[coreboot-gerrit] Patch set updated for coreboot: c960192 GOOGLE/SNOW: get graphics working
Ronald G. Minnich (rminnich@gmail.com)
gerrit at coreboot.org
Fri Apr 19 03:11:04 CEST 2013
Ronald G. Minnich (rminnich at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3116
-gerrit
commit c96019261665d2212a660b73132ef6ee1bb33475
Author: Ronald G. Minnich <rminnich at gmail.com>
Date: Thu Apr 18 18:09:24 2013 -0700
GOOGLE/SNOW: get graphics working
draft patch, needs cleanup, but we've got a blue screen of life.
Change-Id: I16e711c97e9d02c916824f621e2313297448732b
Signed-off-by: Ronald G. Minnich <rminnich at gmail.com>
---
src/cpu/samsung/exynos5-common/exynos-fb.c | 76 ++++++++++++++++++++++++-----
src/cpu/samsung/exynos5-common/s5p-dp-reg.c | 6 +++
src/cpu/samsung/exynos5250/cpu.c | 1 +
src/mainboard/google/snow/ramstage.c | 7 ++-
4 files changed, 76 insertions(+), 14 deletions(-)
diff --git a/src/cpu/samsung/exynos5-common/exynos-fb.c b/src/cpu/samsung/exynos5-common/exynos-fb.c
index 11d666b..1bb97a7 100644
--- a/src/cpu/samsung/exynos5-common/exynos-fb.c
+++ b/src/cpu/samsung/exynos5-common/exynos-fb.c
@@ -27,6 +27,7 @@
#include <arch/io.h>
#include <stdlib.h>
#include <string.h>
+#include <time.h>
#include <console/console.h>
#include <cpu/samsung/exynos5250/cpu.h>
#include <cpu/samsung/exynos5250/power.h>
@@ -41,6 +42,24 @@
#include "cpu/samsung/exynos5250/s5p-dp.h"
#include "s5p-dp-core.h"
+/* useful information. Here is the rough outline of how we bring up the display.
+ *1. Upon power-on Sink generates a hot plug detection pulse thru HPD
+ *2. Source determines video mode by reading DPCD receiver capability field (DPCD 00000h to
+ * 0000Dh) including eDP CP capability register (DPCD 0000Dh)
+ *3. Sink replies DPCD receiver capability field.
+ *4. Source starts EDID read thru I2C-over-AUX
+ *5. Sink replies EDID thru I2C-over-AUX
+ *6. Source determines link configuration, such as MAX_LINK_RATE and
+ * MAX_LANE_COUNT. Source also determines which type of eDP Authentication method
+ * to use and writes DPCD link configuration field (DPCD 00100h to 0010Ah) including eDP
+ * configuration set (DPCD 0010Ah).
+ *7. Source starts link training. Sink does clock recovery and equalization
+ *8. Source reads DPCD link status field (DPCD 00200h to 0020Bh)
+ *9. Sink replies DPCD link status field. If main link is not stable, Source repeats Step 7.
+ *10. Source sends MSA (Main Stream Attribute) data. Sink extracts video parameters and
+ * recovers stream clock.
+ *11. Source sends video data
+ */
/* To help debug any init errors here, define a list of possible errors */
enum {
ERR_PLL_NOT_UNLOCKED = 2,
@@ -83,7 +102,6 @@ int lcd_line_length;
int lcd_color_fg;
int lcd_color_bg;
-void *lcd_base; /* Start of framebuffer memory */
void *lcd_console_address; /* Start of console buffer */
short console_col;
@@ -127,38 +145,51 @@ void fb_init(vidinfo_t *panel_info, void *lcdbase,
{
unsigned int val;
u32 fbsize;
- struct exynos5_fimd *fimd =
+ struct exynos5_fimd *fimd = //14400000
samsung_get_base_fimd();
- struct exynos5_disp_ctrl *disp_ctrl =
+ struct exynos5_disp_ctrl *disp_ctrl = //14420000
samsung_get_base_disp_ctrl();
+ printk(BIOS_SPEW, "%s: fimd %p disp_ctrl %p\n", __func__, fimd, disp_ctrl);
+ printk(BIOS_SPEW, "pd %p\n", pd);
+ printk(BIOS_SPEW, "lcdbase %p\n", lcdbase);
