On Tue, Aug 14, 2018 at 04:57:07PM +0800, Hean-Loong, Ong wrote:

From: Ong, Hean Loong hean.loong.ong@intel.com

Device tree binding for Intel FPGA Video and Image Processing Suite. The binding involved would be generated from the Altera (Intel) Qsys system. The bindings would set the max width, max height, buts per pixel and memory port width. The device tree binding only supports the Intel Arria10 devkit and its variants. Vendor name retained as altr.

Again, wrap your lines.

V8: *Add port to Display port decoder

V7: *Fix OF graph for better description *Add description for encoder

V6: *Description have not describe DT device in general

V5: *remove bindings for bits per symbol as it has only one value which is 8

V4: *fix properties that does not describe the values

V3: *OF graph not in accordance to graph.txt

V2: *Remove Linux driver description

V1: *Missing vendor prefix

Signed-off-by: Ong, Hean Loong hean.loong.ong@intel.com

.../devicetree/bindings/display/altr,vip-fb2.txt | 63 ++++++++++++++++++++ 1 files changed, 63 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/altr,vip-fb2.txt

diff --git a/Documentation/devicetree/bindings/display/altr,vip-fb2.txt b/Documentation/devicetree/bindings/display/altr,vip-fb2.txt new file mode 100644 index 0000000..89a3b9e --- /dev/null +++ b/Documentation/devicetree/bindings/display/altr,vip-fb2.txt @@ -0,0 +1,63 @@ +Intel Video and Image Processing(VIP) Frame Buffer II bindings

+Supported hardware: Intel FPGA SoC Arria10 and above with display port IP

+The Video Frame Buffer II in Video Image Processing (VIP) suite is an IP core +that interfaces between system memory and Avalon-ST video ports. The IP core +can be configured to support the memory reader (from memory to Avalon-ST) +and/or memory writer (from Avalon-ST to memory) interfaces.

+More information the FPGA video IP component can be acquired from +https://www.altera.com/content/dam/altera-www/global/en_US/pdfs%5C +/literature/ug/ug_vip.pdf

+DT-Bindings: +============= +Required properties: +---------------------------- +- compatible: "altr,vip-frame-buffer-2.0" +- reg: Physical base address and length of the framebuffer controller's

• registers.

+- altr,max-width: The maximum width of the framebuffer in pixels. +- altr,max-height: The maximum height of the framebuffer in pixels. +- altr,mem-port-width = the bus width of the avalon master port

• on the frame reader

+Optional sub-nodes: +- ports: The connection to the encoder

+Connections between the Frame Buffer II and other video IP cores in the system +are modelled using the OF graph DT bindings. The Frame Buffer II node has up +to two OF graph ports. When the memory writer interface is enabled, port 0 +maps to the Avalon-ST Input (din) port. When the memory reader interface is +enabled, port 1 maps to the Avalon-ST Output (dout) port.

+The encoder is built into the FPGA HW design and therefore would not +be accessible from the DDR.

• Port 0				Port1
  

+--------------------------------------------------------- +ARRIA10 AVALON_ST (DIN) AVALON_ST (DOUT)

+Required Properties Example: +----------------------------

+framebuffer@100000280 {

• compatible = "altr,vip-frame-buffer-2.0";
  

• reg = <0x00000001 0x00000280 0x00000040>;
  

• altr,max-width = <1280>;
  

• altr,max-height = <720>;
  

• altr,mem-port-width = <128>;
  

• ports {
  

• 		#address-cells = <1>;
  

• 		#size-cells = <0>;
  

• 	port@1 {
  

• 		reg = <1>;
  

• 			fb_output: endpoint {
  

• 				remote-endpoint = <&dp_encoder_input>;
  

• 			};
  

• 	};
  

• };
  

+};

1.7.1

On Wed, 2018-08-15 at 14:26 +0200, Noralf Trønnes wrote:

Den 14.08.2018 10.57, skrev Hean-Loong, Ong:

...

