Commit 99f72472 authored by Hannes Petermaier's avatar Hannes Petermaier Committed by Tom Rini

board/BuR/tseries: Add simplefb support

Since the used AM3352 SoC doesn't have GPU it isn't allways necessary to build
in complete drm-stuff into linux kernel. In very small applications only we use
the simple-framebuffer.

So we have 2 use-cases:
- device operating on drm-driver (let simplefb node disabled)
- device operating on simplefb-driver (activate simplefb node and reserve mem)

The decision is made by means of "simplefb" environment variable.

simplefb = 0
we don't enable the (maybe) existing simplefb node and all the rest around
display is up to the linux-kernel. We just disable the backlight, beceause we
do not want see the flicker during take over of drm-driver.

simplefb = 1
we enable the (maybe) existing simplefb node and reserve framebuffers size
in memory.
Signed-off-by: default avatarHannes Petermaier <oe5hpm@oevsv.at>
parent 10c63f2e
......@@ -34,6 +34,7 @@
#include "bur_common.h"
#include "../../../drivers/video/am335x-fb.h"
#include <nand.h>
#include <fdt_simplefb.h>
static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
......@@ -47,6 +48,64 @@ DECLARE_GLOBAL_DATA_PTR;
/* --------------------------------------------------------------------------*/
#if defined(CONFIG_LCD) && defined(CONFIG_AM335X_LCD) && \
!defined(CONFIG_SPL_BUILD)
void lcdbacklight(int on)
{
#ifdef CONFIG_USE_FDT
if (gd->fdt_blob == NULL) {
printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
return;
}
unsigned int driver = FDTPROP(PATHINF, "brightdrv");
unsigned int bright = FDTPROP(PATHINF, "brightdef");
unsigned int pwmfrq = FDTPROP(PATHINF, "brightfdim");
#else
unsigned int driver = getenv_ulong("ds1_bright_drv", 16, 0UL);
unsigned int bright = getenv_ulong("ds1_bright_def", 10, 50);
unsigned int pwmfrq = getenv_ulong("ds1_pwmfreq", 10, ~0UL);
#endif
unsigned int tmp;
struct gptimer *const timerhw = (struct gptimer *)DM_TIMER6_BASE;
if (on)
bright = bright != ~0UL ? bright : 50;
else
bright = 0;
switch (driver) {
case 0: /* PMIC LED-Driver */
/* brightness level */
tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
TPS65217_WLEDCTRL2, bright, 0xFF);
/* current sink */
tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
TPS65217_WLEDCTRL1,
bright != 0 ? 0x0A : 0x02,
0xFF);
break;
case 1: /* PWM using timer6 */
if (pwmfrq != ~0UL) {
timerhw->tiocp_cfg = TCFG_RESET;
udelay(10);
while (timerhw->tiocp_cfg & TCFG_RESET)
;
tmp = ~0UL-(V_OSCK/pwmfrq); /* bottom value */
timerhw->tldr = tmp;
timerhw->tcrr = tmp;
tmp = tmp + ((V_OSCK/pwmfrq)/100) * bright;
timerhw->tmar = tmp;
timerhw->tclr = (TCLR_PT | (2 << TCLR_TRG_SHIFT) |
TCLR_CE | TCLR_AR | TCLR_ST);
} else {
puts("invalid pwmfrq in env/dtb! skip PWM-setup.\n");
}
break;
default:
puts("no suitable backlightdriver in env/dtb!\n");
break;
}
}
int load_lcdtiming(struct am335x_lcdpanel *panel)
{
struct am335x_lcdpanel pnltmp;
......@@ -304,6 +363,32 @@ int ft_board_setup(void *blob, bd_t *bd)
puts("set bootloader version 'bl-version' prop. not in dtb!\n");
return -1;
}
/*
* if no simplefb is requested through environment, we don't set up
* one, instead we turn off backlight.
*/
