |  43 +++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_kms.c              |  45 +++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_kms.h              |  22 ++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_plane.c            | 124 +++++++
> >  drivers/gpu/drm/fsl/fsl_dcu_drm_plane.h            |  28 ++
> >  14 files changed, 1281 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/video/fsl,dcfb.txt
> >  create mode 100644 drivers/gpu/drm/fsl/Kconfig  create mode 100644
> > drivers/gpu/drm/fsl/Makefile  create mode 100644
> > drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.c
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.h
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_drv.c
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_drv.h
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_fbdev.c
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_kms.c
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_kms.h
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_plane.c
> >  create mode 100644 drivers/gpu/drm/fsl/fsl_dcu_drm_plane.h
> >
> > diff --git a/Documentation/devicetree/bindings/video/fsl,dcfb.txt
> > b/Documentation/devicetree/bindings/video/fsl,dcfb.txt
> > new file mode 100644
> > index 0000000..de7da97
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/video/fsl,dcfb.txt
> > @@ -0,0 +1,50 @@
> > +* Freescale Simple Display Controller FB Driver
> 
> "FB Driver" probably refers more to a fbdev driver in the Linux kernel
> sense, but since this is a DRM driver this is somewhat confusing. The
> binding should describe the hardware, in the Vybrid RM mentions the IP as
> "Display Control Unit (DCU4)", so maybe
> 
> Freescale Display Controller Unit (DCU4) module
> 
> Also, instead of using dcfb, I would use somewhat more hardware describing,
> e.g. dcu4?
> 
> > +
> > +Required properties:
> > +- compatible:		Should be one of "fsl,ls1021a-dcfb".
> 
> If the driver also works for Vybrid, be favorable to have a generic
> compatible string, e.g. fsl,dcu4?
> 
> > +- reg:			Address and length of the register set for dcfb.
> > +- clocks:		From common clock binding: handle to dcfb clock.
> > +- clock-names:		From common clock binding: Shall be "dcfb".
> > +- display:		The phandle to display node.
> > +
> > +Optional properties:
> > +- scfg-controller:	The phandle of scfg node.
> > +
> > +Required properties:
> > +- bits-per-pixel:	<16> for RGB565,
> > +			<24> for RGB888,
> > +			<32> for RGB8888.
> > +
> > +Required timing node for dispplay sub-node:
> > +- display-timings:	Refer to binding doc display-timing.txt for
> details.
> > +
> > +Examples:
> > +dcfb: dcfb at 2ce0000 {
> > +	compatible = "fsl,ls1021a-dcfb";
> > +	reg = <0x0 0x2ce0000 0x0 0x10000>;
> > +	clocks = <&platform_clk 0>;
> > +	clock-names = "dcfb";
> > +	scfg-controller = <&scfg>;
> > +	display = <&display>;
> > +
> > +	display: display at 0 {
> > +		bits-per-pixel = <24>;
> > +
> > +		display-timings {
> > +			native-mode = <&timing0>;
> > +			timing0: nl4827hc19 {
> > +				clock-frequency = <10870000>;
> > +				hactive = <480>;
> > +				vactive = <272>;
> > +				hback-porch = <2>;
> > +				hfront-porch = <2>;
> > +				vback-porch = <1>;
> > +				vfront-porch = <1>;
> > +				hsync-len = <41>;
> > +				vsync-len = <2>;
> > +				hsync-active = <1>;
> > +				vsync-active = <1>;
> > +			};
> > +		};
> > +	};
> > +};
> > diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index
> > 151a050..a6957aa 100644
> > --- a/drivers/gpu/drm/Kconfig
> > +++ b/drivers/gpu/drm/Kconfig
> > @@ -199,6 +199,8 @@ source "drivers/gpu/drm/bochs/Kconfig"
> >
> >  source "drivers/gpu/drm/msm/Kconfig"
> >
> > +source "drivers/gpu/drm/fsl/Kconfig"
> > +
> >  source "drivers/gpu/drm/tegra/Kconfig"
> >
> >  source "drivers/gpu/drm/panel/Kconfig"
> > diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index
> > 2c239b9..ab5b9ef 100644
> > --- a/drivers/gpu/drm/Makefile
> > +++ b/drivers/gpu/drm/Makefile
> > @@ -56,6 +56,7 @@ obj-$(CONFIG_DRM_UDL) += udl/
> >  obj-$(CONFIG_DRM_AST) += ast/
> >  obj-$(CONFIG_DRM_ARMADA) += armada/
> >  obj-$(CONFIG_DRM_ATMEL_HLCDC)	+= atmel-hlcdc/
> > +obj-$(CONFIG_DRM_FSL_DCU) += fsl/
> >  obj-$(CONFIG_DRM_RCAR_DU) += rcar-du/
> >  obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
> >  obj-$(CONFIG_DRM_OMAP)	+= omapdrm/
> > diff --git a/drivers/gpu/drm/fsl/Kconfig b/drivers/gpu/drm/fsl/Kconfig
> > new file mode 100644 index 0000000..e4f8df0
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/Kconfig
> > @@ -0,0 +1,17 @@
> > +config DRM_FSL_DCU
> > +	tristate "DRM Support for Freescale DCU"
> > +	depends on DRM && OF && ARM
> > +	select DRM_KMS_HELPER
> > +	select DRM_KMS_CMA_HELPER
> > +	select VIDEOMODE_HELPERS
> > +	select BACKLIGHT_CLASS_DEVICE
> > +	select BACKLIGHT_LCD_SUPPORT
> > +	select REGMAP_MMIO
> > +	select DRM_KMS_FB_HELPER
> > +	select FB_SYS_FILLRECT
> > +	select FB_SYS_COPYAREA
> > +	select FB_SYS_IMAGEBLIT
> > +	select FB_SYS_FOPS
> > +	help
> > +	  Choose this option if you have an Freescale DCU chipset.
> > +	  If M is selected the module will be called fsl-dcu-drm.
