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u-boot/drivers/video/tidss/tidss_drv.c
Nikhil M Jain 5f9f816bb8 drivers: video: tidss: TIDSS video driver support for AM62x 
Added tidss video driver support which enables display
on oldi panel using AM62x, it creates a simple pipeline
framebuffer==>vidl1==>ovr1==>vp1==>oldi_panel and
calculates clock rates for panel from panel node in
device tree.

To compile TIDSS when user sets CONFIG_VIDEO_TIDSS
add rule in Makefile. Include tidss folder location
in Kconfig.

TIDSS is ported from linux kernel version 5.10.145

Signed-off-by: Nikhil M Jain <n-jain1@ti.com>
2023-02-04 18:16:30 +01:00

943 lines
23 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2023 Texas Instruments Incorporated - https://www.ti.com/
* Nikhil M Jain, n-jain1@ti.com
*
* based on the linux tidss driver, which is
*
* (C) Copyright 2018 Texas Instruments Incorporated - https://www.ti.com/
* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
*/
#include <common.h>
#include <dm.h>
#include <clk.h>
#include <log.h>
#include <video.h>
#include <errno.h>
#include <panel.h>
#include <reset.h>
#include <malloc.h>
#include <fdtdec.h>
#include <syscon.h>
#include <regmap.h>
#include <cpu_func.h>
#include <media_bus_format.h>
#include <asm/io.h>
#include <asm/cache.h>
#include <asm/utils.h>
#include <asm/bitops.h>
#include <dm/devres.h>
#include <dm/of_access.h>
#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include "tidss_drv.h"
#include "tidss_regs.h"
DECLARE_GLOBAL_DATA_PTR;
/* Panel parameters */
enum {
LCD_MAX_WIDTH = 1920,
LCD_MAX_HEIGHT = 1200,
LCD_MAX_LOG2_BPP = VIDEO_BPP32,
};
static const u16 *dss_common_regmap;
static const u16 tidss_am62x_common_regs[DSS_COMMON_REG_TABLE_LEN] = {
[DSS_REVISION_OFF] = 0x4,
[DSS_SYSCONFIG_OFF] = 0x8,
[DSS_SYSSTATUS_OFF] = 0x20,
[DSS_IRQ_EOI_OFF] = 0x24,
[DSS_IRQSTATUS_RAW_OFF] = 0x28,
[DSS_IRQSTATUS_OFF] = 0x2c,
[DSS_IRQENABLE_SET_OFF] = 0x30,
[DSS_IRQENABLE_CLR_OFF] = 0x40,
[DSS_VID_IRQENABLE_OFF] = 0x44,
[DSS_VID_IRQSTATUS_OFF] = 0x58,
[DSS_VP_IRQENABLE_OFF] = 0x70,
[DSS_VP_IRQSTATUS_OFF] = 0x7c,
[WB_IRQENABLE_OFF] = 0x88,
[WB_IRQSTATUS_OFF] = 0x8c,
[DSS_GLOBAL_MFLAG_ATTRIBUTE_OFF] = 0x90,
[DSS_GLOBAL_OUTPUT_ENABLE_OFF] = 0x94,
[DSS_GLOBAL_BUFFER_OFF] = 0x98,
[DSS_CBA_CFG_OFF] = 0x9c,
[DSS_DBG_CONTROL_OFF] = 0xa0,
[DSS_DBG_STATUS_OFF] = 0xa4,
[DSS_CLKGATING_DISABLE_OFF] = 0xa8,
[DSS_SECURE_DISABLE_OFF] = 0xac,
};
/* TIDSS AM62x Features */
const struct dss_features dss_am625_feats = {
.max_pclk_khz = {
[DSS_VP_DPI] = 165000,
[DSS_VP_OLDI] = 165000,
},
.subrev = DSS_AM625,
.common = "common",
