mirror of https://gitee.com/openkylin/linux.git
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*/
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#include <linux/export.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_of.h>
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#include "tidss_crtc.h"
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#include "tidss_drv.h"
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#include "tidss_encoder.h"
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static int tidss_encoder_atomic_check(struct drm_encoder *encoder,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state)
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{
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struct drm_device *ddev = encoder->dev;
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struct tidss_crtc_state *tcrtc_state = to_tidss_crtc_state(crtc_state);
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struct drm_display_info *di = &conn_state->connector->display_info;
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struct drm_bridge *bridge;
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bool bus_flags_set = false;
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dev_dbg(ddev->dev, "%s\n", __func__);
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/*
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* Take the bus_flags from the first bridge that defines
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* bridge timings, or from the connector's display_info if no
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* bridge defines the timings.
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*/
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list_for_each_entry(bridge, &encoder->bridge_chain, chain_node) {
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if (!bridge->timings)
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continue;
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tcrtc_state->bus_flags = bridge->timings->input_bus_flags;
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bus_flags_set = true;
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break;
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}
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if (!di->bus_formats || di->num_bus_formats == 0) {
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dev_err(ddev->dev, "%s: No bus_formats in connected display\n",
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__func__);
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return -EINVAL;
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}
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// XXX any cleaner way to set bus format and flags?
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tcrtc_state->bus_format = di->bus_formats[0];
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if (!bus_flags_set)
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tcrtc_state->bus_flags = di->bus_flags;
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return 0;
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}
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static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
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.atomic_check = tidss_encoder_atomic_check,
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};
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static const struct drm_encoder_funcs encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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struct drm_encoder *tidss_encoder_create(struct tidss_device *tidss,
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u32 encoder_type, u32 possible_crtcs)
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{
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struct drm_encoder *enc;
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int ret;
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enc = devm_kzalloc(tidss->dev, sizeof(*enc), GFP_KERNEL);
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if (!enc)
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return ERR_PTR(-ENOMEM);
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enc->possible_crtcs = possible_crtcs;
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ret = drm_encoder_init(&tidss->ddev, enc, &encoder_funcs,
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encoder_type, NULL);
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if (ret < 0)
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return ERR_PTR(ret);
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drm_encoder_helper_add(enc, &encoder_helper_funcs);
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dev_dbg(tidss->dev, "Encoder create done\n");
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return enc;
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}
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