ga-g41m-es2l: enable use of PCIe x16 port (patches from Damien Zammit)

2 files changed, 445 insertions, 0 deletions

diff --git a/resources/libreboot/patch/coreboot/55a54f662e2e793306dc7003afbcb82b49db0a8c/ga-g41m-es2l/0001-x4x-gma.c-Add-VESA-native-resolution-mode.patch b/resources/libreboot/patch/coreboot/55a54f662e2e793306dc7003afbcb82b49db0a8c/ga-g41m-es2l/0001-x4x-gma.c-Add-VESA-native-resolution-mode.patch
new file mode 100644
index 00000000..187dbc9a
--- /dev/null
+++ b/resources/libreboot/patch/coreboot/55a54f662e2e793306dc7003afbcb82b49db0a8c/ga-g41m-es2l/0001-x4x-gma.c-Add-VESA-native-resolution-mode.patch
@@ -0,0 +1,415 @@
+From 9659556d9edbba6c3530ed1d0630add30419210f Mon Sep 17 00:00:00 2001
+From: Arthur Heymans <arthur@aheymans.xyz>
+Date: Sun, 4 Sep 2016 16:01:11 +0200
+Subject: [PATCH 1/2] x4x/gma.c: Add VESA native resolution mode
+
+This patch implements native resolution, VESA mode, on the VGA output of
+x4x.
+
+It relies on EDID to modeset, but has a fallback-mode (640 x 480 @
+60Hz) if this is no EDID could be found. This fallback mode only works in textmode
+since in VESA mode some payloads (grub2) rely on VBE info, which is being
+generated from an EDID.
+
+Change-Id: I247ea7171ba3c5dc3b209d00e4dcb2d2069abd75
+Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
+---
+ src/northbridge/intel/x4x/gma.c | 282 ++++++++++++++++++++++++++++++++++------
+ 1 file changed, 242 insertions(+), 40 deletions(-)
+
+diff --git a/src/northbridge/intel/x4x/gma.c b/src/northbridge/intel/x4x/gma.c
+index 2679026..118f98d 100644
+--- a/src/northbridge/intel/x4x/gma.c
++++ b/src/northbridge/intel/x4x/gma.c
+@@ -26,24 +26,68 @@
+ #include <cpu/x86/msr.h>
+ #include <cpu/x86/mtrr.h>
+ #include <kconfig.h>
++#include <commonlib/helpers.h>
+ 
+ #include "drivers/intel/gma/i915_reg.h"
+ #include "chip.h"
+ #include "x4x.h"
+ #include <drivers/intel/gma/intel_bios.h>
++#include <drivers/intel/gma/edid.h>
+ #include <drivers/intel/gma/i915.h>
+ #include <pc80/vga.h>
+ #include <pc80/vga_io.h>
+ 
++#define BASE_FREQUENCY 96000
++
++static u8 edid_is_null(u8 *edid, u32 edid_size)
++{
++	u32 i;
++	for (i = 0; i < edid_size; i++) {
++		if (*(edid + i) != 0)
++			return 0;
++	}
++	return 1;
++}
+ static void intel_gma_init(const struct northbridge_intel_x4x_config *info,
+-			   u8 *mmio)
++			u8 *mmio, u32 physbase, u16 piobase, u32 lfb)
+ {
+ 
++
+ 	int i;
+-	u32 hactive, vactive;
++	u8 edid_data[128];
++	struct edid edid;
++	struct edid_mode *mode;
++	u8 edid_not_found;
++
++	/* Initialise mode variables for 640 x 480 @ 60Hz */
++	u32 hactive = 640, vactive = 480;
++	u32 right_border = 0, bottom_border = 0;
++	int hpolarity = 0, vpolarity = 0;
++	u32 hsync = 96, vsync = 2;
++	u32 hblank = 160, vblank = 45;
++	u32 hfront_porch = 16, vfront_porch = 10;
++	u32 target_frequency = 25175;
++
++	u32 err_most = 0xffffffff;
++	u32 pixel_p1 = 1;
++	u32 pixel_n = 1;
++	u32 pixel_m1 = 1;
++	u32 pixel_m2 = 1;
++	u32 link_frequency = info->gfx.link_frequency_270_mhz ? 270000 : 162000;
++	u32 data_m1;
++	u32 data_n1 = 0x00800000;
++	u32 link_m1;
