[Intel-gfx] [PATCH v4 08/10] drm/i915/dsb: Enable gamma lut programming using DSB.
Animesh Manna
animesh.manna at intel.com
Wed Sep 4 10:30:32 UTC 2019
Hi,
On 8/30/2019 7:02 PM, Jani Nikula wrote:
> On Fri, 30 Aug 2019, Animesh Manna <animesh.manna at 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.
>>
>> v1: Initial version.
>> v2: Directly call dsb-api at callsites. (Jani)
>>
>> Cc: Jani Nikula <jani.nikula at intel.com>
>> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
>> Signed-off-by: Animesh Manna <animesh.manna at intel.com>
>> ---
>> drivers/gpu/drm/i915/display/intel_color.c | 64 ++++++++++++++--------
>> drivers/gpu/drm/i915/i915_drv.h | 2 +
>> 2 files changed, 43 insertions(+), 23 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
>> index 71a0201437a9..e4090d8e4547 100644
>> --- a/drivers/gpu/drm/i915/display/intel_color.c
>> +++ b/drivers/gpu/drm/i915/display/intel_color.c
>> @@ -589,34 +589,38 @@ static void bdw_load_lut_10(struct intel_crtc *crtc,
>> const struct drm_color_lut *lut = blob->data;
>> int i, lut_size = drm_color_lut_size(blob);
>> enum pipe pipe = crtc->pipe;
>> + struct intel_dsb *dsb = dev_priv->dsb;
> No. Don't put dsb in dev_priv. You have 12 DSB engines, 3 per pipe. You
> have intel_crtc for that.
>
> Was this not clear from my previous review?
>
> You have tons of functions here that will never have a DSB engine, it
> makes no sense to convert all of them to use the DSB.
>
>>
>> - I915_WRITE(PREC_PAL_INDEX(pipe), prec_index |
>> - PAL_PREC_AUTO_INCREMENT);
>> + intel_dsb_reg_write(dsb, PREC_PAL_INDEX(pipe),
>> + prec_index | PAL_PREC_AUTO_INCREMENT);
>>
>> for (i = 0; i < hw_lut_size; i++) {
>> /* We discard half the user entries in split gamma mode */
>> const struct drm_color_lut *entry =
>> &lut[i * (lut_size - 1) / (hw_lut_size - 1)];
>>
>> - I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_10(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_DATA(pipe),
>> + ilk_lut_10(entry));
>> }
>>
>> /*
>> * Reset the index, otherwise it prevents the legacy palette to be
>> * written properly.
>> */
>> - I915_WRITE(PREC_PAL_INDEX(pipe), 0);
>> + intel_dsb_reg_write(dsb, PREC_PAL_INDEX(pipe), 0);
>> }
>>
>> static void ivb_load_lut_ext_max(struct intel_crtc *crtc)
>> {
>> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> + struct intel_dsb *dsb = dev_priv->dsb;
>> enum pipe pipe = crtc->pipe;
>>
>> /* Program the max register to clamp values > 1.0. */
>> - I915_WRITE(PREC_PAL_EXT_GC_MAX(pipe, 0), 1 << 16);
>> - I915_WRITE(PREC_PAL_EXT_GC_MAX(pipe, 1), 1 << 16);
>> - I915_WRITE(PREC_PAL_EXT_GC_MAX(pipe, 2), 1 << 16);
>> + intel_dsb_reg_write(dsb, PREC_PAL_EXT_GC_MAX(pipe, 0), 1 << 16);
>> + intel_dsb_reg_write(dsb, PREC_PAL_EXT_GC_MAX(pipe, 1), 1 << 16);
>> + intel_dsb_reg_write(dsb, PREC_PAL_EXT_GC_MAX(pipe, 2), 1 << 16);
>> +
>>
>> /*
>> * Program the gc max 2 register to clamp values > 1.0.
