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-rw-r--r--src/drivers/intel/gma/i915_reg.h2
-rw-r--r--src/mainboard/apple/macbook21/devicetree.cb7
-rw-r--r--src/mainboard/lenovo/t60/devicetree.cb7
-rw-r--r--src/mainboard/lenovo/x60/devicetree.cb7
-rw-r--r--src/northbridge/intel/i945/chip.h11
-rw-r--r--src/northbridge/intel/i945/gma.c67
6 files changed, 91 insertions, 10 deletions
diff --git a/src/drivers/intel/gma/i915_reg.h b/src/drivers/intel/gma/i915_reg.h
index 2ee5748e75..dee6865224 100644
--- a/src/drivers/intel/gma/i915_reg.h
+++ b/src/drivers/intel/gma/i915_reg.h
@@ -62,7 +62,7 @@
#define GCFGC 0xf0 /* 915+ only */
#define GC_LOW_FREQUENCY_ENABLE (1 << 7)
#define GC_DISPLAY_CLOCK_190_200_MHZ (0 << 4)
-#define GC_DISPLAY_CLOCK_333_MHZ (4 << 4)
+#define GC_DISPLAY_CLOCK_333_320_MHZ (4 << 4)
#define GC_DISPLAY_CLOCK_MASK (7 << 4)
#define GM45_GC_RENDER_CLOCK_MASK (0xf << 0)
#define GM45_GC_RENDER_CLOCK_266_MHZ (8 << 0)
diff --git a/src/mainboard/apple/macbook21/devicetree.cb b/src/mainboard/apple/macbook21/devicetree.cb
index f37e768b76..b6e61eb9e1 100644
--- a/src/mainboard/apple/macbook21/devicetree.cb
+++ b/src/mainboard/apple/macbook21/devicetree.cb
@@ -22,7 +22,12 @@ chip northbridge/intel/i945
register "gpu_hotplug" = "0x00000220"
register "gpu_lvds_use_spread_spectrum_clock" = "1"
- register "gpu_backlight" = "0x1290128"
+ register "pwm_freq" = "180"
+ register "gpu_panel_power_up_delay" = "250"
+ register "gpu_panel_power_backlight_on_delay" = "2380"
+ register "gpu_panel_power_down_delay" = "250"
+ register "gpu_panel_power_backlight_off_delay" = "2380"
+ register "gpu_panel_power_cycle_delay" = "2"
device cpu_cluster 0 on
chip cpu/intel/socket_mFCPGA478
diff --git a/src/mainboard/lenovo/t60/devicetree.cb b/src/mainboard/lenovo/t60/devicetree.cb
index f66455bcce..6ad054cc8f 100644
--- a/src/mainboard/lenovo/t60/devicetree.cb
+++ b/src/mainboard/lenovo/t60/devicetree.cb
@@ -22,7 +22,12 @@ chip northbridge/intel/i945
register "gpu_hotplug" = "0x00000220"
register "gpu_lvds_use_spread_spectrum_clock" = "1"
- register "gpu_backlight" = "0x1280128"
+ register "pwm_freq" = "275"
+ register "gpu_panel_power_up_delay" = "250"
+ register "gpu_panel_power_backlight_on_delay" = "2380"
+ register "gpu_panel_power_down_delay" = "250"
+ register "gpu_panel_power_backlight_off_delay" = "2380"
+ register "gpu_panel_power_cycle_delay" = "2"
device cpu_cluster 0 on
chip cpu/intel/socket_mFCPGA478
diff --git a/src/mainboard/lenovo/x60/devicetree.cb b/src/mainboard/lenovo/x60/devicetree.cb
index aea6884165..28b63d3665 100644
--- a/src/mainboard/lenovo/x60/devicetree.cb
+++ b/src/mainboard/lenovo/x60/devicetree.cb
@@ -22,7 +22,12 @@ chip northbridge/intel/i945
register "gpu_hotplug" = "0x00000220"
register "gpu_lvds_use_spread_spectrum_clock" = "1"
- register "gpu_backlight" = "0x879F879E"
+ register "pwm_freq" = "180"
+ register "gpu_panel_power_up_delay" = "250"
+ register "gpu_panel_power_backlight_on_delay" = "2380"
+ register "gpu_panel_power_down_delay" = "250"
+ register "gpu_panel_power_backlight_off_delay" = "2380"
+ register "gpu_panel_power_cycle_delay" = "2"
device cpu_cluster 0 on
chip cpu/intel/socket_mFCPGA478
diff --git a/src/northbridge/intel/i945/chip.h b/src/northbridge/intel/i945/chip.h
index 8eaa5b4a40..3925a73ff2 100644
--- a/src/northbridge/intel/i945/chip.h
+++ b/src/northbridge/intel/i945/chip.h
@@ -4,8 +4,17 @@
#include <drivers/intel/gma/i915.h>
struct northbridge_intel_i945_config {
+ /* In units of 100us timer */
+ /* Timings as defined in VESA Notebook Panel Standard */
+ u16 gpu_panel_power_up_delay; /* T1+T2 time sequence */
+ u16 gpu_panel_power_down_delay; /* T3 time sequence */
