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drm/i915/hsw+: Add has_fuses power well attribute 

The pattern of a power well backing a set of fuses whose initialization
we need to wait for during power well enabling is common to all GEN9+
platforms. Adding support for this to the HSW power well enable helper
allows us to use the HSW/BDW power well code for GEN9+ as well in a
follow-up patch.

v2:
- Use an enum for power gates instead of raw numbers. (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170711204236.5618-6-imre.deak@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Imre Deak 2017-07-11 23:42:35 +03:00 committed by Daniel Vetter
parent 76347c04d8
commit b2891eb253
4 changed files with 48 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/i915/gvt/display.c
View File

@ -178,9 +178,9 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
SDE_PORTE_HOTPLUG_SPT);
vgpu_vreg(vgpu, SKL_FUSE_STATUS) |=
SKL_FUSE_DOWNLOAD_STATUS |
SKL_FUSE_PG0_DIST_STATUS |
SKL_FUSE_PG1_DIST_STATUS |
SKL_FUSE_PG2_DIST_STATUS;
SKL_FUSE_PG_DIST_STATUS(SKL_PG0) |
SKL_FUSE_PG_DIST_STATUS(SKL_PG1) |
SKL_FUSE_PG_DIST_STATUS(SKL_PG2);
vgpu_vreg(vgpu, LCPLL1_CTL) |=
LCPLL_PLL_ENABLE |
LCPLL_PLL_LOCK;

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1397,6 +1397,7 @@ struct i915_power_well {
u8 irq_pipe_mask;
/* The pw is backing the VGA functionality */
bool has_vga:1;
bool has_fuses:1;
} hsw;
};
const struct i915_power_well_ops *ops;

14
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8023,11 +8023,17 @@ enum {
#define HSW_PWR_WELL_CTL6 _MMIO(0x45414)
/* SKL Fuse Status */
enum skl_power_gate {
SKL_PG0,
SKL_PG1,
SKL_PG2,
};
#define SKL_FUSE_STATUS _MMIO(0x42000)
#define SKL_FUSE_DOWNLOAD_STATUS (1<<31)
#define SKL_FUSE_PG0_DIST_STATUS (1<<27)
#define SKL_FUSE_PG1_DIST_STATUS (1<<26)
#define SKL_FUSE_PG2_DIST_STATUS (1<<25)
#define SKL_FUSE_DOWNLOAD_STATUS (1<<31)
/* PG0 (HW control->no power well ID), PG1..PG2 (SKL_DISP_PW1..SKL_DISP_PW2) */
#define SKL_PW_TO_PG(pw) ((pw) - SKL_DISP_PW_1 + SKL_PG1)
#define SKL_FUSE_PG_DIST_STATUS(pg) (1 << (27 - (pg)))
/* Per-pipe DDI Function Control */
#define _TRANS_DDI_FUNC_CTL_A 0x60400

41
drivers/gpu/drm/i915/intel_runtime_pm.c
View File

@ -400,16 +400,43 @@ static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
!!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
}
static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
enum skl_power_gate pg)
{
/* Timeout 5us for PG#0, for other PGs 1us */
WARN_ON(intel_wait_for_register(dev_priv, SKL_FUSE_STATUS,
SKL_FUSE_PG_DIST_STATUS(pg),
SKL_FUSE_PG_DIST_STATUS(pg), 1));
}
static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
enum i915_power_well_id id = power_well->id;
bool wait_fuses = power_well->hsw.has_fuses;
enum skl_power_gate pg;
u32 val;
if (wait_fuses) {
pg = SKL_PW_TO_PG(id);
/*
* For PW1 we have to wait both for the PW0/PG0 fuse state
* before enabling the power well and PW1/PG1's own fuse
* state after the enabling. For all other power wells with
* fuses we only have to wait for that PW/PG's fuse state
* after the enabling.
*/
if (pg == SKL_PG1)
gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
}
val = I915_READ(HSW_PWR_WELL_DRIVER);
I915_WRITE(HSW_PWR_WELL_DRIVER, val | HSW_PWR_WELL_CTL_REQ(id));
hsw_wait_for_power_well_enable(dev_priv, power_well);
if (wait_fuses)
gen9_wait_for_power_well_fuses(dev_priv, pg);
hsw_power_well_post_enable(dev_priv, power_well->hsw.irq_pipe_mask,
power_well->hsw.has_vga);
}
@ -810,15 +837,15 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
case SKL_DISP_PW_1:
if (intel_wait_for_register(dev_priv,
SKL_FUSE_STATUS,
SKL_FUSE_PG0_DIST_STATUS,
SKL_FUSE_PG0_DIST_STATUS,
SKL_FUSE_PG_DIST_STATUS(SKL_PG0),
SKL_FUSE_PG_DIST_STATUS(SKL_PG0),
1)) {
DRM_ERROR("PG0 not enabled\n");
return;
}
break;
case SKL_DISP_PW_2:
if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) {
if (!(fuse_status & SKL_FUSE_PG_DIST_STATUS(SKL_PG1))) {
DRM_ERROR("PG1 in disabled state\n");
return;
}
@ -863,15 +890,15 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
if (power_well->id == SKL_DISP_PW_1) {
if (intel_wait_for_register(dev_priv,
SKL_FUSE_STATUS,
SKL_FUSE_PG1_DIST_STATUS,
SKL_FUSE_PG1_DIST_STATUS,
SKL_FUSE_PG_DIST_STATUS(SKL_PG1),
SKL_FUSE_PG_DIST_STATUS(SKL_PG1),
1))
DRM_ERROR("PG1 distributing status timeout\n");
} else if (power_well->id == SKL_DISP_PW_2) {
if (intel_wait_for_register(dev_priv,
SKL_FUSE_STATUS,
SKL_FUSE_PG2_DIST_STATUS,
SKL_FUSE_PG2_DIST_STATUS,
SKL_FUSE_PG_DIST_STATUS(SKL_PG2),
SKL_FUSE_PG_DIST_STATUS(SKL_PG2),
1))
DRM_ERROR("PG2 distributing status timeout\n");
}