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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
* Fabien Dessenne <fabien.dessenne@st.com>
* for STMicroelectronics.
*/
#include <linux/seq_file.h>
#include "sti_compositor.h"
#include "sti_mixer.h"
#include "sti_vtg.h"
/* Module parameter to set the background color of the mixer */
static unsigned int bkg_color = 0x000000;
MODULE_PARM_DESC(bkgcolor, "Value of the background color 0xRRGGBB");
module_param_named(bkgcolor, bkg_color, int, 0644);
/* regs offset */
#define GAM_MIXER_CTL 0x00
#define GAM_MIXER_BKC 0x04
#define GAM_MIXER_BCO 0x0C
#define GAM_MIXER_BCS 0x10
#define GAM_MIXER_AVO 0x28
#define GAM_MIXER_AVS 0x2C
#define GAM_MIXER_CRB 0x34
#define GAM_MIXER_ACT 0x38
#define GAM_MIXER_MBP 0x3C
#define GAM_MIXER_MX0 0x80
/* id for depth of CRB reg */
#define GAM_DEPTH_VID0_ID 1
#define GAM_DEPTH_VID1_ID 2
#define GAM_DEPTH_GDP0_ID 3
#define GAM_DEPTH_GDP1_ID 4
#define GAM_DEPTH_GDP2_ID 5
#define GAM_DEPTH_GDP3_ID 6
#define GAM_DEPTH_MASK_ID 7
/* mask in CTL reg */
#define GAM_CTL_BACK_MASK BIT(0)
#define GAM_CTL_VID0_MASK BIT(1)
#define GAM_CTL_VID1_MASK BIT(2)
#define GAM_CTL_GDP0_MASK BIT(3)
#define GAM_CTL_GDP1_MASK BIT(4)
#define GAM_CTL_GDP2_MASK BIT(5)
#define GAM_CTL_GDP3_MASK BIT(6)
#define GAM_CTL_CURSOR_MASK BIT(9)
const char *sti_mixer_to_str(struct sti_mixer *mixer)
{
switch (mixer->id) {
case STI_MIXER_MAIN:
return "MAIN_MIXER";
case STI_MIXER_AUX:
return "AUX_MIXER";
default:
return "<UNKNOWN MIXER>";
}
}
static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id)
{
return readl(mixer->regs + reg_id);
}
static inline void sti_mixer_reg_write(struct sti_mixer *mixer,
u32 reg_id, u32 val)
{
writel(val, mixer->regs + reg_id);
}
#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
sti_mixer_reg_read(mixer, reg))
static void mixer_dbg_ctl(struct seq_file *s, int val)
{
unsigned int i;
int count = 0;
char *const disp_layer[] = {"BKG", "VID0", "VID1", "GDP0",
"GDP1", "GDP2", "GDP3"};
seq_puts(s, "\tEnabled: ");
for (i = 0; i < 7; i++) {
if (val & 1) {
seq_printf(s, "%s ", disp_layer[i]);
count++;
}
val = val >> 1;
}
val = val >> 2;
if (val & 1) {
seq_puts(s, "CURS ");
count++;
}
if (!count)
seq_puts(s, "Nothing");
}
static void mixer_dbg_crb(struct seq_file *s, int val)
{
int i;
seq_puts(s, "\tDepth: ");
for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
switch (val & GAM_DEPTH_MASK_ID) {
case GAM_DEPTH_VID0_ID:
seq_puts(s, "VID0");
break;
case GAM_DEPTH_VID1_ID:
seq_puts(s, "VID1");
break;
case GAM_DEPTH_GDP0_ID:
seq_puts(s, "GDP0");
break;
case GAM_DEPTH_GDP1_ID:
seq_puts(s, "GDP1");
break;
case GAM_DEPTH_GDP2_ID:
seq_puts(s, "GDP2");
break;
case GAM_DEPTH_GDP3_ID:
seq_puts(s, "GDP3");
break;
default:
seq_puts(s, "---");
}
if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1)
seq_puts(s, " < ");
val = val >> 3;
}
}
static void mixer_dbg_mxn(struct seq_file *s, void *addr)
{
int i;
for (i = 1; i < 8; i++)
seq_printf(s, "-0x%08X", (int)readl(addr + i * 4));
}
static int mixer_dbg_show(struct seq_file *s, void *arg)
{
struct drm_info_node *node = s->private;
struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data;
seq_printf(s, "%s: (vaddr = 0x%p)",
sti_mixer_to_str(mixer), mixer->regs);
DBGFS_DUMP(GAM_MIXER_CTL);
mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL));
DBGFS_DUMP(GAM_MIXER_BKC);
DBGFS_DUMP(GAM_MIXER_BCO);
DBGFS_DUMP(GAM_MIXER_BCS);
DBGFS_DUMP(GAM_MIXER_AVO);
DBGFS_DUMP(GAM_MIXER_AVS);
DBGFS_DUMP(GAM_MIXER_CRB);
mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
DBGFS_DUMP(GAM_MIXER_ACT);
DBGFS_DUMP(GAM_MIXER_MBP);
DBGFS_DUMP(GAM_MIXER_MX0);
mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
seq_putc(s, '\n');
return 0;
}
static struct drm_info_list mixer0_debugfs_files[] = {
{ "mixer_main", mixer_dbg_show, 0, NULL },
};
static struct drm_info_list mixer1_debugfs_files[] = {
{ "mixer_aux", mixer_dbg_show, 0, NULL },
};
int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor)
{
unsigned int i;
struct drm_info_list *mixer_debugfs_files;
int nb_files;
switch (mixer->id) {
case STI_MIXER_MAIN:
mixer_debugfs_files = mixer0_debugfs_files;
nb_files = ARRAY_SIZE(mixer0_debugfs_files);
break;
case STI_MIXER_AUX:
mixer_debugfs_files = mixer1_debugfs_files;
