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video: omap: split the legacy code from the DM code

Browse Source 
The schedule for deprecating the features of the pre-driver-model puts
2019.17 as the deadline for the video subsystem. Furthermore, the latest
patches applied to the am335x-fb.c module have decreased the amount of
code shared with the pre-driver-model implementation. Splitting the two
implementations into two modules improves the readability of the code
and will make it easier to drop the pre-driver-model code.
I have not created a header file with the data structures and the
constants for accessing the LCD controller registers, but I preferred to
keep them inside the two c modules. This is a code replication until the
pre-driver-model version is dropped.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
This commit is contained in:
Dario Binacchi 2020-12-30 00:16:30 +01:00 committed by Lokesh Vutla
parent 91337f59dd
commit 35ab1b6ef7
7 changed files with 468 additions and 374 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/video/Makefile
View File

@ -16,7 +16,9 @@ obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o
obj-$(CONFIG_DM_VIDEO) += video_bmp.o
obj-$(CONFIG_PANEL) += panel-uclass.o
obj-$(CONFIG_SIMPLE_PANEL) += simple_panel.o
obj-$(CONFIG_AM335X_LCD) += tilcdc-panel.o
obj-$(CONFIG_AM335X_LCD) += tilcdc.o tilcdc-panel.o
else
obj-$(CONFIG_AM335X_LCD) += am335x-fb.o
endif
obj-${CONFIG_EXYNOS_FB} += exynos/
@ -24,7 +26,6 @@ obj-${CONFIG_VIDEO_ROCKCHIP} += rockchip/
obj-${CONFIG_VIDEO_STM32} += stm32/
obj-${CONFIG_VIDEO_TEGRA124} += tegra124/
obj-$(CONFIG_AM335X_LCD) += am335x-fb.o
obj-$(CONFIG_ATI_RADEON_FB) += ati_radeon_fb.o videomodes.o
obj-$(CONFIG_ATMEL_HLCD) += atmel_hlcdfb.o
obj-$(CONFIG_ATMEL_LCD) += atmel_lcdfb.o

335
drivers/video/am335x-fb.c
View File

@ -12,22 +12,16 @@
* - starts output DMA from gd->fb_base buffer
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <lcd.h>
#include <log.h>
#include <panel.h>
#include <video.h>
#include <asm/arch/clock.h>
#include <asm/arch/hardware.h>
#include <asm/arch/omap.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/utils.h>
#include <linux/delay.h>
#include <linux/err.h>
#include "am335x-fb.h"
#include "tilcdc-panel.h"
#define LCDC_FMAX 200000000
@ -115,8 +109,6 @@ struct am335x_lcdhw {
DECLARE_GLOBAL_DATA_PTR;
#if !CONFIG_IS_ENABLED(DM_VIDEO)
#if !defined(LCD_CNTL_BASE)
#error "hw-base address of LCD-Controller (LCD_CNTL_BASE) not defined!"
#endif
@ -323,330 +315,3 @@ int am335xfb_init(struct am335x_lcdpanel *panel)
return 0;
}
#else /* CONFIG_DM_VIDEO */
#define FBSIZE(t, p) (((t).hactive.typ * (t).vactive.typ * (p).bpp) >> 3)
enum {
LCD_MAX_WIDTH = 2048,
LCD_MAX_HEIGHT = 2048,
LCD_MAX_LOG2_BPP = VIDEO_BPP32,
};
struct am335x_fb_priv {
struct am335x_lcdhw *regs;
struct clk gclk;
struct clk dpll_m2_clk;
};
static ulong tilcdc_set_pixel_clk_rate(struct udevice *dev, ulong rate)
{
struct am335x_fb_priv *priv = dev_get_priv(dev);
