drivers/gpu/drm/i915/display/intel_cdclk.h

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2019 Intel Corporation
   4  */
   5
   6 #ifndef __INTEL_CDCLK_H__
   7 #define __INTEL_CDCLK_H__
   8
   9 #include <linux/types.h>
  10
  11 #include "i915_drv.h"
  12 #include "intel_display.h"
  13 #include "intel_global_state.h"
  14
  15 struct drm_i915_private;
  16 struct intel_atomic_state;
  17 struct intel_crtc_state;
  18
  19 struct intel_cdclk_vals {
  20         u32 cdclk;
  21         u16 refclk;
  22         u8 divider;     /* CD2X divider * 2 */
  23         u8 ratio;
  24 };
  25
  26 struct intel_cdclk_state {
  27         struct intel_global_state base;
  28
  29         /*
  30          * Logical configuration of cdclk (used for all scaling,
  31          * watermark, etc. calculations and checks). This is
  32          * computed as if all enabled crtcs were active.
  33          */
  34         struct intel_cdclk_config logical;
  35
  36         /*
  37          * Actual configuration of cdclk, can be different from the
  38          * logical configuration only when all crtc's are DPMS off.
  39          */
  40         struct intel_cdclk_config actual;
  41
  42         /* minimum acceptable cdclk for each pipe */
  43         int min_cdclk[I915_MAX_PIPES];
  44         /* minimum acceptable voltage level for each pipe */
  45         u8 min_voltage_level[I915_MAX_PIPES];
  46
  47         /* pipe to which cd2x update is synchronized */
  48         enum pipe pipe;
  49
  50         /* forced minimum cdclk for glk+ audio w/a */
  51         int force_min_cdclk;
  52
  53         /* bitmask of active pipes */
  54         u8 active_pipes;
  55 };
  56
  57 int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state);
  58 void intel_cdclk_init_hw(struct drm_i915_private *i915);
  59 void intel_cdclk_uninit_hw(struct drm_i915_private *i915);
  60 void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv);
  61 void intel_update_max_cdclk(struct drm_i915_private *dev_priv);
  62 void intel_update_cdclk(struct drm_i915_private *dev_priv);
  63 u32 intel_read_rawclk(struct drm_i915_private *dev_priv);
  64 bool intel_cdclk_needs_modeset(const struct intel_cdclk_config *a,
  65                                const struct intel_cdclk_config *b);
  66 void intel_set_cdclk_pre_plane_update(struct intel_atomic_state *state);
  67 void intel_set_cdclk_post_plane_update(struct intel_atomic_state *state);
  68 void intel_dump_cdclk_config(const struct intel_cdclk_config *cdclk_config,
  69                              const char *context);
  70 int intel_modeset_calc_cdclk(struct intel_atomic_state *state);
  71
  72 struct intel_cdclk_state *
  73 intel_atomic_get_cdclk_state(struct intel_atomic_state *state);
  74
  75 #define to_intel_cdclk_state(x) container_of((x), struct intel_cdclk_state, base)
  76 #define intel_atomic_get_old_cdclk_state(state) \
  77         to_intel_cdclk_state(intel_atomic_get_old_global_obj_state(state, &to_i915(state->base.dev)->cdclk.obj))
  78 #define intel_atomic_get_new_cdclk_state(state) \
  79         to_intel_cdclk_state(intel_atomic_get_new_global_obj_state(state, &to_i915(state->base.dev)->cdclk.obj))
  80
  81 int intel_cdclk_init(struct drm_i915_private *dev_priv);
  82
  83 #endif /* __INTEL_CDCLK_H__ */