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: Hannes Petermaier <oe5hpm@oevsv.at>
This commit is contained in:
Hannes Petermaier
Tom Rini
parent
10c63f2ebe
commit
99f7247211
@ -34,6 +34,7 @@
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#include "bur_common.h"
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#include "../../../drivers/video/am335x-fb.h"
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#include <nand.h>
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#include <fdt_simplefb.h>
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static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
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@ -47,6 +48,64 @@ DECLARE_GLOBAL_DATA_PTR;
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/* --------------------------------------------------------------------------*/
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#if defined(CONFIG_LCD) && defined(CONFIG_AM335X_LCD) && \
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!defined(CONFIG_SPL_BUILD)
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void lcdbacklight(int on)
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{
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#ifdef CONFIG_USE_FDT
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if (gd->fdt_blob == NULL) {
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printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
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return;
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}
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unsigned int driver = FDTPROP(PATHINF, "brightdrv");
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unsigned int bright = FDTPROP(PATHINF, "brightdef");
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unsigned int pwmfrq = FDTPROP(PATHINF, "brightfdim");
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#else
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unsigned int driver = getenv_ulong("ds1_bright_drv", 16, 0UL);
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unsigned int bright = getenv_ulong("ds1_bright_def", 10, 50);
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unsigned int pwmfrq = getenv_ulong("ds1_pwmfreq", 10, ~0UL);
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#endif
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unsigned int tmp;
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struct gptimer *const timerhw = (struct gptimer *)DM_TIMER6_BASE;
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if (on)
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bright = bright != ~0UL ? bright : 50;
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else
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bright = 0;
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switch (driver) {
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case 0: /* PMIC LED-Driver */
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/* brightness level */
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tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
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TPS65217_WLEDCTRL2, bright, 0xFF);
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/* current sink */
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tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
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TPS65217_WLEDCTRL1,
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bright != 0 ? 0x0A : 0x02,
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0xFF);
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break;
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case 1: /* PWM using timer6 */
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if (pwmfrq != ~0UL) {
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timerhw->tiocp_cfg = TCFG_RESET;
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udelay(10);
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while (timerhw->tiocp_cfg & TCFG_RESET)
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;
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tmp = ~0UL-(V_OSCK/pwmfrq); /* bottom value */
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timerhw->tldr = tmp;
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timerhw->tcrr = tmp;
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tmp = tmp + ((V_OSCK/pwmfrq)/100) * bright;
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timerhw->tmar = tmp;
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timerhw->tclr = (TCLR_PT | (2 << TCLR_TRG_SHIFT) |
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TCLR_CE | TCLR_AR | TCLR_ST);
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} else {
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puts("invalid pwmfrq in env/dtb! skip PWM-setup.\n");
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}
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break;
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default:
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puts("no suitable backlightdriver in env/dtb!\n");
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break;
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}
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}
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int load_lcdtiming(struct am335x_lcdpanel *panel)
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{
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struct am335x_lcdpanel pnltmp;
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@ -304,6 +363,32 @@ int ft_board_setup(void *blob, bd_t *bd)
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puts("set bootloader version 'bl-version' prop. not in dtb!\n");
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return -1;
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}
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/*
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* if no simplefb is requested through environment, we don't set up
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* one, instead we turn off backlight.
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*/
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if (getenv_ulong("simplefb", 10, 0) == 0) {
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lcdbacklight(0);
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return 0;
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}
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/* Setup simplefb devicetree node, also adapt memory-node,
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* upper limit for kernel e.g. linux is memtop-framebuffer alligned
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* to a full megabyte.
