diff options
Diffstat (limited to 'meta-xilinx-contrib/recipes-kernel/linux/linux-xlnx/v2018.3/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch')
| -rw-r--r-- | meta-xilinx-contrib/recipes-kernel/linux/linux-xlnx/v2018.3/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/meta-xilinx-contrib/recipes-kernel/linux/linux-xlnx/v2018.3/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch b/meta-xilinx-contrib/recipes-kernel/linux/linux-xlnx/v2018.3/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch new file mode 100644 index 00000000..b8ba70ea --- /dev/null +++ b/meta-xilinx-contrib/recipes-kernel/linux/linux-xlnx/v2018.3/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch @@ -0,0 +1,302 @@ +From c1bf9e8c50baa237b514715dcb9c8fd367694c93 Mon Sep 17 00:00:00 2001 +From: Jason Wu <jason.wu.misc@gmail.com> +Date: Sun, 10 Apr 2016 13:14:13 +1000 +Subject: [PATCH 1/3] drm: xilinx: Add encoder for Digilent boards + +Add the dglnt_encoder driver that enables DRM support for the VGA and +HDMI output ports found on many Digilent boards. + +Upstream-Status: Pending + +Signed-off-by: Sam Bobrowicz <sbobrowicz@digilentinc.com> +Signed-off-by: Jason Wu <jason.wu.misc@gmail.com> +--- + .../bindings/drm/xilinx/dglnt_encoder.txt | 23 +++ + drivers/gpu/drm/xilinx/Kconfig | 6 + + drivers/gpu/drm/xilinx/Makefile | 1 + + drivers/gpu/drm/xilinx/dglnt_encoder.c | 217 +++++++++++++++++++++ + 4 files changed, 247 insertions(+) + create mode 100644 Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt + create mode 100644 drivers/gpu/drm/xilinx/dglnt_encoder.c + +diff --git a/Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt b/Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt +new file mode 100644 +index 0000000000..242b24e482 +--- /dev/null ++++ b/Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt +@@ -0,0 +1,23 @@ ++Device-Tree bindings for Digilent DRM Encoder Slave ++ ++This driver provides support for VGA and HDMI outputs on Digilent FPGA boards. ++The VGA or HDMI port must be connected to a Xilinx display pipeline via an ++axi2vid IP core. ++ ++Required properties: ++ - compatible: Should be "digilent,drm-encoder". ++ ++Optional properties: ++ - dglnt,edid-i2c: The I2C device connected to the DDC bus on the video ++ connector. This is used to obtain the supported resolutions ++ of an attached monitor. If not defined, then a default ++ set of resolutions is used and the display will initialize ++ to 720p. Note most VGA connectors on Digilent boards do ++ not have the DDC bus routed out. ++ ++Example: ++ ++ encoder_0: digilent_encoder { ++ compatible = "digilent,drm-encoder"; ++ dglnt,edid-i2c = <&i2c1>; ++ }; +diff --git a/drivers/gpu/drm/xilinx/Kconfig b/drivers/gpu/drm/xilinx/Kconfig +index 12b548c2a9..c3e2562e53 100644 +--- a/drivers/gpu/drm/xilinx/Kconfig ++++ b/drivers/gpu/drm/xilinx/Kconfig +@@ -57,3 +57,9 @@ config DRM_XILINX_SDI + depends on DRM_XILINX + help + DRM driver for Xilinx Display Port Subsystem. ++ ++config DRM_DIGILENT_ENCODER ++ tristate "Digilent VGA/HDMI DRM Encoder Driver" ++ depends on DRM_XILINX ++ help ++ DRM slave encoder for Video-out on Digilent boards. +diff --git a/drivers/gpu/drm/xilinx/Makefile b/drivers/gpu/drm/xilinx/Makefile +index 19bc1541ca..c2717e40ea 