struct am335x_lcdhw *regs = priv->regs;
ulong mult_rate, mult_round_rate, best_err, err;
u32 v;
int div, i;
best_err = rate;
div = 0;
for (i = 2; i <= 255; i++) {
mult_rate = rate * i;
mult_round_rate = clk_round_rate(&priv->gclk, mult_rate);
if (IS_ERR_VALUE(mult_round_rate))
return mult_round_rate;
err = mult_rate - mult_round_rate;
if (err < best_err) {
best_err = err;
div = i;
if (err == 0)
break;
}
}
if (div == 0) {
dev_err(dev, "failed to find a divisor\n");
return -EFAULT;
}
mult_rate = clk_set_rate(&priv->gclk, rate * div);
v = readl(&regs->ctrl) & ~LCDC_CTRL_CLK_DIVISOR_MASK;
v |= LCDC_CTRL_CLK_DIVISOR(div);
writel(v, &regs->ctrl);
rate = mult_rate / div;
dev_dbg(dev, "rate=%ld, div=%d, err=%ld\n", rate, div, err);
return rate;
}
static int am335x_fb_remove(struct udevice *dev)
{
struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
struct am335x_fb_priv *priv = dev_get_priv(dev);
uc_plat->base -= 0x20;
uc_plat->size += 0x20;
clk_release_all(&priv->gclk, 1);
clk_release_all(&priv->dpll_m2_clk, 1);
return 0;
}
static int am335x_fb_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 am335x_fb_priv *priv = dev_get_priv(dev);
struct am335x_lcdhw *regs = priv->regs;
struct udevice *panel, *clk_dev;
struct tilcdc_panel_info info;
struct display_timing timing;
ulong rate;
u32 reg;
int err;
/* Before relocation we don't need to do anything */
if (!(gd->flags & GD_FLG_RELOC))
return 0;
err = uclass_get_device(UCLASS_PANEL, 0, &panel);
if (err) {
dev_err(dev, "failed to get panel\n");
return err;
}
err = panel_get_display_timing(panel, &timing);
if (err) {
dev_err(dev, "failed to get display timing\n");
return err;
}
if (timing.pixelclock.typ > (LCDC_FMAX / 2)) {
dev_err(dev, "invalid display clock-frequency: %d Hz\n",
timing.pixelclock.typ);
return -EINVAL;
}
if (timing.hactive.typ > LCD_MAX_WIDTH)
timing.hactive.typ = LCD_MAX_WIDTH;
if (timing.vactive.typ > LCD_MAX_HEIGHT)
timing.vactive.typ = LCD_MAX_HEIGHT;
err = tilcdc_panel_get_display_info(panel, &info);
if (err) {
dev_err(dev, "failed to get panel info\n");
return err;
}
switch (info.bpp) {
case 16:
case 24:
case 32:
break;
default:
dev_err(dev, "invalid seting, bpp: %d\n", info.bpp);
return -EINVAL;
}
switch (info.dma_burst_sz) {
case 1:
case 2:
case 4:
case 8:
case 16:
break;
default:
dev_err(dev, "invalid setting, dma-burst-sz: %d\n",
info.dma_burst_sz);
return -EINVAL;
}
err = uclass_get_device_by_name(UCLASS_CLK, "lcd_gclk@534", &clk_dev);
if (err) {
dev_err(dev, "failed to get lcd_gclk device\n");
return err;
}
err = clk_request(clk_dev, &priv->gclk);
if (err) {
dev_err(dev, "failed to get %s clock\n", clk_dev->name);
return err;
}
rate = tilcdc_set_pixel_clk_rate(dev, timing.pixelclock.typ);
if (IS_ERR_VALUE(rate)) {
dev_err(dev, "failed to set pixel clock rate\n");
return rate;
}
err = uclass_get_device_by_name(UCLASS_CLK, "dpll_disp_m2_ck@4a4", &clk_dev);
if (err) {
dev_err(dev, "failed to get dpll_disp_m2 clock device\n");
return err;
}
err = clk_request(clk_dev, &priv->dpll_m2_clk);