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*/
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u64 start = gd->bd->bi_dram[0].start;
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u64 size = (gd->fb_base - start) & ~0xFFFFF;
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int rc = fdt_fixup_memory_banks(blob, &start, &size, 1);
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if (rc) {
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puts("cannot setup simplefb: Error reserving memory!\n");
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return rc;
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}
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rc = lcd_dt_simplefb_enable_existing_node(blob);
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if (rc) {
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puts("cannot setup simplefb: error enabling simplefb node!\n");
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return rc;
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}
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return 0;
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}
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#else
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@ -412,55 +497,8 @@ void lcd_ctrl_init(void *lcdbase)
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void lcd_enable(void)
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{
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#ifdef CONFIG_USE_FDT
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if (gd->fdt_blob == NULL) {
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printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
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return;
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}
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unsigned int driver = FDTPROP(PATHINF, "brightdrv");
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unsigned int bright = FDTPROP(PATHINF, "brightdef");
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unsigned int pwmfrq = FDTPROP(PATHINF, "brightfdim");
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#else
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unsigned int driver = getenv_ulong("ds1_bright_drv", 16, 0UL);
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unsigned int bright = getenv_ulong("ds1_bright_def", 10, 50);
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unsigned int pwmfrq = getenv_ulong("ds1_pwmfreq", 10, ~0UL);
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#endif
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unsigned int tmp;
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struct gptimer *const timerhw = (struct gptimer *)DM_TIMER6_BASE;
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bright = bright != ~0UL ? bright : 50;
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switch (driver) {
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case 0: /* PMIC LED-Driver */
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/* brightness level */
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tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
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TPS65217_WLEDCTRL2, bright, 0xFF);
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/* turn on light */
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tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
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TPS65217_WLEDCTRL1, 0x0A, 0xFF);
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break;
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case 1: /* PWM using timer6 */
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if (pwmfrq != ~0UL) {
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timerhw->tiocp_cfg = TCFG_RESET;
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udelay(10);
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while (timerhw->tiocp_cfg & TCFG_RESET)
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;
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tmp = ~0UL-(V_OSCK/pwmfrq); /* bottom value */
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timerhw->tldr = tmp;
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timerhw->tcrr = tmp;
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tmp = tmp + ((V_OSCK/pwmfrq)/100) * bright;
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timerhw->tmar = tmp;
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timerhw->tclr = (TCLR_PT | (2 << TCLR_TRG_SHIFT) |
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TCLR_CE | TCLR_AR | TCLR_ST);
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} else {
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puts("invalid pwmfrq in env/dtb! skip PWM-setup.\n");
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}
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break;
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default:
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puts("no suitable backlightdriver in env/dtb!\n");
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break;
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}
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br_summaryscreen();
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lcdbacklight(1);
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}
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#elif CONFIG_SPL_BUILD
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#else
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@ -17,6 +17,7 @@
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#define CONFIG_AM335X_LCD
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#define CONFIG_LCD
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#define CONFIG_LCD_ROTATION
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#define CONFIG_LCD_DT_SIMPLEFB
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#define CONFIG_SYS_WHITE_ON_BLACK
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#define LCD_BPP LCD_COLOR32
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@ -115,6 +116,7 @@
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"bootz ${loadaddr} - ${dtbaddr}\0" \
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"defboot=run nandboot\0" \
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"bootlimit=1\0" \
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"simplefb=1\0 " \
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"altbootcmd=run usbscript\0"
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#else
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#define NANDARGS ""
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@ -132,10 +134,12 @@
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"mmcroot1=setenv bootargs ${optargs_rot} ${optargs} console=${console} " \
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"root=/dev/mmcblk0p2 rootfstype=ext4\0" \
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"mmcboot0=echo booting Updatesystem from mmc (ext4-fs) ...; " \
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"setenv simplefb 1; " \
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"ext4load mmc 0:1 ${loadaddr} /${kernel}; " \
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"ext4load mmc 0:1 ${ramaddr} /${ramdisk}; " \
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"run mmcroot0; bootz ${loadaddr} ${ramaddr} ${dtbaddr};\0" \
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"mmcboot1=echo booting PPT-OS from mmc (ext4-fs) ...; " \
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"setenv simplefb 0; " \
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"ext4load mmc 0:2 ${loadaddr} /boot/${kernel}; " \
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"run mmcroot1; bootz ${loadaddr} - ${dtbaddr};\0" \
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"defboot=run logo0 || run logo1; " \
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