.common_regs = tidss_am62x_common_regs,
.num_vps = 2,
.vp_name = { "vp1", "vp2" },
.ovr_name = { "ovr1", "ovr2" },
.vpclk_name = { "vp1", "vp2" },
.vp_bus_type = { DSS_VP_OLDI, DSS_VP_DPI },
.vp_feat = { .color = {
.has_ctm = true,
.gamma_size = 256,
.gamma_type = TIDSS_GAMMA_8BIT,
},
},
.num_planes = 2,
/* note: vid is plane_id 0 and vidl1 is plane_id 1 */
.vid_name = { "vidl1", "vid1" },
.vid_lite = { true, false },
.vid_order = { 1, 0 },
};
/* Wrapper functions to write and read TI_DSS registers */
static void dss_write(struct tidss_drv_priv *priv, u16 reg, u32 val)
{
writel(val, priv->base_common + reg);
}
static u32 dss_read(struct tidss_drv_priv *priv, u16 reg)
{
return readl(priv->base_common + reg);
}
static void dss_vid_write(struct tidss_drv_priv *priv, u32 hw_plane, u16 reg, u32 val)
{
void __iomem *base = priv->base_vid[hw_plane];
writel(val, base + reg);
}
static u32 dss_vid_read(struct tidss_drv_priv *priv, u32 hw_plane, u16 reg)
{
void __iomem *base = priv->base_vid[hw_plane];
return readl(base + reg);
}
static void dss_ovr_write(struct tidss_drv_priv *priv, u32 hw_videoport,
u16 reg, u32 val)
{
void __iomem *base = priv->base_ovr[hw_videoport];
writel(val, base + reg);
}
static u32 dss_ovr_read(struct tidss_drv_priv *priv, u32 hw_videoport, u16 reg)
{
void __iomem *base = priv->base_ovr[hw_videoport];
return readl(base + reg);
}
static void dss_vp_write(struct tidss_drv_priv *priv, u32 hw_videoport,
u16 reg, u32 val)
{
void __iomem *base = priv->base_vp[hw_videoport];
writel(val, base + reg);
}
static u32 dss_vp_read(struct tidss_drv_priv *priv, u32 hw_videoport, u16 reg)
{
void __iomem *base = priv->base_vp[hw_videoport];
return readl(base + reg);
}
/* generate mask on a register */
static u32 FLD_MASK(u32 start, u32 end)
{
return ((1 << (start - end + 1)) - 1) << end;
}
/* set the given val in specified range */
static u32 FLD_VAL(u32 val, u32 start, u32 end)
{
return (val << end) & FLD_MASK(start, end);
}
/* return the value in the specified range */
static u32 FLD_GET(u32 val, u32 start, u32 end)
{
return (val & FLD_MASK(start, end)) >> end;
}
/* modify the value of the specified range */
static u32 FLD_MOD(u32 orig, u32 val, u32 start, u32 end)
{
return (orig & ~FLD_MASK(start, end)) | FLD_VAL(val, start, end);
}
/* read and modify common register region of DSS*/
__maybe_unused
static u32 REG_GET(struct tidss_drv_priv *priv, u32 idx, u32 start, u32 end)
{
return FLD_GET(dss_read(priv, idx), start, end);
}
static void REG_FLD_MOD(struct tidss_drv_priv *priv, u32 idx, u32 val,
u32 start, u32 end)
{