if (err) {
dev_err(dev, "failed to get %s clock\n", clk_dev->name);
return err;
}
err = clk_set_parent(&priv->gclk, &priv->dpll_m2_clk);
if (err) {
dev_err(dev, "failed to set %s clock as %s's parent\n",
priv->dpll_m2_clk.dev->name, priv->gclk.dev->name);
return err;
}
/* palette default entry */
memset((void *)uc_plat->base, 0, 0x20);
*(unsigned int *)uc_plat->base = 0x4000;
/* point fb behind palette */
uc_plat->base += 0x20;
uc_plat->size -= 0x20;
writel(LCDC_CLKC_ENABLE_CORECLKEN | LCDC_CLKC_ENABLE_LIDDCLKEN |
LCDC_CLKC_ENABLE_DMACLKEN, &regs->clkc_enable);
writel(0, &regs->raster_ctrl);
reg = readl(&regs->ctrl) & LCDC_CTRL_CLK_DIVISOR_MASK;
reg |= LCDC_CTRL_RASTER_MODE;
writel(reg, &regs->ctrl);
writel(uc_plat->base, &regs->lcddma_fb0_base);
writel(uc_plat->base + FBSIZE(timing, info),
&regs->lcddma_fb0_ceiling);
writel(uc_plat->base, &regs->lcddma_fb1_base);
writel(uc_plat->base + FBSIZE(timing, info),
&regs->lcddma_fb1_ceiling);
reg = LCDC_DMA_CTRL_FIFO_TH(info.fifo_th);
switch (info.dma_burst_sz) {
case 1:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_1);
break;
case 2:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_2);
break;
case 4:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_4);
break;
case 8:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_8);
break;
case 16:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_16);
break;
}
writel(reg, &regs->lcddma_ctrl);
writel(LCDC_RASTER_TIMING_0_HORLSB(timing.hactive.typ) |
LCDC_RASTER_TIMING_0_HORMSB(timing.hactive.typ) |
LCDC_RASTER_TIMING_0_HFPLSB(timing.hfront_porch.typ) |
LCDC_RASTER_TIMING_0_HBPLSB(timing.hback_porch.typ) |
LCDC_RASTER_TIMING_0_HSWLSB(timing.hsync_len.typ),
&regs->raster_timing0);
writel(LCDC_RASTER_TIMING_1_VBP(timing.vback_porch.typ) |
LCDC_RASTER_TIMING_1_VFP(timing.vfront_porch.typ) |
LCDC_RASTER_TIMING_1_VSW(timing.vsync_len.typ) |
LCDC_RASTER_TIMING_1_VERLSB(timing.vactive.typ),
&regs->raster_timing1);
reg = LCDC_RASTER_TIMING_2_ACB(info.ac_bias) |
LCDC_RASTER_TIMING_2_ACBI(info.ac_bias_intrpt) |
LCDC_RASTER_TIMING_2_HSWMSB(timing.hsync_len.typ) |
LCDC_RASTER_TIMING_2_VERMSB(timing.vactive.typ) |
LCDC_RASTER_TIMING_2_HBPMSB(timing.hback_porch.typ) |
LCDC_RASTER_TIMING_2_HFPMSB(timing.hfront_porch.typ);
if (timing.flags & DISPLAY_FLAGS_VSYNC_LOW)
reg |= LCDC_RASTER_TIMING_2_VSYNC_INVERT;
if (timing.flags & DISPLAY_FLAGS_HSYNC_LOW)
reg |= LCDC_RASTER_TIMING_2_HSYNC_INVERT;
if (info.invert_pxl_clk)
reg |= LCDC_RASTER_TIMING_2_PXCLK_INVERT;
if (info.sync_edge)
reg |= LCDC_RASTER_TIMING_2_HSVS_RISEFALL;
if (info.sync_ctrl)
reg |= LCDC_RASTER_TIMING_2_HSVS_CONTROL;
writel(reg, &regs->raster_timing2);
reg = LCDC_RASTER_CTRL_PALMODE_RAWDATA | LCDC_RASTER_CTRL_TFT_MODE |
LCDC_RASTER_CTRL_ENABLE | LCDC_RASTER_CTRL_REQDLY(info.fdd);
if (info.tft_alt_mode)
reg |= LCDC_RASTER_CTRL_TFT_ALT_ENABLE;
if (info.bpp == 24)
reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE;
else if (info.bpp == 32)
reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE |
LCDC_RASTER_CTRL_TFT_24BPP_UNPACK;
if (info.raster_order)
reg |= LCDC_RASTER_CTRL_DATA_ORDER;
writel(reg, &regs->raster_ctrl);
uc_priv->xsize = timing.hactive.typ;
uc_priv->ysize = timing.vactive.typ;
uc_priv->bpix = log_2_n_round_up(info.bpp);
err = panel_enable_backlight(panel);
if (err) {
dev_err(dev, "failed to enable panel backlight\n");
return err;
}
return 0;
}
static int am335x_fb_ofdata_to_platdata(struct udevice *dev)
{
struct am335x_fb_priv *priv = dev_get_priv(dev);
priv->regs = (struct am335x_lcdhw *)dev_read_addr(dev);
if ((fdt_addr_t)priv->regs == FDT_ADDR_T_NONE) {
dev_err(dev, "failed to get base address\n");
return -EINVAL;
}
dev_dbg(dev, "LCD: base address=0x%x\n", (unsigned int)priv->regs);
return 0;
}
static int am335x_fb_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;
dev_dbg(dev, "frame buffer size 0x%x\n", uc_plat->size);
return 0;
}
static const struct udevice_id am335x_fb_ids[] = {
{ .compatible = "ti,am33xx-tilcdc" },
{ }
};
U_BOOT_DRIVER(am335x_fb) = {
.name = "am335x_fb",
.id = UCLASS_VIDEO,
.of_match = am335x_fb_ids,
.bind = am335x_fb_bind,
.of_to_plat = am335x_fb_of_to_plat,
.probe = am335x_fb_probe,
.remove = am335x_fb_remove,
.priv_auto = sizeof(struct am335x_fb_priv),
};
#endif /* CONFIG_DM_VIDEO */

35
drivers/video/am335x-fb.h
View File

@ -7,8 +7,6 @@
#ifndef AM335X_FB_H
#define AM335X_FB_H
#if !CONFIG_IS_ENABLED(DM_VIDEO)
#define HSVS_CONTROL BIT(25) /*
* 0 = lcd_lp and lcd_fp are driven on
* opposite edges of pixel clock than
@ -70,37 +68,4 @@ struct am335x_lcdpanel {
int am335xfb_init(struct am335x_lcdpanel *panel);
#else /* CONFIG_DM_VIDEO */
/**
* tilcdc_panel_info: Panel parameters
*
* @ac_bias: AC Bias Pin Frequency
* @ac_bias_intrpt: AC Bias Pin Transitions per Interrupt
* @dma_burst_sz: DMA burst size
* @bpp: Bits per pixel
* @fdd: FIFO DMA Request Delay
* @tft_alt_mode: TFT Alternative Signal Mapping (Only for active)
* @invert_pxl_clk: Invert pixel clock
* @sync_edge: Horizontal and Vertical Sync Edge: 0=rising 1=falling
* @sync_ctrl: Horizontal and Vertical Sync: Control: 0=ignore
* @raster_order: Raster Data Order Select: 1=Most-to-least 0=Least-to-most
* @fifo_th: DMA FIFO threshold
*/
struct tilcdc_panel_info {
u32 ac_bias;
u32 ac_bias_intrpt;
u32 dma_burst_sz;
u32 bpp;
u32 fdd;
bool tft_alt_mode;
bool invert_pxl_clk;
u32 sync_edge;
u32 sync_ctrl;
u32 raster_order;
u32 fifo_th;
};
#endif /* CONFIG_DM_VIDEO */
#endif /* AM335X_FB_H */

2
drivers/video/tilcdc-panel.c
View File

@ -15,7 +15,7 @@
#include <panel.h>
#include <asm/gpio.h>
#include <linux/err.h>
#include "am335x-fb.h"
#include "tilcdc.h"
struct tilcdc_panel_priv {
struct tilcdc_panel_info info;

2
drivers/video/tilcdc-panel.h
View File

@ -6,7 +6,7 @@
#ifndef _TILCDC_PANEL_H
#define _TILCDC_PANEL_H
#include "am335x-fb.h"
#include "tilcdc.h"
int tilcdc_panel_get_display_info(struct udevice *dev,
struct tilcdc_panel_info *info);

425
drivers/video/tilcdc.c Normal file