++	u32 link_n1 = 0x00040000;
++
+ 
+ 	vga_gr_write(0x18, 0);
+ 
++	/* Set up GTT */
++	for (i = 0; i < 0x1000; i++) {
++		outl((i << 2) | 1, piobase);
++		outl(physbase + (i << 12) + 1, piobase + 4);
++	}
++
+ 	write32(mmio + VGA0, 0x31108);
+ 	write32(mmio + VGA1, 0x31406);
+ 
+@@ -73,107 +117,258 @@ static void intel_gma_init(const struct northbridge_intel_x4x_config *info,
+ 	for (i = 0; i <= 0x18; i++)
+ 		vga_cr_write(i, cr[i]);
+ 
++	udelay(1);
++
++	intel_gmbus_read_edid(mmio + GMBUS0, 2, 0x50, edid_data, 128);
++	intel_gmbus_stop(mmio + GMBUS0);
++	decode_edid(edid_data,
++		    sizeof(edid_data), &edid);
++	mode = &edid.mode;
++
++
+ 	/* Disable screen memory to prevent garbage from appearing.  */
+ 	vga_sr_write(1, vga_sr_read(1) | 0x20);
+ 
+-	hactive = 640;
+-	vactive = 400;
++	edid_not_found = edid_is_null(edid_data, sizeof(edid_data));
++	if (!edid_not_found) {
++		printk(BIOS_DEBUG, "EDID is not null");
++		hactive = edid.x_resolution;
++		vactive = edid.y_resolution;
++		right_border = mode->hborder;
++		bottom_border = mode->vborder;
++		hpolarity = (mode->phsync == '-');
++		vpolarity = (mode->pvsync == '-');
++		vsync = mode->vspw;
++		hsync = mode->hspw;
++		vblank = mode->vbl;
++		hblank = mode->hbl;
++		hfront_porch = mode->hso;
++		vfront_porch = mode->vso;
++		target_frequency = mode->pixel_clock;
++	} else
++		printk(BIOS_DEBUG, "EDID is null, using 640 x 480 @ 60Hz mode");
++
++	if (IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)) {
++		vga_sr_write(1, 1);
++		vga_sr_write(0x2, 0xf);
++		vga_sr_write(0x3, 0x0);
++		vga_sr_write(0x4, 0xe);
++		vga_gr_write(0, 0x0);
++		vga_gr_write(1, 0x0);
++		vga_gr_write(2, 0x0);
++		vga_gr_write(3, 0x0);
++		vga_gr_write(4, 0x0);
++		vga_gr_write(5, 0x0);
++		vga_gr_write(6, 0x5);
++		vga_gr_write(7, 0xf);
++		vga_gr_write(0x10, 0x1);
++		vga_gr_write(0x11, 0);
++
++		edid.bytes_per_line = (edid.bytes_per_line + 63) & ~63;
++
++		write32(mmio + DSPCNTR(0), DISPLAY_PLANE_ENABLE
++			| DISPPLANE_BGRX888);
++		write32(mmio + DSPADDR(0), 0);
++		write32(mmio + DSPSTRIDE(0), edid.bytes_per_line);
++		write32(mmio + DSPSURF(0), 0);
++		for (i = 0; i < 0x100; i++)
++			write32(mmio + LGC_PALETTE(0) + 4 * i, i * 0x010101);
++	} else {
++		vga_textmode_init();
++	}
++
++	u32 candn, candm1, candm2, candp1;
++	for (candn = 1; candn <= 4; candn++) {
++		for (candm1 = 23; candm1 >= 16; candm1--) {
++			for (candm2 = 11; candm2 >= 5; candm2--) {
++				for (candp1 = 8; candp1 >= 1; candp1--) {
++					u32 m = 5 * (candm1 + 2) + (candm2 + 2);
++					u32 p = candp1 * 10; /* 10 == p2 */
++					u32 vco = DIV_ROUND_CLOSEST(
++						BASE_FREQUENCY * m, candn + 2);
++					u32 dot = DIV_ROUND_CLOSEST(vco, p);
++					u32 this_err = ABS(dot - target_frequency);
++					if (this_err < err_most) {
++						err_most = this_err;
++						pixel_n = candn;
++						pixel_m1 = candm1;
++						pixel_m2 = candm2;
++						pixel_p1 = candp1;
++					}
++				}
++			}
++		}
++	}
++
++	if (err_most == 0xffffffff) {
++		printk(BIOS_ERR, "Couldn't find GFX clock divisors\n");
++		return;
++	}
++