dss_write(priv, idx, FLD_MOD(dss_read(priv, idx), val,
start, end));
}
/* read and modify planes vid1 and vid2 register of DSS*/
static u32 VID_REG_GET(struct tidss_drv_priv *priv, u32 hw_plane, u32 idx,
u32 start, u32 end)
{
return FLD_GET(dss_vid_read(priv, hw_plane, idx), start, end);
}
static void VID_REG_FLD_MOD(struct tidss_drv_priv *priv, u32 hw_plane, u32 idx,
u32 val, u32 start, u32 end)
{
dss_vid_write(priv, hw_plane, idx,
FLD_MOD(dss_vid_read(priv, hw_plane, idx),
val, start, end));
}
/* read and modify port vid1 and vid2 registers of DSS*/
__maybe_unused
static u32 VP_REG_GET(struct tidss_drv_priv *priv, u32 vp, u32 idx,
u32 start, u32 end)
{
return FLD_GET(dss_vp_read(priv, vp, idx), start, end);
}
static void VP_REG_FLD_MOD(struct tidss_drv_priv *priv, u32 vp, u32 idx, u32 val,
u32 start, u32 end)
{
dss_vp_write(priv, vp, idx, FLD_MOD(dss_vp_read(priv, vp, idx),
val, start, end));
}
/* read and modify overlay ovr1 and ovr2 registers of DSS*/
__maybe_unused
static u32 OVR_REG_GET(struct tidss_drv_priv *priv, u32 ovr, u32 idx,
u32 start, u32 end)
{
return FLD_GET(dss_ovr_read(priv, ovr, idx), start, end);
}
static void OVR_REG_FLD_MOD(struct tidss_drv_priv *priv, u32 ovr, u32 idx,
u32 val, u32 start, u32 end)
{
dss_ovr_write(priv, ovr, idx, FLD_MOD(dss_ovr_read(priv, ovr, idx),
val, start, end));
}
static void dss_oldi_tx_power(struct tidss_drv_priv *priv, bool power)
{
u32 val;
if (WARN_ON(!priv->oldi_io_ctrl))
return;
if (priv->feat->subrev == DSS_AM625) {
if (power) {
switch (priv->oldi_mode) {
case OLDI_SINGLE_LINK_SINGLE_MODE:
/* Power down OLDI TX 1 */
val = OLDI1_PWRDN_TX;
break;
case OLDI_DUAL_LINK:
/* No Power down */
val = 0;
break;
default:
/* Power down both the OLDI TXes */
val = OLDI_BANDGAP_PWR | OLDI0_PWRDN_TX | OLDI1_PWRDN_TX;
break;
}
} else {
val = OLDI_BANDGAP_PWR | OLDI0_PWRDN_TX | OLDI1_PWRDN_TX;
}
regmap_update_bits(priv->oldi_io_ctrl, OLDI_PD_CTRL,
OLDI_BANDGAP_PWR | OLDI0_PWRDN_TX | OLDI1_PWRDN_TX, val);
}
}
static void dss_set_num_datalines(struct tidss_drv_priv *priv,
u32 hw_videoport)
{
int v;
u32 num_lines = priv->bus_format->data_width;
switch (num_lines) {
case 12:
v = 0; break;
case 16:
v = 1; break;
case 18:
v = 2; break;
case 24:
v = 3; break;
case 30:
v = 4; break;
case 36:
v = 5; break;
default:
WARN_ON(1);
v = 3;
}
VP_REG_FLD_MOD(priv, hw_videoport, DSS_VP_CONTROL, v, 10, 8);
}
static void dss_enable_oldi(struct tidss_drv_priv *priv, u32 hw_videoport)
{
u32 oldi_cfg = 0;
u32 oldi_reset_bit = BIT(5 + hw_videoport);
int count = 0;
/*
* For the moment MASTERSLAVE, and SRC bits of DSS_VP_DSS_OLDI_CFG are
* set statically to 0.
