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Diffstat (limited to 'src/soc/intel/broadwell/igd.c')
-rw-r--r--src/soc/intel/broadwell/igd.c183
1 files changed, 85 insertions, 98 deletions
diff --git a/src/soc/intel/broadwell/igd.c b/src/soc/intel/broadwell/igd.c
index c1cfdd81d7..6459f90115 100644
--- a/src/soc/intel/broadwell/igd.c
+++ b/src/soc/intel/broadwell/igd.c
@@ -33,11 +33,14 @@
#include <vboot/vbnv.h>
#include <soc/igd.h>
-#define GT_RETRY 1000
-#define GT_CDCLK_337 0
-#define GT_CDCLK_450 1
-#define GT_CDCLK_540 2
-#define GT_CDCLK_675 3
+#define GT_RETRY 1000
+enum {
+ GT_CDCLK_DEFAULT = 0,
+ GT_CDCLK_337,
+ GT_CDCLK_450,
+ GT_CDCLK_540,
+ GT_CDCLK_675,
+};
static u32 reg_em4;
static u32 reg_em5;
@@ -338,81 +341,49 @@ static void igd_setup_panel(struct device *dev)
}
}
-static void igd_cdclk_init_haswell(struct device *dev)
+static int igd_get_cdclk_haswell(u32 *const cdsel, int *const inform_pc,
+ struct device *const dev)
{
- config_t *conf = dev->chip_info;
+ const config_t *const conf = dev->chip_info;
int cdclk = conf->cdclk;
- int devid = pci_read_config16(dev, PCI_DEVICE_ID);
- int gpu_is_ulx = 0;
- u32 dpdiv, lpcll;
/* Check for ULX GT1 or GT2 */
- if (devid == 0x0a0e || devid == 0x0a1e)
- gpu_is_ulx = 1;
-
- /* 675MHz is not supported on haswell */
- if (cdclk == GT_CDCLK_675)
- cdclk = GT_CDCLK_337;
+ const int devid = pci_read_config16(dev, PCI_DEVICE_ID);
+ const int gpu_is_ulx = devid == IGD_HASWELL_ULX_GT1 ||
+ devid == IGD_HASWELL_ULX_GT2;
- /* If CD clock is fixed or ULT then set to 450MHz */
- if ((gtt_read(0x42014) & 0x1000000) || cpu_is_ult())
+ /* Check for fixed fused clock */
+ if (gtt_read(0x42014) & 1 << 24)
cdclk = GT_CDCLK_450;
- /* 540MHz is not supported on ULX */
- if (gpu_is_ulx && cdclk == GT_CDCLK_540)
+ /*
+ * ULX defaults to 337MHz with possible override for 450MHz
+ * ULT is fixed at 450MHz
+ * others default to 540MHz with possible override for 450MHz
+ */
+ if (gpu_is_ulx && cdclk <= GT_CDCLK_337)
cdclk = GT_CDCLK_337;
-
- /* 337.5MHz is not supported on non-ULT/ULX */
- if (!gpu_is_ulx && !cpu_is_ult() && cdclk == GT_CDCLK_337)
+ else if (gpu_is_ulx || cpu_is_ult() ||
+ cdclk == GT_CDCLK_337 || cdclk == GT_CDCLK_450)
cdclk = GT_CDCLK_450;
+ else
+ cdclk = GT_CDCLK_540;
- /* Set variables based on CD Clock setting */
- switch (cdclk) {
- case GT_CDCLK_337:
- dpdiv = 169;
- lpcll = (1 << 26);
- reg_em4 = 16;
- reg_em5 = 225;
- break;
- case GT_CDCLK_450:
- dpdiv = 225;
- lpcll = 0;
- reg_em4 = 4;
- reg_em5 = 75;
- break;
- case GT_CDCLK_540:
- dpdiv = 270;
- lpcll = (1 << 26);
- reg_em4 = 4;
- reg_em5 = 90;
- break;
- default:
- return;
- }
-
- /* Set LPCLL_CTL CD Clock Frequency Select */
- gtt_rmw(0x130040, 0xf3ffffff, lpcll);
-
- /* ULX: Inform power controller of selected frequency */
- if (gpu_is_ulx) {
- if (cdclk == GT_CDCLK_450)
- gtt_write(0x138128, 0x00000000); /* 450MHz */
- else
- gtt_write(0x138128, 0x00000001); /* 337.5MHz */
- gtt_write(0x13812c, 0x00000000);
- gtt_write(0x138124, 0x80000017);
- }
-
- /* Set CPU DP AUX 2X bit clock dividers */
- gtt_rmw(0x64010, 0xfffff800, dpdiv);
- gtt_rmw(0x64810, 0xfffff800, dpdiv);
+ *cdsel = cdclk != GT_CDCLK_450;
+ *inform_pc = gpu_is_ulx;
+ return cdclk;
}
-static void igd_cdclk_init_broadwell(struct device *dev)
+static int igd_get_cdclk_broadwell(u32 *const cdsel, int *const inform_pc,
+ struct device *const dev)
{
- config_t *conf = dev->chip_info;
+ static const u32 cdsel_by_cdclk[] = { 0, 2, 0, 1, 3 };
+ const config_t *const conf = dev->chip_info;
int cdclk = conf->cdclk;