From: Ong Hean Loong hean.loong.ong@intel.com

Driver for Intel FPGA Video and Image Processing Suite Frame Buffer II. The driver only supports the Intel Arria10 devkit and its variants. This driver can be either loaded staticlly or in modules. The OF device tree binding is located at: Documentation/devicetree/bindings/display/altr,vip-fb2.txt

Signed-off-by: Ong Hean Loong hean.loong.ong@intel.com

drivers/gpu/drm/Kconfig               |    2 +   drivers/gpu/drm/Makefile              |    1 +   drivers/gpu/drm/ivip/Kconfig          |   14 +++   drivers/gpu/drm/ivip/Makefile         |    9 ++   drivers/gpu/drm/ivip/intel_vip_conn.c |   95 ++++++++++++++++   drivers/gpu/drm/ivip/intel_vip_core.c |  161 +++++++++++++++++++++++++++   drivers/gpu/drm/ivip/intel_vip_drv.h  |   52 +++++++++   drivers/gpu/drm/ivip/intel_vip_of.c   |  193 +++++++++++++++++++++++++++++++++   8 files changed, 527 insertions(+), 0 deletions(-)   create mode 100644 drivers/gpu/drm/ivip/Kconfig   create mode 100644 drivers/gpu/drm/ivip/Makefile   create mode 100644 drivers/gpu/drm/ivip/intel_vip_conn.c   create mode 100644 drivers/gpu/drm/ivip/intel_vip_core.c   create mode 100644 drivers/gpu/drm/ivip/intel_vip_drv.h   create mode 100644 drivers/gpu/drm/ivip/intel_vip_of.c

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index cb88528..6b2845b 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -215,6 +215,8 @@ source "drivers/gpu/drm/nouveau/Kconfig"      source "drivers/gpu/drm/i915/Kconfig"    +source "drivers/gpu/drm/ivip/Kconfig"

config DRM_VGEM    tristate "Virtual GEM provider"    depends on DRM diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index a6771ce..57205d8 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_DRM_AMDGPU)+= amd/amdgpu/   obj-$(CONFIG_DRM_MGA) += mga/   obj-$(CONFIG_DRM_I810) += i810/   obj-$(CONFIG_DRM_I915) += i915/ +obj-$(CONFIG_DRM_IVIP) += ivip/   obj-$(CONFIG_DRM_MGAG200) += mgag200/   obj-$(CONFIG_DRM_V3D)  += v3d/   obj-$(CONFIG_DRM_VC4)  += vc4/ diff --git a/drivers/gpu/drm/ivip/Kconfig b/drivers/gpu/drm/ivip/Kconfig new file mode 100644 index 0000000..1d08b90 --- /dev/null +++ b/drivers/gpu/drm/ivip/Kconfig @@ -0,0 +1,14 @@ +config DRM_IVIP +        tristate "Intel FGPA Video and Image Processing" +        depends on DRM && OF +        select DRM_GEM_CMA_HELPER +        select DRM_KMS_HELPER +        select DRM_KMS_FB_HELPER +        select DRM_KMS_CMA_HELPER +        help

•   Choose this option if you have an Intel FPGA
  

Arria 10 system

•   and above with an Intel Display Port IP. This
  

does not support

•   legacy Intel FPGA Cyclone V display port.
  

Currently only single

•   frame buffer is supported. Note that ACPI and
  

X_86 architecture

•   is not supported for Arria10. If M is selected
  

the module will be

•   called ivip.
  

diff --git a/drivers/gpu/drm/ivip/Makefile b/drivers/gpu/drm/ivip/Makefile new file mode 100644 index 0000000..cc55b04 --- /dev/null +++ b/drivers/gpu/drm/ivip/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for the drm device driver.  This driver provides support for the +# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.

+ccflags-y := -Iinclude/drm

This shouldn't be necessary AFAIK.

...

+obj-$(CONFIG_DRM_IVIP) += ivip.o +ivip-objs := intel_vip_of.o intel_vip_core.o \

• intel_vip_conn.o

diff --git a/drivers/gpu/drm/ivip/intel_vip_conn.c b/drivers/gpu/drm/ivip/intel_vip_conn.c new file mode 100644 index 0000000..46bb04c --- /dev/null +++ b/drivers/gpu/drm/ivip/intel_vip_conn.c @@ -0,0 +1,95 @@

Please add an SPDX indentifier at the top of your files and you can drop the license text.

Header files use this: /* SPDX-License-Identifier: GPL-2.0 */

C-files uses c++ comment due to reasons: // SPDX-License-Identifier: GPL-2.0

...