*/
if (priv->bus_format->data_width == 24)
oldi_cfg |= BIT(8); /* MSB */
else if (priv->bus_format->data_width != 18)
dev_warn(priv->dev, "%s: %d port width not supported\n",
__func__, priv->bus_format->data_width);
oldi_cfg |= BIT(7); /* DEPOL */
oldi_cfg = FLD_MOD(oldi_cfg, priv->bus_format->oldi_mode_reg_val, 3, 1);
oldi_cfg |= BIT(12); /* SOFTRST */
oldi_cfg |= BIT(0); /* ENABLE */
switch (priv->oldi_mode) {
case OLDI_MODE_OFF:
oldi_cfg &= ~BIT(0); /* DISABLE */
break;
case OLDI_SINGLE_LINK_SINGLE_MODE:
/* All configuration is done for this mode. */
break;
case OLDI_SINGLE_LINK_DUPLICATE_MODE:
oldi_cfg |= BIT(5); /* DUPLICATE MODE */
break;
case OLDI_DUAL_LINK:
oldi_cfg |= BIT(11); /* DUALMODESYNC */
oldi_cfg |= BIT(3); /* data-mapping field also indicates dual-link mode */
break;
default:
dev_warn(priv->dev, "%s: Incorrect oldi mode. Returning.\n",
__func__);
return;
}
dss_vp_write(priv, hw_videoport, DSS_VP_DSS_OLDI_CFG, oldi_cfg);
while (!(oldi_reset_bit & dss_read(priv, DSS_SYSSTATUS)) &&
count < 10000)
count++;
if (!(oldi_reset_bit & dss_read(priv, DSS_SYSSTATUS)))
dev_warn(priv->dev, "%s: timeout waiting OLDI reset done\n",
__func__);
}
static const struct dss_color_lut dss_vp_gamma_default_lut[] = {
{ .red = 0, .green = 0, .blue = 0, },
{ .red = U16_MAX, .green = U16_MAX, .blue = U16_MAX, },
};
static void dss_vp_write_gamma_table(struct tidss_drv_priv *priv,
u32 hw_videoport)
{
u32 *table = priv->vp_data[hw_videoport].gamma_table;
u32 hwlen = priv->feat->vp_feat.color.gamma_size;
unsigned int i;
dev_dbg(priv->dev, "%s: hw_videoport %d\n", __func__, hw_videoport);
for (i = 0; i < hwlen; ++i) {
u32 v = table[i];
v |= i << 24;
dss_vp_write(priv, hw_videoport, DSS_VP_GAMMA_TABLE, v);
}
}
static void dss_vp_set_gamma(struct tidss_drv_priv *priv,
u32 hw_videoport, const struct dss_color_lut *lut,
unsigned int length)
{
u32 *table = priv->vp_data[hw_videoport].gamma_table;
u32 hwlen = priv->feat->vp_feat.color.gamma_size;
u32 hwbits;
unsigned int i;
dev_dbg(priv->dev, "%s: hw_videoport %d, lut len %u, hw len %u\n",
__func__, hw_videoport, length, hwlen);
if (priv->feat->vp_feat.color.gamma_type == TIDSS_GAMMA_10BIT)
hwbits = 10;
else
hwbits = 8;
lut = dss_vp_gamma_default_lut;
length = ARRAY_SIZE(dss_vp_gamma_default_lut);
for (i = 0; i < length - 1; ++i) {
unsigned int first = i * (hwlen - 1) / (length - 1);
unsigned int last = (i + 1) * (hwlen - 1) / (length - 1);
unsigned int w = last - first;
u16 r, g, b;
unsigned int j;
if (w == 0)
continue;
for (j = 0; j <= w; j++) {
r = (lut[i].red * (w - j) + lut[i + 1].red * j) / w;
g = (lut[i].green * (w - j) + lut[i + 1].green * j) / w;
b = (lut[i].blue * (w - j) + lut[i + 1].blue * j) / w;
r >>= 16 - hwbits;
g >>= 16 - hwbits;
b >>= 16 - hwbits;
table[first + j] = (r << (hwbits * 2)) |
(g << hwbits) | b;
}
}
dss_vp_write_gamma_table(priv, hw_videoport);
}
void dss_vp_enable(struct tidss_drv_priv *priv, u32 hw_videoport, struct display_timing *timing)
{
bool align, onoff, rf, ieo, ipc, ihs, ivs;
u32 hsw, hfp, hbp, vsw, vfp, vbp;
dss_set_num_datalines(priv, hw_videoport);
/* panel parameters to set clocks for video port*/
hfp = timing->hfront_porch.typ;
hsw = timing->hsync_len.typ;