> > diff --git a/drivers/gpu/drm/fsl/Makefile
> > b/drivers/gpu/drm/fsl/Makefile new file mode 100644 index
> > 0000000..51c3e1f
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/Makefile
> > @@ -0,0 +1,7 @@
> > +fsl-dcu-drm-y := fsl_dcu_drm_drv.o \
> > +	       fsl_dcu_drm_kms.o \
> > +	       fsl_dcu_drm_plane.o \
> > +	       fsl_dcu_drm_crtc.o \
> > +	       fsl_dcu_drm_fbdev.o \
> > +
> > +obj-$(CONFIG_DRM_FSL_DCU)	+= fsl-dcu-drm.o
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.c
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.c
> > new file mode 100644
> > index 0000000..9f5ba86
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.c
> > @@ -0,0 +1,412 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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 <linux/backlight.h>
> > +#include <linux/clk.h>
> > +#include <linux/regmap.h>
> > +
> > +#include <drm/drmP.h>
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_crtc.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_fb_cma_helper.h>
> > +#include <drm/drm_gem_cma_helper.h>
> > +#include <drm/drm_plane_helper.h>
> > +#include <video/of_display_timing.h>
> > +
> > +#include "fsl_dcu_drm_crtc.h"
> > +#include "fsl_dcu_drm_drv.h"
> > +#include "fsl_dcu_drm_kms.h"
> > +#include "fsl_dcu_drm_plane.h"
> > +
> > +#define to_fsl_dcu_crtc(c)	container_of(c, struct fsl_dcu_drm_crtc,
> crtc)
> > +
> > +static void fsl_dcu_drm_crtc_start(struct drm_crtc *crtc) {
> > +	fsl_dcu_drm_plane_setup(crtc->primary);
> > +}
> > +
> > +static void fsl_dcu_drm_crtc_stop(struct drm_crtc *crtc) { }
> > +
> > +void fsl_dcu_drm_crtc_suspend(struct drm_crtc *crtc) {
> > +	fsl_dcu_drm_crtc_stop(crtc);
> > +}
> > +
> > +void fsl_dcu_drm_crtc_resume(struct drm_crtc *crtc) {
> > +	struct fsl_dcu_drm_crtc *fsl_crtc = to_fsl_dcu_crtc(crtc);
> > +
> > +	if (fsl_crtc->dpms != DRM_MODE_DPMS_ON)
> > +		return;
> > +
> > +	fsl_dcu_drm_crtc_start(crtc);
> > +}
> > +
> > +static void fsl_dcu_drm_crtc_update_base(struct drm_crtc *crtc) { }
> > +
> > +static void fsl_dcu_drm_crtc_dpms(struct drm_crtc *crtc, int mode) {
> > +	struct fsl_dcu_drm_crtc *fsl_crtc = to_fsl_dcu_crtc(crtc);
> > +
> > +	if (fsl_crtc->dpms == mode)
> > +		return;
> > +
> > +	if (mode == DRM_MODE_DPMS_ON)
> > +		fsl_dcu_drm_crtc_start(crtc);
> > +	else
> > +		fsl_dcu_drm_crtc_stop(crtc);
> > +
> > +	fsl_crtc->dpms = mode;
> > +}
> > +
> > +static bool fsl_dcu_drm_crtc_mode_fixup(struct drm_crtc *crtc,
> > +					const struct drm_display_mode *mode,
> > +					struct drm_display_mode *adjusted_mode) {
> > +	return true;
> > +}
> > +
> > +static void fsl_dcu_drm_crtc_mode_prepare(struct drm_crtc *crtc) {
> > +		fsl_dcu_drm_crtc_stop(crtc);
> > +}
> > +
> > +static int fsl_dcu_drm_crtc_mode_set(struct drm_crtc *crtc,
> > +				     struct drm_display_mode *mode,
> > +				     struct drm_display_mode *adjusted_mode,
> > +				     int x, int y,
> > +				     struct drm_framebuffer *old_fb) {
> > +	struct drm_device *dev = crtc->dev;
> > +	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
> > +	uint32_t hbp, hfp, hsw, vbp, vfp, vsw, div, index;
> > +
> > +	DBG(": set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
> > +	    mode->base.id, mode->name,
> > +	    mode->vrefresh, mode->clock,
> > +	    mode->hdisplay, mode->hsync_start,
> > +	    mode->hsync_end, mode->htotal,
> > +	    mode->vdisplay, mode->vsync_start,
> > +	    mode->vsync_end, mode->vtotal,
> > +	    mode->type, mode->flags);
> > +
> > +	index = drm_crtc_index(crtc);
> > +	div = (uint32_t)clk_get_rate(fsl_dev->clk) / crtc->mode.clock /
> > +1000;
> > +
> > +	/* Configure timings: */
> > +	hbp = mode->htotal - mode->hsync_end;
> > +	hfp = mode->hsync_start - mode->hdisplay;
> > +	hsw = mode->hsync_end - mode->hsync_start;
> > +	vbp = mode->vtotal - mode->vsync_end;
> > +	vfp = mode->vsync_start - mode->vdisplay;
> > +	vsw = mode->vsync_end - mode->vsync_start;
> > +
> > +	regmap_write(fsl_dev->regmap, DCU_HSYN_PARA,
> > +		     DCU_HSYN_PARA_BP(hbp) |
> > +		     DCU_HSYN_PARA_PW(hsw) |
> > +		     DCU_HSYN_PARA_FP(hfp));
> > +	regmap_write(fsl_dev->regmap, DCU_VSYN_PARA,
> > +		     DCU_VSYN_PARA_BP(vbp) |
> > +		     DCU_VSYN_PARA_PW(vsw) |
> > +		     DCU_VSYN_PARA_FP(vfp));
> > +	regmap_write(fsl_dev->regmap, DCU_DISP_SIZE,
> > +		     DCU_DISP_SIZE_DELTA_Y(mode->vdisplay) |
> > +		     DCU_DISP_SIZE_DELTA_X(mode->hdisplay));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_1(index),
> > +		     DCU_CTRLDESCLN_1_HEIGHT(mode->vdisplay) |
> > +		     DCU_CTRLDESCLN_1_WIDTH(mode->hdisplay));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_2(index),
> > +		     DCU_CTRLDESCLN_2_POSY(y) |
> > +		     DCU_CTRLDESCLN_2_POSX(x));
> > +	regmap_write(fsl_dev->regmap, DCU_DIV_RATIO, div);
> > +	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
> > +DCU_UPDATE_MODE_READREG);
> > +
> > +	return 0;
> > +}
> > +
> > +static void fsl_dcu_drm_crtc_mode_commit(struct drm_crtc *crtc) {
> > +		fsl_dcu_drm_crtc_start(crtc);
> > +}
> > +
> > +static int fsl_dcu_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x,
> int y,
> > +					  struct drm_framebuffer *old_fb) {
> > +	fsl_dcu_drm_crtc_update_base(crtc);
> > +
> > +	return 0;
> > +}
> > +
> > +static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
> > +	.dpms = fsl_dcu_drm_crtc_dpms,
> > +	.mode_fixup = fsl_dcu_drm_crtc_mode_fixup,
> > +	.prepare = fsl_dcu_drm_crtc_mode_prepare,
> > +	.commit = fsl_dcu_drm_crtc_mode_commit,
> > +	.mode_set = fsl_dcu_drm_crtc_mode_set,
> > +	.mode_set_base = fsl_dcu_drm_crtc_mode_set_base, };
> > +
> > +static int fsl_dcu_drm_crtc_page_flip(struct drm_crtc *crtc,
> > +				      struct drm_framebuffer *fb,
> > +				      struct drm_pending_vblank_event *event,
> > +				      uint32_t page_flip_flags)
> > +{
> > +	return 0;
> > +}
> > +
> > +static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
> > +	.update_plane = fsl_dcu_drm_plane_update,
> > +	.disable_plane = fsl_dcu_drm_plane_disable,
> > +	.destroy = fsl_dcu_drm_plane_destroy, };
> > +