+ printk(BIOS_SPEW, "pd->xres %d pd->yres %d\n", pd->xres, pd->yres);
+ printk(BIOS_SPEW, "Write %08x to %p\n", pd->ivclk | pd->fixvclk, &disp_ctrl->vidcon1);
writel(pd->ivclk | pd->fixvclk, &disp_ctrl->vidcon1);
val = ENVID_ON | ENVID_F_ON | (pd->clkval_f << CLKVAL_F_OFFSET);
+ printk(BIOS_SPEW, "Write %08x to fimd->vidcon0\n", val);
writel(val, &fimd->vidcon0);
val = (pd->vsync << VSYNC_PULSE_WIDTH_OFFSET) |
(pd->lower_margin << V_FRONT_PORCH_OFFSET) |
(pd->upper_margin << V_BACK_PORCH_OFFSET);
+ printk(BIOS_SPEW, "Write %08x to %p\n", val, &disp_ctrl->vidtcon0);
writel(val, &disp_ctrl->vidtcon0);
val = (pd->hsync << HSYNC_PULSE_WIDTH_OFFSET) |
(pd->right_margin << H_FRONT_PORCH_OFFSET) |
(pd->left_margin << H_BACK_PORCH_OFFSET);
+ printk(BIOS_SPEW, "Write %08x to %p\n", val, &disp_ctrl->vidtcon1);
writel(val, &disp_ctrl->vidtcon1);
val = ((pd->xres - 1) << HOZVAL_OFFSET) |
((pd->yres - 1) << LINEVAL_OFFSET);
+ printk(BIOS_SPEW, "Write %08x to %p\n", val, &disp_ctrl->vidtcon2);
writel(val, &disp_ctrl->vidtcon2);
- writel((unsigned int)lcd_base, &fimd->vidw00add0b0);
+ printk(BIOS_SPEW, "Write %08x to %p\n", (unsigned int)lcdbase, &fimd->vidw00add0b0);
+ writel((unsigned int)lcdbase, &fimd->vidw00add0b0);
fbsize = calc_fbsize(panel_info);
- writel((unsigned int)lcd_base + fbsize, &fimd->vidw00add1b0);
+ printk(BIOS_SPEW, "Write %08x to %p\n", (unsigned int)fbsize, &fimd->vidw00add1b0);
+ writel((unsigned int)lcdbase + fbsize, &fimd->vidw00add1b0);
+ printk(BIOS_SPEW, "Write %08x to %p\n", (unsigned int)pd->xres*2, &fimd->vidw00add0b0);
writel(pd->xres * 2, &fimd->vidw00add2);
val = ((pd->xres - 1) << OSD_RIGHTBOTX_F_OFFSET);
val |= ((pd->yres - 1) << OSD_RIGHTBOTY_F_OFFSET);
+ printk(BIOS_SPEW, "Write %08x to %p\n", val, &fimd->vidosd0b);
writel(val, &fimd->vidosd0b);
writel(pd->xres * pd->yres, &fimd->vidosd0c);
@@ -166,6 +197,7 @@ void fb_init(vidinfo_t *panel_info, void *lcdbase,
val = BPPMODE_F_RGB_16BIT_565 << BPPMODE_F_OFFSET;
val |= ENWIN_F_ENABLE | HALF_WORD_SWAP_EN;
+ printk(BIOS_SPEW, "Write %08x to %p\n", val, &fimd->wincon0);
writel(val, &fimd->wincon0);
/* DPCLKCON_ENABLE */
@@ -192,7 +224,7 @@ static int s5p_dp_config_video(struct s5p_dp_device *dp,
struct video_info *video_info)
{
int timeout = 0;
- u32 start;
+ u32 start, end;
struct exynos5_dp *base = dp->base;
s5p_dp_config_video_slave_mode(dp, video_info);
@@ -207,16 +239,17 @@ static int s5p_dp_config_video(struct s5p_dp_device *dp,
return -ERR_PLL_NOT_UNLOCKED;
}
- start = get_timer(0);
+ start = timer_us();
+ end = start + STREAM_ON_TIMEOUT*1000;
do {
if (s5p_dp_is_slave_video_stream_clock_on(dp) == 0) {
timeout++;
break;
}
- } while (get_timer(start) <= STREAM_ON_TIMEOUT);
+ } while (timer_us() < end);
if (!timeout) {
- printk(BIOS_DEBUG, "Video Clock Not ok\n");
+ printk(BIOS_DEBUG, "Video Clock Not ok after %d microseconds waiting\n", timer_us() - start);
return -ERR_VIDEO_CLOCK_BAD;
}
@@ -256,7 +289,7 @@ static int s5p_dp_enable_rx_to_enhanced_mode(struct s5p_dp_device *dp)
printk(BIOS_DEBUG, "DPCD read error\n");
return -ERR_DPCD_READ_ERROR1;
}
-
+ /* let's not do this and see if it gets better */
if (s5p_dp_write_byte_to_dpcd(dp, DPCD_ADDR_LANE_COUNT_SET,
DPCD_ENHANCED_FRAME_EN |
(data & DPCD_LANE_COUNT_SET_MASK))) {
@@ -409,23 +442,25 @@ static int s5p_dp_hw_link_training(struct s5p_dp_device *dp,
unsigned int max_lane,