hbp = timing->hback_porch.typ;
vfp = timing->vfront_porch.typ;
vsw = timing->vsync_len.typ;
vbp = timing->vback_porch.typ;
dss_vp_write(priv, hw_videoport, DSS_VP_TIMING_H,
FLD_VAL(hsw - 1, 7, 0) |
FLD_VAL(hfp - 1, 19, 8) | FLD_VAL(hbp - 1, 31, 20));
dss_vp_write(priv, hw_videoport, DSS_VP_TIMING_V,
FLD_VAL(vsw - 1, 7, 0) |
FLD_VAL(vfp, 19, 8) | FLD_VAL(vbp, 31, 20));
ivs = !!(timing->flags & (1 << 3));
ihs = !!(timing->flags & (1 << 1));
ieo = 0;
ipc = 0;
/* always use the 'rf' setting */
onoff = true;
rf = true;
/* always use aligned syncs */
align = true;
/* always use DE_HIGH for OLDI */
if (priv->feat->vp_bus_type[hw_videoport] == DSS_VP_OLDI)
ieo = false;
dss_vp_write(priv, hw_videoport, DSS_VP_POL_FREQ,
FLD_VAL(align, 18, 18) |
FLD_VAL(onoff, 17, 17) |
FLD_VAL(rf, 16, 16) |
FLD_VAL(ieo, 15, 15) |
FLD_VAL(ipc, 14, 14) |
FLD_VAL(ihs, 13, 13) |
FLD_VAL(ivs, 12, 12));
dss_vp_write(priv, hw_videoport, DSS_VP_SIZE_SCREEN,
FLD_VAL(timing->hactive.typ - 1, 11, 0) |
FLD_VAL(timing->vactive.typ - 1, 27, 16));
VP_REG_FLD_MOD(priv, hw_videoport, DSS_VP_CONTROL, 1, 0, 0);
}
enum c8_to_c12_mode { C8_TO_C12_REPLICATE, C8_TO_C12_MAX, C8_TO_C12_MIN };
static u16 c8_to_c12(u8 c8, enum c8_to_c12_mode mode)
{
u16 c12;
c12 = c8 << 4;
switch (mode) {
case C8_TO_C12_REPLICATE:
/* Copy c8 4 MSB to 4 LSB for full scale c12 */
c12 |= c8 >> 4;
break;
case C8_TO_C12_MAX:
c12 |= 0xF;
break;
default:
case C8_TO_C12_MIN:
break;
}
return c12;
}
static u64 argb8888_to_argb12121212(u32 argb8888, enum c8_to_c12_mode m)
{
u8 a, r, g, b;
u64 v;
a = (argb8888 >> 24) & 0xff;
r = (argb8888 >> 16) & 0xff;
g = (argb8888 >> 8) & 0xff;
b = (argb8888 >> 0) & 0xff;
v = ((u64)c8_to_c12(a, m) << 36) | ((u64)c8_to_c12(r, m) << 24) |
((u64)c8_to_c12(g, m) << 12) | (u64)c8_to_c12(b, m);
return v;
}
static void dss_vp_set_default_color(struct tidss_drv_priv *priv,
u32 hw_videoport, u32 default_color)
{
u64 v;
v = argb8888_to_argb12121212(default_color, C8_TO_C12_REPLICATE);
dss_ovr_write(priv, hw_videoport,
DSS_OVR_DEFAULT_COLOR, v & 0xffffffff);
dss_ovr_write(priv, hw_videoport,
DSS_OVR_DEFAULT_COLOR2, (v >> 32) & 0xffff);
}
int dss_vp_enable_clk(struct tidss_drv_priv *priv, u32 hw_videoport)
{
int ret = clk_prepare_enable(&priv->vp_clk[hw_videoport]);
if (ret)
dev_dbg(priv->dev, "%s: enabling clk failed: %d\n", __func__,
ret);
return ret;
}
void dss_vp_prepare(struct tidss_drv_priv *priv, u32 hw_videoport)
{
dss_vp_set_gamma(priv, hw_videoport, NULL, 0);
dss_vp_set_default_color(priv, 0, 0);
if (priv->feat->vp_bus_type[hw_videoport] == DSS_VP_OLDI) {
dss_oldi_tx_power(priv, true);
dss_enable_oldi(priv, hw_videoport);
}
}
static
unsigned int dss_pclk_diff(unsigned long rate, unsigned long real_rate)
{
int r = rate / 100, rr = real_rate / 100;
return (unsigned int)(abs(((rr - r) * 100) / r));
}
int dss_vp_set_clk_rate(struct tidss_drv_priv *priv, u32 hw_videoport,
unsigned long rate)
{
int r;
unsigned long new_rate;
/*
* For AM625 OLDI video ports, the requested pixel clock needs to take into account the
* serial clock required for the serialization of DPI signals into LVDS signals. The
* incoming pixel clock on the OLDI video port gets divided by 7 whenever OLDI enable bit
* gets set.
