forked from mirrors/linux
1c66496b13
Adds dsi host controller support for the Unisoc's display subsystem. Adds dsi phy support for the Unisoc's display subsystem. Only MIPI DSI Displays supported, DP/TV/HMDI will be support in the feature. v1: - Remove dphy and dsi graph binding, merge the dphy driver into the dsi. v2: - Use drm_xxx to replace all DRM_XXX. - Use kzalloc to replace devm_kzalloc for sprd_dsi structure init. v4: - Use drmm_helpers to allocate encoder. - Move allocate encoder and connector to bind function. v5: - Drop the dsi ip file prefix. - Fix the checkpatch warnings. - Add Signed-off-by for dsi&dphy patch. - Use the mode_flags of mipi_dsi_device to setup crtc DPI and EDPI mode. v6: - Redesign the way to access the dsi register. - Reduce the dsi_context member variables. v7: - Fix codeing style issue by checkpatch. - Drop the pll registers structure define. - Use bridge API instead of drm panel API. - Register mipi_dsi_host on probe phase; - Remove some unused function. v8: - Fix missing signed-off-by. - Move component_add to dsi_host.attach callback. Cc: Orson Zhai <orsonzhai@gmail.com> Cc: Chunyan Zhang <zhang.lyra@gmail.com> Signed-off-by: Kevin Tang <kevin.tang@unisoc.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211207142717.30296-7-kevin3.tang@gmail.com
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Unisoc Inc.
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*/
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#ifndef __SPRD_DSI_H__
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#define __SPRD_DSI_H__
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#include <linux/of.h>
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#include <linux/device.h>
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#include <linux/regmap.h>
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#include <video/videomode.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_connector.h>
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#include <drm/drm_encoder.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_print.h>
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#include <drm/drm_panel.h>
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#define encoder_to_dsi(encoder) \
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container_of(encoder, struct sprd_dsi, encoder)
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enum dsi_work_mode {
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DSI_MODE_CMD = 0,
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DSI_MODE_VIDEO
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};
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enum video_burst_mode {
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VIDEO_NON_BURST_WITH_SYNC_PULSES = 0,
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VIDEO_NON_BURST_WITH_SYNC_EVENTS,
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VIDEO_BURST_WITH_SYNC_PULSES
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};
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enum dsi_color_coding {
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COLOR_CODE_16BIT_CONFIG1 = 0,
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COLOR_CODE_16BIT_CONFIG2,
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COLOR_CODE_16BIT_CONFIG3,
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COLOR_CODE_18BIT_CONFIG1,
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COLOR_CODE_18BIT_CONFIG2,
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COLOR_CODE_24BIT,
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COLOR_CODE_20BIT_YCC422_LOOSELY,
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COLOR_CODE_24BIT_YCC422,
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COLOR_CODE_16BIT_YCC422,
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COLOR_CODE_30BIT,
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COLOR_CODE_36BIT,
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COLOR_CODE_12BIT_YCC420,
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COLOR_CODE_COMPRESSTION,
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COLOR_CODE_MAX
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};
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enum pll_timing {
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NONE,
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REQUEST_TIME,
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PREPARE_TIME,
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SETTLE_TIME,
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ZERO_TIME,
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TRAIL_TIME,
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EXIT_TIME,
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CLKPOST_TIME,
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TA_GET,
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TA_GO,
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TA_SURE,
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TA_WAIT,
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};
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struct dphy_pll {
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u8 refin; /* Pre-divider control signal */
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u8 cp_s; /* 00: SDM_EN=1, 10: SDM_EN=0 */
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u8 fdk_s; /* PLL mode control: integer or fraction */
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u8 sdm_en;
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u8 div;
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u8 int_n; /* integer N PLL */
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u32 ref_clk; /* dphy reference clock, unit: MHz */
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u32 freq; /* panel config, unit: KHz */
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u32 fvco;
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u32 potential_fvco;
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u32 nint; /* sigma delta modulator NINT control */
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u32 kint; /* sigma delta modulator KINT control */
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u8 lpf_sel; /* low pass filter control */
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u8 out_sel; /* post divider control */
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u8 vco_band; /* vco range */
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u8 det_delay;
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};
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struct dsi_context {
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void __iomem *base;
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struct regmap *regmap;
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struct dphy_pll pll;
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struct videomode vm;
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bool enabled;
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u8 work_mode;
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u8 burst_mode;
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u32 int0_mask;
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u32 int1_mask;
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/* maximum time (ns) for data lanes from HS to LP */
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u16 data_hs2lp;
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/* maximum time (ns) for data lanes from LP to HS */
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u16 data_lp2hs;
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/* maximum time (ns) for clk lanes from HS to LP */
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u16 clk_hs2lp;
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/* maximum time (ns) for clk lanes from LP to HS */
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u16 clk_lp2hs;
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/* maximum time (ns) for BTA operation - REQUIRED */
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u16 max_rd_time;
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/* enable receiving frame ack packets - for video mode */
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bool frame_ack_en;
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/* enable receiving tear effect ack packets - for cmd mode */
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bool te_ack_en;
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};
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struct sprd_dsi {
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struct drm_device *drm;
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struct mipi_dsi_host host;
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struct mipi_dsi_device *slave;
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struct drm_encoder encoder;
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struct drm_bridge *panel_bridge;
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struct dsi_context ctx;
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};
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int dphy_pll_config(struct dsi_context *ctx);
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void dphy_timing_config(struct dsi_context *ctx);
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#endif /* __SPRD_DSI_H__ */
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