nb/gm45/gma.c: enable VESA framebuffer mode on VGA output

This implements "Keep VESA framebuffer" behavior on VGA output of gm45.
This patch reuses Linux code to compute vga divisors.

Change-Id: I2db5dd9bb1a7e309ca763b1559b89f7f5c8e6d3d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/16338
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Arthur Heymans 2016-08-27 01:09:19 +02:00 committed by Martin Roth
parent de6ad8369f
commit c51522f516
1 changed files with 209 additions and 42 deletions

View File

@ -25,6 +25,7 @@
#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"
@ -35,6 +36,8 @@
#include <pc80/vga.h>
#include <pc80/vga_io.h>
#define BASE_FREQUECY 96000
static struct resource *gtt_res = NULL;
u32 gtt_read(u32 reg)
@ -345,14 +348,38 @@ static void gma_init_lvds(const struct northbridge_intel_gm45_config *info,
}
static void gma_init_vga(const struct northbridge_intel_gm45_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;
u32 hactive, vactive, right_border, bottom_border;
int hpolarity, vpolarity;
u32 vsync, hsync, vblank, hblank, hfront_porch, vfront_porch;
u32 target_frequency;
u32 smallest_err = 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 < 0x2000; i++) {
outl((i << 2) | 1, piobase);
outl(physbase + (i << 12) + 1, piobase + 4);
}
write32(mmio + VGA0, 0x31108);
write32(mmio + VGA1, 0x31406);
@ -363,8 +390,7 @@ static void gma_init_vga(const struct northbridge_intel_gm45_config *info,
| ADPA_USE_VGA_HVPOLARITY
| ADPA_VSYNC_CNTL_ENABLE
| ADPA_HSYNC_CNTL_ENABLE
| ADPA_DPMS_ON
);
| ADPA_DPMS_ON);
write32(mmio + 0x7041c, 0x0);
write32(mmio + DPLL_MD(0), 0x3);
@ -382,95 +408,234 @@ static void gma_init_vga(const struct northbridge_intel_gm45_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;
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;
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 >= 17; 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_FREQUECY * m, candn + 2);
u32 dot = DIV_ROUND_CLOSEST(vco, p);
u32 this_err = ABS(dot - target_frequency);
if (this_err < smallest_err) {
smallest_err= this_err;
pixel_n = candn;
pixel_m1 = candm1;
pixel_m2 = candm2;
pixel_p1 = candp1;
}
}
}
}
}
if (smallest_err == 0xffffffff) {
printk(BIOS_ERR, "Error: 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_SPEW, "Borders %d x %d\n",
right_border, bottom_border);
printk(BIOS_SPEW, "Blank %d x %d\n",
hblank, vblank);
printk(BIOS_SPEW, "Sync %d x %d\n",
hsync, vsync);
printk(BIOS_SPEW, "Front porch %d x %d\n",
hfront_porch, vfront_porch);
printk(BIOS_SPEW, (info->gfx.use_spread_spectrum_clock
? "Spread spectrum clock\n" : "DREF clock\n"));
printk(BIOS_SPEW, "Polarities %d, %d\n",
hpolarity, vpolarity);
printk(BIOS_SPEW, "Data M1=%d, N1=%d\n",
data_m1, data_n1);
printk(BIOS_SPEW, "Link frequency %d kHz\n",
link_frequency);
printk(BIOS_SPEW, "Link M1=%d, N1=%d\n",
link_m1, link_n1);
printk(BIOS_SPEW, "Pixel N=%d, M1=%d, M2=%d, P1=%d\n",
pixel_n, pixel_m1, pixel_m2, pixel_p1);
printk(BIOS_SPEW, "Pixel clock %d kHz\n",
BASE_FREQUECY * (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,
edid.x_resolution * edid.y_resolution * 4);
set_vbe_mode_info_valid(&edid, lfb);
}
}
/* compare the header of the vga edid header */
@ -480,6 +645,7 @@ static u8 vga_connected(u8 *mmio)
u8 vga_edid[128];
u8 header[8] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};
intel_gmbus_read_edid(mmio + GMBUS0, 2, 0x50, vga_edid, 128);
intel_gmbus_stop(mmio + GMBUS0);
for (int i = 0; i < 8; i++) {
if (vga_edid[i] != header[i]) {
printk(BIOS_DEBUG, "VGA not connected. Using LVDS display\n");
@ -566,7 +732,8 @@ static void gma_func0_init(struct device *dev)
"Initializing VGA without OPROM. MMIO 0x%llx\n",
gtt_res->base);
if (vga_connected(res2mmio(gtt_res, 0, 0)))
gma_init_vga(conf, res2mmio(gtt_res, 0, 0));
gma_init_vga(conf, res2mmio(gtt_res, 0, 0),
physbase, pio_res->base, lfb_res->base);
else
gma_init_lvds(conf, res2mmio(gtt_res, 0, 0),
physbase, pio_res->base, lfb_res->base);