- u32 dpdiv, lpcll, pwctl, cdset;
+
+ /* Check for ULX */
+ const int devid = pci_read_config16(dev, PCI_DEVICE_ID);
+ const int gpu_is_ulx = devid == IGD_BROADWELL_Y_GT2;
/* Inform power controller of upcoming frequency change */
gtt_write(0x138128, 0);
@@ -420,54 +391,69 @@ static void igd_cdclk_init_broadwell(struct device *dev)
gtt_write(0x138124, 0x80000018);
/* Poll GT driver mailbox for run/busy clear */
- if (!gtt_poll(0x138124, (1 << 31), (0 << 31)))
+ if (gtt_poll(0x138124, (1 << 31), (0 << 31))) {
+ *inform_pc = 1;
+ } else {
cdclk = GT_CDCLK_450;
+ *inform_pc = 0;
+ }
- if (gtt_read(0x42014) & 0x1000000) {
- /* If CD clock is fixed then set to 450MHz */
+ /* Check for fixed fused clock */
+ if (gtt_read(0x42014) & 1 << 24)
cdclk = GT_CDCLK_450;
- } else {
- /* Program CD clock to highest supported freq */
- if (cpu_is_ult())
- cdclk = GT_CDCLK_540;
- else
- cdclk = GT_CDCLK_675;
- }
- /* CD clock frequency 675MHz not supported on ULT */
- if (cpu_is_ult() && cdclk == GT_CDCLK_675)
+ /*
+ * ULX defaults to 450MHz with possible override up to 540MHz
+ * ULT defaults to 540MHz with possible override up to 675MHz
+ * others default to 675MHz with possible override for lower freqs
+ */
+ if (cdclk == GT_CDCLK_337)
+ cdclk = GT_CDCLK_337;
+ else if (cdclk == GT_CDCLK_450 ||
+ (gpu_is_ulx && cdclk == GT_CDCLK_DEFAULT))
+ cdclk = GT_CDCLK_450;
+ else if (cdclk == GT_CDCLK_540 || gpu_is_ulx ||
+ (cpu_is_ult() && cdclk == GT_CDCLK_DEFAULT))
cdclk = GT_CDCLK_540;
+ else
+ cdclk = GT_CDCLK_675;
+
+ *cdsel = cdsel_by_cdclk[cdclk];
+ return cdclk;
+}
+
+static void igd_cdclk_init(struct device *dev, const int is_broadwell)
+{
+ u32 dpdiv, cdsel, cdval;
+ int cdclk, inform_pc;
+
+ if (is_broadwell)
+ cdclk = igd_get_cdclk_broadwell(&cdsel, &inform_pc, dev);
+ else
+ cdclk = igd_get_cdclk_haswell(&cdsel, &inform_pc, dev);
/* Set variables based on CD Clock setting */
switch (cdclk) {
case GT_CDCLK_337:
- cdset = 337;
- lpcll = (1 << 27);
- pwctl = 2;
+ cdval = 337;
dpdiv = 169;
reg_em4 = 16;
reg_em5 = 225;
break;
case GT_CDCLK_450:
- cdset = 449;
- lpcll = 0;
- pwctl = 0;
+ cdval = 449;
dpdiv = 225;
reg_em4 = 4;
reg_em5 = 75;
break;
case GT_CDCLK_540:
- cdset = 539;
- lpcll = (1 << 26);
- pwctl = 1;
+ cdval = 539;
dpdiv = 270;
reg_em4 = 4;
reg_em5 = 90;
break;
case GT_CDCLK_675:
- cdset = 674;
- lpcll = (1 << 26) | (1 << 27);
- pwctl = 3;
+ cdval = 674;
dpdiv = 338;
reg_em4 = 8;
reg_em5 = 225;
@@ -476,15 +462,17 @@ static void igd_cdclk_init_broadwell(struct device *dev)
}
/* Set LPCLL_CTL CD Clock Frequency Select */
- gtt_rmw(0x130040, 0xf3ffffff, lpcll);
+ gtt_rmw(0x130040, 0xf3ffffff, cdsel << 26);
- /* Inform power controller of selected frequency */
- gtt_write(0x138128, pwctl);
- gtt_write(0x13812c, 0);
- gtt_write(0x138124, 0x80000017);
+ if (inform_pc) {
+ /* Inform power controller of selected frequency */
+ gtt_write(0x138128, cdsel);
+ gtt_write(0x13812c, 0);
+ gtt_write(0x138124, 0x80000017);
+ }
/* Program CD Clock Frequency */
- gtt_rmw(0x46200, 0xfffffc00, cdset);
+ gtt_rmw(0x46200, 0xfffffc00, cdval);
/* Set CPU DP AUX 2X bit clock dividers */
gtt_rmw(0x64010, 0xfffff800, dpdiv);
@@ -541,11 +529,10 @@ static void igd_init(struct device *dev)
pci_dev_init(dev);
/* Late init steps */
+ igd_cdclk_init(dev, is_broadwell);
if (is_broadwell) {
- igd_cdclk_init_broadwell(dev);
reg_script_run_on_dev(dev, broadwell_late_init_script);
} else {
- igd_cdclk_init_haswell(dev);
reg_script_run_on_dev(dev, haswell_late_init_script);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-11 10:04:00 +0000