[coreboot-gerrit] Patch set updated for coreboot: northbridge/gm45/raminit.c: enable GS45 high-performance mode

[Francis Rowe (info@gluglug.org.uk)]

Francis Rowe (info at gluglug.org.uk) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11135

-gerrit

commit 05a4160f6f062eae1309ac01af97d592672a5f8b
Author: Steve Shenton <sgsit at libreboot.org>
Date:   Fri Aug 7 08:22:27 2015 +0100

    northbridge/gm45/raminit.c: enable GS45 high-performance mode
    
    The datasheets for GS45 describe a high- and low-performance mode
    for different CPUs. Coreboot currently disables GS45 altogether,
    but forcing coreboot to treat high-performance GS45 as GM45 makes
    the X200S and X200 Tablet boot if it has the right CPU type.
    
    Hardcode-enable GS45 high-performance mode in coreboot, passing it
    off as GM45. This is known to work with all CPUs except the SU
    (low performance) models.
    
    The low-performance models are unsupported anyway, requiring
    extensive work on the raminit. For now, this patch increases
    compatibility to a whole new chipset (GS45), depending on the CPU.
    
    Change-Id: I2719385e93c37d254ce38e0f5f486262160234e1
    Signed-off-by: Steve Shenton <sgsit at libreboot.org>
    Signed-off-by: Francis Rowe <info at gluglug.org.uk>
---
 src/northbridge/intel/gm45/raminit.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/northbridge/intel/gm45/raminit.c b/src/northbridge/intel/gm45/raminit.c
index 9c4fecd..1614b7c 100644
--- a/src/northbridge/intel/gm45/raminit.c
+++ b/src/northbridge/intel/gm45/raminit.c
@@ -108,8 +108,7 @@ void get_gmch_info(sysinfo_t *sysinfo)
 			printk(BIOS_SPEW, "GMCH: GS40\n");
 			break;
 		case GMCH_GS45:
-			printk(BIOS_SPEW, "GMCH: GS45, using low power mode by default\n");
-			sysinfo->gs45_low_power_mode = 1;
+			printk(BIOS_SPEW, "GMCH: GS45, using high performance mode by default\n");
 			break;
 		case GMCH_PM45:
 			printk(BIOS_SPEW, "GMCH: PM45\n");
@@ -1692,7 +1691,7 @@ void raminit(sysinfo_t *const sysinfo, const int s3resume)
 {
 	const dimminfo_t *const dimms = sysinfo->dimms;
 	const timings_t *const timings = &sysinfo->selected_timings;
-	const int sff = sysinfo->gfx_type == GMCH_GS45;
+	const int sff = (sysinfo->gfx_type == GMCH_GS45) && (sysinfo->gs45_low_power_mode == 1);
 
 	int ch;
 	u8 reg8;