unsigned int max_rate)
{
+ int pll_is_locked = 0;
u32 data;
u32 start;
int lane;
struct exynos5_dp *base = dp->base;
+ printk(BIOS_SPEW, "%s: start\n", __func__);
/* Stop Video */
clrbits_le32(&base->video_ctl_1, VIDEO_EN);
start = get_timer(0);
- while (s5p_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+ while ((pll_is_locked = s5p_dp_get_pll_lock_status(dp)) == PLL_UNLOCKED) {
if (get_timer(start) > PLL_LOCK_TIMEOUT) {
/* Ignore this error, and try to continue */
printk(BIOS_ERR, "PLL is not locked yet.\n");
break;
}
}
-
+ printk(BIOS_SPEW, "PLL is %slocked\n", pll_is_locked == PLL_LOCKED ? "": "un");
/* Reset Macro */
setbits_le32(&base->dp_phy_test, MACRO_RST);
@@ -449,6 +484,9 @@ static int s5p_dp_hw_link_training(struct s5p_dp_device *dp,
s5p_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate);
s5p_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count);
+ printk(BIOS_SPEW, "%s: rate 0x%x, lane_count %d\n", __func__,
+ dp->link_train.link_rate, dp->link_train.lane_count);
+
if ((dp->link_train.link_rate != LINK_RATE_1_62GBPS) &&
(dp->link_train.link_rate != LINK_RATE_2_70GBPS)) {
printk(BIOS_DEBUG, "Rx Max Link Rate is abnormal :%x !\n",
@@ -471,21 +509,27 @@ static int s5p_dp_hw_link_training(struct s5p_dp_device *dp,
dp->link_train.link_rate = max_rate;
/* Set link rate and count as you want to establish*/
+ printk(BIOS_SPEW, "Set link rate and count\n");
writel(dp->link_train.lane_count, &base->lane_count_set);
writel(dp->link_train.link_rate, &base->link_bw_set);
/* Set sink to D0 (Sink Not Ready) mode. */
+ printk(BIOS_SPEW, "Set sink rate to D0\n");
s5p_dp_write_byte_to_dpcd(dp, DPCD_ADDR_SINK_POWER_STATE,
DPCD_SET_POWER_STATE_D0);
/* Start HW link training */
+ printk(BIOS_SPEW, "Start Link hardware training\n");
writel(HW_TRAINING_EN, &base->dp_hw_link_training);
- /* Wait unitl HW link training done */
+ /* Wait until HW link training done */
+ printk(BIOS_SPEW, "Wait until HW link training done\n");
s5p_dp_wait_hw_link_training_done(dp);
+ printk(BIOS_SPEW, "HW link training done\n");
/* Get hardware link training status */
data = readl(&base->dp_hw_link_training);
+ printk(BIOS_SPEW, "hardware link training status: 0x%08x\n", data);
if (data != 0) {
printk(BIOS_DEBUG, " H/W link training failure: 0x%x\n", data);
return -ERR_LINK_TRAINING_FAILURE;
@@ -498,6 +542,8 @@ static int s5p_dp_hw_link_training(struct s5p_dp_device *dp,
data = readl(&base->lane_count_set);
dp->link_train.lane_count = data;
+ printk(BIOS_SPEW, "Done training: Link bandwidth: 0x%x, lane_count: %d\n",
+ dp->link_train.link_rate, data);
return 0;
}
@@ -534,12 +580,14 @@ int dp_controller_init(struct s5p_dp_device *dp_device)
/* Minimum delay after H/w Link training */
udelay(1000);
+ printk(BIOS_DEBUG, "call s5p_dp_enable_scramble\n");
ret = s5p_dp_enable_scramble(dp);
if (ret) {
printk(BIOS_DEBUG, "unable to set scramble mode\n");
return ret;
}
+ printk(BIOS_DEBUG, "call s5p_dp_enable_rx_to_enhanced_mode\n");
ret = s5p_dp_enable_rx_to_enhanced_mode(dp);
if (ret) {
printk(BIOS_DEBUG, "unable to set enhanced mode\n");
@@ -554,7 +602,9 @@ int dp_controller_init(struct s5p_dp_device *dp_device)
writel(dp->link_train.lane_count, &base->lane_count_set);
writel(dp->link_train.link_rate, &base->link_bw_set);
+ printk(BIOS_DEBUG, "call s5p_dp_init_video\n");
s5p_dp_init_video(dp);
