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rockchip/rk3399: display: Update edp initialization retry 

Follow on patch to clean up the previous retry code.
Previous patches:
coreboot commit 079b5c65
(rockchip/rk3399: display: Retry edp initialization if it fails)
cros commit 28c57a6e
(rockchip/rk3399: display: retry edp initialization if edp initial fail)

- Reduce the jumping around via goto statements
- Break the retry code out into a separate function that also
prints the error messages.

BRANCH=gru
BUG=chrome-os-partner:60150
TEST=Rebuild Kevin and Gru

Change-Id: I3b6cf572073e4dcac83da09621bafde179af2613
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17642
Tested-by: build bot (Jenkins)
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Martin Roth 2016-11-29 10:50:52 -07:00
parent fd5fa2ad1f
commit e4b9af15d8
1 changed files with 28 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
src/soc/rockchip/rk3399/display.c
View File

@ -36,6 +36,17 @@
#include "chip.h"
static void reset_edp(void)
{
/* rst edp */
write32(&cru_ptr->softrst_con[17],
RK_SETBITS(1 << 12 | 1 << 13));
udelay(1);
write32(&cru_ptr->softrst_con[17],
RK_CLRBITS(1 << 12 | 1 << 13));
printk(BIOS_WARNING, "Retrying epd initialization.\n");
}
void rk_display_init(device_t dev)
{
struct edid edid;
@ -65,14 +76,20 @@ void rk_display_init(device_t dev)
write32(&rk3399_grf->soc_con25, RK_SETBITS(1 << 11));
retry_edp:
rk_edp_init();
if (rk_edp_get_edid(&edid) == 0) {
detected_mode = VOP_MODE_EDP;
break;
while (retry_count++ < 3) {
rk_edp_init();
if (rk_edp_get_edid(&edid) == 0) {
detected_mode = VOP_MODE_EDP;
break;
}
if (retry_count == 3) {
printk(BIOS_WARNING, "Warning: epd initialization failed.\n");
return;
} else {
reset_edp();
}
}
goto edp_error;
/* fall thru */
break;
case VOP_MODE_HDMI:
printk(BIOS_WARNING, "HDMI display is NOT supported yet.\n");
return;
@ -100,24 +117,14 @@ retry_edp:
case VOP_MODE_EDP:
default:
/* will enable edp in depthcharge */
if (rk_edp_prepare())
goto edp_error;
if (rk_edp_prepare()) {
reset_edp();
goto retry_edp; /* Rerun entire init sequence */
}
mainboard_power_on_backlight();
break;
}
set_vbe_mode_info_valid(&edid, (uintptr_t)0);
return;
edp_error:
if (retry_count++ < 3) {
/* rst edp */
write32(&cru_ptr->softrst_con[17],
RK_SETBITS(1 << 12 | 1 << 13));
udelay(1);
write32(&cru_ptr->softrst_con[17],
RK_CLRBITS(1 << 12 | 1 << 13));
goto retry_edp;
}
printk(BIOS_WARNING, "epd initial error\n");
}