+/*

• • intel_vip_conn.c -- Intel Video and Image Processing(VIP)
• • Frame Buffer II driver
• • This driver supports the Intel VIP Frame Reader component.
• • More info on the hardware can be found in the Intel Video
• • and Image Processing Suite User Guide at this address
• • http://www.altera.com/literature/ug/ug_vip.pdf.
• • This program is free software; you can redistribute it and/or

modify it

• • under the terms and conditions of the GNU General Public

License,

• • version 2, as published by the Free Software Foundation.
• • This program is distributed in the hope 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.
• • Authors:
• • Ong, Hean-Loong hean.loong.ong@intel.com
• */

+#include <linux/init.h> +#include <linux/kernel.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_encoder_slave.h> +#include <drm/drm_plane_helper.h>

+static enum drm_connector_status +intelvipfb_drm_connector_detect(struct drm_connector *connector, bool force) +{

• return connector_status_connected;

+}

+static void intelvipfb_drm_connector_destroy(struct drm_connector *connector) +{

• drm_connector_unregister(connector);
• drm_connector_cleanup(connector);

+}

+static const struct drm_connector_funcs intelvipfb_drm_connector_funcs = {

• .reset = drm_atomic_helper_connector_reset,
• .detect = intelvipfb_drm_connector_detect,
• .fill_modes = drm_helper_probe_single_connector_modes,
• .destroy = intelvipfb_drm_connector_destroy,
• .atomic_destroy_state =

drm_atomic_helper_connector_destroy_state, +};

+static int intelvipfb_drm_connector_get_modes(struct drm_connector *connector) +{

• struct drm_device *drm = connector->dev;
• int count;
• count = drm_add_modes_noedid(connector, drm-

...

mode_config.max_width,

• 		     drm->mode_config.max_height);
  

• drm_set_preferred_mode(connector, drm-

...

mode_config.max_width,

• 	       drm->mode_config.max_height);
  

• return count;

+}

+static const struct drm_connector_helper_funcs +intelvipfb_drm_connector_helper_funcs = {

• .get_modes = intelvipfb_drm_connector_get_modes,

+};

+struct drm_connector * +intelvipfb_conn_setup(struct drm_device *drm) +{

• struct drm_connector *conn;
• int ret;
• conn = devm_kzalloc(drm->dev, sizeof(*conn), GFP_KERNEL);
• if (IS_ERR(conn))

• return NULL;
  

• ret = drm_connector_init(drm, conn,

&intelvipfb_drm_connector_funcs,

• 		 DRM_MODE_CONNECTOR_DisplayPort);
  

• if (ret < 0) {

• dev_err(drm->dev, "failed to initialize drm
  

connector\n");

• ret = -ENOMEM;
  

• goto error_connector_cleanup;
  

• }
• conn->polled = 0;

No need to set this, it is already zero from the allocation.

...

• drm_connector_helper_add(conn,

&intelvipfb_drm_connector_helper_funcs);

• return conn;

+error_connector_cleanup:

• drm_connector_cleanup(conn);
• return NULL;

+} diff --git a/drivers/gpu/drm/ivip/intel_vip_core.c b/drivers/gpu/drm/ivip/intel_vip_core.c new file mode 100644 index 0000000..b601bb4 --- /dev/null +++ b/drivers/gpu/drm/ivip/intel_vip_core.c @@ -0,0 +1,160 @@ +/*

• • intel_vip_core.c -- Intel Video and Image Processing(VIP)
• • Frame Buffer II driver
• • This driver supports the Intel VIP Frame Reader component.
• • More info on the hardware can be found in the Intel Video
• • and Image Processing Suite User Guide at this address
• • http://www.altera.com/literature/ug/ug_vip.pdf.
• • This program is free software; you can redistribute it and/or

modify it

• • under the terms and conditions of the GNU General Public

License,

• • version 2, as published by the Free Software Foundation.
• • This program is distributed in the hope 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.
• • Authors:
• • Ong, Hean-Loong hean.loong.ong@intel.com
• */

+#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_plane_helper.h> +#include <drm/drm_simple_kms_helper.h> +#include <drm/drm_gem_framebuffer_helper.h>

+#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h>

+#include "intel_vip_drv.h"