if (getenv_ulong("simplefb", 10, 0) == 0) {
lcdbacklight(0);
return 0;
}
/* Setup simplefb devicetree node, also adapt memory-node,
* upper limit for kernel e.g. linux is memtop-framebuffer alligned
* to a full megabyte.
*/
u64 start = gd->bd->bi_dram[0].start;
u64 size = (gd->fb_base - start) & ~0xFFFFF;
int rc = fdt_fixup_memory_banks(blob, &start, &size, 1);
if (rc) {
puts("cannot setup simplefb: Error reserving memory!\n");
return rc;
}
rc = lcd_dt_simplefb_enable_existing_node(blob);
if (rc) {
puts("cannot setup simplefb: error enabling simplefb node!\n");
return rc;
}
return 0;
}
#else
......@@ -412,55 +497,8 @@ void lcd_ctrl_init(void *lcdbase)
void lcd_enable(void)
{
#ifdef CONFIG_USE_FDT
if (gd->fdt_blob == NULL) {
printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
return;
}
unsigned int driver = FDTPROP(PATHINF, "brightdrv");
unsigned int bright = FDTPROP(PATHINF, "brightdef");
unsigned int pwmfrq = FDTPROP(PATHINF, "brightfdim");
#else
unsigned int driver = getenv_ulong("ds1_bright_drv", 16, 0UL);
unsigned int bright = getenv_ulong("ds1_bright_def", 10, 50);
unsigned int pwmfrq = getenv_ulong("ds1_pwmfreq", 10, ~0UL);
#endif
unsigned int tmp;
struct gptimer *const timerhw = (struct gptimer *)DM_TIMER6_BASE;
bright = bright != ~0UL ? bright : 50;
switch (driver) {
case 0: /* PMIC LED-Driver */
/* brightness level */
tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
TPS65217_WLEDCTRL2, bright, 0xFF);
/* turn on light */
tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
TPS65217_WLEDCTRL1, 0x0A, 0xFF);
break;
case 1: /* PWM using timer6 */
if (pwmfrq != ~0UL) {
timerhw->tiocp_cfg = TCFG_RESET;
udelay(10);
while (timerhw->tiocp_cfg & TCFG_RESET)
;
tmp = ~0UL-(V_OSCK/pwmfrq); /* bottom value */
timerhw->tldr = tmp;
timerhw->tcrr = tmp;
tmp = tmp + ((V_OSCK/pwmfrq)/100) * bright;
timerhw->tmar = tmp;
timerhw->tclr = (TCLR_PT | (2 << TCLR_TRG_SHIFT) |
TCLR_CE | TCLR_AR | TCLR_ST);
} else {
puts("invalid pwmfrq in env/dtb! skip PWM-setup.\n");
}
break;
default:
puts("no suitable backlightdriver in env/dtb!\n");
break;
}
br_summaryscreen();
lcdbacklight(1);
}
#elif CONFIG_SPL_BUILD
#else
......
......@@ -17,6 +17,7 @@
#define CONFIG_AM335X_LCD
#define CONFIG_LCD
#define CONFIG_LCD_ROTATION
#define CONFIG_LCD_DT_SIMPLEFB
#define CONFIG_SYS_WHITE_ON_BLACK
#define LCD_BPP LCD_COLOR32
......@@ -115,6 +116,7 @@
"bootz ${loadaddr} - ${dtbaddr}\0" \
"defboot=run nandboot\0" \
"bootlimit=1\0" \
"simplefb=1\0 " \
"altbootcmd=run usbscript\0"
#else
#define NANDARGS ""
......@@ -132,10 +134,12 @@
"mmcroot1=setenv bootargs ${optargs_rot} ${optargs} console=${console} " \
"root=/dev/mmcblk0p2 rootfstype=ext4\0" \
"mmcboot0=echo booting Updatesystem from mmc (ext4-fs) ...; " \
"setenv simplefb 1; " \
"ext4load mmc 0:1 ${loadaddr} /${kernel}; " \
"ext4load mmc 0:1 ${ramaddr} /${ramdisk}; " \
"run mmcroot0; bootz ${loadaddr} ${ramaddr} ${dtbaddr};\0" \
"mmcboot1=echo booting PPT-OS from mmc (ext4-fs) ...; " \
"setenv simplefb 0; " \
"ext4load mmc 0:2 ${loadaddr} /boot/${kernel}; " \
"run mmcroot1; bootz ${loadaddr} - ${dtbaddr};\0" \
"defboot=run logo0 || run logo1; " \
......
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