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sw.multimedia
eab5d29d4f
Add starfive DRM Display driver framework Signed-off-by: jack.zhu <jack.zhu@starfivetech.com> Signed-off-by: keith.zhao <keith.zhao@starfivetech.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: José Expósito <jose.exposito89@gmail.com> Link: https://lore.kernel.org/r/a8ca722539672d6369d6e4092e1e08cb6b58c546.1645535955.git.geert@linux-m68k.org Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 StarFive Technology Co., Ltd.
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/of_device.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_atomic_uapi.h>
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#include <drm/drm_fb_dma_helper.h>
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#include <drm/drm_print.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_vblank.h>
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#include <drm/drm_of.h>
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#include "starfive_drm_drv.h"
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#include "starfive_drm_encoder.h"
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static void starfive_encoder_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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kfree(encoder);
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}
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static const struct drm_encoder_funcs starfive_encoder_funcs = {
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.destroy = starfive_encoder_destroy,
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};
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static int starfive_encoder_bind(struct device *dev, struct device *master, void *data)
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{
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struct drm_device *drm_dev = data;
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struct device_node *np = dev->of_node;
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struct starfive_encoder *encoderp;
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int ret;
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struct drm_panel *tmp_panel;
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struct drm_bridge *tmp_bridge;
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u32 crtcs = 0;
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encoderp = devm_kzalloc(dev, sizeof(*encoderp), GFP_KERNEL);
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if (!encoderp)
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return -ENOMEM;
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encoderp->dev = dev;
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encoderp->drm_dev = drm_dev;
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dev_set_drvdata(dev, encoderp);
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if (dev->of_node) {
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crtcs = drm_of_find_possible_crtcs(drm_dev, dev->of_node);
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if (of_property_read_u32(np, "encoder-type", &encoderp->encoder_type)) {
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DRM_ERROR("Missing encoder-type property in the DT.\n");
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encoderp->encoder_type = DRM_MODE_ENCODER_TMDS;
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}
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}
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/* If no CRTCs were found, fall back to our old behaviour */
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if (crtcs == 0) {
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dev_warn(dev, "Falling back to first CRTC\n");
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crtcs = 1 << 0;
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}
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encoderp->encoder.possible_crtcs = crtcs;
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ret = drm_encoder_init(drm_dev, &encoderp->encoder,
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&starfive_encoder_funcs,
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encoderp->encoder_type, NULL);
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if (ret)
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return dev_err_probe(dev, ret, "error initializing encoder\n");
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ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
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&tmp_panel, &tmp_bridge);
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if (ret) {
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dev_err_probe(dev, ret, "endpoint returns %d\n", ret);
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goto err_bridge;
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}
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if (tmp_panel)
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DRM_INFO("found panel on endpoint\n");
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if (tmp_bridge)
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DRM_INFO("found bridge on endpoint\n");
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ret = drm_bridge_attach(&encoderp->encoder, tmp_bridge, NULL, 0);
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if (ret)
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goto err_bridge;
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return 0;
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err_bridge:
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drm_encoder_cleanup(&encoderp->encoder);
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return ret;
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}
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static void starfive_encoder_unbind(struct device *dev, struct device *master, void *data)
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{
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struct starfive_encoder *encoderp = dev_get_drvdata(dev);
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starfive_encoder_destroy(&encoderp->encoder);
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}
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static const struct component_ops starfive_encoder_component_ops = {
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.bind = starfive_encoder_bind,
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.unbind = starfive_encoder_unbind,
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};
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static const struct of_device_id starfive_encoder_driver_dt_match[] = {
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{ .compatible = "starfive,display-encoder" },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, starfive_encoder_driver_dt_match);
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static int starfive_encoder_probe(struct platform_device *pdev)
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{
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return component_add(&pdev->dev, &starfive_encoder_component_ops);
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}
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static int starfive_encoder_remove(struct platform_device *pdev)
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{
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component_del(&pdev->dev, &starfive_encoder_component_ops);
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return 0;
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}
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struct platform_driver starfive_encoder_driver = {
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.probe = starfive_encoder_probe,
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.remove = starfive_encoder_remove,
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.driver = {
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.name = "display-encoder",
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.of_match_table = of_match_ptr(starfive_encoder_driver_dt_match),
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},
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};
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