+ printk(BIOS_DEBUG, "call s5p_dp_config_video\n");
ret = s5p_dp_config_video(dp, dp->video_info);
if (ret) {
printk(BIOS_DEBUG, "unable to config video\n");
diff --git a/src/cpu/samsung/exynos5-common/s5p-dp-reg.c b/src/cpu/samsung/exynos5-common/s5p-dp-reg.c
index 60e1398..49fe1cb 100644
--- a/src/cpu/samsung/exynos5-common/s5p-dp-reg.c
+++ b/src/cpu/samsung/exynos5-common/s5p-dp-reg.c
@@ -102,6 +102,7 @@ unsigned int s5p_dp_get_pll_lock_status(struct s5p_dp_device *dp)
u32 reg;
reg = readl(&dp->base->dp_debug_ctl);
+ printk(BIOS_SPEW, "%s: reg is 0x%x, PLL_LOCK is 0x%x\n", __func__, reg, PLL_LOCK);
if (reg & PLL_LOCK)
return PLL_LOCKED;
else
@@ -351,11 +352,13 @@ int s5p_dp_is_slave_video_stream_clock_on(struct s5p_dp_device *dp)
u32 reg;
struct exynos5_dp *base = dp->base;
+ printk(BIOS_SPEW, "%s: sys_ctl_1 is %p\n", __func__, &base->sys_ctl_1);
reg = readl(&base->sys_ctl_1);
writel(reg, &base->sys_ctl_1);
reg = readl(&base->sys_ctl_1);
+ printk(BIOS_SPEW, "%s: sys_ctl_1 is %08x, DET_STA is 0x%x\n", __func__, reg, DET_STA);
if (!(reg & DET_STA))
return -1;
@@ -364,6 +367,7 @@ int s5p_dp_is_slave_video_stream_clock_on(struct s5p_dp_device *dp)
reg = readl(&base->sys_ctl_2);
+ printk(BIOS_SPEW, "%s: sys_ctl_2 is %08x, CHA_STA is 0x%x\n", __func__, reg, CHA_STA);
if (reg & CHA_STA) {
printk(BIOS_DEBUG, "Input stream clk is changing\n");
return -1;
@@ -452,6 +456,7 @@ void s5p_dp_config_video_slave_mode(struct s5p_dp_device *dp,
u32 reg;
struct exynos5_dp *base = dp->base;
+ printk(BIOS_SPEW, "%s: Start\n", __func__);
reg = readl(&base->func_en_1);
reg &= ~(MASTER_VID_FUNC_EN_N|SLAVE_VID_FUNC_EN_N);
reg |= MASTER_VID_FUNC_EN_N;
@@ -474,6 +479,7 @@ void s5p_dp_config_video_slave_mode(struct s5p_dp_device *dp,
reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
writel(reg, &base->soc_general_ctl);
+ printk(BIOS_SPEW, "%s: Done\n", __func__);
}
void s5p_dp_wait_hw_link_training_done(struct s5p_dp_device *dp)
diff --git a/src/cpu/samsung/exynos5250/cpu.c b/src/cpu/samsung/exynos5250/cpu.c
index 09b670e..88cd90c 100644
--- a/src/cpu/samsung/exynos5250/cpu.c
+++ b/src/cpu/samsung/exynos5250/cpu.c
@@ -71,6 +71,7 @@ static void exynos_displayport_init(device_t dev)
mmio_resource(dev, 1, lcdbase/KiB, fb_size + (KiB-1)/KiB);
printk(BIOS_DEBUG,
"Initializing exynos VGA, base %p\n",(void *)lcdbase);
+ memset((void *)lcdbase, 0x55, 0x100000);
ret = lcd_ctrl_init(&vi, &panel, (void *)lcdbase);
}
diff --git a/src/mainboard/google/snow/ramstage.c b/src/mainboard/google/snow/ramstage.c
index 962c79b..ec98e9e 100644
--- a/src/mainboard/google/snow/ramstage.c
+++ b/src/mainboard/google/snow/ramstage.c
@@ -217,12 +217,17 @@ static void mainboard_init(device_t dev)
i2c_init(TPS69050_BUS, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
i2c_init(7, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+ clock_gate();
+
snow_lcd_vdd();
do {
udelay(50);
} while (!exynos_dp_hotplug());
exynos_dp_bridge_setup();
+ snow_backlight_vdd();
+ snow_backlight_pwm();
+ snow_backlight_en();
for (dp_tries = 1; dp_tries <= SNOW_MAX_DP_TRIES; dp_tries++) {
exynos_dp_bridge_init();
if (exynos_dp_hotplug()) {
@@ -231,7 +236,7 @@ static void mainboard_init(device_t dev)
}
if (dp_controller_init(&dp_device))
- continue;
+ break; // continue;
udelay(LCD_T3_DELAY_MS * 1000);
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