*/
if (priv->feat->vp_bus_type[hw_videoport] == DSS_VP_OLDI &&
priv->feat->subrev == DSS_AM625)
rate *= 7;
r = clk_set_rate(&priv->vp_clk[hw_videoport], rate);
new_rate = clk_get_rate(&priv->vp_clk[hw_videoport]);
if (dss_pclk_diff(rate, new_rate) > 5)
dev_warn(priv->dev,
"vp%d: Clock rate %lu differs over 5%% from requested %lu\n",
hw_videoport, new_rate, rate);
dev_dbg(priv->dev, "vp%d: new rate %lu Hz (requested %lu Hz)\n",
hw_videoport, clk_get_rate(&priv->vp_clk[hw_videoport]), rate);
return 0;
}
static void dss_ovr_set_plane(struct tidss_drv_priv *priv,
u32 hw_plane, u32 hw_ovr,
u32 x, u32 y, u32 layer)
{
OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
0x1, 4, 1);
OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
x, 17, 6);
OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
y, 30, 19);
}
void dss_ovr_enable_layer(struct tidss_drv_priv *priv,
u32 hw_ovr, u32 layer, bool enable)
{
OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
!!enable, 0, 0);
}
static void dss_vid_csc_enable(struct tidss_drv_priv *priv, u32 hw_plane,
bool enable)
{
VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, !!enable, 9, 9);
}
int dss_plane_setup(struct tidss_drv_priv *priv, u32 hw_plane, u32 hw_videoport)
{
VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES,
priv->pixel_format, 6, 1);
dss_vid_write(priv, hw_plane, DSS_VID_PICTURE_SIZE,
((LCD_MAX_WIDTH - 1) | ((LCD_MAX_HEIGHT - 1) << 16)));
dss_vid_csc_enable(priv, hw_plane, false);
dss_vid_write(priv, hw_plane, DSS_VID_GLOBAL_ALPHA, 0xFF);
VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, 1, 28, 28);
return 0;
}
int dss_plane_enable(struct tidss_drv_priv *priv, u32 hw_plane, bool enable)
{
VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, !!enable, 0, 0);
return 0;
}
static u32 dss_vid_get_fifo_size(struct tidss_drv_priv *priv, u32 hw_plane)
{
return VID_REG_GET(priv, hw_plane, DSS_VID_BUF_SIZE_STATUS, 15, 0);
}
static void dss_vid_set_mflag_threshold(struct tidss_drv_priv *priv,
u32 hw_plane, u32 low, u32 high)
{
dss_vid_write(priv, hw_plane, DSS_VID_MFLAG_THRESHOLD,
FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0));
}
static
void dss_vid_set_buf_threshold(struct tidss_drv_priv *priv,
u32 hw_plane, u32 low, u32 high)
{
dss_vid_write(priv, hw_plane, DSS_VID_BUF_THRESHOLD,
FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0));
}
static void dss_plane_init(struct tidss_drv_priv *priv)
{
unsigned int hw_plane;
u32 cba_lo_pri = 1;
u32 cba_hi_pri = 0;
REG_FLD_MOD(priv, DSS_CBA_CFG, cba_lo_pri, 2, 0);
REG_FLD_MOD(priv, DSS_CBA_CFG, cba_hi_pri, 5, 3);
/* MFLAG_CTRL = ENABLED */
REG_FLD_MOD(priv, DSS_GLOBAL_MFLAG_ATTRIBUTE, 2, 1, 0);
/* MFLAG_START = MFLAGNORMALSTARTMODE */
REG_FLD_MOD(priv, DSS_GLOBAL_MFLAG_ATTRIBUTE, 0, 6, 6);
for (hw_plane = 0; hw_plane < priv->feat->num_planes; hw_plane++) {