> > +static const struct drm_crtc_funcs crtc_funcs = {
> > +	.destroy = drm_crtc_cleanup,
> > +	.set_config = drm_crtc_helper_set_config,
> > +	.page_flip = fsl_dcu_drm_crtc_page_flip, };
> > +
> > +int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev) {
> > +	struct drm_crtc *crtc = &fsl_dev->crtc.crtc;
> > +	int ret;
> > +
> > +	fsl_dev->crtc.dpms = DRM_MODE_DPMS_OFF;
> > +
> > +	ret = drm_crtc_init(fsl_dev->ddev, crtc, &crtc_funcs);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	crtc->primary->funcs = &fsl_dcu_drm_plane_funcs;
> > +
> > +	drm_crtc_helper_add(crtc, &crtc_helper_funcs);
> > +
> > +	regmap_write(fsl_dev->regmap, DCU_SYN_POL,
> > +		     DCU_SYN_POL_INV_VS_LOW | DCU_SYN_POL_INV_HS_LOW);
> > +	regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) |
> > +		     DCU_BGND_G(0) | DCU_BGND_B(0));
> > +	regmap_write(fsl_dev->regmap, DCU_DCU_MODE,
> > +		     DCU_MODE_BLEND_ITER(1) | DCU_MODE_RASTER_EN);
> > +	regmap_write(fsl_dev->regmap, DCU_THRESHOLD,
> > +		     DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) |
> > +		     DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) |
> > +		     DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL));
> > +	regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE,
> > +			   DCU_MODE_DCU_MODE_MASK,
> > +			   DCU_MODE_DCU_MODE(DCU_MODE_NORMAL));
> > +	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
> DCU_UPDATE_MODE_READREG);
> > +	return 0;
> > +}
> > +
> > +/*
> > + * Encoder
> > + */
> > +
> > +#define to_fsl_dcu_encoder(e) \
> > +	container_of(e, struct fsl_dcu_drm_encoder, encoder)
> > +
> > +static void fsl_dcu_drm_encoder_dpms(struct drm_encoder *encoder, int
> > +mode) {
> > +	struct fsl_dcu_drm_encoder *fsl_enc = to_fsl_dcu_encoder(encoder);
> > +
> > +	if (fsl_enc->dpms == mode)
> > +		return;
> > +
> > +	fsl_enc->dpms = mode;
> > +}
> > +
> > +static bool fsl_dcu_drm_encoder_mode_fixup
> > +		(struct drm_encoder *encoder,
> > +		const struct drm_display_mode *mode,
> > +		struct drm_display_mode *adjusted_mode) {
> > +	struct drm_device *dev = encoder->dev;
> > +	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
> > +	struct drm_connector *connector = &fsl_dev->connector.connector;
> > +	const struct drm_display_mode *panel_mode;
> > +
> > +	if (list_empty(&connector->modes)) {
> > +		dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
> > +		return false;
> > +	}
> > +
> > +	/* The flat panel mode is fixed, just copy it to the adjusted mode.
> */
> > +	panel_mode = list_first_entry(&connector->modes,
> > +				      struct drm_display_mode, head);
> > +	drm_mode_copy(adjusted_mode, panel_mode);
> > +
> > +	return true;
> > +}
> > +
> > +static void fsl_dcu_drm_encoder_mode_prepare(struct drm_encoder
> > +*encoder) { }
> > +
> > +static void fsl_dcu_drm_encoder_mode_set(struct drm_encoder *encoder,
> > +					 struct drm_display_mode *mode,
> > +					 struct drm_display_mode *adjusted_mode) { }
> > +
> > +static void fsl_dcu_drm_encoder_mode_commit(struct drm_encoder
> > +*encoder) {
> > +	;
> > +}
> > +
> > +static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
> > +	.dpms = fsl_dcu_drm_encoder_dpms,
> > +	.mode_fixup = fsl_dcu_drm_encoder_mode_fixup,
> > +	.prepare = fsl_dcu_drm_encoder_mode_prepare,
> > +	.commit = fsl_dcu_drm_encoder_mode_commit,
> > +	.mode_set = fsl_dcu_drm_encoder_mode_set, };
> > +
> > +static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
> > +{
> > +	drm_encoder_cleanup(encoder);
> > +}
> > +
> > +static const struct drm_encoder_funcs encoder_funcs = {
> > +	.destroy = fsl_dcu_drm_encoder_destroy, };
> > +
> > +int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev) {
> > +	struct drm_encoder *encoder = &fsl_dev->encoder.encoder;
> > +	int ret;
> > +
> > +	fsl_dev->encoder.dpms = DRM_MODE_DPMS_OFF;
> > +
> > +	encoder->possible_crtcs = 1;
> > +
> > +	ret = drm_encoder_init(fsl_dev->ddev, encoder, &encoder_funcs,
> > +			       DRM_MODE_ENCODER_LVDS);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	drm_encoder_helper_add(encoder, &encoder_helper_funcs);
> > +
> > +	return 0;
> > +}
> > +
> > +/*
> > + * Connector
> > + */
> > +
> > +#define to_fsl_dcu_connector(c) \
> > +	container_of(c, struct fsl_dcu_drm_connector, connector)
> > +
> > +static int fsl_dcu_drm_connector_get_modes(struct drm_connector
> > +*connector) {
> > +	struct drm_device *dev = connector->dev;
> > +	struct device_node *display_np, *np = dev->dev->of_node;
> > +	struct drm_display_mode *mode = drm_mode_create(connector->dev);
> > +	int num_modes = 0;
> > +
> > +	if (np) {
> > +		display_np = of_parse_phandle(np, "display", 0);
> > +		if (!display_np) {
> > +			dev_err(dev->dev, "failed to find display phandle\n");
> > +			return num_modes;
> > +		}
> > +		of_get_drm_display_mode(display_np, mode, OF_USE_NATIVE_MODE);
> > +		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
> > +		drm_mode_probed_add(connector, mode);
> > +		num_modes++;
> > +	}
> > +
> > +	return num_modes;
> > +}
> > +
> > +static int fsl_dcu_drm_connector_mode_valid(struct drm_connector
> *connector,
> > +					    struct drm_display_mode *mode) {
> > +	return MODE_OK;
> > +}
> > +
> > +static struct drm_encoder *
> > +fsl_dcu_drm_connector_best_encoder(struct drm_connector *connector) {
> > +	struct fsl_dcu_drm_connector *fsl_con =
> > +to_fsl_dcu_connector(connector);
> > +
> > +	return fsl_con->encoder;
> > +}
> > +
> > +static const struct drm_connector_helper_funcs connector_helper_funcs =
> {
> > +	.get_modes = fsl_dcu_drm_connector_get_modes,
> > +	.mode_valid = fsl_dcu_drm_connector_mode_valid,
> > +	.best_encoder = fsl_dcu_drm_connector_best_encoder,
> > +};
> > +
> > +static void fsl_dcu_drm_connector_destroy(struct drm_connector
> > +*connector) {
> > +	drm_connector_unregister(connector);
> > +	drm_connector_cleanup(connector);
> > +}
> > +
> > +static enum drm_connector_status
> > +fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool
> > +force) {
> > +	return connector_status_connected;
> > +}
> > +
> > +static const struct drm_connector_funcs connector_funcs = {