100644 +--- a/drivers/gpu/drm/xilinx/Makefile ++++ b/drivers/gpu/drm/xilinx/Makefile +@@ -7,6 +7,7 @@ xilinx_drm-y := xilinx_drm_crtc.o xilinx_drm_connector.o xilinx_drm_drv.o \ + xilinx_drm_plane.o + xilinx_drm-y += xilinx_cresample.o xilinx_osd.o xilinx_rgb2yuv.o xilinx_vtc.o + ++obj-$(CONFIG_DRM_DIGILENT_ENCODER) += dglnt_encoder.o + obj-$(CONFIG_DRM_XILINX) += xilinx_drm.o + obj-$(CONFIG_DRM_XILINX_DP) += xilinx_drm_dp.o + obj-$(CONFIG_DRM_XILINX_DP_SUB) += xilinx_drm_dp_sub.o +diff --git a/drivers/gpu/drm/xilinx/dglnt_encoder.c b/drivers/gpu/drm/xilinx/dglnt_encoder.c +new file mode 100644 +index 0000000000..26a23986f9 +--- /dev/null ++++ b/drivers/gpu/drm/xilinx/dglnt_encoder.c +@@ -0,0 +1,217 @@ ++/* ++ * dglnt_encoder.c - DRM slave encoder for Video-out on Digilent boards ++ * ++ * Copyright (C) 2015 Digilent ++ * Author: Sam Bobrowicz <sbobrowicz@digilentinc.com> ++ * ++ * Based on udl_encoder.c and udl_connector.c, Copyright (C) 2012 Red Hat. ++ * Also based on xilinx_drm_dp.c, Copyright (C) 2014 Xilinx, Inc. ++ * ++ * This software is licensed under the terms of the GNU General Public ++ * License version 2, as published by the Free Software Foundation, and ++ * may be copied, distributed, and modified under those terms. ++ * ++ * 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_edid.h> ++#include <drm/drm_encoder_slave.h> ++ ++#include <linux/device.h> ++#include <linux/module.h> ++#include <linux/err.h> ++#include <linux/i2c.h> ++#include <linux/of.h> ++#include <linux/of_platform.h> ++#include <linux/platform_device.h> ++ ++#define DGLNT_ENC_MAX_FREQ 150000 ++#define DGLNT_ENC_MAX_H 1920 ++#define DGLNT_ENC_MAX_V 1080 ++#define DGLNT_ENC_PREF_H 1280 ++#define DGLNT_ENC_PREF_V 720 ++ ++struct dglnt_encoder { ++ struct drm_encoder *encoder; ++ struct i2c_adapter *i2c_bus; ++ bool i2c_present; ++}; ++ ++static inline struct dglnt_encoder *to_dglnt_encoder( ++ struct drm_encoder *encoder) ++{ ++ return to_encoder_slave(encoder)->slave_priv; ++} ++ ++static bool dglnt_mode_fixup(struct drm_encoder *encoder, ++ const struct drm_display_mode *mode, ++ struct drm_display_mode *adjusted_mode) ++{ ++ return true; ++} ++ ++static void dglnt_encoder_mode_set(struct drm_encoder *encoder, ++ struct drm_display_mode *mode, ++ struct drm_display_mode *adjusted_mode) ++{ ++} ++ ++static void ++dglnt_encoder_dpms(struct drm_encoder *encoder, int mode) ++{ ++} ++ ++static void dglnt_encoder_save(struct drm_encoder *encoder) ++{ ++} ++ ++static void dglnt_encoder_restore(struct drm_encoder *encoder) ++{ ++} ++ ++static int dglnt_encoder_mode_valid(struct drm_encoder *encoder, ++ struct drm_display_mode *mode) ++{ ++ if (mode && ++ !(mode->flags & ((DRM_MODE_FLAG_INTERLACE | ++ DRM_MODE_FLAG_DBLCLK) | DRM_MODE_FLAG_3D_MASK)) && ++ (mode->clock <= DGLNT_ENC_MAX_FREQ) && ++ (mode->hdisplay <= DGLNT_ENC_MAX_H) && ++ (mode->vdisplay <= DGLNT_ENC_MAX_V)) ++ return MODE_OK; ++ return MODE_BAD; ++} ++ ++static int dglnt_encoder_get_modes(struct drm_encoder *encoder, ++ struct drm_connector *connector) ++{ ++ struct dglnt_encoder *dglnt = to_dglnt_encoder(encoder); ++ struct edid *edid; ++ int num_modes = 0; ++ ++ if (dglnt->i2c_present) { ++ edid = drm_get_edid(connector, dglnt->i2c_bus); ++ drm_mode_connector_update_edid_property(connector, edid); ++ if (edid) { ++ num_modes = drm_add_edid_modes(connector, edid); ++ kfree(edid); ++ } ++ } else { ++ num_modes = drm_add_modes_noedid(connector, DGLNT_ENC_MAX_H, ++ DGLNT_ENC_MAX_V); ++ drm_set_preferred_mode(connector, DGLNT_ENC_PREF_H, ++ DGLNT_ENC_PREF_V); ++ } ++ return num_modes; ++} ++ ++static enum drm_connector_status dglnt_encoder_detect( ++ struct drm_encoder *encoder, ++ struct drm_connector *connector) ++{ ++ struct dglnt_encoder *dglnt = to_dglnt_encoder(encoder); ++ ++ if (dglnt->i2c_present) { ++ if (drm_probe_ddc(dglnt->i2c_bus)) ++ return connector_status_connected; ++ return connector_status_disconnected; ++ } else ++ return connector_status_unknown; ++} ++ ++static struct drm_encoder_slave_funcs dglnt_encoder_slave_funcs = { ++ .dpms = dglnt_encoder_dpms, ++ .save = dglnt_encoder_save, ++ .restore = dglnt_encoder_restore, ++ .mode_fixup = dglnt_mode_fixup, ++ .mode_valid = dglnt_encoder_mode_valid, ++ .mode_set = dglnt_encoder_mode_set, ++ .detect = dglnt_encoder_detect, ++ .get_modes = dglnt_encoder_get_modes, ++}; ++ ++static int dglnt_encoder_encoder_init(struct platform_device *pdev, ++ struct drm_device *dev, ++ struct drm_encoder_slave *encoder) ++{ ++ struct dglnt_encoder *dglnt = platform_get_drvdata(pdev); ++ struct device_node *sub_node; ++ ++ encoder->slave_priv = dglnt; ++ encoder->slave_funcs = &dglnt_encoder_slave_funcs; ++ ++ dglnt->encoder = &encoder->base; ++ ++ /* get i2c adapter for edid */ ++ dglnt->i2c_present = false; ++ sub_node = of_parse_phandle(pdev->dev.of_node, "dglnt,edid-i2c", 0); ++ if (sub_node) { ++ dglnt->i2c_bus = of_find_i2c_adapter_by_node(sub_node); ++ if (!dglnt->i2c_bus) ++ DRM_INFO("failed to get the edid i2c adapter, using default modes\n"); ++ else ++ dglnt->i2c_present = true; ++ of_node_put(sub_node); ++ } ++ ++ return 0; ++} ++ ++static int dglnt_encoder_probe(struct platform_device *pdev) ++{ ++ struct dglnt_encoder *dglnt; ++ ++ dglnt = devm_kzalloc(&pdev->dev, sizeof(*dglnt), GFP_KERNEL); ++ if (!dglnt) ++ return -ENOMEM; ++ ++ platform_set_drvdata(pdev, dglnt); ++ ++ return 0; ++} ++ ++static int dglnt_encoder_remove(struct platform_device *pdev) ++{ ++ return 0; ++} ++ ++static const struct of_device_id dglnt_encoder_of_match[] = { ++ { .compatible = "digilent,drm-encoder", }, ++ { /* end of table */ }, ++}; ++MODULE_DEVICE_TABLE(of, dglnt_encoder_of_match); ++ ++static struct drm_platform_encoder_driver dglnt_encoder_driver = { ++ .platform_driver = { ++ .probe = dglnt_encoder_probe, ++ .remove = dglnt_encoder_remove, ++ .driver = { ++ .owner = THIS_MODULE, ++ .name = "dglnt-drm-enc", ++ .of_match_table = dglnt_encoder_of_match, ++ }, ++ }, ++ ++ .encoder_init = dglnt_encoder_encoder_init, ++}; ++ ++static int __init dglnt_encoder_init(void) ++{ ++ return platform_driver_register(&dglnt_encoder_driver.platform_driver); ++} ++ ++static void __exit dglnt_encoder_exit(void) ++{ ++ platform_driver_unregister(&dglnt_encoder_driver.platform_driver); ++} ++ ++module_init(dglnt_encoder_init); ++module_exit(dglnt_encoder_exit); ++ ++MODULE_AUTHOR("Digilent, Inc."); ++MODULE_DESCRIPTION("DRM slave encoder for Video-out on Digilent boards"); ++MODULE_LICENSE("GPL v2"); +-- +2.14.2 + |