diff options
Diffstat (limited to 'resources/libreboot/patch/0019-NOTFORMERGE-northbridge-gm45-raminit.c-enable-GS45-h.patch')
| -rw-r--r-- | resources/libreboot/patch/0019-NOTFORMERGE-northbridge-gm45-raminit.c-enable-GS45-h.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/resources/libreboot/patch/0019-NOTFORMERGE-northbridge-gm45-raminit.c-enable-GS45-h.patch b/resources/libreboot/patch/0019-NOTFORMERGE-northbridge-gm45-raminit.c-enable-GS45-h.patch new file mode 100644 index 0000000..8626071 --- /dev/null +++ b/resources/libreboot/patch/0019-NOTFORMERGE-northbridge-gm45-raminit.c-enable-GS45-h.patch @@ -0,0 +1,58 @@ +From 8747a02e76193b8764088ca25784a5e41969e357 Mon Sep 17 00:00:00 2001 +From: Francis Rowe <info@gluglug.org.uk> +Date: Fri, 12 Dec 2014 12:42:01 +0000 +Subject: [PATCH 19/22] NOTFORMERGE: northbridge/gm45/raminit.c: enable GS45 + high-perf + +X200S uses GS45 chipset, unlike X200 which uses GM45. These two +chipsets are mostly compatible except for raminit. + +The datasheets for GS45 describe a high- and low-performance mode +for different CPU's. Coreboot currently disables GS45 altogether, +but forcing coreboot to treat high-performance GS45 as GM45 makes +the X200S boot with certain RAM configurations. + +1x2GB fails: http://paste.debian.net/hidden/ae66cff7/ +2x2GB fails: http://paste.debian.net/hidden/8802e220/ +2x4GB boots: http://paste.debian.net/hidden/61114378/ + +Hardcode-enable GS45 high-performance mode in coreboot, passing it +off as GM45. This is known to work with all CPU's except the SU +(low performance) models. + +Patch courtesy of sgsit. + +Change-Id: I57032bb6e1ebdaf4e2aa09548e73d253afb9b078 +Signed-off-by: Francis Rowe <info@gluglug.org.uk> +Signed-off-by: Steve Shenton <sgsit@libreboot.org> +--- + src/northbridge/intel/gm45/raminit.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/src/northbridge/intel/gm45/raminit.c b/src/northbridge/intel/gm45/raminit.c +index 2c810de..a194c85 100644 +--- a/src/northbridge/intel/gm45/raminit.c ++++ b/src/northbridge/intel/gm45/raminit.c +@@ -109,8 +109,8 @@ 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"); ++ sysinfo->gs45_low_power_mode = 0; + break; + case GMCH_PM45: + printk(BIOS_SPEW, "GMCH: PM45\n"); +@@ -1693,7 +1693,7 @@ 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; +-- +1.9.1 + |