> > +	.dpms = drm_helper_connector_dpms,
> > +	.detect = fsl_dcu_drm_connector_detect,
> > +	.fill_modes = drm_helper_probe_single_connector_modes,
> > +	.destroy = fsl_dcu_drm_connector_destroy, };
> > +
> > +int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
> > +				 struct drm_encoder *encoder)
> > +{
> > +	struct drm_connector *connector = &fsl_dev->connector.connector;
> > +	int ret;
> > +
> > +	fsl_dev->connector.encoder = encoder;
> > +
> > +	connector->display_info.width_mm = 0;
> > +	connector->display_info.height_mm = 0;
> > +
> > +	ret = drm_connector_init(fsl_dev->ddev, connector, &connector_funcs,
> > +				 DRM_MODE_CONNECTOR_LVDS);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	drm_connector_helper_add(connector, &connector_helper_funcs);
> > +	ret = drm_connector_register(connector);
> > +	if (ret < 0)
> > +		goto err_cleanup;
> > +
> > +	ret = drm_mode_connector_attach_encoder(connector, encoder);
> > +	if (ret < 0)
> > +		goto err_sysfs;
> > +
> > +	connector->encoder = encoder;
> > +
> > +	drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
> > +	drm_object_property_set_value
> > +		(&connector->base, fsl_dev->ddev->mode_config.dpms_property,
> > +		DRM_MODE_DPMS_OFF);
> > +
> > +	return 0;
> > +
> > +err_sysfs:
> > +	drm_connector_unregister(connector);
> > +err_cleanup:
> > +	drm_connector_cleanup(connector);
> > +	return ret;
> > +}
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.h
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.h
> > new file mode 100644
> > index 0000000..ad59992
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_crtc.h
> > @@ -0,0 +1,40 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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.
> > + */
> > +
> > +#ifndef __FSL_DCU_DRM_MODSET_H__
> > +#define __FSL_DCU_DRM_MODSET_H__
> > +
> > +#include <drm/drmP.h>
> > +#include <drm/drm_crtc.h>
> > +
> > +struct fsl_dcu_drm_device;
> > +
> > +struct fsl_dcu_drm_crtc {
> > +	struct drm_crtc crtc;
> > +	int dpms;
> > +};
> > +
> > +struct fsl_dcu_drm_encoder {
> > +	struct drm_encoder encoder;
> > +	int dpms;
> > +};
> > +
> > +struct fsl_dcu_drm_connector {
> > +	struct drm_connector connector;
> > +	struct drm_encoder *encoder;
> > +};
> > +
> > +int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev); int
> > +fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev); int
> > +fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
> > +				 struct drm_encoder *encoder);
> > +
> > +#endif /* __FSL_DCU_DRM_MODSET_H__ */
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_drv.c
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_drv.c
> > new file mode 100644
> > index 0000000..1bca45a
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_drv.c
> > @@ -0,0 +1,323 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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 <linux/clk.h>
> > +#include <linux/io.h>
> > +#include <linux/mm.h>
> > +#include <linux/module.h>
> > +#include <linux/of_platform.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/pm.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regmap.h>
> > +#include <linux/slab.h>
> > +
> > +#include <drm/drmP.h>
> > +#include "fsl_dcu_drm_drv.h"
> > +#include "fsl_dcu_drm_kms.h"
> > +
> > +static int fsl_dcu_unload(struct drm_device *dev) {
> > +	drm_mode_config_cleanup(dev);
> > +	drm_vblank_cleanup(dev);
> > +	drm_irq_uninstall(dev);
> > +
> > +	dev->dev_private = NULL;
> > +
> > +	return 0;
> > +}
> > +
> > +static struct regmap_config fsl_dcu_regmap_config = {
> > +	.reg_bits = 32,
> > +	.reg_stride = 4,
> > +	.val_bits = 32,
> > +};
> > +
> > +static int fsl_dcu_bypass_tcon(struct fsl_dcu_drm_device *fsl_dev,
> > +			       struct device_node *np)
> > +{
> > +	struct device_node *tcon_np;
> > +	struct platform_device *pdev;
> > +	struct clk *tcon_clk;
> > +	struct resource *res;
> > +	void __iomem *base;
> > +
> > +	tcon_np = of_parse_phandle(np, "tcon-controller", 0);
> > +	if (!tcon_np)
> > +		return -EINVAL;
> > +
> > +	pdev = of_find_device_by_node(tcon_np);
> > +	if (!pdev)
> > +		return -EINVAL;
> > +
> > +	tcon_clk = devm_clk_get(&pdev->dev, "tcon");
> > +	if (IS_ERR(tcon_clk))
> > +		return PTR_ERR(tcon_clk);
> > +	clk_prepare_enable(tcon_clk);
> > +
> > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +	if (!res)
> > +		return -ENODEV;
> > +
> > +	base = devm_ioremap_resource(&pdev->dev, res);
> > +	if (IS_ERR(base))
> > +		return PTR_ERR(base);
> > +
> > +	fsl_dev->tcon_regmap = devm_regmap_init_mmio_clk(&pdev->dev,
> > +			"tcon", base, &fsl_dcu_regmap_config);
> > +	if (IS_ERR(fsl_dev->tcon_regmap)) {
> > +		dev_err(&pdev->dev, "regmap init failed\n");
> > +		return PTR_ERR(fsl_dev->tcon_regmap);
> > +	}
> > +
> > +	regmap_write(fsl_dev->tcon_regmap, TCON_CTRL1, TCON_BYPASS_ENABLE);
> > +	return 0;
> > +}
> > +
> > +static int fsl_dcu_scfg_config(struct fsl_dcu_drm_device *fsl_dev,
> > +			       struct device_node *np)
> > +{
> > +	struct device_node *scfg_np;
> > +	struct platform_device *pdev;
> > +	struct resource *res;
> > +	void __iomem *base;
> > +
> > +	scfg_np = of_parse_phandle(np, "scfg-controller", 0);
> > +	if (!scfg_np)
> > +		return 0;
> > +
> > +	pdev = of_find_device_by_node(scfg_np);
> > +	if (!pdev)
> > +		return -EINVAL;
> > +
> > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +	if (!res)
> > +		return -ENODEV;
> > +
> > +	base = devm_ioremap_resource(&pdev->dev, res);
> > +	if (IS_ERR(base))
> > +		return PTR_ERR(base);
> > +
> > +	fsl_dev->scfg_regmap = devm_regmap_init_mmio_clk(&pdev->dev,
> > +			NULL, base, &fsl_dcu_regmap_config);
> > +	if (IS_ERR(fsl_dev->scfg_regmap)) {
> > +		dev_err(&pdev->dev, "regmap init failed\n");
> > +		return PTR_ERR(fsl_dev->scfg_regmap);
> > +	}
> > +
> > +	regmap_write(fsl_dev->scfg_regmap, 0x28, 0x80000000);
> 
> What does this actually do? I don't think this exists in Vybrid, but I
> guess we could easily make the property optional which would then not call
> this function...
