rk3288: Auto-detect display.
We currently select either HDMI or EDP (default). This patch
allows us to use HDMI as a fallback for devices that may have
a display connected on either interface. It also renames the
enums to sound a little more sensible in other contexts (more
on that in the follow-up patches).
VOP_MODE_AUTO is added to the mode enum which will make it explicit
that a board can support either. In AUTO_MODE we will try EDP first
and then fallback to HDMI. Other modes can be set to force a certain
behavior such as HDMI-only on Mickey where it doesn't make sense to
try EDP.
A follow-up patch will add logic for when we explicitly don't want
to probe for any display (headless devices).
BUG=none
BRANCH=none
TEST=On veyron_danger, connected EDP and HDMI displays and saw dev
mode screen appear on EDP display. Unplugged EDP and then dev mode
screen showed up on HDMI.
Change-Id: I22b38031c4ab3d79fbb182f7a906da1197f35543
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 3f57ed3758c4e516d9fd226ad9499b102b81b423
Original-Change-Id: I352dcde16f7f3ebbf5796852b685685e541eb794
Original-Signed-off-by: David Hendricks <dhendrix@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/281076
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/10775
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/soc/rockchip/rk3288/display.c b/src/soc/rockchip/rk3288/display.c
index 192580b..ab297a2 100644
--- a/src/soc/rockchip/rk3288/display.c
+++ b/src/soc/rockchip/rk3288/display.c
@@ -46,6 +46,7 @@
struct soc_rockchip_rk3288_config *conf = dev->chip_info;
uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
+ enum vop_modes detected_mode = VOP_MODE_UNKNOWN;
printk(BIOS_SPEW, "LCD framebuffer @%p\n", (void *)(lcdbase));
memset((void *)lcdbase, 0, fb_size); /* clear the framebuffer */
@@ -53,26 +54,41 @@
mmu_config_range(lower / MiB, (upper - lower) / MiB, DCACHE_OFF);
switch (conf->vop_mode) {
- case HDMI_MODE:
- rkclk_configure_hdmi();
- rkclk_configure_vop_aclk(conf->vop_id, 384 * MHz);
- rk_hdmi_init(conf->vop_id);
- if (rk_hdmi_get_edid(&edid)) {
- printk(BIOS_WARNING, "can not get edid\n");
- return;
- }
- break;
-
- case EDP_MODE:
- default:
+ case VOP_MODE_AUTO_DETECT:
+ /* try EDP first, then HDMI */
+ case VOP_MODE_EDP:
+ printk(BIOS_DEBUG, "Attempting to setup EDP display.\n");
rkclk_configure_edp();
rkclk_configure_vop_aclk(conf->vop_id, 192 * MHz);
rk_edp_init(conf->vop_id);
- if (rk_edp_get_edid(&edid)) {
- printk(BIOS_WARNING, "can not get edid\n");
- return;
+
+ if (rk_edp_get_edid(&edid) == 0) {
+ detected_mode = VOP_MODE_EDP;
+ break;
+ } else {
+ printk(BIOS_WARNING, "Cannot get EDID from EDP.\n");
+ if (conf->vop_mode == VOP_MODE_EDP)
+ return;
}
- break;
+ /* fall thru */
+ case VOP_MODE_HDMI:
+ printk(BIOS_DEBUG, "Attempting to setup HDMI display.\n");
+ rkclk_configure_hdmi();
+ rkclk_configure_vop_aclk(conf->vop_id, 384 * MHz);
+ rk_hdmi_init(conf->vop_id);
+
+ if (rk_hdmi_get_edid(&edid) == 0) {
+ detected_mode = VOP_MODE_HDMI;
+ break;
+ } else {
+ printk(BIOS_WARNING, "Cannot get EDID from HDMI.\n");
+ if (conf->vop_mode == VOP_MODE_HDMI)
+ return;
+ }
+ /* fall thru */
+ default:
+ printk(BIOS_WARNING, "Cannot read any edid info, aborting.\n");
+ return;
}
if (rkclk_configure_vop_dclk(conf->vop_id, edid.pixel_clock * KHz)) {
@@ -84,12 +100,12 @@
edid.bytes_per_line = edid.ha * conf->framebuffer_bits_per_pixel / 8;
edid.x_resolution = edid.ha;
edid.y_resolution = edid.va;
- rkvop_mode_set(conf->vop_id, &edid, conf->vop_mode);
+ rkvop_mode_set(conf->vop_id, &edid, detected_mode);
rkvop_enable(conf->vop_id, lcdbase, &edid);
- switch (conf->vop_mode) {
- case HDMI_MODE:
+ switch (detected_mode) {
+ case VOP_MODE_HDMI:
if (rk_hdmi_enable(&edid)) {
printk(BIOS_WARNING, "hdmi enable err\n");
return;
@@ -103,7 +119,7 @@
mdelay(2000);
break;
- case EDP_MODE:
+ case VOP_MODE_EDP:
default:
if (rk_edp_enable()) {
printk(BIOS_WARNING, "edp enable err\n");