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>
diff --git a/board/BuR/common/common.c b/board/BuR/common/common.c
index 3036f86..5b356fb 100644
--- a/board/BuR/common/common.c
+++ b/board/BuR/common/common.c
@@ -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 @@
/* --------------------------------------------------------------------------*/
#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 @@
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_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