181 lines
4.5 KiB
C
181 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2019 NXP.
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*/
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#include <linux/device.h>
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#include <linux/slab.h>
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#include "dcss-dev.h"
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#define DCSS_SS_SYS_CTRL 0x00
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#define RUN_EN BIT(0)
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#define DCSS_SS_DISPLAY 0x10
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#define LRC_X_POS 0
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#define LRC_X_MASK GENMASK(12, 0)
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#define LRC_Y_POS 16
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#define LRC_Y_MASK GENMASK(28, 16)
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#define DCSS_SS_HSYNC 0x20
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#define DCSS_SS_VSYNC 0x30
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#define SYNC_START_POS 0
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#define SYNC_START_MASK GENMASK(12, 0)
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#define SYNC_END_POS 16
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#define SYNC_END_MASK GENMASK(28, 16)
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#define SYNC_POL BIT(31)
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#define DCSS_SS_DE_ULC 0x40
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#define ULC_X_POS 0
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#define ULC_X_MASK GENMASK(12, 0)
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#define ULC_Y_POS 16
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#define ULC_Y_MASK GENMASK(28, 16)
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#define ULC_POL BIT(31)
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#define DCSS_SS_DE_LRC 0x50
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#define DCSS_SS_MODE 0x60
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#define PIPE_MODE_POS 0
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#define PIPE_MODE_MASK GENMASK(1, 0)
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#define DCSS_SS_COEFF 0x70
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#define HORIZ_A_POS 0
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#define HORIZ_A_MASK GENMASK(3, 0)
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#define HORIZ_B_POS 4
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#define HORIZ_B_MASK GENMASK(7, 4)
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#define HORIZ_C_POS 8
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#define HORIZ_C_MASK GENMASK(11, 8)
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#define HORIZ_H_NORM_POS 12
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#define HORIZ_H_NORM_MASK GENMASK(14, 12)
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#define VERT_A_POS 16
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#define VERT_A_MASK GENMASK(19, 16)
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#define VERT_B_POS 20
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#define VERT_B_MASK GENMASK(23, 20)
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#define VERT_C_POS 24
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#define VERT_C_MASK GENMASK(27, 24)
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#define VERT_H_NORM_POS 28
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#define VERT_H_NORM_MASK GENMASK(30, 28)
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#define DCSS_SS_CLIP_CB 0x80
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#define DCSS_SS_CLIP_CR 0x90
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#define CLIP_MIN_POS 0
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#define CLIP_MIN_MASK GENMASK(9, 0)
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#define CLIP_MAX_POS 0
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#define CLIP_MAX_MASK GENMASK(23, 16)
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#define DCSS_SS_INTER_MODE 0xA0
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#define INT_EN BIT(0)
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#define VSYNC_SHIFT BIT(1)
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struct dcss_ss {
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struct device *dev;
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void __iomem *base_reg;
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u32 base_ofs;
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struct dcss_ctxld *ctxld;
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u32 ctx_id;
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bool in_use;
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};
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static void dcss_ss_write(struct dcss_ss *ss, u32 val, u32 ofs)
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{
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if (!ss->in_use)
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dcss_writel(val, ss->base_reg + ofs);
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dcss_ctxld_write(ss->ctxld, ss->ctx_id, val,
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ss->base_ofs + ofs);
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}
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int dcss_ss_init(struct dcss_dev *dcss, unsigned long ss_base)
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{
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struct dcss_ss *ss;
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ss = kzalloc(sizeof(*ss), GFP_KERNEL);
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if (!ss)
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return -ENOMEM;
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dcss->ss = ss;
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ss->dev = dcss->dev;
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ss->ctxld = dcss->ctxld;
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ss->base_reg = ioremap(ss_base, SZ_4K);
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if (!ss->base_reg) {
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dev_err(dcss->dev, "ss: unable to remap ss base\n");
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kfree(ss);
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return -ENOMEM;
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}
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ss->base_ofs = ss_base;
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ss->ctx_id = CTX_SB_HP;
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return 0;
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}
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void dcss_ss_exit(struct dcss_ss *ss)
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{
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/* stop SS */
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dcss_writel(0, ss->base_reg + DCSS_SS_SYS_CTRL);
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if (ss->base_reg)
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iounmap(ss->base_reg);
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kfree(ss);
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}
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void dcss_ss_subsam_set(struct dcss_ss *ss)
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{
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dcss_ss_write(ss, 0x41614161, DCSS_SS_COEFF);
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dcss_ss_write(ss, 0, DCSS_SS_MODE);
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dcss_ss_write(ss, 0x03ff0000, DCSS_SS_CLIP_CB);
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dcss_ss_write(ss, 0x03ff0000, DCSS_SS_CLIP_CR);
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}
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void dcss_ss_sync_set(struct dcss_ss *ss, struct videomode *vm,
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bool phsync, bool pvsync)
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{
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u16 lrc_x, lrc_y;
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u16 hsync_start, hsync_end;
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u16 vsync_start, vsync_end;
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u16 de_ulc_x, de_ulc_y;
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u16 de_lrc_x, de_lrc_y;
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lrc_x = vm->hfront_porch + vm->hback_porch + vm->hsync_len +
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vm->hactive - 1;
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lrc_y = vm->vfront_porch + vm->vback_porch + vm->vsync_len +
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vm->vactive - 1;
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dcss_ss_write(ss, (lrc_y << LRC_Y_POS) | lrc_x, DCSS_SS_DISPLAY);
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hsync_start = vm->hfront_porch + vm->hback_porch + vm->hsync_len +
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vm->hactive - 1;
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hsync_end = vm->hsync_len - 1;
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dcss_ss_write(ss, (phsync ? SYNC_POL : 0) |
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((u32)hsync_end << SYNC_END_POS) | hsync_start,
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DCSS_SS_HSYNC);
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vsync_start = vm->vfront_porch - 1;
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vsync_end = vm->vfront_porch + vm->vsync_len - 1;
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dcss_ss_write(ss, (pvsync ? SYNC_POL : 0) |
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((u32)vsync_end << SYNC_END_POS) | vsync_start,
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DCSS_SS_VSYNC);
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de_ulc_x = vm->hsync_len + vm->hback_porch - 1;
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de_ulc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch;
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dcss_ss_write(ss, SYNC_POL | ((u32)de_ulc_y << ULC_Y_POS) | de_ulc_x,
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DCSS_SS_DE_ULC);
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de_lrc_x = vm->hsync_len + vm->hback_porch + vm->hactive - 1;
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de_lrc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch +
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vm->vactive - 1;
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dcss_ss_write(ss, (de_lrc_y << LRC_Y_POS) | de_lrc_x, DCSS_SS_DE_LRC);
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}
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void dcss_ss_enable(struct dcss_ss *ss)
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{
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dcss_ss_write(ss, RUN_EN, DCSS_SS_SYS_CTRL);
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ss->in_use = true;
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}
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void dcss_ss_shutoff(struct dcss_ss *ss)
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{
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dcss_writel(0, ss->base_reg + DCSS_SS_SYS_CTRL);
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ss->in_use = false;
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}
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