> 
> --
> Stefan
> 
> > +
> > +	return 0;
> > +}
> > +
> > +static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
> > +{
> > +	struct platform_device *pdev = dev->platformdev;
> > +	struct fsl_dcu_drm_device *fsl_dev;
> > +	struct resource *res;
> > +	void __iomem *base;
> > +	int ret;
> > +
> > +	fsl_dev = devm_kzalloc(&pdev->dev, sizeof(*fsl_dev), GFP_KERNEL);
> > +	if (!fsl_dev)
> > +		return -ENOMEM;
> > +
> > +	fsl_dev->dev = &pdev->dev;
> > +	fsl_dev->ddev = dev;
> > +	dev->dev_private = fsl_dev;
> > +
> > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +	base = devm_ioremap_resource(&pdev->dev, res);
> > +	if (IS_ERR(base)) {
> > +		ret = PTR_ERR(base);
> > +		return ret;
> > +	}
> > +
> > +	fsl_dev->regmap = devm_regmap_init_mmio(&pdev->dev,
> > +			base, &fsl_dcu_regmap_config);
> > +	if (IS_ERR(fsl_dev->regmap)) {
> > +		dev_err(&pdev->dev, "regmap init failed\n");
> > +		return PTR_ERR(fsl_dev->regmap);
> > +	}
> > +
> > +	ret = fsl_dcu_drm_modeset_init(fsl_dev);
> > +	if (ret < 0) {
> > +		dev_err(&pdev->dev, "failed to initialize mode setting\n");
> > +		return ret;
> > +	}
> > +
> > +	ret = drm_vblank_init(dev, 1);
> > +	if (ret < 0) {
> > +		dev_err(&pdev->dev, "failed to initialize vblank\n");
> > +		goto done;
> > +	}
> > +
> > +	ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
> > +	if (ret < 0) {
> > +		dev_err(&pdev->dev, "failed to install IRQ handler\n");
> > +		goto done;
> > +	}
> > +
> > +	/* Put TCON in bypass mode, so the input signals from DCU are passed
> > +	 * through TCON unchanged */
> > +	fsl_dcu_bypass_tcon(fsl_dev, pdev->dev.of_node);
> > +	fsl_dcu_scfg_config(fsl_dev, pdev->dev.of_node);
> > +
> > +	fsl_dev->clk = devm_clk_get(&pdev->dev, "dcfb");
> > +	if (IS_ERR(fsl_dev->clk)) {
> > +		ret = PTR_ERR(fsl_dev->clk);
> > +		dev_err(&pdev->dev, "could not get clock\n");
> > +		return ret;
> > +	}
> > +	clk_prepare_enable(fsl_dev->clk);
> > +
> > +	dev_set_drvdata(dev->dev, fsl_dev);
> > +
> > +	fsl_dcu_fbdev_init(dev);
> > +
> > +	return 0;
> > +done:
> > +	if (ret)
> > +		fsl_dcu_unload(dev);
> > +
> > +	return ret;
> > +}
> > +
> > +static void fsl_dcu_drm_preclose(struct drm_device *dev, struct
> > +drm_file *file) {
> > +	;
> > +}
> > +
> > +static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg) {
> > +	return IRQ_HANDLED;
> > +}
> > +
> > +static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, int
> > +crtc) {
> > +	return 0;
> > +}
> > +
> > +static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, int
> > +crtc) {
> > +	;
> > +}
> > +
> > +static const struct file_operations fsl_dcu_drm_fops = {
> > +	.owner		= THIS_MODULE,
> > +	.open		= drm_open,
> > +	.release	= drm_release,
> > +	.unlocked_ioctl	= drm_ioctl,
> > +#ifdef CONFIG_COMPAT
> > +	.compat_ioctl	= drm_compat_ioctl,
> > +#endif
> > +	.poll		= drm_poll,
> > +	.read		= drm_read,
> > +	.llseek		= no_llseek,
> > +	.mmap		= drm_gem_cma_mmap,
> > +};
> > +
> > +static struct drm_driver fsl_dcu_drm_driver = {
> > +	.driver_features	= DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
> > +				| DRIVER_PRIME,
> > +	.load			= fsl_dcu_load,
> > +	.unload			= fsl_dcu_unload,
> > +	.preclose		= fsl_dcu_drm_preclose,
> > +	.irq_handler		= fsl_dcu_drm_irq,
> > +	.get_vblank_counter	= drm_vblank_count,
> > +	.enable_vblank		= fsl_dcu_drm_enable_vblank,
> > +	.disable_vblank		= fsl_dcu_drm_disable_vblank,
> > +	.gem_free_object	= drm_gem_cma_free_object,
> > +	.gem_vm_ops		= &drm_gem_cma_vm_ops,
> > +	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
> > +	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
> > +	.gem_prime_import	= drm_gem_prime_import,
> > +	.gem_prime_export	= drm_gem_prime_export,
> > +	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
> > +	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
> > +	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
> > +	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
> > +	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
> > +	.dumb_create		= drm_gem_cma_dumb_create,
> > +	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
> > +	.dumb_destroy		= drm_gem_dumb_destroy,
> > +	.fops			= &fsl_dcu_drm_fops,
> > +	.name			= "fsl-dcu-drm",
> > +	.desc			= "Freescale DCU DRM",
> > +	.date			= "20150213",
> > +	.major			= 1,
> > +	.minor			= 0,
> > +};
> > +
> > +#ifdef CONFIG_PM_SLEEP
> > +static int fsl_dcu_drm_pm_suspend(struct device *dev) {
> > +	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
> > +
> > +	drm_kms_helper_poll_disable(fsl_dev->ddev);
> > +	fsl_dcu_drm_crtc_suspend(&fsl_dev->crtc);
> > +
> > +	return 0;
> > +}
> > +
> > +static int fsl_dcu_drm_pm_resume(struct device *dev) {
> > +	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
> > +
> > +	drm_modeset_lock_all(fsl_dev->ddev);
> > +	fsl_dcu_drm_crtc_resume(&fsl_dev->crtc);
> > +	drm_modeset_unlock_all(fsl_dev->ddev);
> > +
> > +	drm_kms_helper_poll_enable(fsl_dev->ddev);
> > +	return 0;
> > +}
> > +#endif
> > +
> > +static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
> > +	SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend,