+static void intelvipfb_enable(struct drm_simple_display_pipe *pipe,

• 	      struct drm_crtc_state *crtc_state,
  

struct drm_plane_state *plane_state) +{

• /*
• * The frameinfo variable has to correspond to the size of

the VIP Suite

• * Frame Reader register 7 which will determine the

maximum size used

• * in this frameinfo
• */
• u32 frameinfo;
• struct intelvipfb_priv *priv = pipe->plane.dev-

...

dev_private;

• void __iomem *base = priv->base;
• struct drm_plane_state *state = pipe->plane.state;
• dma_addr_t addr;
• addr = drm_fb_cma_get_gem_addr(state->fb, state, 0);
• frameinfo =

• readl(base + INTELVIPFB_FRAME_READER) &
  

0x00ffffff;

• writel(frameinfo, base + INTELVIPFB_FRAME_INFO);
• writel(addr, base + INTELVIPFB_FRAME_START);
• /* Finally set the control register to 1 to start

streaming */

• writel(1, base + INTELVIPFB_CONTROL);

+}

+static void intelvipfb_disable(struct drm_simple_display_pipe *pipe) +{

• struct intelvipfb_priv *priv = pipe->plane.dev-

...

dev_private;

• void __iomem *base = priv->base;
• /* set the control register to 0 to stop streaming */
• writel(0, base + INTELVIPFB_CONTROL);

+}

+static const struct drm_mode_config_funcs intelvipfb_mode_config_funcs = {

• .fb_create = drm_gem_fb_create,
• .atomic_check = drm_atomic_helper_check,
• .atomic_commit = drm_atomic_helper_commit,

+};

+static void intelvipfb_setup_mode_config(struct drm_device *drm) +{

• drm_mode_config_init(drm);
• drm->mode_config.funcs = &intelvipfb_mode_config_funcs;

+}

+static int intelvipfb_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,

• 		      struct drm_plane_state
  

*plane_state) +{

• return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);

+}

+static struct drm_simple_display_pipe_funcs fbpriv_funcs = {

• .prepare_fb = intelvipfb_pipe_prepare_fb,

You can use drm_gem_fb_simple_display_pipe_prepare_fb(), no need to roll your own.

...

• .enable = intelvipfb_enable,
• .disable = intelvipfb_disable

+};

+int intelvipfb_probe(struct device *dev) +{

• int retval;
• struct drm_device *drm;
• struct intelvipfb_priv *fbpriv = dev_get_drvdata(dev);
• struct drm_connector *connector;
• u32 formats[] = {DRM_FORMAT_XRGB8888};
• drm = fbpriv->drm;
• drm->dev_private = fbpriv;
• intelvipfb_setup_mode_config(drm);
• connector = intelvipfb_conn_setup(drm);
• if (!connector) {

• dev_err(drm->dev, "Connector setup failed\n");
  

• goto err_mode_config;
  

• }
• retval = drm_simple_display_pipe_init(drm, &fbpriv->pipe,

• 			      &fbpriv_funcs,
  

formats,

• 	ARRAY_SIZE(formats), NULL, connector);
  

• if (retval < 0) {

• dev_err(drm->dev, "Cannot setup simple display
  

pipe\n");

• goto err_mode_config;
  

• }
• fbpriv->fbcma = drm_fbdev_cma_init(drm,

• 	drm->mode_config.preferred_depth,
  

• 	drm->mode_config.num_connector);
  

Please use drm_fbdev_generic_setup() for fbdev emulation. It tears down automatically on drm_dev_unregister() and you don't need the drm_driver->lastclose hook.

All drivers that use drm_fbdev_cma_init() will move to this shortly.

Noralf.

I could not find any examples that currently uses the drm_fbdev_generic_setup (). Would you mind pointing me on where such examples are available that would allow me to replace the assignment of the fbcma pointer with drm_fbdev_generic_setup() method

Thanks. Hean Loong.

...

