mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-16 07:24:39 +08:00
71f56b2755
A specialisation of the generic Synopsys HDMI driver is employed for JZ4780 HDMI support. This requires a new driver, plus device tree and configuration modifications. Here we add Kconfig DRM_INGENIC_DW_HDMI, Makefile and driver code. Note that there is no hpd-gpio installed on the CI20 board HDMI connector. Hence there is no hpd detection by the connector driver and we have to enable polling in the dw-hdmi core driver. For that we need to set .poll_enabled but that struct component can only be accessed by core code. Hence we use the public setter function drm_kms_helper_hotplug_event() introduced before. Also note that we disable Color Space Conversion since it is not working on jz4780. Signed-off-by: Paul Boddie <paul@boddie.org.uk> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Paul Cercueil <paul@crapouillou.net> Link: https://patchwork.freedesktop.org/patch/msgid/e5cdf9cd44bde52cce379cc830f2d6117ea15c32.1649330171.git.hns@goldelico.com
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
|
|
* Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk>
|
|
*
|
|
* Derived from dw_hdmi-imx.c with i.MX portions removed.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <drm/bridge/dw_hdmi.h>
|
|
#include <drm/drm_of.h>
|
|
#include <drm/drm_print.h>
|
|
|
|
static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = {
|
|
{ 45250000, { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } },
|
|
{ 92500000, { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, 0x0005 } } },
|
|
{ 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, 0x000a } } },
|
|
{ 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, 0x000f } } },
|
|
{ ~0UL, { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, 0x0000 } } }
|
|
};
|
|
|
|
static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = {
|
|
/*pixelclk bpp8 bpp10 bpp12 */
|
|
{ 54000000, { 0x091c, 0x091c, 0x06dc } },
|
|
{ 58400000, { 0x091c, 0x06dc, 0x06dc } },
|
|
{ 72000000, { 0x06dc, 0x06dc, 0x091c } },
|
|
{ 74250000, { 0x06dc, 0x0b5c, 0x091c } },
|
|
{ 118800000, { 0x091c, 0x091c, 0x06dc } },
|
|
{ 216000000, { 0x06dc, 0x0b5c, 0x091c } },
|
|
{ ~0UL, { 0x0000, 0x0000, 0x0000 } },
|
|
};
|
|
|
|
/*
|
|
* Resistance term 133Ohm Cfg
|
|
* PREEMP config 0.00
|
|
* TX/CK level 10
|
|
*/
|
|
static const struct dw_hdmi_phy_config ingenic_phy_config[] = {
|
|
/*pixelclk symbol term vlev */
|
|
{ 216000000, 0x800d, 0x0005, 0x01ad},
|
|
{ ~0UL, 0x0000, 0x0000, 0x0000}
|
|
};
|
|
|
|
static enum drm_mode_status
|
|
ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
|
|
const struct drm_display_info *info,
|
|
const struct drm_display_mode *mode)
|
|
{
|
|
if (mode->clock < 13500)
|
|
return MODE_CLOCK_LOW;
|
|
/* FIXME: Hardware is capable of 270MHz, but setup data is missing. */
|
|
if (mode->clock > 216000)
|
|
return MODE_CLOCK_HIGH;
|
|
|
|
return MODE_OK;
|
|
}
|
|
|
|
static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = {
|
|
.mpll_cfg = ingenic_mpll_cfg,
|
|
.cur_ctr = ingenic_cur_ctr,
|
|
.phy_config = ingenic_phy_config,
|
|
.mode_valid = ingenic_dw_hdmi_mode_valid,
|
|
.output_port = 1,
|
|
};
|
|
|
|
static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = {
|
|
{ .compatible = "ingenic,jz4780-dw-hdmi" },
|
|
{ /* Sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids);
|
|
|
|
static void ingenic_dw_hdmi_cleanup(void *data)
|
|
{
|
|
struct dw_hdmi *hdmi = (struct dw_hdmi *)data;
|
|
|
|
dw_hdmi_remove(hdmi);
|
|
}
|
|
|
|
static int ingenic_dw_hdmi_probe(struct platform_device *pdev)
|
|
{
|
|
struct dw_hdmi *hdmi;
|
|
|
|
hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data);
|
|
if (IS_ERR(hdmi))
|
|
return PTR_ERR(hdmi);
|
|
|
|
return devm_add_action_or_reset(&pdev->dev, ingenic_dw_hdmi_cleanup, hdmi);
|
|
}
|
|
|
|
static struct platform_driver ingenic_dw_hdmi_driver = {
|
|
.probe = ingenic_dw_hdmi_probe,
|
|
.driver = {
|
|
.name = "dw-hdmi-ingenic",
|
|
.of_match_table = ingenic_dw_hdmi_dt_ids,
|
|
},
|
|
};
|
|
module_platform_driver(ingenic_dw_hdmi_driver);
|
|
|
|
MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:dw-hdmi-ingenic");
|