[coreboot-gerrit] Change in coreboot[master]: DEBUG: ANX read edid test

[yongqiang niu (Code Review)]

yongqiang niu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/46837 )

Change subject: DEBUG: ANX read edid test
......................................................................

DEBUG: ANX read edid test

Signed-off-by: Yongqiang Niu 
Change-Id: Icaaf8d7a96d40839947beeb0b6d50521b314b91a
---
M src/drivers/analogix/anx7625/anx7625.c
1 file changed, 28 insertions(+), 11 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/37/46837/1

diff --git a/src/drivers/analogix/anx7625/anx7625.c b/src/drivers/analogix/anx7625/anx7625.c
index 1f04346..121075a 100644
--- a/src/drivers/analogix/anx7625/anx7625.c
+++ b/src/drivers/analogix/anx7625/anx7625.c
@@ -848,24 +848,41 @@
    0x2d, 0x45, 0x41, 0x31, 0x0a, 0x20, 0x00, 0xea,
 };

+static void anx7625_read_ver(uint8_t bus)
+{
+	uint8_t version, revision;
+
+	anx7625_reg_read(bus, RX_P0_ADDR, OCM_FW_VERSION, &version);
+	anx7625_reg_read(bus, RX_P0_ADDR, OCM_FW_REVERSION, &revision);
+
+	ANXINFO("OCM : ver %#02x, rev %#02x.\n", version, revision);
+}
+
 int anx7625_dp_get_edid(uint8_t bus, struct edid *out)
 {
    int block_num;
    int ret;
    u8 edid[FOUR_BLOCK_SIZE];

-	/* Something goes terribly wrong here, and ANX7625 does not seem to be able to recover from it. */
-	block_num = sp_tx_edid_read(bus, edid, FOUR_BLOCK_SIZE);
-	if (block_num <= 0) {
-		block_num = 1;
-		memcpy(edid, &edp_edid, sizeof(edp_edid));
-		ANXINFO("Failed to get eDP EDID, test with hard code edied.\n");
-	}
+	anx7625_read_ver(bus);
+	ANXINFO("first time read edid\n");
+	sp_tx_edid_read(bus, edid, FOUR_BLOCK_SIZE);
+	ANXERROR("get eDP EDID at 1st time done.\n");

-	if (block_num < 0) {
-		ANXERROR("Failed to get eDP EDID.\n");
-		return -1;
-	}
+	anx7625_read_ver(bus);
+	ANXINFO("2nd time read edid\n");
+	sp_tx_edid_read(bus, edid, FOUR_BLOCK_SIZE);
+	ANXERROR("get eDP EDID at 2nd time done.\n");
+
+	anx7625_read_ver(bus);
+	ANXINFO("3rd time read edid\n");
+	sp_tx_edid_read(bus, edid, FOUR_BLOCK_SIZE);
+	ANXERROR("get eDP EDID at 3rd time done.\n");
+	anx7625_read_ver(bus);
+
+	ANXINFO("use fixed edid\n");
+	block_num = 0;
+	memcpy(edid, &edp_edid, sizeof(edp_edid));

ret = decode_edid(edid, (block_num + 1) * ONE_BLOCK_SIZE, out);
    if (ret != EDID_CONFORMANT) {