• drm_mode_config_reset(drm);
• drm_dev_register(drm, 0);
• return retval;

+err_mode_config:

• drm_mode_config_cleanup(drm);
• return -ENODEV;

+}

+int intelvipfb_remove(struct device *dev) +{

• struct intelvipfb_priv *fbpriv = dev_get_drvdata(dev);
• struct drm_device *drm =  fbpriv->drm;
• drm_dev_unregister(drm);
• if (fbpriv->fbcma)

• drm_fbdev_cma_fini(fbpriv->fbcma);
  

• drm_mode_config_cleanup(drm);
• drm_dev_unref(drm);
• return 0;

+}

+MODULE_AUTHOR("Ong, Hean-Loong hean.loong.ong@intel.com"); +MODULE_DESCRIPTION("Intel VIP Frame Buffer II driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/ivip/intel_vip_drv.h b/drivers/gpu/drm/ivip/intel_vip_drv.h new file mode 100644 index 0000000..0a3555d --- /dev/null +++ b/drivers/gpu/drm/ivip/intel_vip_drv.h @@ -0,0 +1,52 @@ +/*

• • Copyright (C) 2017 Intel Corporation.
• • Intel Video and Image Processing(VIP) Frame Buffer II driver.
• • This program is free software; you can redistribute it and/or

modify it

• • under the terms and conditions of the GNU General Public

License,

• • version 2, as published by the Free Software Foundation.
• • This program is distributed in the hope 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.
• • You should have received a copy of the GNU General Public

License along with

• • this program.  If not, see http://www.gnu.org/licenses/.
• • Authors:
• • Ong, Hean-Loong hean.loong.ong@intel.com
• */

+#ifndef _INTEL_VIP_DRV_H +#define _INTEL_VIP_DRV_H

+#define DRIVER_NAME    "intelvipfb" +#define BYTES_PER_PIXEL  4 +#define CRTC_NUM         1 +#define CONN_NUM         1

+/* control registers */ +#define INTELVIPFB_CONTROL       0 +#define INTELVIPFB_STATUS        0x4 +#define INTELVIPFB_INTERRUPT     0x8 +#define INTELVIPFB_FRAME_COUNTER 0xC +#define INTELVIPFB_FRAME_DROP    0x10 +#define INTELVIPFB_FRAME_INFO    0x14 +#define INTELVIPFB_FRAME_START   0x18 +#define INTELVIPFB_FRAME_READER          0x1C

+int intelvipfb_probe(struct device *dev); +int intelvipfb_remove(struct device *dev); +int intelvipfb_setup_crtc(struct drm_device *drm); +struct drm_connector *intelvipfb_conn_setup(struct drm_device *drm);

+struct intelvipfb_priv {

• struct drm_simple_display_pipe pipe;
• struct drm_fbdev_cma *fbcma;
• struct drm_device *drm;
• void    __iomem *base;

+};

+#endif diff --git a/drivers/gpu/drm/ivip/intel_vip_of.c b/drivers/gpu/drm/ivip/intel_vip_of.c new file mode 100644 index 0000000..47302f9 --- /dev/null +++ b/drivers/gpu/drm/ivip/intel_vip_of.c @@ -0,0 +1,193 @@ +/*

• • intel_vip_of.c -- Intel Video and Image Processing(VIP)
• • Frame Buffer II driver
• • This driver supports the Intel VIP Frame Reader component.
• • More info on the hardware can be found in the Intel Video
• • and Image Processing Suite User Guide at this address
• • http://www.altera.com/literature/ug/ug_vip.pdf.
• • This program is free software; you can redistribute it and/or

modify it

• • under the terms and conditions of the GNU General Public

License,

• • version 2, as published by the Free Software Foundation.
• • This program is distributed in the hope 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.
• • Authors:
• • Ong, Hean-Loong hean.loong.ong@intel.com
• */

+#include <drm/drm_fb_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_of.h> +#include <drm/drm_simple_kms_helper.h>

+#include <linux/component.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h>

+#include "intel_vip_drv.h"

+DEFINE_DRM_GEM_CMA_FOPS(drm_fops);

+static void intelvipfb_lastclose(struct drm_device *drm) +{

• struct intelvipfb_priv *priv = drm->dev_private;
• drm_fbdev_cma_restore_mode(priv->fbcma);