> > +fsl_dcu_drm_pm_resume) };
> > +
> > +static int fsl_dcu_drm_probe(struct platform_device *pdev) {
> > +	return drm_platform_init(&fsl_dcu_drm_driver, pdev); }
> > +
> > +static int fsl_dcu_drm_remove(struct platform_device *pdev) {
> > +	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
> > +
> > +	drm_put_dev(fsl_dev->ddev);
> > +
> > +	return 0;
> > +}
> > +
> > +static struct of_device_id fsl_dcu_of_match[] = {
> > +		{ .compatible = "fsl,ls1021a-dcfb", },
> > +		{ },
> > +};
> > +MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
> > +
> > +static struct platform_driver fsl_dcu_drm_platform_driver = {
> > +	.probe		= fsl_dcu_drm_probe,
> > +	.remove		= fsl_dcu_drm_remove,
> > +	.driver		= {
> > +		.owner	= THIS_MODULE,
> > +		.name	= "fsl,ls1021a-dcfb",
> > +		.pm	= &fsl_dcu_drm_pm_ops,
> > +		.of_match_table = fsl_dcu_of_match,
> > +	},
> > +};
> > +
> > +module_platform_driver(fsl_dcu_drm_platform_driver);
> > +
> > +MODULE_ALIAS("platform:fsl-dcu-drm");
> > +MODULE_DESCRIPTION("Freescale DCU DRM Driver");
> > +MODULE_LICENSE("GPL");
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_drv.h
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_drv.h
> > new file mode 100644
> > index 0000000..8dc7c10
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_drv.h
> > @@ -0,0 +1,167 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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.
> > + */
> > +
> > +#ifndef __FSL_DCU_DRM_DRV_H__
> > +#define __FSL_DCU_DRM_DRV_H__
> > +
> > +#include <linux/kernel.h>
> > +#include <linux/spinlock.h>
> > +#include <stddef.h>
> > +#include <drm/drm.h>
> > +#include <drm/drmP.h>
> > +#include <drm/drm_fb_helper.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_gem_cma_helper.h>
> > +#include <drm/drm_fb_cma_helper.h>
> > +
> > +#include "fsl_dcu_drm_crtc.h"
> > +#define DRIVER_NAME			"fsl-dcu-fb"
> > +
> > +#define DCU_DCU_MODE			0x0010
> > +#define DCU_MODE_BLEND_ITER(x)		((x) << 20)
> > +#define DCU_MODE_RASTER_EN		BIT(14)
> > +#define DCU_MODE_DCU_MODE(x)		(x)
> > +#define DCU_MODE_DCU_MODE_MASK		0x03
> > +#define DCU_MODE_OFF			0
> > +#define DCU_MODE_NORMAL			1
> > +#define DCU_MODE_TEST			2
> > +#define DCU_MODE_COLORBAR		3
> > +
> > +#define DCU_BGND			0x0014
> > +#define DCU_BGND_R(x)			((x) << 16)
> > +#define DCU_BGND_G(x)			((x) << 8)
> > +#define DCU_BGND_B(x)			(x)
> > +
> > +#define DCU_DISP_SIZE			0x0018
> > +#define DCU_DISP_SIZE_DELTA_Y(x)	((x) << 16)
> > +/*Regisiter value 1/16 of horizontal resolution*/
> > +#define DCU_DISP_SIZE_DELTA_X(x)	((x) >> 4)
> > +
> > +#define DCU_HSYN_PARA			0x001c
> > +#define DCU_HSYN_PARA_BP(x)		((x) << 22)
> > +#define DCU_HSYN_PARA_PW(x)		((x) << 11)
> > +#define DCU_HSYN_PARA_FP(x)		(x)
> > +
> > +#define DCU_VSYN_PARA			0x0020
> > +#define DCU_VSYN_PARA_BP(x)		((x) << 22)
> > +#define DCU_VSYN_PARA_PW(x)		((x) << 11)
> > +#define DCU_VSYN_PARA_FP(x)		(x)
> > +
> > +#define DCU_SYN_POL			0x0024
> > +#define DCU_SYN_POL_INV_PXCK_FALL	(0 << 6)
> > +#define DCU_SYN_POL_NEG_REMAIN		(0 << 5)
> > +#define DCU_SYN_POL_INV_VS_LOW		BIT(1)
> > +#define DCU_SYN_POL_INV_HS_LOW		(1)
> > +
> > +#define DCU_THRESHOLD			0x0028
> > +#define DCU_THRESHOLD_LS_BF_VS(x)	((x) << 16)
> > +#define DCU_THRESHOLD_OUT_BUF_HIGH(x)	((x) << 8)
> > +#define DCU_THRESHOLD_OUT_BUF_LOW(x)	(x)
> > +#define BF_VS_VAL			0x03
> > +#define BUF_MAX_VAL			0x78
> > +#define BUF_MIN_VAL			0x0a
> > +
> > +#define DCU_INT_STATUS			0x002C
> > +#define DCU_INT_STATUS_UNDRUN		BIT(1)
> > +
> > +#define DCU_INT_MASK			0x0030
> > +#define DCU_INT_MASK_UNDRUN		BIT(1)
> > +#define DCU_INT_MASK_VBLANK		BIT(3)
> > +
> > +#define DCU_DIV_RATIO			0x0054
> > +
> > +#define DCU_UPDATE_MODE			0x00cc
> > +#define DCU_UPDATE_MODE_MODE		BIT(31)
> > +#define DCU_UPDATE_MODE_READREG		BIT(30)
> > +
> > +#define DCU_DCFB_MAX			0x300
> > +
> > +#define DCU_CTRLDESCLN_1(x)		(0x200 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_1_HEIGHT(x)	((x) << 16)
> > +#define DCU_CTRLDESCLN_1_WIDTH(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_2(x)		(0x204 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_2_POSY(x)	((x) << 16)
> > +#define DCU_CTRLDESCLN_2_POSX(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_3(x)		(0x208 + (x) * 0x40)
> > +
> > +#define DCU_CTRLDESCLN_4(x)		(0x20c + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_4_EN		BIT(31)
> > +#define DCU_CTRLDESCLN_4_TILE_EN	BIT(30)
> > +#define DCU_CTRLDESCLN_4_DATA_SEL_CLUT	BIT(29)
> > +#define DCU_CTRLDESCLN_4_SAFETY_EN	BIT(28)
> > +#define DCU_CTRLDESCLN_4_TRANS(x)	((x) << 20)
> > +#define DCU_CTRLDESCLN_4_BPP(x)		((x) << 16)
> > +#define DCU_CTRLDESCLN_4_RLE_EN		BIT(15)
> > +#define DCU_CTRLDESCLN_4_LUOFFS(x)	((x) << 4)
> > +#define DCU_CTRLDESCLN_4_BB_ON		BIT(2)
> > +#define DCU_CTRLDESCLN_4_AB(x)		(x)
> > +
> > +#define DCU_CTRLDESCLN_5(x)		(0x210 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_5_CKMAX_R(x)	((x) << 16)
> > +#define DCU_CTRLDESCLN_5_CKMAX_G(x)	((x) << 8)
> > +#define DCU_CTRLDESCLN_5_CKMAX_B(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_6(x)		(0x214 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_6_CKMIN_R(x)	((x) << 16)