++	link_m1 = ((uint64_t)link_n1 * mode->pixel_clock) / link_frequency;
++	data_m1 = ((uint64_t)data_n1 * 18 * mode->pixel_clock)
++		/ (link_frequency * 8 * 4);
++
++	printk(BIOS_INFO, "bringing up panel at resolution %d x %d\n",
++	       hactive, vactive);
++	printk(BIOS_DEBUG, "Borders %d x %d\n",
++	       right_border, bottom_border);
++	printk(BIOS_DEBUG, "Blank %d x %d\n",
++	       hblank, vblank);
++	printk(BIOS_DEBUG, "Sync %d x %d\n",
++	       hsync, vsync);
++	printk(BIOS_DEBUG, "Front porch %d x %d\n",
++	       hfront_porch, vfront_porch);
++	printk(BIOS_DEBUG, (info->gfx.use_spread_spectrum_clock
++			    ? "Spread spectrum clock\n" : "DREF clock\n"));
++	printk(BIOS_DEBUG, "Polarities %d, %d\n",
++	       hpolarity, vpolarity);
++	printk(BIOS_DEBUG, "Data M1=%d, N1=%d\n",
++	       data_m1, data_n1);
++	printk(BIOS_DEBUG, "Link frequency %d kHz\n",
++	       link_frequency);
++	printk(BIOS_DEBUG, "Link M1=%d, N1=%d\n",
++	       link_m1, link_n1);
++	printk(BIOS_DEBUG, "Pixel N=%d, M1=%d, M2=%d, P1=%d\n",
++	       pixel_n, pixel_m1, pixel_m2, pixel_p1);
++	printk(BIOS_DEBUG, "Pixel clock %d kHz\n",
++	       BASE_FREQUENCY * (5 * (pixel_m1 + 2) + (pixel_m2 + 2)) /
++		(pixel_n + 2) / (pixel_p1 * 10));
+ 
+ 	mdelay(1);
+-	write32(mmio + FP0(0), 0x31108);
+-	write32(mmio + DPLL(0),
+-		DPLL_VCO_ENABLE | DPLLB_MODE_DAC_SERIAL
+-		| DPLL_DAC_SERIAL_P2_CLOCK_DIV_10
+-		| 0x10601
+-		);
++	write32(mmio + FP0(0), (pixel_n << 16)
++		| (pixel_m1 << 8) | pixel_m2);
++	write32(mmio + DPLL(0), DPLL_VCO_ENABLE
++		| DPLL_VGA_MODE_DIS | DPLLB_MODE_DAC_SERIAL
++		| (0x10000 << (pixel_p1 - 1))
++		| (6 << 9));
++
+ 	mdelay(1);
+-	write32(mmio + DPLL(0),
+-		DPLL_VCO_ENABLE | DPLLB_MODE_DAC_SERIAL
+-		| DPLL_DAC_SERIAL_P2_CLOCK_DIV_10
+-		| 0x10601
+-		);
++	write32(mmio + DPLL(0), DPLL_VCO_ENABLE
++		| DPLL_VGA_MODE_DIS | DPLLB_MODE_DAC_SERIAL
++		| (0x10000 << (pixel_p1 - 1))
++		| (6 << 9));
+ 
+ 	write32(mmio + ADPA, ADPA_DAC_ENABLE
+ 			| ADPA_PIPE_A_SELECT
+ 			| ADPA_CRT_HOTPLUG_MONITOR_COLOR
+ 			| ADPA_CRT_HOTPLUG_ENABLE
+-			| ADPA_USE_VGA_HVPOLARITY
+ 			| ADPA_VSYNC_CNTL_ENABLE
+ 			| ADPA_HSYNC_CNTL_ENABLE
+ 			| ADPA_DPMS_ON
+-			);
++			| (vpolarity ? ADPA_VSYNC_ACTIVE_LOW :
++			   ADPA_VSYNC_ACTIVE_HIGH)
++			| (hpolarity ? ADPA_HSYNC_ACTIVE_LOW :
++			   ADPA_HSYNC_ACTIVE_HIGH));
+ 
+ 	write32(mmio + HTOTAL(0),
+-		((hactive - 1) << 16)
++		((hactive + right_border + hblank - 1) << 16)
+ 		| (hactive - 1));
+ 	write32(mmio + HBLANK(0),
+-		((hactive - 1) << 16)
+-		| (hactive - 1));
++		((hactive + right_border + hblank - 1) << 16)
++		| (hactive + right_border - 1));
+ 	write32(mmio + HSYNC(0),
+-		((hactive - 1) << 16)
+-		| (hactive - 1));
++		((hactive + right_border + hfront_porch + hsync - 1) << 16)
++		| (hactive + right_border + hfront_porch - 1));
+ 
+-	write32(mmio + VTOTAL(0), ((vactive - 1) << 16)
+-		| (vactive - 1));
+-	write32(mmio + VBLANK(0), ((vactive - 1) << 16)
++	write32(mmio + VTOTAL(0), ((vactive + bottom_border + vblank - 1) << 16)
+ 		| (vactive - 1));