View File

@ -0,0 +1,425 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <lcd.h>
#include <log.h>
#include <panel.h>
#include <video.h>
#include <asm/io.h>
#include <asm/utils.h>
#include "tilcdc.h"
#include "tilcdc-panel.h"
#define LCDC_FMAX 200000000
/* LCD Control Register */
#define LCDC_CTRL_CLK_DIVISOR_MASK GENMASK(15, 8)
#define LCDC_CTRL_RASTER_MODE BIT(0)
#define LCDC_CTRL_CLK_DIVISOR(x) (((x) & GENMASK(7, 0)) << 8)
/* LCD Clock Enable Register */
#define LCDC_CLKC_ENABLE_CORECLKEN BIT(0)
#define LCDC_CLKC_ENABLE_LIDDCLKEN BIT(1)
#define LCDC_CLKC_ENABLE_DMACLKEN BIT(2)
/* LCD DMA Control Register */
#define LCDC_DMA_CTRL_BURST_SIZE(x) (((x) & GENMASK(2, 0)) << 4)
#define LCDC_DMA_CTRL_BURST_1 0x0
#define LCDC_DMA_CTRL_BURST_2 0x1
#define LCDC_DMA_CTRL_BURST_4 0x2
#define LCDC_DMA_CTRL_BURST_8 0x3
#define LCDC_DMA_CTRL_BURST_16 0x4
#define LCDC_DMA_CTRL_FIFO_TH(x) (((x) & GENMASK(2, 0)) << 8)
/* LCD Timing_0 Register */
#define LCDC_RASTER_TIMING_0_HORMSB(x) ((((x) - 1) & BIT(10)) >> 7)
#define LCDC_RASTER_TIMING_0_HORLSB(x) (((((x) >> 4) - 1) & GENMASK(5, 0)) << 4)
#define LCDC_RASTER_TIMING_0_HSWLSB(x) ((((x) - 1) & GENMASK(5, 0)) << 10)
#define LCDC_RASTER_TIMING_0_HFPLSB(x) ((((x) - 1) & GENMASK(7, 0)) << 16)
#define LCDC_RASTER_TIMING_0_HBPLSB(x) ((((x) - 1) & GENMASK(7, 0)) << 24)
/* LCD Timing_1 Register */
#define LCDC_RASTER_TIMING_1_VERLSB(x) (((x) - 1) & GENMASK(9, 0))
#define LCDC_RASTER_TIMING_1_VSW(x) ((((x) - 1) & GENMASK(5, 0)) << 10)
#define LCDC_RASTER_TIMING_1_VFP(x) (((x) & GENMASK(7, 0)) << 16)
#define LCDC_RASTER_TIMING_1_VBP(x) (((x) & GENMASK(7, 0)) << 24)
/* LCD Timing_2 Register */
#define LCDC_RASTER_TIMING_2_HFPMSB(x) ((((x) - 1) & GENMASK(9, 8)) >> 8)
#define LCDC_RASTER_TIMING_2_HBPMSB(x) ((((x) - 1) & GENMASK(9, 8)) >> 4)
#define LCDC_RASTER_TIMING_2_ACB(x) (((x) & GENMASK(7, 0)) << 8)
#define LCDC_RASTER_TIMING_2_ACBI(x) (((x) & GENMASK(3, 0)) << 16)
#define LCDC_RASTER_TIMING_2_VSYNC_INVERT BIT(20)
#define LCDC_RASTER_TIMING_2_HSYNC_INVERT BIT(21)
#define LCDC_RASTER_TIMING_2_PXCLK_INVERT BIT(22)
#define LCDC_RASTER_TIMING_2_DE_INVERT BIT(23)
#define LCDC_RASTER_TIMING_2_HSVS_RISEFALL BIT(24)
#define LCDC_RASTER_TIMING_2_HSVS_CONTROL BIT(25)
#define LCDC_RASTER_TIMING_2_VERMSB(x) ((((x) - 1) & BIT(10)) << 16)
#define LCDC_RASTER_TIMING_2_HSWMSB(x) ((((x) - 1) & GENMASK(9, 6)) << 21)
/* LCD Raster Ctrl Register */
#define LCDC_RASTER_CTRL_ENABLE BIT(0)
#define LCDC_RASTER_CTRL_TFT_MODE BIT(7)
#define LCDC_RASTER_CTRL_DATA_ORDER BIT(8)
#define LCDC_RASTER_CTRL_REQDLY(x) (((x) & GENMASK(7, 0)) << 12)
#define LCDC_RASTER_CTRL_PALMODE_RAWDATA (0x02 << 20)
#define LCDC_RASTER_CTRL_TFT_ALT_ENABLE BIT(23)
#define LCDC_RASTER_CTRL_TFT_24BPP_MODE BIT(25)
#define LCDC_RASTER_CTRL_TFT_24BPP_UNPACK BIT(26)
enum {
LCDC_MAX_WIDTH = 2048,
LCDC_MAX_HEIGHT = 2048,
LCDC_MAX_LOG2_BPP = VIDEO_BPP32,
};
struct tilcdc_regs {
u32 pid;
u32 ctrl;
u32 gap0;
u32 lidd_ctrl;
u32 lidd_cs0_conf;
u32 lidd_cs0_addr;