u32 size = dss_vid_get_fifo_size(priv, hw_plane);
u32 thr_low, thr_high;
u32 mflag_low, mflag_high;
u32 preload;
thr_high = size - 1;
thr_low = size / 2;
mflag_high = size * 2 / 3;
mflag_low = size / 3;
preload = thr_low;
dev_dbg(priv->dev,
"%s: bufsize %u, buf_threshold %u/%u, mflag threshold %u/%u preload %u\n",
priv->feat->vid_name[hw_plane],
size,
thr_high, thr_low,
mflag_high, mflag_low,
preload);
dss_vid_set_buf_threshold(priv, hw_plane,
thr_low, thr_high);
dss_vid_set_mflag_threshold(priv, hw_plane,
mflag_low, mflag_high);
dss_vid_write(priv, hw_plane, DSS_VID_PRELOAD, preload);
/* Prefech up to PRELOAD value */
VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, 0,
19, 19);
}
}
static void dss_vp_init(struct tidss_drv_priv *priv)
{
unsigned int i;
/* Enable the gamma Shadow bit-field for all VPs*/
for (i = 0; i < priv->feat->num_vps; i++)
VP_REG_FLD_MOD(priv, i, DSS_VP_CONFIG, 1, 2, 2);
}
static int dss_init_am65x_oldi_io_ctrl(struct udevice *dev,
struct tidss_drv_priv *priv)
{
struct udevice *syscon;
struct regmap *regmap;
int ret = 0;
ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, "ti,am65x-oldi-io-ctrl",
&syscon);
if (ret) {
debug("unable to find ti,am65x-oldi-io-ctrl syscon device (%d)\n", ret);
return ret;
}
/* get grf-reg base address */
regmap = syscon_get_regmap(syscon);
if (!regmap) {
debug("unable to find rockchip grf regmap\n");
return -ENODEV;
}
priv->oldi_io_ctrl = regmap;
return 0;
}
static int tidss_drv_probe(struct udevice *dev)
{
struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
struct tidss_drv_priv *priv = dev_get_priv(dev);
struct udevice *panel = NULL;
struct display_timing timings;
unsigned int i;
int ret = 0;
const char *mode;
priv->dev = dev;
priv->feat = &dss_am625_feats;
/*
* set your plane format based on your bmp image
* Supported 24bpp and 32bpp bmpimages
*/
priv->pixel_format = DSS_FORMAT_XRGB8888;
dss_common_regmap = priv->feat->common_regs;
ret = uclass_first_device_err(UCLASS_PANEL, &panel);
if (ret) {
if (ret != -ENODEV)
dev_err(dev, "panel device error %d\n", ret);
return ret;
}
ret = panel_get_display_timing(panel, &timings);
if (ret) {
ret = ofnode_decode_panel_timing(dev_ofnode(panel),
&timings);
if (ret) {
dev_err(dev, "decode display timing error %d\n", ret);
return ret;
}
}
mode = ofnode_read_string(dev_ofnode(panel), "data-mapping");
if (!mode) {
debug("%s: Could not read mode property\n", dev->name);
return -EINVAL;
}
uc_priv->bpix = VIDEO_BPP32;
if (!strcmp(mode, "vesa-24"))
priv->bus_format = &dss_bus_formats[7];
else
priv->bus_format = &dss_bus_formats[8];
/* Common address */
priv->base_common = dev_remap_addr_index(dev, 0);
if (!priv->base_common)
return -EINVAL;
/* plane address setup and enable */
for (i = 0; i < priv->feat->num_planes; i++) {
priv->base_vid[i] = dev_remap_addr_index(dev, i + 2);
if (!priv->base_vid[i])
return -EINVAL;
}
