ref: 79c7e4514d90b4d8584c7e3be8a05f89b538c7b7
parent: 9c02337fc30994d69e979748743d61b2e97d45ce
author: Michael Forney <mforney@mforney.org>
date: Wed Mar 2 05:26:38 EST 2022
igfx: fix FDI link training on ironlake Ironlake uses bits 29:28 in the RX control register to select the training pattern.
--- a/sys/src/cmd/aux/vga/igfx.c
+++ b/sys/src/cmd/aux/vga/igfx.c
@@ -1465,12 +1465,17 @@
/* unmask bit lock and symbol lock bits */
csr(igfx, p->fdi->rximr.a, 3<<8, 0);
- p->fdi->txctl.v &= ~(3<<28); /* link train pattern1 */
- p->fdi->txctl.v |= 1<<31; /* enable */
- loadreg(igfx, p->fdi->txctl);
+ /* enable fdi */
+ p->fdi->txctl.v |= 1<<31;
+ p->fdi->rxctl.v |= 1<<31;
- p->fdi->rxctl.v &= ~(3<<8); /* link train pattern1 */
- p->fdi->rxctl.v |= 1<<31; /* enable */
+ /* switch to link train pattern1 */
+ p->fdi->txctl.v &= ~(3<<28);
+ loadreg(igfx, p->fdi->txctl);
+ if(igfx->type == TypeILK)
+ p->fdi->rxctl.v &= ~(3<<28);
+ else
+ p->fdi->rxctl.v &= ~(3<<8);
loadreg(igfx, p->fdi->rxctl);
/* wait for bit lock */
@@ -1480,10 +1485,13 @@
break;
}
csr(igfx, p->fdi->rxiir.a, 0, 1<<8);
-
+
/* switch to link train pattern2 */
csr(igfx, p->fdi->txctl.a, 3<<28, 1<<28);
- csr(igfx, p->fdi->rxctl.a, 3<<8, 1<<8);
+ if(igfx->type == TypeILK)
+ csr(igfx, p->fdi->rxctl.a, 3<<28, 1<<28);
+ else
+ csr(igfx, p->fdi->rxctl.a, 3<<8, 1<<8);
/* wait for symbol lock */
for(i=0; i<10; i++){@@ -1495,7 +1503,10 @@
/* switch to link train normal */
csr(igfx, p->fdi->txctl.a, 0, 3<<28);
- csr(igfx, p->fdi->rxctl.a, 0, 3<<8);
+ if(igfx->type == TypeILK)
+ csr(igfx, p->fdi->rxctl.a, 0, 3<<28);
+ else
+ csr(igfx, p->fdi->rxctl.a, 0, 3<<8);
/* wait idle pattern time */
sleep(5);