u32 lidd_cs0_data;
u32 lidd_cs1_conf;
u32 lidd_cs1_addr;
u32 lidd_cs1_data;
u32 raster_ctrl;
u32 raster_timing0;
u32 raster_timing1;
u32 raster_timing2;
u32 raster_subpanel;
u32 raster_subpanel2;
u32 lcddma_ctrl;
u32 lcddma_fb0_base;
u32 lcddma_fb0_ceiling;
u32 lcddma_fb1_base;
u32 lcddma_fb1_ceiling;
u32 sysconfig;
u32 irqstatus_raw;
u32 irqstatus;
u32 irqenable_set;
u32 irqenable_clear;
u32 gap1;
u32 clkc_enable;
u32 clkc_reset;
};
struct tilcdc_priv {
struct tilcdc_regs *regs;
struct clk gclk;
struct clk dpll_m2_clk;
};
DECLARE_GLOBAL_DATA_PTR;
static ulong tilcdc_set_pixel_clk_rate(struct udevice *dev, ulong rate)
{
struct tilcdc_priv *priv = dev_get_priv(dev);
struct tilcdc_regs *regs = priv->regs;
ulong mult_rate, mult_round_rate, best_err, err;
u32 v;
int div, i;
best_err = rate;
div = 0;
for (i = 2; i <= 255; i++) {
mult_rate = rate * i;
mult_round_rate = clk_round_rate(&priv->gclk, mult_rate);
if (IS_ERR_VALUE(mult_round_rate))
return mult_round_rate;
err = mult_rate - mult_round_rate;
if (err < best_err) {
best_err = err;
div = i;
if (err == 0)
break;
}
}
if (div == 0) {
dev_err(dev, "failed to find a divisor\n");
return -EFAULT;
}
mult_rate = clk_set_rate(&priv->gclk, rate * div);
v = readl(&regs->ctrl) & ~LCDC_CTRL_CLK_DIVISOR_MASK;
v |= LCDC_CTRL_CLK_DIVISOR(div);
writel(v, &regs->ctrl);
rate = mult_rate / div;
dev_dbg(dev, "rate=%ld, div=%d, err=%ld\n", rate, div, err);
return rate;
}
static int tilcdc_remove(struct udevice *dev)
{
struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
struct tilcdc_priv *priv = dev_get_priv(dev);
uc_plat->base -= 0x20;
uc_plat->size += 0x20;
clk_release_all(&priv->gclk, 1);
clk_release_all(&priv->dpll_m2_clk, 1);
return 0;
}
static int tilcdc_probe(struct udevice *dev)
{
struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
struct tilcdc_priv *priv = dev_get_priv(dev);
struct tilcdc_regs *regs = priv->regs;
struct udevice *panel, *clk_dev;
struct tilcdc_panel_info info;
struct display_timing timing;
ulong rate;
u32 reg;
int err;
/* Before relocation we don't need to do anything */
if (!(gd->flags & GD_FLG_RELOC))
return 0;
err = uclass_get_device(UCLASS_PANEL, 0, &panel);
if (err) {
dev_err(dev, "failed to get panel\n");
return err;
}
err = panel_get_display_timing(panel, &timing);
if (err) {
dev_err(dev, "failed to get display timing\n");
return err;
}
if (timing.pixelclock.typ > (LCDC_FMAX / 2)) {
dev_err(dev, "invalid display clock-frequency: %d Hz\n",
timing.pixelclock.typ);
return -EINVAL;
}
if (timing.hactive.typ > LCDC_MAX_WIDTH)
timing.hactive.typ = LCDC_MAX_WIDTH;
if (timing.vactive.typ > LCDC_MAX_HEIGHT)
timing.vactive.typ = LCDC_MAX_HEIGHT;
err = tilcdc_panel_get_display_info(panel, &info);
if (err) {
dev_err(dev, "failed to get panel info\n");
return err;
}
switch (info.bpp) {
case 16:
case 24:
case 32:
break;
default:
dev_err(dev, "invalid seting, bpp: %d\n", info.bpp);
return -EINVAL;
}
switch (info.dma_burst_sz) {
case 1:
case 2:
case 4:
case 8:
case 16:
break;
default:
dev_err(dev, "invalid setting, dma-burst-sz: %d\n",
info.dma_burst_sz);
return -EINVAL;
}
err = uclass_get_device_by_name(UCLASS_CLK, "lcd_gclk@534", &clk_dev);
if (err) {
dev_err(dev, "failed to get lcd_gclk device\n");
return err;
}
err = clk_request(clk_dev, &priv->gclk);
if (err) {
dev_err(dev, "failed to get %s clock\n", clk_dev->name);
return err;
}
rate = tilcdc_set_pixel_clk_rate(dev, timing.pixelclock.typ);
if (IS_ERR_VALUE(rate)) {
dev_err(dev, "failed to set pixel clock rate\n");
return rate;
}
err = uclass_get_device_by_name(UCLASS_CLK, "dpll_disp_m2_ck@4a4",
&clk_dev);
if (err) {
dev_err(dev, "failed to get dpll_disp_m2 clock device\n");
return err;
}
err = clk_request(clk_dev, &priv->dpll_m2_clk);
if (err) {
dev_err(dev, "failed to get %s clock\n", clk_dev->name);
return err;
}
err = clk_set_parent(&priv->gclk, &priv->dpll_m2_clk);
if (err) {
dev_err(dev, "failed to set %s clock as %s's parent\n",
priv->dpll_m2_clk.dev->name, priv->gclk.dev->name);
return err;
}
/* palette default entry */
memset((void *)uc_plat->base, 0, 0x20);
*(unsigned int *)uc_plat->base = 0x4000;
/* point fb behind palette */
uc_plat->base += 0x20;
uc_plat->size -= 0x20;
writel(LCDC_CLKC_ENABLE_CORECLKEN | LCDC_CLKC_ENABLE_LIDDCLKEN |
LCDC_CLKC_ENABLE_DMACLKEN, &regs->clkc_enable);
writel(0, &regs->raster_ctrl);
reg = readl(&regs->ctrl) & LCDC_CTRL_CLK_DIVISOR_MASK;
reg |= LCDC_CTRL_RASTER_MODE;
writel(reg, &regs->ctrl);
reg = (timing.hactive.typ * timing.vactive.typ * info.bpp) >> 3;
reg += uc_plat->base;
writel(uc_plat->base, &regs->lcddma_fb0_base);
writel(reg, &regs->lcddma_fb0_ceiling);
writel(uc_plat->base, &regs->lcddma_fb1_base);
writel(reg, &regs->lcddma_fb1_ceiling);
reg = LCDC_DMA_CTRL_FIFO_TH(info.fifo_th);
switch (info.dma_burst_sz) {
case 1:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_1);
break;
case 2:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_2);
break;
case 4:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_4);
break;
case 8:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_8);
break;
case 16:
reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_16);
break;
}
writel(reg, &regs->lcddma_ctrl);
writel(LCDC_RASTER_TIMING_0_HORLSB(timing.hactive.typ) |
LCDC_RASTER_TIMING_0_HORMSB(timing.hactive.typ) |
LCDC_RASTER_TIMING_0_HFPLSB(timing.hfront_porch.typ) |
LCDC_RASTER_TIMING_0_HBPLSB(timing.hback_porch.typ) |
LCDC_RASTER_TIMING_0_HSWLSB(timing.hsync_len.typ),
&regs->raster_timing0);
writel(LCDC_RASTER_TIMING_1_VBP(timing.vback_porch.typ) |
LCDC_RASTER_TIMING_1_VFP(timing.vfront_porch.typ) |
LCDC_RASTER_TIMING_1_VSW(timing.vsync_len.typ) |
LCDC_RASTER_TIMING_1_VERLSB(timing.vactive.typ),
&regs->raster_timing1);
reg = LCDC_RASTER_TIMING_2_ACB(info.ac_bias) |
LCDC_RASTER_TIMING_2_ACBI(info.ac_bias_intrpt) |
LCDC_RASTER_TIMING_2_HSWMSB(timing.hsync_len.typ) |
LCDC_RASTER_TIMING_2_VERMSB(timing.vactive.typ) |
LCDC_RASTER_TIMING_2_HBPMSB(timing.hback_porch.typ) |
LCDC_RASTER_TIMING_2_HFPMSB(timing.hfront_porch.typ);