dss_vid_write(priv, 0, DSS_VID_BA_0, uc_plat->base & 0xffffffff);
dss_vid_write(priv, 0, DSS_VID_BA_EXT_0, (u64)uc_plat->base >> 32);
dss_vid_write(priv, 0, DSS_VID_BA_1, uc_plat->base & 0xffffffff);
dss_vid_write(priv, 0, DSS_VID_BA_EXT_1, (u64)uc_plat->base >> 32);
ret = dss_plane_setup(priv, 0, 0);
if (ret) {
dss_plane_enable(priv, 0, false);
return ret;
}
dss_plane_enable(priv, 0, true);
dss_plane_init(priv);
/* video port address clocks and enable */
for (i = 0; i < priv->feat->num_vps; i++) {
priv->base_ovr[i] = dev_remap_addr_index(dev, i + 4);
priv->base_vp[i] = dev_remap_addr_index(dev, i + 6);
}
ret = clk_get_by_name(dev, "vp1", &priv->vp_clk[0]);
if (ret) {
dev_err(dev, "video port %d clock enable error %d\n", i, ret);
return ret;
}
dss_ovr_set_plane(priv, 1, 0, 0, 0, 0);
dss_ovr_enable_layer(priv, 0, 0, true);
/* Video Port cloks */
dss_vp_enable_clk(priv, 0);
dss_vp_set_clk_rate(priv, 0, timings.pixelclock.typ * 1000);
priv->oldi_mode = OLDI_MODE_OFF;
uc_priv->xsize = timings.hactive.typ;
uc_priv->ysize = timings.vactive.typ;
if (priv->feat->subrev == DSS_AM65X || priv->feat->subrev == DSS_AM625) {
priv->oldi_mode = OLDI_DUAL_LINK;
if (priv->oldi_mode) {
ret = dss_init_am65x_oldi_io_ctrl(dev, priv);
if (ret)
return ret;
}
}
dss_vp_prepare(priv, 0);
dss_vp_enable(priv, 0, &timings);
dss_vp_init(priv);
ret = clk_get_by_name(dev, "fck", &priv->fclk);
if (ret) {
dev_err(dev, "peripheral clock get error %d\n", ret);
return ret;
}
ret = clk_enable(&priv->fclk);
if (ret) {
dev_err(dev, "peripheral clock enable error %d\n", ret);
return ret;
}
if (IS_ERR(&priv->fclk)) {
dev_err(dev, "%s: Failed to get fclk: %ld\n",
__func__, PTR_ERR(&priv->fclk));
return PTR_ERR(&priv->fclk);
}
dev_dbg(dev, "DSS fclk %lu Hz\n", clk_get_rate(&priv->fclk));
video_set_flush_dcache(dev, true);
return 0;
}
static int tidss_drv_remove(struct udevice *dev)
{
u32 val;
int ret;
struct tidss_drv_priv *priv = dev_get_priv(dev);
priv->base_common = dev_remap_addr_index(dev, 0);
REG_FLD_MOD(priv, DSS_SYSCONFIG, 1, 1, 1);
/* Wait for reset to complete */
ret = readl_poll_timeout(priv->base_common + DSS_SYSSTATUS,
val, val & 1, 5000);
if (ret) {
dev_warn(priv->dev, "failed to reset priv\n");
return ret;
}
return 0;
}
static int tidss_drv_bind(struct udevice *dev)
{
struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
uc_plat->size = ((LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
(1 << LCD_MAX_LOG2_BPP)) >> 3) + 0x20;
return 0;
}
static const struct udevice_id tidss_drv_ids[] = {
{ .compatible = "ti,am625-dss" },
{ }
};
U_BOOT_DRIVER(tidss_drv) = {
.name = "tidss_drv",
.id = UCLASS_VIDEO,
.of_match = tidss_drv_ids,
.bind = tidss_drv_bind,
.probe = tidss_drv_probe,
.remove = tidss_drv_remove,
.priv_auto = sizeof(struct tidss_drv_priv),
.flags = DM_FLAG_OS_PREPARE,
};
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