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e74b84cd83
This is the new API for allocating DRM bridges. These two drivers are tangled together by the ldb_add_bridge_helper(), so they are converted at once. They also have a similar design, each embedding an array of channels in their main struct, and each channel embeds a drm_bridge. This prevents dynamic, refcount-based deallocation of the bridges. To make the new, dynamic bridge allocation possible: * change the array of channels into an array of channel pointers * allocate each channel using devm_drm_bridge_alloc() * adapt ldb_add_bridge_helper() to not set the funcs pointer (now done by devm_drm_bridge_alloc()) * adapt the code wherever using the channels Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Acked-by: Liu Ying <victor.liu@nxp.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250424-drm-bridge-convert-to-alloc-api-v2-31-8f91a404d86b@bootlin.com Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright 2019,2020,2022 NXP
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*/
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#ifndef __IMX_LDB_HELPER__
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#define __IMX_LDB_HELPER__
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_device.h>
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#include <drm/drm_encoder.h>
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#include <drm/drm_modeset_helper_vtables.h>
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#define LDB_CH0_MODE_EN_TO_DI0 BIT(0)
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#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0)
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#define LDB_CH0_MODE_EN_MASK (3 << 0)
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#define LDB_CH1_MODE_EN_TO_DI0 BIT(2)
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#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2)
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#define LDB_CH1_MODE_EN_MASK (3 << 2)
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#define LDB_SPLIT_MODE_EN BIT(4)
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#define LDB_DATA_WIDTH_CH0_24 BIT(5)
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#define LDB_BIT_MAP_CH0_JEIDA BIT(6)
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#define LDB_DATA_WIDTH_CH1_24 BIT(7)
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#define LDB_BIT_MAP_CH1_JEIDA BIT(8)
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#define LDB_DI0_VS_POL_ACT_LOW BIT(9)
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#define LDB_DI1_VS_POL_ACT_LOW BIT(10)
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#define MAX_LDB_CHAN_NUM 2
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enum ldb_channel_link_type {
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LDB_CH_SINGLE_LINK,
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LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS,
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LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS,
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};
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struct ldb;
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struct ldb_channel {
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struct ldb *ldb;
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struct drm_bridge bridge;
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struct drm_bridge *next_bridge;
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struct device_node *np;
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u32 chno;
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bool is_available;
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u32 in_bus_format;
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u32 out_bus_format;
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enum ldb_channel_link_type link_type;
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};
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struct ldb {
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struct regmap *regmap;
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struct device *dev;
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struct ldb_channel *channel[MAX_LDB_CHAN_NUM];
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unsigned int ctrl_reg;
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u32 ldb_ctrl;
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unsigned int available_ch_cnt;
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};
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#define bridge_to_ldb_ch(b) container_of(b, struct ldb_channel, bridge)
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bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);
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bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);
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int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
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struct drm_bridge_state *bridge_state,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state);
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void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
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const struct drm_display_mode *mode,
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const struct drm_display_mode *adjusted_mode);
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void ldb_bridge_enable_helper(struct drm_bridge *bridge);
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void ldb_bridge_disable_helper(struct drm_bridge *bridge);
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int ldb_bridge_attach_helper(struct drm_bridge *bridge, struct drm_encoder *encoder,
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enum drm_bridge_attach_flags flags);
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int ldb_init_helper(struct ldb *ldb);
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int ldb_find_next_bridge_helper(struct ldb *ldb);
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void ldb_add_bridge_helper(struct ldb *ldb);
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void ldb_remove_bridge_helper(struct ldb *ldb);
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#endif /* __IMX_LDB_HELPER__ */
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