diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_display_power_well.h')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_power_well.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.h b/drivers/gpu/drm/i915/display/intel_display_power_well.h new file mode 100644 index 000000000000..9a3756fdcf7f --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_power_well.h @@ -0,0 +1,153 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2022 Intel Corporation + */ +#ifndef __INTEL_DISPLAY_POWER_WELL_H__ +#define __INTEL_DISPLAY_POWER_WELL_H__ + +#include <linux/types.h> + +#include "intel_display.h" + +struct drm_i915_private; +struct i915_power_well; + +/* + * i915_power_well_id: + * + * IDs used to look up power wells. Power wells accessed directly bypassing + * the power domains framework must be assigned a unique ID. The rest of power + * wells must be assigned DISP_PW_ID_NONE. + */ +enum i915_power_well_id { + DISP_PW_ID_NONE, + + VLV_DISP_PW_DISP2D, + BXT_DISP_PW_DPIO_CMN_A, + VLV_DISP_PW_DPIO_CMN_BC, + GLK_DISP_PW_DPIO_CMN_C, + CHV_DISP_PW_DPIO_CMN_D, + HSW_DISP_PW_GLOBAL, + SKL_DISP_PW_MISC_IO, + SKL_DISP_PW_1, + SKL_DISP_PW_2, + ICL_DISP_PW_3, + SKL_DISP_DC_OFF, + TGL_DISP_PW_TC_COLD_OFF, +}; + +struct i915_power_well_regs { + i915_reg_t bios; + i915_reg_t driver; + i915_reg_t kvmr; + i915_reg_t debug; +}; + +struct i915_power_well_ops { + const struct i915_power_well_regs *regs; + /* + * Synchronize the well's hw state to match the current sw state, for + * example enable/disable it based on the current refcount. Called + * during driver init and resume time, possibly after first calling + * the enable/disable handlers. + */ + void (*sync_hw)(struct drm_i915_private *i915, + struct i915_power_well *power_well); + /* + * Enable the well and resources that depend on it (for example + * interrupts located on the well). Called after the 0->1 refcount + * transition. + */ + void (*enable)(struct drm_i915_private *i915, + struct i915_power_well *power_well); + /* + * Disable the well and resources that depend on it. Called after + * the 1->0 refcount transition. + */ + void (*disable)(struct drm_i915_private *i915, + struct i915_power_well *power_well); + /* Returns the hw enabled state. */ + bool (*is_enabled)(struct drm_i915_private *i915, + struct i915_power_well *power_well); +}; + +struct i915_power_well_desc { + const char *name; + bool always_on; + u64 domains; + /* unique identifier for this power well */ + enum i915_power_well_id id; + /* + * Arbitraty data associated with this power well. Platform and power + * well specific. + */ + union { + struct { + /* + * request/status flag index in the PUNIT power well + * control/status registers. + */ + u8 idx; + } vlv; + struct { + enum dpio_phy phy; + } bxt; + struct { + /* + * request/status flag index in the power well + * constrol/status registers. + */ + u8 idx; + /* Mask of pipes whose IRQ logic is backed by the pw */ + u8 irq_pipe_mask; + /* + * Instead of waiting for the status bit to ack enables, + * just wait a specific amount of time and then consider + * the well enabled. + */ + u16 fixed_enable_delay; + /* The pw is backing the VGA functionality */ + bool has_vga:1; + bool has_fuses:1; + /* + * The pw is for an ICL+ TypeC PHY port in + * Thunderbolt mode. + */ + bool is_tc_tbt:1; + } hsw; + }; + const struct i915_power_well_ops *ops; +}; + +struct i915_power_well { + const struct i915_power_well_desc *desc; + /* power well enable/disable usage count */ + int count; + /* cached hw enabled state */ + bool hw_enabled; +}; + +struct i915_power_well *lookup_power_well(struct drm_i915_private *i915, + enum i915_power_well_id id); + +void intel_power_well_enable(struct drm_i915_private *i915, + struct i915_power_well *power_well); +void intel_power_well_disable(struct drm_i915_private *i915, + struct i915_power_well *power_well); +void intel_power_well_sync_hw(struct drm_i915_private *i915, + struct i915_power_well *power_well); +void intel_power_well_get(struct drm_i915_private *i915, + struct i915_power_well *power_well); +void intel_power_well_put(struct drm_i915_private *i915, + struct i915_power_well *power_well); +bool intel_power_well_is_enabled(struct drm_i915_private *i915, + struct i915_power_well *power_well); +bool intel_power_well_is_enabled_cached(struct i915_power_well *power_well); +bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, + enum i915_power_well_id power_well_id); +bool intel_power_well_is_always_on(struct i915_power_well *power_well); +const char *intel_power_well_name(struct i915_power_well *power_well); +u64 intel_power_well_domains(struct i915_power_well *power_well); +int intel_power_well_refcount(struct i915_power_well *power_well); + +#endif |