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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) STMicroelectronics SA 20144 * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.5 */6#include <linux/seq_file.h>7 8#include <drm/drm_debugfs.h>9#include <drm/drm_file.h>10#include <drm/drm_print.h>11 12#include "sti_plane.h"13#include "sti_vid.h"14#include "sti_vtg.h"15 16/* Registers */17#define VID_CTL                 0x0018#define VID_ALP                 0x0419#define VID_CLF                 0x0820#define VID_VPO                 0x0C21#define VID_VPS                 0x1022#define VID_KEY1                0x2823#define VID_KEY2                0x2C24#define VID_MPR0                0x3025#define VID_MPR1                0x3426#define VID_MPR2                0x3827#define VID_MPR3                0x3C28#define VID_MST                 0x6829#define VID_BC                  0x7030#define VID_TINT                0x7431#define VID_CSAT                0x7832 33/* Registers values */34#define VID_CTL_IGNORE          (BIT(31) | BIT(30))35#define VID_CTL_PSI_ENABLE      (BIT(2) | BIT(1) | BIT(0))36#define VID_ALP_OPAQUE          0x0000008037#define VID_BC_DFLT             0x0000800038#define VID_TINT_DFLT           0x0000000039#define VID_CSAT_DFLT           0x0000008040/* YCbCr to RGB BT709:41 * R = Y+1.5391Cr42 * G = Y-0.4590Cr-0.1826Cb43 * B = Y+1.8125Cb */44#define VID_MPR0_BT709          0x0A80000045#define VID_MPR1_BT709          0x0AC5000046#define VID_MPR2_BT709          0x0715054547#define VID_MPR3_BT709          0x00000AE848/* YCbCr to RGB BT709:49 * R = Y+1.3711Cr50 * G = Y-0.6992Cr-0.3359Cb51 * B = Y+1.7344Cb52 */53#define VID_MPR0_BT601          0x0A80000054#define VID_MPR1_BT601          0x0AAF000055#define VID_MPR2_BT601          0x094E075456#define VID_MPR3_BT601          0x00000ADD57 58#define VID_MIN_HD_HEIGHT       72059 60#define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \61				   readl(vid->regs + reg))62 63static void vid_dbg_ctl(struct seq_file *s, int val)64{65	val = val >> 30;66	seq_putc(s, '\t');67 68	if (!(val & 1))69		seq_puts(s, "NOT ");70	seq_puts(s, "ignored on main mixer - ");71 72	if (!(val & 2))73		seq_puts(s, "NOT ");74	seq_puts(s, "ignored on aux mixer");75}76 77static void vid_dbg_vpo(struct seq_file *s, int val)78{79	seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);80}81 82static void vid_dbg_vps(struct seq_file *s, int val)83{84	seq_printf(s, "\txds:%4d\tyds:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);85}86 87static void vid_dbg_mst(struct seq_file *s, int val)88{89	if (val & 1)90		seq_puts(s, "\tBUFFER UNDERFLOW!");91}92 93static int vid_dbg_show(struct seq_file *s, void *arg)94{95	struct drm_info_node *node = s->private;96	struct sti_vid *vid = (struct sti_vid *)node->info_ent->data;97 98	seq_printf(s, "VID: (vaddr= 0x%p)", vid->regs);99 100	DBGFS_DUMP(VID_CTL);101	vid_dbg_ctl(s, readl(vid->regs + VID_CTL));102	DBGFS_DUMP(VID_ALP);103	DBGFS_DUMP(VID_CLF);104	DBGFS_DUMP(VID_VPO);105	vid_dbg_vpo(s, readl(vid->regs + VID_VPO));106	DBGFS_DUMP(VID_VPS);107	vid_dbg_vps(s, readl(vid->regs + VID_VPS));108	DBGFS_DUMP(VID_KEY1);109	DBGFS_DUMP(VID_KEY2);110	DBGFS_DUMP(VID_MPR0);111	