> > +#define DCU_CTRLDESCLN_6_CKMIN_G(x)	((x) << 8)
> > +#define DCU_CTRLDESCLN_6_CKMIN_B(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_7(x)		(0x218 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_7_TILE_VER(x)	((x) << 16)
> > +#define DCU_CTRLDESCLN_7_TILE_HOR(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_8(x)		(0x21c + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_8_FG_FCOLOR(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_9(x)		(0x220 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_9_BG_BCOLOR(x)	(x)
> > +
> > +#define DCU_CTRLDESCLN_10(x)		(0x224 + (x) * 0x40)
> > +#define DCU_CTRLDESCLN_10_POST_SKIP(x)	((x) << 16)
> > +#define DCU_CTRLDESCLN_10_PRE_SKIP(x)	(x)
> > +
> > +#define FSL_DCU_RGB565			4
> > +#define FSL_DCU_RGB888			5
> > +#define FSL_DCU_ARGB8888		6
> > +#define FSL_DCU_ARGB1555		11
> > +#define FSL_DCU_ARGB4444		12
> > +#define FSL_DCU_YUV422			14
> > +
> > +#define TCON_CTRL1			0x0000
> > +#define TCON_BYPASS_ENABLE		BIT(29)
> > +
> > +#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
> > +
> > +struct clk;
> > +struct device;
> > +struct drm_device;
> > +
> > +struct fsl_dcu_drm_device {
> > +	struct device *dev;
> > +	struct regmap *regmap;
> > +	struct regmap *tcon_regmap;
> > +	struct regmap *scfg_regmap;
> > +	unsigned int irq;
> > +	struct clk *clk;
> > +	/*protects hardware register*/
> > +	spinlock_t irq_lock;
> > +	struct drm_device *ddev;
> > +	struct drm_fbdev_cma *fbdev;
> > +	struct fsl_dcu_drm_crtc crtc;
> > +	struct fsl_dcu_drm_encoder encoder;
> > +	struct fsl_dcu_drm_connector connector; };
> > +
> > +void fsl_dcu_fbdev_init(struct drm_device *dev);
> > +
> > +#endif /* __FSL_DCU_DRM_DRV_H__ */
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_fbdev.c
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_fbdev.c
> > new file mode 100644
> > index 0000000..6729f92
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_fbdev.c
> > @@ -0,0 +1,43 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * This program is free software; you can redistribute it and/or
> > +modify it
> > + * under the terms of the GNU General Public License version 2 as
> > +published by
> > + * the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > +but WITHOUT
> > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
> > +or
> > + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
> > +License for
> > + * more details.
> > + *
> > + */
> > +
> > +#include <drm/drmP.h>
> > +#include <drm/drm_crtc.h>
> > +#include <drm/drm_fb_helper.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_fb_cma_helper.h>
> > +#include <drm/drm_gem_cma_helper.h>
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/dma-mapping.h>
> > +#include <linux/fb.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/of_platform.h>
> > +#include <linux/regmap.h>
> > +#include <video/of_display_timing.h>
> > +#include <video/videomode.h>
> > +#include <linux/uaccess.h>
> > +
> > +#include "fsl_dcu_drm_drv.h"
> > +#include "fsl_dcu_drm_crtc.h"
> > +
> > +/* initialize fbdev helper */
> > +void fsl_dcu_fbdev_init(struct drm_device *dev) {
> > +	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev->dev);
> > +
> > +	fsl_dev->fbdev = drm_fbdev_cma_init(dev, 24, 1, 1); }
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_kms.c
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_kms.c
> > new file mode 100644
> > index 0000000..0eb0652
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_kms.c
> > @@ -0,0 +1,45 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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/drm_crtc.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_fb_cma_helper.h>
> > +#include <drm/drm_gem_cma_helper.h>
> > +
> > +#include "fsl_dcu_drm_crtc.h"
> > +#include "fsl_dcu_drm_drv.h"
> > +#include "fsl_dcu_drm_kms.h"
> > +
> > +static const struct drm_mode_config_funcs fsl_dcu_drm_mode_config_funcs
> = {
> > +	.fb_create = drm_fb_cma_create,
> > +};
> > +
> > +int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev) {
> > +	drm_mode_config_init(fsl_dev->ddev);
> > +
> > +	fsl_dev->ddev->mode_config.min_width = 0;
> > +	fsl_dev->ddev->mode_config.min_height = 0;
> > +	fsl_dev->ddev->mode_config.max_width = 2031;
> > +	fsl_dev->ddev->mode_config.max_height = 2047;
> > +	fsl_dev->ddev->mode_config.funcs = &fsl_dcu_drm_mode_config_funcs;
> > +
> > +	fsl_dcu_drm_crtc_create(fsl_dev);
> > +	fsl_dcu_drm_encoder_create(fsl_dev);
> > +	fsl_dcu_drm_connector_create(fsl_dev, &fsl_dev->encoder.encoder);
> > +
> > +	drm_kms_helper_poll_init(fsl_dev->ddev);
> > +
> > +	drm_helper_disable_unused_functions(fsl_dev->ddev);
> > +
> > +	return 0;
> > +}
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_kms.h
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_kms.h
> > new file mode 100644
> > index 0000000..9d5b798
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_kms.h
> > @@ -0,0 +1,22 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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.
