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author | Yakir Yang <ykk@rock-chips.com> | 2016-03-29 09:57:30 +0800 |
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committer | Yakir Yang <ykk@rock-chips.com> | 2016-04-05 10:13:04 +0800 |
commit | 9e32e16e9e989f2c4a11b377c5ed3e1c7be16cfb (patch) | |
tree | bedea56fe2a7b53cd2cab42cdac3a56f92e33899 /drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | |
parent | 12315576b31990858a1952ad78ba86f516e6e4b5 (diff) | |
download | op-kernel-dev-9e32e16e9e989f2c4a11b377c5ed3e1c7be16cfb.zip op-kernel-dev-9e32e16e9e989f2c4a11b377c5ed3e1c7be16cfb.tar.gz |
drm: rockchip: dp: add rockchip platform dp driver
Rockchip have three clocks for dp controller, we leave pclk_edp
to analogix_dp driver control, and keep the sclk_edp_24m and
sclk_edp in platform driver.
Acked-by: Mark Yao <mark.yao@rock-chips.com>
Tested-by: Caesar Wang <wxt@rock-chips.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'drivers/gpu/drm/rockchip/analogix_dp-rockchip.c')
-rw-r--r-- | drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c new file mode 100644 index 0000000..a1d94d8 --- /dev/null +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -0,0 +1,384 @@ +/* + * Rockchip SoC DP (Display Port) interface driver. + * + * Copyright (C) Fuzhou Rockchip Electronics Co., Ltd. + * Author: Andy Yan <andy.yan@rock-chips.com> + * Yakir Yang <ykk@rock-chips.com> + * Jeff Chen <jeff.chen@rock-chips.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/component.h> +#include <linux/mfd/syscon.h> +#include <linux/of_graph.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/clk.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_of.h> +#include <drm/drm_panel.h> + +#include <video/of_videomode.h> +#include <video/videomode.h> + +#include <drm/bridge/analogix_dp.h> + +#include "rockchip_drm_drv.h" +#include "rockchip_drm_vop.h" + +#define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm) + +/* dp grf register offset */ +#define GRF_SOC_CON6 0x025c +#define GRF_EDP_LCD_SEL_MASK BIT(5) +#define GRF_EDP_SEL_VOP_LIT BIT(5) +#define GRF_EDP_SEL_VOP_BIG 0 + +struct rockchip_dp_device { + struct drm_device *drm_dev; + struct device *dev; + struct drm_encoder encoder; + struct drm_display_mode mode; + + struct clk *pclk; + struct regmap *grf; + struct reset_control *rst; + + struct analogix_dp_plat_data plat_data; +}; + +static int rockchip_dp_pre_init(struct rockchip_dp_device *dp) +{ + reset_control_assert(dp->rst); + usleep_range(10, 20); + reset_control_deassert(dp->rst); + + return 0; +} + +static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data) +{ + struct rockchip_dp_device *dp = to_dp(plat_data); + int ret; + + ret = clk_prepare_enable(dp->pclk); + if (ret < 0) { + dev_err(dp->dev, "failed to enable pclk %d\n", ret); + return ret; + } + + ret = rockchip_dp_pre_init(dp); + if (ret < 0) { + dev_err(dp->dev, "failed to dp pre init %d\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data) +{ + struct rockchip_dp_device *dp = to_dp(plat_data); + + clk_disable_unprepare(dp->pclk); + + return 0; +} + +static bool +rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + /* do nothing */ + return true; +} + +static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted) +{ + /* do nothing */ +} + +static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder) +{ + struct rockchip_dp_device *dp = to_dp(encoder); + int ret; + u32 val; + + /* + * FIXME(Yakir): driver should configure the CRTC output video + * mode with the display information which indicated the monitor + * support colorimetry. + * + * But don't know why the CRTC driver seems could only output the + * RGBaaa rightly. For example, if connect the "innolux,n116bge" + * eDP screen, EDID would indicated that screen only accepted the + * 6bpc mode. But if I configure CRTC to RGB666 output, then eDP + * screen would show a blue picture (RGB888 show a green picture). + * But if I configure CTRC to RGBaaa, and eDP driver still keep + * RGB666 input video mode, then screen would works prefect. + */ + ret = rockchip_drm_crtc_mode_config(encoder->crtc, + DRM_MODE_CONNECTOR_eDP, + ROCKCHIP_OUT_MODE_AAAA); + if (ret < 0) { + dev_err(dp->dev, "Could not set crtc mode config (%d)\n", ret); + return; + } + + ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder); + if (ret < 0) + return; + + if (ret) + val = GRF_EDP_SEL_VOP_LIT | (GRF_EDP_LCD_SEL_MASK << 16); + else + val = GRF_EDP_SEL_VOP_BIG | (GRF_EDP_LCD_SEL_MASK << 16); + + dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG"); + + ret = regmap_write(dp->grf, GRF_SOC_CON6, val); + if (ret != 0) { + dev_err(dp->dev, "Could not write to GRF: %d\n", ret); + return; + } +} + +static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder) +{ + /* do nothing */ +} + +static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = { + .mode_fixup = rockchip_dp_drm_encoder_mode_fixup, + .mode_set = rockchip_dp_drm_encoder_mode_set, + .enable = rockchip_dp_drm_encoder_enable, + .disable = rockchip_dp_drm_encoder_nop, +}; + +static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); +} + +static