DBGFS_DUMP(VID_MPR1);112	DBGFS_DUMP(VID_MPR2);113	DBGFS_DUMP(VID_MPR3);114	DBGFS_DUMP(VID_MST);115	vid_dbg_mst(s, readl(vid->regs + VID_MST));116	DBGFS_DUMP(VID_BC);117	DBGFS_DUMP(VID_TINT);118	DBGFS_DUMP(VID_CSAT);119	seq_putc(s, '\n');120	return 0;121}122 123static struct drm_info_list vid_debugfs_files[] = {124	{ "vid", vid_dbg_show, 0, NULL },125};126 127void vid_debugfs_init(struct sti_vid *vid, struct drm_minor *minor)128{129	unsigned int i;130 131	for (i = 0; i < ARRAY_SIZE(vid_debugfs_files); i++)132		vid_debugfs_files[i].data = vid;133 134	drm_debugfs_create_files(vid_debugfs_files,135				 ARRAY_SIZE(vid_debugfs_files),136				 minor->debugfs_root, minor);137}138 139void sti_vid_commit(struct sti_vid *vid,140		    struct drm_plane_state *state)141{142	struct drm_crtc *crtc = state->crtc;143	struct drm_display_mode *mode = &crtc->mode;144	int dst_x = state->crtc_x;145	int dst_y = state->crtc_y;146	int dst_w = clamp_val(state->crtc_w, 0, mode->hdisplay - dst_x);147	int dst_h = clamp_val(state->crtc_h, 0, mode->vdisplay - dst_y);148	int src_h = state->src_h >> 16;149	u32 val, ydo, xdo, yds, xds;150 151	/* Input / output size152	 * Align to upper even value */153	dst_w = ALIGN(dst_w, 2);154	dst_h = ALIGN(dst_h, 2);155 156	/* Unmask */157	val = readl(vid->regs + VID_CTL);158	val &= ~VID_CTL_IGNORE;159	writel(val, vid->regs + VID_CTL);160 161	ydo = sti_vtg_get_line_number(*mode, dst_y);162	yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1);163	xdo = sti_vtg_get_pixel_number(*mode, dst_x);164	xds = sti_vtg_get_pixel_number(*mode, dst_x + dst_w - 1);165 166	writel((ydo << 16) | xdo, vid->regs + VID_VPO);167	writel((yds << 16) | xds, vid->regs + VID_VPS);168 169	/* Color conversion parameters */170	if (src_h >= VID_MIN_HD_HEIGHT) {171		writel(VID_MPR0_BT709, vid->regs + VID_MPR0);172		writel(VID_MPR1_BT709, vid->regs + VID_MPR1);173		writel(VID_MPR2_BT709, vid->regs + VID_MPR2);174		writel(VID_MPR3_BT709, vid->regs + VID_MPR3);175	} else {176		writel(VID_MPR0_BT601, vid->regs + VID_MPR0);177		writel(VID_MPR1_BT601, vid->regs + VID_MPR1);178		writel(VID_MPR2_BT601, vid->regs + VID_MPR2);179		writel(VID_MPR3_BT601, vid->regs + VID_MPR3);180	}181}182 183void sti_vid_disable(struct sti_vid *vid)184{185	u32 val;186 187	/* Mask */188	val = readl(vid->regs + VID_CTL);189	val |= VID_CTL_IGNORE;190	writel(val, vid->regs + VID_CTL);191}192 193static void sti_vid_init(struct sti_vid *vid)194{195	/* Enable PSI, Mask layer */196	writel(VID_CTL_PSI_ENABLE | VID_CTL_IGNORE, vid->regs + VID_CTL);197 198	/* Opaque */199	writel(VID_ALP_OPAQUE, vid->regs + VID_ALP);200 201	/* Brightness, contrast, tint, saturation */202	writel(VID_BC_DFLT, vid->regs + VID_BC);203	writel(VID_TINT_DFLT, vid->regs + VID_TINT);204	writel(VID_CSAT_DFLT, vid->regs + VID_CSAT);205}206 207struct sti_vid *sti_vid_create(struct device *dev, struct drm_device *drm_dev,208			       int id, void __iomem *baseaddr)209{210	struct sti_vid *vid;211 212	vid = devm_kzalloc(dev, sizeof(*vid), GFP_KERNEL);213	if (!vid) {214		DRM_ERROR("Failed to allocate memory for VID\n");215		return NULL;216	}217 218	vid->dev = dev;219	vid->regs = baseaddr;220	vid->id = id;221 222	sti_vid_init(vid);223 224	return vid;225}226