++	write32(mmio + VBLANK(0), ((vactive + bottom_border + vblank - 1) << 16)
++		| (vactive + bottom_border - 1));
+ 	write32(mmio + VSYNC(0),
+-		((vactive - 1) << 16)
+-		| (vactive - 1));
++		((vactive + bottom_border + vfront_porch + vsync - 1) << 16)
++		| (vactive + bottom_border + vfront_porch - 1));
+ 
+ 	write32(mmio + PIPECONF(0), PIPECONF_DISABLE);
+ 
+ 	write32(mmio + PF_WIN_POS(0), 0);
+-
+-	write32(mmio + PIPESRC(0), (639 << 16) | 399);
+-	write32(mmio + PF_CTL(0),PF_ENABLE | PF_FILTER_MED_3x3);
+-	write32(mmio + PF_WIN_SZ(0), vactive | (hactive << 16));
+-	write32(mmio + PFIT_CONTROL, 0xa0000000);
++	if (IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)) {
++		write32(mmio + PIPESRC(0), ((hactive - 1) << 16)
++			| (vactive - 1));
++		write32(mmio + PF_CTL(0), 0);
++		write32(mmio + PF_WIN_SZ(0), 0);
++		write32(mmio + PFIT_CONTROL, 0);
++	} else {
++		write32(mmio + PIPESRC(0), (639 << 16) | 399);
++		write32(mmio + PF_CTL(0), PF_ENABLE | PF_FILTER_MED_3x3);
++		write32(mmio + PF_WIN_SZ(0), vactive | (hactive << 16));
++		write32(mmio + PFIT_CONTROL, 0x80000000);
++	}
+ 
+ 	mdelay(1);
+ 
++	write32(mmio + PIPE_DATA_M1(0), 0x7e000000 | data_m1);
++	write32(mmio + PIPE_DATA_N1(0), data_n1);
++	write32(mmio + PIPE_LINK_M1(0), link_m1);
++	write32(mmio + PIPE_LINK_N1(0), link_n1);
++
+ 	write32(mmio + 0x000f000c, 0x00002040);
+ 	mdelay(1);
+ 	write32(mmio + 0x000f000c, 0x00002050);
+ 	write32(mmio + 0x00060100, 0x00044000);
+ 	mdelay(1);
++	write32(mmio + PIPECONF(0), PIPECONF_BPP_6);
++	write32(mmio + 0x000f0008, 0x00000040);
++	write32(mmio + 0x000f000c, 0x00022050);
++	write32(mmio + PIPECONF(0), PIPECONF_BPP_6 | PIPECONF_DITHER_EN);
+ 	write32(mmio + PIPECONF(0), PIPECONF_ENABLE
+ 			| PIPECONF_BPP_6 | PIPECONF_DITHER_EN);
+ 
+-	write32(mmio + VGACNTRL, 0x0);
+-	write32(mmio + DSPCNTR(0), DISPLAY_PLANE_ENABLE | DISPPLANE_BGRX888);
+-	mdelay(1);
++	if (IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)) {
++		write32(mmio + VGACNTRL, VGA_DISP_DISABLE);
++		write32(mmio + DSPCNTR(0), DISPLAY_PLANE_ENABLE
++			| DISPPLANE_BGRX888);
++		mdelay(1);
++	} else {
++		write32(mmio + VGACNTRL, 0xc4008e);
++	}
+ 
+ 	write32(mmio + ADPA, ADPA_DAC_ENABLE
+ 			| ADPA_PIPE_A_SELECT
+ 			| ADPA_CRT_HOTPLUG_MONITOR_COLOR
+ 			| ADPA_CRT_HOTPLUG_ENABLE
+-			| ADPA_USE_VGA_HVPOLARITY
+ 			| ADPA_VSYNC_CNTL_ENABLE
+ 			| ADPA_HSYNC_CNTL_ENABLE
+ 			| ADPA_DPMS_ON
+-			);
++			| (vpolarity ? ADPA_VSYNC_ACTIVE_LOW :
++			   ADPA_VSYNC_ACTIVE_HIGH)
++			| (hpolarity ? ADPA_HSYNC_ACTIVE_LOW :
++			   ADPA_HSYNC_ACTIVE_HIGH));
+ 
+-	vga_textmode_init();
++	write32(mmio + PP_CONTROL, PANEL_POWER_ON | PANEL_POWER_RESET);
+ 
+-	/* Enable screen memory.  */
++	/* Enable screen memory. */
+ 	vga_sr_write(1, vga_sr_read(1) & ~0x20);
+ 
+ 	/* Clear interrupts. */
+ 	write32(mmio + DEIIR, 0xffffffff);
+ 	write32(mmio + SDEIIR, 0xffffffff);
++
++	if (IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)) {
++		memset((void *) lfb, 0,
++			hactive * vactive * 4);
++		set_vbe_mode_info_valid(&edid, lfb);
++	}
+ }
+ 
+ static void native_init(struct device *dev)
