d0ec0a3e48
The A23's display pipeline is similar to the A33. Differences include: - Display backend supports larger layers, 8192x8192 instead of 2048x2048 - TCON has DMA input - There is no SAT module packed in the display backend Add support for the display pipeline and its components. As the MIPI DSI output device is not officially documented, and there are no A23 reference devices to test it, it is not covered by this patch. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190125032314.20915-7-wens@csie.org
124 lines
3 KiB
C
124 lines
3 KiB
C
/*
|
|
* Copyright (C) 2016 Free Electrons
|
|
*
|
|
* Maxime Ripard <maxime.ripard@free-electrons.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 <linux/clk.h>
|
|
#include <linux/component.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/reset.h>
|
|
|
|
struct sun6i_drc {
|
|
struct clk *bus_clk;
|
|
struct clk *mod_clk;
|
|
struct reset_control *reset;
|
|
};
|
|
|
|
static int sun6i_drc_bind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct sun6i_drc *drc;
|
|
int ret;
|
|
|
|
drc = devm_kzalloc(dev, sizeof(*drc), GFP_KERNEL);
|
|
if (!drc)
|
|
return -ENOMEM;
|
|
dev_set_drvdata(dev, drc);
|
|
|
|
drc->reset = devm_reset_control_get(dev, NULL);
|
|
if (IS_ERR(drc->reset)) {
|
|
dev_err(dev, "Couldn't get our reset line\n");
|
|
return PTR_ERR(drc->reset);
|
|
}
|
|
|
|
ret = reset_control_deassert(drc->reset);
|
|
if (ret) {
|
|
dev_err(dev, "Couldn't deassert our reset line\n");
|
|
return ret;
|
|
}
|
|
|
|
drc->bus_clk = devm_clk_get(dev, "ahb");
|
|
if (IS_ERR(drc->bus_clk)) {
|
|
dev_err(dev, "Couldn't get our bus clock\n");
|
|
ret = PTR_ERR(drc->bus_clk);
|
|
goto err_assert_reset;
|
|
}
|
|
clk_prepare_enable(drc->bus_clk);
|
|
|
|
drc->mod_clk = devm_clk_get(dev, "mod");
|
|
if (IS_ERR(drc->mod_clk)) {
|
|
dev_err(dev, "Couldn't get our mod clock\n");
|
|
ret = PTR_ERR(drc->mod_clk);
|
|
goto err_disable_bus_clk;
|
|
}
|
|
clk_prepare_enable(drc->mod_clk);
|
|
|
|
return 0;
|
|
|
|
err_disable_bus_clk:
|
|
clk_disable_unprepare(drc->bus_clk);
|
|
err_assert_reset:
|
|
reset_control_assert(drc->reset);
|
|
return ret;
|
|
}
|
|
|
|
static void sun6i_drc_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct sun6i_drc *drc = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(drc->mod_clk);
|
|
clk_disable_unprepare(drc->bus_clk);
|
|
reset_control_assert(drc->reset);
|
|
}
|
|
|
|
static const struct component_ops sun6i_drc_ops = {
|
|
.bind = sun6i_drc_bind,
|
|
.unbind = sun6i_drc_unbind,
|
|
};
|
|
|
|
static int sun6i_drc_probe(struct platform_device *pdev)
|
|
{
|
|
return component_add(&pdev->dev, &sun6i_drc_ops);
|
|
}
|
|
|
|
static int sun6i_drc_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &sun6i_drc_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sun6i_drc_of_table[] = {
|
|
{ .compatible = "allwinner,sun6i-a31-drc" },
|
|
{ .compatible = "allwinner,sun6i-a31s-drc" },
|
|
{ .compatible = "allwinner,sun8i-a23-drc" },
|
|
{ .compatible = "allwinner,sun8i-a33-drc" },
|
|
{ .compatible = "allwinner,sun9i-a80-drc" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sun6i_drc_of_table);
|
|
|
|
static struct platform_driver sun6i_drc_platform_driver = {
|
|
.probe = sun6i_drc_probe,
|
|
.remove = sun6i_drc_remove,
|
|
.driver = {
|
|
.name = "sun6i-drc",
|
|
.of_match_table = sun6i_drc_of_table,
|
|
},
|
|
};
|
|
module_platform_driver(sun6i_drc_platform_driver);
|
|
|
|
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
|
|
MODULE_DESCRIPTION("Allwinner A31 Dynamic Range Control (DRC) Driver");
|
|
MODULE_LICENSE("GPL");
|