if (timing.flags & DISPLAY_FLAGS_VSYNC_LOW)
reg |= LCDC_RASTER_TIMING_2_VSYNC_INVERT;
if (timing.flags & DISPLAY_FLAGS_HSYNC_LOW)
reg |= LCDC_RASTER_TIMING_2_HSYNC_INVERT;
if (info.invert_pxl_clk)
reg |= LCDC_RASTER_TIMING_2_PXCLK_INVERT;
if (info.sync_edge)
reg |= LCDC_RASTER_TIMING_2_HSVS_RISEFALL;
if (info.sync_ctrl)
reg |= LCDC_RASTER_TIMING_2_HSVS_CONTROL;
writel(reg, &regs->raster_timing2);
reg = LCDC_RASTER_CTRL_PALMODE_RAWDATA | LCDC_RASTER_CTRL_TFT_MODE |
LCDC_RASTER_CTRL_ENABLE | LCDC_RASTER_CTRL_REQDLY(info.fdd);
if (info.tft_alt_mode)
reg |= LCDC_RASTER_CTRL_TFT_ALT_ENABLE;
if (info.bpp == 24)
reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE;
else if (info.bpp == 32)
reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE |
LCDC_RASTER_CTRL_TFT_24BPP_UNPACK;
if (info.raster_order)
reg |= LCDC_RASTER_CTRL_DATA_ORDER;
writel(reg, &regs->raster_ctrl);
uc_priv->xsize = timing.hactive.typ;
uc_priv->ysize = timing.vactive.typ;
uc_priv->bpix = log_2_n_round_up(info.bpp);
err = panel_enable_backlight(panel);
if (err) {
dev_err(dev, "failed to enable panel backlight\n");
return err;
}
return 0;
}
static int tilcdc_of_to_plat(struct udevice *dev)
{
struct tilcdc_priv *priv = dev_get_priv(dev);
priv->regs = (struct tilcdc_regs *)dev_read_addr(dev);
if ((fdt_addr_t)priv->regs == FDT_ADDR_T_NONE) {
dev_err(dev, "failed to get base address\n");
return -EINVAL;
}
dev_dbg(dev, "LCD: base address=0x%x\n", (unsigned int)priv->regs);
return 0;
}
static int tilcdc_bind(struct udevice *dev)
{
struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
uc_plat->size = ((LCDC_MAX_WIDTH * LCDC_MAX_HEIGHT *
(1 << LCDC_MAX_LOG2_BPP)) >> 3) + 0x20;
dev_dbg(dev, "frame buffer size 0x%x\n", uc_plat->size);
return 0;
}
static const struct udevice_id tilcdc_ids[] = {
{.compatible = "ti,am33xx-tilcdc"},
{}
};
U_BOOT_DRIVER(tilcdc) = {
.name = "tilcdc",
.id = UCLASS_VIDEO,
.of_match = tilcdc_ids,
.bind = tilcdc_bind,
.ofdata_to_platdata = tilcdc_of_to_plat,
.probe = tilcdc_probe,
.remove = tilcdc_remove,
.priv_auto = sizeof(struct tilcdc_priv)
};

38
drivers/video/tilcdc.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
*/
#ifndef _TILCDC_H
#define _TILCDC_H
/**
* tilcdc_panel_info: Panel parameters
*
* @ac_bias: AC Bias Pin Frequency
* @ac_bias_intrpt: AC Bias Pin Transitions per Interrupt
* @dma_burst_sz: DMA burst size
* @bpp: Bits per pixel
* @fdd: FIFO DMA Request Delay
* @tft_alt_mode: TFT Alternative Signal Mapping (Only for active)
* @invert_pxl_clk: Invert pixel clock
* @sync_edge: Horizontal and Vertical Sync Edge: 0=rising 1=falling
* @sync_ctrl: Horizontal and Vertical Sync: Control: 0=ignore
* @raster_order: Raster Data Order Select: 1=Most-to-least 0=Least-to-most
* @fifo_th: DMA FIFO threshold
*/
struct tilcdc_panel_info {
u32 ac_bias;
u32 ac_bias_intrpt;
u32 dma_burst_sz;
u32 bpp;
u32 fdd;
bool tft_alt_mode;
bool invert_pxl_clk;
u32 sync_edge;
u32 sync_ctrl;
u32 raster_order;
u32 fifo_th;
};
#endif /* _TILCDC_H */