+ {
++	struct resource *lfb_res;
++	struct resource *pio_res;
++	u32 physbase;
+ 	struct resource *gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
+ 	struct northbridge_intel_x4x_config *conf = dev->chip_info;
+ 
++	lfb_res = find_resource(dev, PCI_BASE_ADDRESS_2);
++	pio_res = find_resource(dev, PCI_BASE_ADDRESS_4);
++	physbase = pci_read_config32(dev, 0x5c) & ~0xf;
++
+ 	if (gtt_res && gtt_res->base) {
+ 		printk(BIOS_SPEW,
+ 			"Initializing VGA without OPROM. MMIO 0x%llx\n",
+ 			gtt_res->base);
+-		intel_gma_init(conf, res2mmio(gtt_res, 0, 0));
++		intel_gma_init(conf, res2mmio(gtt_res, 0, 0),
++			physbase, pio_res->base, lfb_res->base);
+ 	}
+ 
+ 	/* Linux relies on VBT for panel info.  */
+@@ -182,6 +377,7 @@ static void native_init(struct device *dev)
+ 
+ static void gma_func0_init(struct device *dev)
+ {
++	u16 reg16;
+ 	u32 reg32;
+ 
+ 	/* IGD needs to be Bus Master */
+@@ -189,6 +385,12 @@ static void gma_func0_init(struct device *dev)
+ 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+ 	pci_write_config32(dev, PCI_COMMAND, reg32);
+ 
++	/* configure GMBUSFREQ */
++	reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0x2,0)), 0xcc);
++	reg16 &= ~0x1ff;
++	reg16 |= 0xbc;
++	pci_write_config16(dev_find_slot(0, PCI_DEVFN(0x2,0)), 0xcc, reg16);
++
+ 	if (IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT))
+ 		native_init(dev);
+ 	else
+-- 
+2.9.3
+
diff --git a/resources/libreboot/patch/coreboot/55a54f662e2e793306dc7003afbcb82b49db0a8c/ga-g41m-es2l/0002-gigabyte-ga-g41m-es2l-add-VESA-mode-to-Kconfig.patch b/resources/libreboot/patch/coreboot/55a54f662e2e793306dc7003afbcb82b49db0a8c/ga-g41m-es2l/0002-gigabyte-ga-g41m-es2l-add-VESA-mode-to-Kconfig.patch
new file mode 100644
index 00000000..d579df55
--- /dev/null
+++ b/resources/libreboot/patch/coreboot/55a54f662e2e793306dc7003afbcb82b49db0a8c/ga-g41m-es2l/0002-gigabyte-ga-g41m-es2l-add-VESA-mode-to-Kconfig.patch
@@ -0,0 +1,30 @@
+From f9a84edfc672424c9dcaa0a71ad0751c2355c3d0 Mon Sep 17 00:00:00 2001
+From: Arthur Heymans <arthur@aheymans.xyz>
+Date: Mon, 5 Sep 2016 12:07:57 +0200
+Subject: [PATCH 2/2] gigabyte/ga-g41m-es2l: add VESA mode to Kconfig
+
+This patch adds MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG to the
+gigabyte/ga-g41m-es2l Kconfig to allow selecting between textmode and
+vesamode in menuconfig.
+
+Change-Id: I84b61118fa0419d49d2498b66029711cdce97576
+Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
+---
+ src/mainboard/gigabyte/ga-g41m-es2l/Kconfig | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig b/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig
+index 6452f4d..281d498 100644
+--- a/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig
++++ b/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig
+@@ -26,6 +26,7 @@ config BOARD_SPECIFIC_OPTIONS
+ 	select BOARD_ROMSIZE_KB_1024
+ 	select INTEL_EDID
+ 	select MAINBOARD_HAS_NATIVE_VGA_INIT
++	select MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG
+ 	select PCIEXP_ASPM
+ 	select PCIEXP_CLK_PM
+ 	select PCIEXP_L1_SUB_STATE
+-- 
+2.9.3
+