diff options
Diffstat (limited to 'drivers/gpu/drm/imx/dcss/dcss-ss.c')
| -rw-r--r-- | drivers/gpu/drm/imx/dcss/dcss-ss.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dcss/dcss-ss.c b/drivers/gpu/drm/imx/dcss/dcss-ss.c new file mode 100644 index 000000000..8ddf08da9 --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-ss.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include <linux/device.h> +#include <linux/slab.h> + +#include "dcss-dev.h" + +#define DCSS_SS_SYS_CTRL 0x00 +#define RUN_EN BIT(0) +#define DCSS_SS_DISPLAY 0x10 +#define LRC_X_POS 0 +#define LRC_X_MASK GENMASK(12, 0) +#define LRC_Y_POS 16 +#define LRC_Y_MASK GENMASK(28, 16) +#define DCSS_SS_HSYNC 0x20 +#define DCSS_SS_VSYNC 0x30 +#define SYNC_START_POS 0 +#define SYNC_START_MASK GENMASK(12, 0) +#define SYNC_END_POS 16 +#define SYNC_END_MASK GENMASK(28, 16) +#define SYNC_POL BIT(31) +#define DCSS_SS_DE_ULC 0x40 +#define ULC_X_POS 0 +#define ULC_X_MASK GENMASK(12, 0) +#define ULC_Y_POS 16 +#define ULC_Y_MASK GENMASK(28, 16) +#define ULC_POL BIT(31) +#define DCSS_SS_DE_LRC 0x50 +#define DCSS_SS_MODE 0x60 +#define PIPE_MODE_POS 0 +#define PIPE_MODE_MASK GENMASK(1, 0) +#define DCSS_SS_COEFF 0x70 +#define HORIZ_A_POS 0 +#define HORIZ_A_MASK GENMASK(3, 0) +#define HORIZ_B_POS 4 +#define HORIZ_B_MASK GENMASK(7, 4) +#define HORIZ_C_POS 8 +#define HORIZ_C_MASK GENMASK(11, 8) +#define HORIZ_H_NORM_POS 12 +#define HORIZ_H_NORM_MASK GENMASK(14, 12) +#define VERT_A_POS 16 +#define VERT_A_MASK GENMASK(19, 16) +#define VERT_B_POS 20 +#define VERT_B_MASK GENMASK(23, 20) +#define VERT_C_POS 24 +#define VERT_C_MASK GENMASK(27, 24) +#define VERT_H_NORM_POS 28 +#define VERT_H_NORM_MASK GENMASK(30, 28) +#define DCSS_SS_CLIP_CB 0x80 +#define DCSS_SS_CLIP_CR 0x90 +#define CLIP_MIN_POS 0 +#define CLIP_MIN_MASK GENMASK(9, 0) +#define CLIP_MAX_POS 0 +#define CLIP_MAX_MASK GENMASK(23, 16) +#define DCSS_SS_INTER_MODE 0xA0 +#define INT_EN BIT(0) +#define VSYNC_SHIFT BIT(1) + +struct dcss_ss { + struct device *dev; + void __iomem *base_reg; + u32 base_ofs; + + struct dcss_ctxld *ctxld; + u32 ctx_id; + + bool in_use; +}; + +static void dcss_ss_write(struct dcss_ss *ss, u32 val, u32 ofs) +{ + if (!ss->in_use) + dcss_writel(val, ss->base_reg + ofs); + + dcss_ctxld_write(ss->ctxld, ss->ctx_id, val, + ss->base_ofs + ofs); +} + +int dcss_ss_init(struct dcss_dev *dcss, unsigned long ss_base) +{ + struct dcss_ss *ss; + + ss = kzalloc(sizeof(*ss), GFP_KERNEL); + if (!ss) + return -ENOMEM; + + dcss->ss = ss; + ss->dev = dcss->dev; + ss->ctxld = dcss->ctxld; + + ss->base_reg = ioremap(ss_base, SZ_4K); + if (!ss->base_reg) { + dev_err(dcss->dev, "ss: unable to remap ss base\n"); + kfree(ss); + return -ENOMEM; + } + + ss->base_ofs = ss_base; + ss->ctx_id = CTX_SB_HP; + + return 0; +} + +void dcss_ss_exit(struct dcss_ss *ss) +{ + /* stop SS */ + dcss_writel(0, ss->base_reg + DCSS_SS_SYS_CTRL); + + if (ss->base_reg) + iounmap(ss->base_reg); + + kfree(ss); +} + +void dcss_ss_subsam_set(struct dcss_ss *ss) +{ + dcss_ss_write(ss, 0x41614161, DCSS_SS_COEFF); + dcss_ss_write(ss, 0, DCSS_SS_MODE); + dcss_ss_write(ss, 0x03ff0000, DCSS_SS_CLIP_CB); + dcss_ss_write(ss, 0x03ff0000, DCSS_SS_CLIP_CR); +} + +void dcss_ss_sync_set(struct dcss_ss *ss, struct videomode *vm, + bool phsync, bool pvsync) +{ + u16 lrc_x, lrc_y; + u16 hsync_start, hsync_end; + u16 vsync_start, vsync_end; + u16 de_ulc_x, de_ulc_y; + u16 de_lrc_x, de_lrc_y; + + lrc_x = vm->hfront_porch + vm->hback_porch + vm->hsync_len + + vm->hactive - 1; + lrc_y = vm->vfront_porch + vm->vback_porch + vm->vsync_len + + vm->vactive - 1; + + dcss_ss_write(ss, (lrc_y << LRC_Y_POS) | lrc_x, DCSS_SS_DISPLAY); + + hsync_start = vm->hfront_porch + vm->hback_porch + vm->hsync_len + + vm->hactive - 1; + hsync_end = vm->hsync_len - 1; + + dcss_ss_write(ss, (phsync ? SYNC_POL : 0) | + ((u32)hsync_end << SYNC_END_POS) | hsync_start, + DCSS_SS_HSYNC); + + vsync_start = vm->vfront_porch - 1; + vsync_end = vm->vfront_porch + vm->vsync_len - 1; + + dcss_ss_write(ss, (pvsync ? SYNC_POL : 0) | + ((u32)vsync_end << SYNC_END_POS) | vsync_start, + DCSS_SS_VSYNC); + + de_ulc_x = vm->hsync_len + vm->hback_porch - 1; + de_ulc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch; + + dcss_ss_write(ss, SYNC_POL | ((u32)de_ulc_y << ULC_Y_POS) | de_ulc_x, + DCSS_SS_DE_ULC); + + de_lrc_x = vm->hsync_len + vm->hback_porch + vm->hactive - 1; + de_lrc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch + + vm->vactive - 1; + + dcss_ss_write(ss, (de_lrc_y << LRC_Y_POS) | de_lrc_x, DCSS_SS_DE_LRC); +} + +void dcss_ss_enable(struct dcss_ss *ss) +{ + dcss_ss_write(ss, RUN_EN, DCSS_SS_SYS_CTRL); + ss->in_use = true; +} + +void dcss_ss_shutoff(struct dcss_ss *ss) +{ + dcss_writel(0, ss->base_reg + DCSS_SS_SYS_CTRL); + ss->in_use = false; +} |