+}

+static struct drm_driver intelvipfb_drm = {

• .driver_features =

• 	DRIVER_MODESET | DRIVER_GEM |
  

• 	DRIVER_PRIME | DRIVER_ATOMIC,
  

• .gem_free_object_unlocked = drm_gem_cma_free_object,
• .gem_vm_ops = &drm_gem_cma_vm_ops,
• .dumb_create = drm_gem_cma_dumb_create,
• .dumb_destroy = drm_gem_dumb_destroy,
• .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
• .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
• .gem_prime_export = drm_gem_prime_export,
• .gem_prime_import = drm_gem_prime_import,
• .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,
• .lastclose = intelvipfb_lastclose,
• .name = DRIVER_NAME,
• .date = "20170729",
• .desc = "Intel FPGA VIP SUITE",
• .major = 1,
• .minor = 0,
• .ioctls = NULL,
• .patchlevel = 0,
• .fops = &drm_fops,

+};

+/*

• • Setting up information derived from OF Device Tree Nodes
• • max-width, max-height, bits per pixel, memory port width
• */

+static int intelvipfb_drm_setup(struct device *dev,

• 		struct intelvipfb_priv *fbpriv)
  

+{

• struct drm_device *drm = fbpriv->drm;
• struct device_node *np = dev->of_node;
• int mem_word_width;
• int max_h, max_w;
• int ret;
• ret = of_property_read_u32(np, "altr,max-width", &max_w);
• if (ret) {

• dev_err(dev,
  

• 	"Missing required parameter 'altr,max-
  

width'");

• return ret;
  

• }
• ret = of_property_read_u32(np, "altr,max-height", &max_h);
• if (ret) {

• dev_err(dev,
  

• 	"Missing required parameter 'altr,max-
  

height'");

• return ret;
  

• }
• ret = of_property_read_u32(np, "altr,mem-port-width",

&mem_word_width);

• if (ret) {

• dev_err(dev, "Missing required parameter
  

'altr,mem-port-width '");

• return ret;
  

• }
• if (!(mem_word_width >= 32 && mem_word_width % 32 == 0)) {

• dev_err(dev,
  

• 	"mem-word-width is set to %i. must be >=
  

32 and multiple of 32.",

• 	 mem_word_width);
  

• return -ENODEV;
  

• }
• drm->mode_config.min_width = 640;
• drm->mode_config.min_height = 480;
• drm->mode_config.max_width = max_w;
• drm->mode_config.max_height = max_h;
• drm->mode_config.preferred_depth = 32;
• return 0;

+}

+static int intelvipfb_of_probe(struct platform_device *pdev) +{

• int retval;
• struct resource *reg_res;
• struct intelvipfb_priv *fbpriv;
• struct device *dev = &pdev->dev;
• struct drm_device *drm;
• fbpriv = devm_kzalloc(dev, sizeof(*fbpriv), GFP_KERNEL);
• if (!fbpriv)

• return -ENOMEM;
  

• /*setup DRM */
• drm = drm_dev_alloc(&intelvipfb_drm, dev);
• if (IS_ERR(drm))

• return PTR_ERR(drm);
  

• retval = dma_set_mask_and_coherent(drm->dev,

DMA_BIT_MASK(32));

• if (retval)

• return -ENODEV;
  

• fbpriv->drm = drm;
• reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
• if (!reg_res)

• return -ENOMEM;
  

• fbpriv->base = devm_ioremap_resource(dev, reg_res);
• if (IS_ERR(fbpriv->base)) {

• dev_err(dev, "devm_ioremap_resource failed\n");
  

• retval = PTR_ERR(fbpriv->base);
  

• return -ENOMEM;
  

• }
• intelvipfb_drm_setup(dev, fbpriv);
• dev_set_drvdata(dev, fbpriv);
• return intelvipfb_probe(dev);

+}

+static int intelvipfb_of_remove(struct platform_device *pdev) +{

• return intelvipfb_remove(&pdev->dev);

+}

+/*

• • The name vip-frame-buffer-2.0 is derived from
• • http://www.altera.com/literature/ug/ug_vip.pdf
• • frame buffer IP cores section 14
• */

+static const struct of_device_id intelvipfb_of_match[] = {

• { .compatible = "altr,vip-frame-buffer-2.0" },
• {},

+};

+MODULE_DEVICE_TABLE(of, intelvipfb_of_match);

+static struct platform_driver intelvipfb_driver = {

• .probe = intelvipfb_of_probe,
• .remove = intelvipfb_of_remove,
• .driver = {

• .name = DRIVER_NAME,
  

• .of_match_table = intelvipfb_of_match,
  

• },

+};

+module_platform_driver(intelvipfb_driver);