nb_files = ARRAY_SIZE(mixer1_debugfs_files);
break;
default:
return -EINVAL;
}
for (i = 0; i < nb_files; i++)
mixer_debugfs_files[i].data = mixer;
return drm_debugfs_create_files(mixer_debugfs_files,
nb_files,
minor->debugfs_root, minor);
}
void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable)
{
u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
val &= ~GAM_CTL_BACK_MASK;
val |= enable;
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
}
static void sti_mixer_set_background_color(struct sti_mixer *mixer,
unsigned int rgb)
{
sti_mixer_reg_write(mixer, GAM_MIXER_BKC, rgb);
}
static void sti_mixer_set_background_area(struct sti_mixer *mixer,
struct drm_display_mode *mode)
{
u32 ydo, xdo, yds, xds;
ydo = sti_vtg_get_line_number(*mode, 0);
yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
xdo = sti_vtg_get_pixel_number(*mode, 0);
xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo);
sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds);
}
int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane)
{
int plane_id, depth = plane->drm_plane.state->normalized_zpos;
unsigned int i;
u32 mask, val;
switch (plane->desc) {
case STI_GDP_0:
plane_id = GAM_DEPTH_GDP0_ID;
break;
case STI_GDP_1:
plane_id = GAM_DEPTH_GDP1_ID;
break;
case STI_GDP_2:
plane_id = GAM_DEPTH_GDP2_ID;
break;
case STI_GDP_3:
plane_id = GAM_DEPTH_GDP3_ID;
break;
case STI_HQVDP_0:
plane_id = GAM_DEPTH_VID0_ID;
break;
case STI_CURSOR:
/* no need to set depth for cursor */
return 0;
default:
DRM_ERROR("Unknown plane %d\n", plane->desc);
return 1;
}
/* Search if a previous depth was already assigned to the plane */
val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
mask = GAM_DEPTH_MASK_ID << (3 * i);
if ((val & mask) == plane_id << (3 * i))
break;
}
mask |= GAM_DEPTH_MASK_ID << (3 * depth);
plane_id = plane_id << (3 * depth);
DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer),
sti_plane_to_str(plane), depth);
dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n",
plane_id, mask);
val &= ~mask;
val |= plane_id;
sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val);
dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n",
sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
return 0;
}
int sti_mixer_active_video_area(struct sti_mixer *mixer,
struct drm_display_mode *mode)
{
u32 ydo, xdo, yds, xds;
ydo = sti_vtg_get_line_number(*mode, 0);
yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
xdo = sti_vtg_get_pixel_number(*mode, 0);
xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n",
sti_mixer_to_str(mixer), xdo, ydo, xds, yds);
sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo);
sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds);
sti_mixer_set_background_color(mixer, bkg_color);
sti_mixer_set_background_area(mixer, mode);
sti_mixer_set_background_status(mixer, true);
return 0;
}
static u32 sti_mixer_get_plane_mask(struct sti_plane *plane)
{
switch (plane->desc) {
case STI_BACK:
return GAM_CTL_BACK_MASK;
case STI_GDP_0:
return GAM_CTL_GDP0_MASK;
case STI_GDP_1:
return GAM_CTL_GDP1_MASK;
case STI_GDP_2:
return GAM_CTL_GDP2_MASK;
case STI_GDP_3:
return GAM_CTL_GDP3_MASK;
case STI_HQVDP_0:
return GAM_CTL_VID0_MASK;
case STI_CURSOR:
return GAM_CTL_CURSOR_MASK;
default:
return 0;
}
}
int sti_mixer_set_plane_status(struct sti_mixer *mixer,
struct sti_plane *plane, bool status)
{
u32 mask, val;
DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable",
sti_mixer_to_str(mixer), sti_plane_to_str(plane));
mask = sti_mixer_get_plane_mask(plane);
if (!mask) {
DRM_ERROR("Can't find layer mask\n");
return -EINVAL;
}
val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
val &= ~mask;
val |= status ? mask : 0;
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
return 0;
}
struct sti_mixer *sti_mixer_create(struct device *dev,
struct drm_device *drm_dev,
int id,
void __iomem *baseaddr)
{
struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL);
dev_dbg(dev, "%s\n", __func__);
if (!mixer) {
DRM_ERROR("Failed to allocated memory for mixer\n");
return NULL;
}
mixer->regs = baseaddr;
mixer->dev = dev;
mixer->id = id;
DRM_DEBUG_DRIVER("%s created. Regs=%p\n",
sti_mixer_to_str(mixer), mixer->regs);
return mixer;
}
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