struct drm_encoder_funcs rockchip_dp_encoder_funcs = { + .destroy = rockchip_dp_drm_encoder_destroy, +}; + +static int rockchip_dp_init(struct rockchip_dp_device *dp) +{ + struct device *dev = dp->dev; + struct device_node *np = dev->of_node; + int ret; + + dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); + if (IS_ERR(dp->grf)) { + dev_err(dev, "failed to get rockchip,grf property\n"); + return PTR_ERR(dp->grf); + } + + dp->pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(dp->pclk)) { + dev_err(dev, "failed to get pclk property\n"); + return PTR_ERR(dp->pclk); + } + + dp->rst = devm_reset_control_get(dev, "dp"); + if (IS_ERR(dp->rst)) { + dev_err(dev, "failed to get dp reset control\n"); + return PTR_ERR(dp->rst); + } + + ret = clk_prepare_enable(dp->pclk); + if (ret < 0) { + dev_err(dp->dev, "failed to enable pclk %d\n", ret); + return ret; + } + + ret = rockchip_dp_pre_init(dp); + if (ret < 0) { + dev_err(dp->dev, "failed to pre init %d\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp) +{ + struct drm_encoder *encoder = &dp->encoder; + struct drm_device *drm_dev = dp->drm_dev; + struct device *dev = dp->dev; + int ret; + + encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, + dev->of_node); + DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); + + ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs, + DRM_MODE_ENCODER_TMDS, NULL); + if (ret) { + DRM_ERROR("failed to initialize encoder with drm\n"); + return ret; + } + + drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs); + + return 0; +} + +static int rockchip_dp_bind(struct device *dev, struct device *master, + void *data) +{ + struct rockchip_dp_device *dp = dev_get_drvdata(dev); + struct drm_device *drm_dev = data; + int ret; + + /* + * Just like the probe function said, we don't need the + * device drvrate anymore, we should leave the charge to + * analogix dp driver, set the device drvdata to NULL. + */ + dev_set_drvdata(dev, NULL); + + ret = rockchip_dp_init(dp); + if (ret < 0) + return ret; + + dp->drm_dev = drm_dev; + + ret = rockchip_dp_drm_create_encoder(dp); + if (ret) { + DRM_ERROR("failed to create drm encoder\n"); + return ret; + } + + dp->plat_data.encoder = &dp->encoder; + + dp->plat_data.dev_type = RK3288_DP; + dp->plat_data.power_on = rockchip_dp_poweron; + dp->plat_data.power_off = rockchip_dp_powerdown; + + return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data); +} + +static void rockchip_dp_unbind(struct device *dev, struct device *master, + void *data) +{ + return analogix_dp_unbind(dev, master, data); +} + +static const struct component_ops rockchip_dp_component_ops = { + .bind = rockchip_dp_bind, + .unbind = rockchip_dp_unbind, +}; + +static int rockchip_dp_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *panel_node, *port, *endpoint; + struct rockchip_dp_device *dp; + struct drm_panel *panel; + + port = of_graph_get_port_by_id(dev->of_node, 1); + if (!port) { + dev_err(dev, "can't find output port\n"); + return -EINVAL; + } + + endpoint = of_get_child_by_name(port, "endpoint"); + of_node_put(port); + if (!endpoint) { + dev_err(dev, "no output endpoint found\n"); + return -EINVAL; + } + + panel_node = of_graph_get_remote_port_parent(endpoint); + of_node_put(endpoint); + if (!panel_node) { + dev_err(dev, "no output node found\n"); + return -EINVAL; + } + + panel = of_drm_find_panel(panel_node); + if (!panel) { + DRM_ERROR("failed to find panel\n"); + of_node_put(panel_node); + return -EPROBE_DEFER; + } + + of_node_put(panel_node); + + dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); + if (!dp) + return -ENOMEM; + + dp->dev = dev; + + dp->plat_data.panel = panel; + + /* + * We just use the drvdata until driver run into component + * add function, and then we would set drvdata to null, so + * that analogix dp driver could take charge of the drvdata. + */ + platform_set_drvdata(pdev, dp); + + return component_add(dev, &rockchip_dp_component_ops); +} + +static int rockchip_dp_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &rockchip_dp_component_ops); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int rockchip_dp_suspend(struct device *dev) +{ + return analogix_dp_suspend(dev); +} + +static int rockchip_dp_resume(struct device *dev) +{ + return analogix_dp_resume(dev); +} +#endif + +static const struct dev_pm_ops rockchip_dp_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume) +}; + +static const struct of_device_id rockchip_dp_dt_ids[] = { + {.compatible = "rockchip,rk3288-dp",}, + {} +}; +MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids); + +static struct platform_driver rockchip_dp_driver = { + .probe = rockchip_dp_probe, + .remove = rockchip_dp_remove, + .driver = { + .name = "rockchip-dp", + .owner = THIS_MODULE, + .pm = &rockchip_dp_pm_ops, + .of_match_table = of_match_ptr(rockchip_dp_dt_ids), + }, +}; + +module_platform_driver(rockchip_dp_driver); + +MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); +MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension"); +MODULE_LICENSE("GPL v2"); |