> > + */
> > +
> > +#ifndef __FSL_DCU_DRM_KMS_H__
> > +#define __FSL_DCU_DRM_KMS_H__
> > +
> > +#include <linux/types.h>
> > +
> > +struct drm_gem_cma_object;
> > +struct fsl_dcu_drm_device;
> > +
> > +int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev);
> > +
> > +#endif /* __FSL_DCU_DRM_KMS_H__ */
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_plane.c
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_plane.c
> > new file mode 100644
> > index 0000000..d725594
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_plane.c
> > @@ -0,0 +1,124 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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/drm_crtc.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_fb_cma_helper.h>
> > +#include <drm/drm_gem_cma_helper.h>
> > +#include <linux/regmap.h>
> > +
> > +#include "fsl_dcu_drm_drv.h"
> > +#include "fsl_dcu_drm_kms.h"
> > +#include "fsl_dcu_drm_plane.h"
> > +
> > +static void __fsl_dcu_drm_plane_setup(struct drm_plane *plane,
> > +				      struct drm_framebuffer *fb) {
> > +	struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
> > +	u32 plane_num = 0, alpha, bpp;
> > +	struct drm_gem_cma_object *gem;
> > +
> > +	while (plane->possible_crtcs >> 1)
> > +		plane_num++;
> > +
> > +	gem = drm_fb_cma_get_gem_obj(fb, 0);
> > +
> > +	switch (fb->pixel_format) {
> > +	case DRM_FORMAT_RGB565:
> > +		bpp = FSL_DCU_RGB565;
> > +		alpha = 0xff;
> > +		break;
> > +	case DRM_FORMAT_RGB888:
> > +		bpp = FSL_DCU_RGB888;
> > +		alpha = 0xff;
> > +		break;
> > +	case DRM_FORMAT_ARGB8888:
> > +		bpp = FSL_DCU_ARGB8888;
> > +		alpha = 0xff;
> > +		break;
> > +	case DRM_FORMAT_BGRA4444:
> > +		bpp = FSL_DCU_ARGB4444;
> > +		alpha = 0xff;
> > +		break;
> > +	case DRM_FORMAT_ARGB1555:
> > +		bpp = FSL_DCU_ARGB1555;
> > +		alpha = 0xff;
> > +		break;
> > +	case DRM_FORMAT_YUV422:
> > +		bpp = FSL_DCU_YUV422;
> > +		alpha = 0xff;
> > +		break;
> > +	default:
> > +		return;
> > +	}
> > +
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_3(plane_num), gem-
> >paddr);
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_4(plane_num),
> > +		     DCU_CTRLDESCLN_4_EN |
> > +		     DCU_CTRLDESCLN_4_TRANS(alpha) |
> > +		     DCU_CTRLDESCLN_4_BPP(bpp) |
> > +		     DCU_CTRLDESCLN_4_AB(2));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_5(plane_num),
> > +		     DCU_CTRLDESCLN_5_CKMAX_R(0xFF) |
> > +		     DCU_CTRLDESCLN_5_CKMAX_G(0xFF) |
> > +		     DCU_CTRLDESCLN_5_CKMAX_B(0xFF));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_6(plane_num),
> > +		     DCU_CTRLDESCLN_6_CKMIN_R(0) |
> > +		     DCU_CTRLDESCLN_6_CKMIN_G(0) |
> > +		     DCU_CTRLDESCLN_6_CKMIN_B(0));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_8(plane_num),
> > +		     DCU_CTRLDESCLN_8_FG_FCOLOR(0));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_9(plane_num),
> > +		     DCU_CTRLDESCLN_9_BG_BCOLOR(0));
> > +	regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN_10(plane_num),
> > +		     DCU_CTRLDESCLN_10_POST_SKIP(0) |
> > +		     DCU_CTRLDESCLN_10_PRE_SKIP(0));
> > +	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
> > +DCU_UPDATE_MODE_READREG); }
> > +
> > +void fsl_dcu_drm_plane_setup(struct drm_plane *plane) {
> > +	if (!plane->fb)
> > +		return;
> > +
> > +	__fsl_dcu_drm_plane_setup(plane, plane->fb); }
> > +
> > +int fsl_dcu_drm_plane_update(struct drm_plane *plane, struct drm_crtc
> *crtc,
> > +			     struct drm_framebuffer *fb, int crtc_x, int crtc_y,
> > +			    unsigned int crtc_w, unsigned int crtc_h,
> > +			    uint32_t src_x, uint32_t src_y,
> > +			    uint32_t src_w, uint32_t src_h) {
> > +	__fsl_dcu_drm_plane_setup(plane, fb);
> > +	return 0;
> > +}
> > +
> > +int fsl_dcu_drm_plane_disable(struct drm_plane *plane) {
> > +	return 0;
> > +}
> > +
> > +void fsl_dcu_drm_plane_destroy(struct drm_plane *plane) {
> > +	fsl_dcu_drm_plane_disable(plane);
> > +	drm_plane_cleanup(plane);
> > +}
> > +
> > +static const uint32_t formats[] = {
> > +	DRM_FORMAT_RGB565,
> > +	DRM_FORMAT_RGB888,
> > +	DRM_FORMAT_ARGB8888,
> > +	DRM_FORMAT_ARGB4444,
> > +	DRM_FORMAT_ARGB1555,
> > +	DRM_FORMAT_YUV422,
> > +};
> > diff --git a/drivers/gpu/drm/fsl/fsl_dcu_drm_plane.h
> > b/drivers/gpu/drm/fsl/fsl_dcu_drm_plane.h
> > new file mode 100644
> > index 0000000..da88d1c
> > --- /dev/null
> > +++ b/drivers/gpu/drm/fsl/fsl_dcu_drm_plane.h
> > @@ -0,0 +1,28 @@
> > +/*
> > + * Copyright 2015 Freescale Semiconductor, Inc.
> > + *
> > + * Freescale DCU drm device driver
> > + *
> > + * 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.
> > + */
> > +
> > +#ifndef __FSL_DCU_DRM_PLANE_H__
> > +#define __FSL_DCU_DRM_PLANE_H__
> > +
> > +struct fsl_dcu_drm_device;
> > +
> > +void fsl_dcu_drm_plane_setup(struct drm_plane *plane); int
> > +fsl_dcu_drm_plane_update(struct drm_plane *plane,
> > +			     struct drm_crtc *crtc,
> > +			     struct drm_framebuffer *fb,
> > +			     int crtc_x, int crtc_y,
> > +			     unsigned int crtc_w, unsigned int crtc_h,
> > +			     uint32_t src_x, uint32_t src_y,
> > +			     uint32_t src_w, uint32_t src_h); int
> > +fsl_dcu_drm_plane_disable(struct drm_plane *plane); void
> > +fsl_dcu_drm_plane_destroy(struct drm_plane *plane);
> > +
> > +#endif /* __FSL_DCU_DRM_PLANE_H__ */