Re: [Intel-gfx] [PATCH v2 15/15] drm/i915/dsb: Enable gamma lut programming using DSB.

[Animesh Manna]

On 8/22/2019 6:53 PM, Jani Nikula wrote:

On Wed, 21 Aug 2019, Animesh Manna <animesh.ma...@intel.com> wrote:

Gamma lut programming can be programmed using DSB
where bulk register programming can be done using indexed
register write which takes number of data and the mmio offset
to be written.

No. Please stick to adding and using the relevant intel dsb write
routines for switching areas to using DSB.

Thanks for review Jani, will reroll a new version soon.

Regards,
Animesh

BR,
Jani.

Cc: Jani Nikula <jani.nik...@intel.com>
Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
Signed-off-by: Animesh Manna <animesh.ma...@intel.com>
---
  drivers/gpu/drm/i915/display/intel_color.c |  4 ++++
  drivers/gpu/drm/i915/i915_reg.h            | 25 +++++++++++++++-------
  2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c 
b/drivers/gpu/drm/i915/display/intel_color.c
index 71a0201437a9..866e9306f4c9 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -882,6 +882,7 @@ static void icl_load_luts(const struct intel_crtc_state 
*crtc_state)
  {
        const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+       struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);

if (crtc_state->base.degamma_lut)

                glk_load_degamma_lut(crtc_state);
@@ -900,6 +901,8 @@ static void icl_load_luts(const struct intel_crtc_state 
*crtc_state)
                bdw_load_lut_10(crtc, gamma_lut, PAL_PREC_INDEX_VALUE(0));
                ivb_load_lut_ext_max(crtc);
        }
+
+       intel_dsb_commit(dev_priv->dsb);
  }

static u32 chv_cgm_degamma_ldw(const struct drm_color_lut *color)

@@ -980,6 +983,7 @@ void intel_color_load_luts(const struct intel_crtc_state 
*crtc_state)
  {
        struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);

+ dev_priv->dsb = crtc_state->dsb;

Cringe.

        dev_priv->display.load_luts(crtc_state);
  }

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h

index a1a9d09b6420..4d70ae6a6a2d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -242,7 +242,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
  #define _PORT(port, a, b)             _PICK_EVEN(port, a, b)
  #define _PLL(pll, a, b)                       _PICK_EVEN(pll, a, b)

-#define _MMIO_PIPE(pipe, a, b) _MMIO(_PIPE(pipe, a, b))

+#define _MMIO_PIPE(pipe, a, b, ...)    _MMIO(_PIPE(pipe, a, b), ##__VA_ARGS__)
  #define _MMIO_PLANE(plane, a, b)      _MMIO(_PLANE(plane, a, b))
  #define _MMIO_TRANS(tran, a, b)               _MMIO(_TRANS(tran, a, b))
  #define _MMIO_PORT(port, a, b)                _MMIO(_PORT(port, a, b))
@@ -10246,11 +10246,18 @@ enum skl_power_gate {
  #define _PAL_PREC_EXT2_GC_MAX_B       0x4AC30
  #define _PAL_PREC_EXT2_GC_MAX_C       0x4B430

-#define PREC_PAL_INDEX(pipe) _MMIO_PIPE(pipe, _PAL_PREC_INDEX_A, _PAL_PREC_INDEX_B)

-#define PREC_PAL_DATA(pipe)            _MMIO_PIPE(pipe, _PAL_PREC_DATA_A, 
_PAL_PREC_DATA_B)
-#define PREC_PAL_GC_MAX(pipe, i)       _MMIO(_PIPE(pipe, _PAL_PREC_GC_MAX_A, 
_PAL_PREC_GC_MAX_B) + (i) * 4)
-#define PREC_PAL_EXT_GC_MAX(pipe, i)   _MMIO(_PIPE(pipe, 
_PAL_PREC_EXT_GC_MAX_A, _PAL_PREC_EXT_GC_MAX_B) + (i) * 4)
-#define PREC_PAL_EXT2_GC_MAX(pipe, i)  _MMIO(_PIPE(pipe, 
_PAL_PREC_EXT2_GC_MAX_A, _PAL_PREC_EXT2_GC_MAX_B) + (i) * 4)
+#define PREC_PAL_INDEX(pipe)           _MMIO_PIPE(pipe, _PAL_PREC_INDEX_A, \
+                                                  _PAL_PREC_INDEX_B, \
+                                                  DSB_WRITE)
+#define PREC_PAL_DATA(pipe)            _MMIO_PIPE(pipe, _PAL_PREC_DATA_A, \
+                                                  _PAL_PREC_DATA_B, \
+                                                  DSB_INDEX_WRITE)
+#define PREC_PAL_GC_MAX(pipe, i)       _MMIO(_PIPE(pipe, _PAL_PREC_GC_MAX_A, 
_PAL_PREC_GC_MAX_B) + (i) * 4, \
+                                             DSB_WRITE)
+#define PREC_PAL_EXT_GC_MAX(pipe, i)   _MMIO(_PIPE(pipe, 
_PAL_PREC_EXT_GC_MAX_A, _PAL_PREC_EXT_GC_MAX_B) + (i) * 4, \
+                                             DSB_WRITE)
+#define PREC_PAL_EXT2_GC_MAX(pipe, i)  _MMIO(_PIPE(pipe, 
_PAL_PREC_EXT2_GC_MAX_A, _PAL_PREC_EXT2_GC_MAX_B) + (i) * 4, \
+                                             DSB_WRITE)

#define _PRE_CSC_GAMC_INDEX_A 0x4A484

  #define _PRE_CSC_GAMC_INDEX_B 0x4AC84
@@ -10274,10 +10281,12 @@ enum skl_power_gate {

#define PREC_PAL_MULTI_SEG_INDEX(pipe) _MMIO_PIPE(pipe, \

                                        _PAL_PREC_MULTI_SEG_INDEX_A, \
-                                       _PAL_PREC_MULTI_SEG_INDEX_B)
+                                       _PAL_PREC_MULTI_SEG_INDEX_B, \
+                                       DSB_WRITE)
  #define PREC_PAL_MULTI_SEG_DATA(pipe) _MMIO_PIPE(pipe, \
                                        _PAL_PREC_MULTI_SEG_DATA_A, \
-                                       _PAL_PREC_MULTI_SEG_DATA_B)
+                                       _PAL_PREC_MULTI_SEG_DATA_B, \
+                                       DSB_INDEX_WRITE)

/* pipe CSC & degamma/gamma LUTs on CHV */

  #define _CGM_PIPE_A_CSC_COEFF01       (VLV_DISPLAY_BASE + 0x67900)

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