+ u16 gpu_panel_power_backlight_on_delay; /* T5 time sequence */
+ u16 gpu_panel_power_backlight_off_delay; /* Tx time sequence */
+ /* In units of 0.1s */
+ u8 gpu_panel_power_cycle_delay;
+
u32 gpu_hotplug;
- u32 gpu_backlight;
+ u32 pwm_freq;
int gpu_lvds_use_spread_spectrum_clock;
struct i915_gpu_controller_info gfx;
int pci_mmio_size;
diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c
index eac8717cde..e3fe0973f7 100644
--- a/src/northbridge/intel/i945/gma.c
+++ b/src/northbridge/intel/i945/gma.c
@@ -47,6 +47,8 @@
#define BASE_FREQUENCY 100000
+#define DEFAULT_BLC_PWM 180
+
static int gtt_setup(u8 *mmiobase)
{
unsigned long PGETBL_save;
@@ -134,8 +136,6 @@ static int intel_gma_init_lvds(struct northbridge_intel_i945_config *conf,
write32(mmiobase + RENDER_RING_BASE + i, 0);
for (i = 0; i < 0x20; i += 4)
write32(mmiobase + FENCE_REG_965_0 + i, 0);
- write32(mmiobase + PP_ON_DELAYS, 0);
- write32(mmiobase + PP_OFF_DELAYS, 0);
/* Disable VGA. */
write32(mmiobase + VGACNTRL, VGA_DISP_DISABLE);
@@ -292,9 +292,6 @@ static int intel_gma_init_lvds(struct northbridge_intel_i945_config *conf,
write32(mmiobase + DSPSIZE(0), (hactive - 1) | ((vactive - 1) << 16));
write32(mmiobase + DSPPOS(0), 0);
- /* Backlight init. */
- write32(mmiobase + BLC_PWM_CTL, conf->gpu_backlight);
-
edid.bytes_per_line = (edid.bytes_per_line + 63) & ~63;
write32(mmiobase + DSPADDR(0), 0);
write32(mmiobase + DSPSURF(0), 0);
@@ -571,6 +568,62 @@ static int probe_edid(u8 *mmiobase, u8 slave)
return 1;
}
+static u32 get_cdclk(struct device *const dev)
+{
+ u16 gcfgc = pci_read_config16(dev, GCFGC);
+
+ if (gcfgc & GC_LOW_FREQUENCY_ENABLE) {
+ return 133333333;
+ } else {
+ switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+ case GC_DISPLAY_CLOCK_333_320_MHZ:
+ return 320000000;
+ default:
+ case GC_DISPLAY_CLOCK_190_200_MHZ:
+ return 200000000;
+ }
+ }
+}
+
+static u32 freq_to_blc_pwm_ctl(struct device *const dev, u16 pwm_freq)
+{
+ u32 blc_mod;
+
+ /* Set duty cycle to 100% due to use of legacy backlight control */
+ blc_mod = get_cdclk(dev) / (32 * pwm_freq);
+ return BLM_LEGACY_MODE | ((blc_mod / 2) << 17) | ((blc_mod / 2) << 1);
+}
+
+
+static void panel_setup(u8 *mmiobase, struct device *const dev)
+{
+ const struct northbridge_intel_i945_config *const conf = dev->chip_info;
+
+ u32 reg32;
+
+ /* Set up Panel Power On Delays */
+ reg32 = (conf->gpu_panel_power_up_delay & 0x1fff) << 16;
+ reg32 |= (conf->gpu_panel_power_backlight_on_delay & 0x1fff);
+ write32(mmiobase + PP_ON_DELAYS, reg32);
+
+ /* Set up Panel Power Off Delays */
+ reg32 = (conf->gpu_panel_power_down_delay & 0x1fff) << 16;
+ reg32 |= (conf->gpu_panel_power_backlight_off_delay & 0x1fff);
+ write32(mmiobase + PP_OFF_DELAYS, reg32);
+
+ /* Set up Panel Power Cycle Delay */
+ reg32 = (get_cdclk(dev) / 20000 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
+ reg32 |= conf->gpu_panel_power_cycle_delay & 0x1f;
+ write32(mmiobase + PP_DIVISOR, reg32);
+
+ /* Backlight init. */
+ if (conf->pwm_freq)
+ write32(mmiobase + BLC_PWM_CTL, freq_to_blc_pwm_ctl(dev,
+ conf->pwm_freq));
+ else
+ write32(mmiobase + BLC_PWM_CTL, freq_to_blc_pwm_ctl(dev,
+ DEFAULT_BLC_PWM));
+}
static void gma_func0_init(struct device *dev)
{
@@ -605,6 +658,10 @@ static void gma_func0_init(struct device *dev)
);
int err;
+
+ if (IS_ENABLED(CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GM))
+ panel_setup(mmiobase, dev);
+
/* probe if VGA is connected and always run */
/* VGA init if no LVDS is connected */
if (!probe_edid(mmiobase, 3) || probe_edid(mmiobase, 2))
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-11 05:47:35 +0000