>> @@ -624,9 +628,12 @@ static void ivb_load_lut_ext_max(struct intel_crtc *crtc)
>> * from 3.0 to 7.0
>> */
>> if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
>> - I915_WRITE(PREC_PAL_EXT2_GC_MAX(pipe, 0), 1 << 16);
>> - I915_WRITE(PREC_PAL_EXT2_GC_MAX(pipe, 1), 1 << 16);
>> - I915_WRITE(PREC_PAL_EXT2_GC_MAX(pipe, 2), 1 << 16);
>> + intel_dsb_reg_write(dsb, PREC_PAL_EXT2_GC_MAX(pipe, 0),
>> + 1 << 16);
>> + intel_dsb_reg_write(dsb, PREC_PAL_EXT2_GC_MAX(pipe, 1),
>> + 1 << 16);
>> + intel_dsb_reg_write(dsb, PREC_PAL_EXT2_GC_MAX(pipe, 2),
>> + 1 << 16);
>> }
>> }
>>
>> @@ -788,12 +795,13 @@ icl_load_gcmax(const struct intel_crtc_state *crtc_state,
>> {
>> struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
>> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> + struct intel_dsb *dsb = dev_priv->dsb;
>> enum pipe pipe = crtc->pipe;
>>
>> /* Fixme: LUT entries are 16 bit only, so we can prog 0xFFFF max */
>> - I915_WRITE(PREC_PAL_GC_MAX(pipe, 0), color->red);
>> - I915_WRITE(PREC_PAL_GC_MAX(pipe, 1), color->green);
>> - I915_WRITE(PREC_PAL_GC_MAX(pipe, 2), color->blue);
>> + intel_dsb_reg_write(dsb, PREC_PAL_GC_MAX(pipe, 0), color->red);
>> + intel_dsb_reg_write(dsb, PREC_PAL_GC_MAX(pipe, 1), color->green);
>> + intel_dsb_reg_write(dsb, PREC_PAL_GC_MAX(pipe, 2), color->blue);
>> }
>>
>> static void
>> @@ -803,6 +811,7 @@ icl_program_gamma_superfine_segment(const struct intel_crtc_state *crtc_state)
>> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> const struct drm_property_blob *blob = crtc_state->base.gamma_lut;
>> const struct drm_color_lut *lut = blob->data;
>> + struct intel_dsb *dsb = dev_priv->dsb;
>> enum pipe pipe = crtc->pipe;
>> u32 i;
>>
>> @@ -813,15 +822,16 @@ icl_program_gamma_superfine_segment(const struct intel_crtc_state *crtc_state)
>> * Superfine segment has 9 entries, corresponding to values
>> * 0, 1/(8 * 128 * 256), 2/(8 * 128 * 256) .... 8/(8 * 128 * 256).
>> */
>> - I915_WRITE(PREC_PAL_MULTI_SEG_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
>> + intel_dsb_reg_write(dsb, PREC_PAL_MULTI_SEG_INDEX(pipe),
>> + PAL_PREC_AUTO_INCREMENT);
>>
>> for (i = 0; i < 9; i++) {
>> const struct drm_color_lut *entry = &lut[i];
>>
>> - I915_WRITE(PREC_PAL_MULTI_SEG_DATA(pipe),
>> - ilk_lut_12p4_ldw(entry));
>> - I915_WRITE(PREC_PAL_MULTI_SEG_DATA(pipe),
>> - ilk_lut_12p4_udw(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_MULTI_SEG_DATA(pipe),
>> + ilk_lut_12p4_ldw(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_MULTI_SEG_DATA(pipe),
>> + ilk_lut_12p4_udw(entry));
>> }
>> }
>>
>> @@ -833,6 +843,7 @@ icl_program_gamma_multi_segment(const struct intel_crtc_state *crtc_state)
>> const struct drm_property_blob *blob = crtc_state->base.gamma_lut;
>> const struct drm_color_lut *lut = blob->data;
>> const struct drm_color_lut *entry;
>> + struct intel_dsb *dsb = dev_priv->dsb;
>> enum pipe pipe = crtc->pipe;
>> u32 i;
>>
>> @@ -847,11 +858,13 @@ icl_program_gamma_multi_segment(const struct intel_crtc_state *crtc_state)
>> * PAL_PREC_INDEX[0] and PAL_PREC_INDEX[1] map to seg2[1],
>> * with seg2[0] being unused by the hardware.
>> */
>> - I915_WRITE(PREC_PAL_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
>> + intel_dsb_reg_write(dsb, PREC_PAL_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
>> for (i = 1; i < 257; i++) {
>> entry = &lut[i * 8];
>> - I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_ldw(entry));
>> - I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_udw(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_DATA(pipe),
>> + ilk_lut_12p4_ldw(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_DATA(pipe),
>> + ilk_lut_12p4_udw(entry));
>> }
>>
>> /*
>> @@ -868,8 +881,10 @@ icl_program_gamma_multi_segment(const struct intel_crtc_state *crtc_state)
>> */
>> for (i = 0; i < 256; i++) {
>> entry = &lut[i * 8 * 128];
>> - I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_ldw(entry));
>> - I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_udw(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_DATA(pipe),
>> + ilk_lut_12p4_ldw(entry));
>> + intel_dsb_indexed_reg_write(dsb, PREC_PAL_DATA(pipe),
>> + ilk_lut_12p4_udw(entry));
>> }
>>
>> /* The last entry in the LUT is to be programmed in GCMAX */
>> @@ -980,7 +995,10 @@ 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 = intel_dsb_get(to_intel_crtc(crtc_state->base.crtc));
> No, don't do this. Don't store crtc specific info in a device global
> structure.
>
>> dev_priv->display.load_luts(crtc_state);
>> + intel_dsb_commit(dev_priv->dsb);
>> + intel_dsb_put(dev_priv->dsb);
> Please localize the use of DSB where needed. Move the gets and puts
> within the relevant platform specific ->load_luts hooks.
As per offline discussion, adding get/put call in load_luts hook will be
tricky as crtc-state is constant, As suggested by Shashank currently
trying to have a single element in crtc-state and will add dsb-get call
in atomic check if there is any change in color-property. Will add
dsb-commit & dsb-put in commit-tail. Further improvement will be done
based on need in future.
Regards,
Animesh
>
>> }
>>
>> void intel_color_commit(const struct intel_crtc_state *crtc_state)
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>> index 7aa11e3dd413..98f546c4ad49 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -1760,6 +1760,8 @@ struct drm_i915_private {
>> /* Mutex to protect the above hdcp component related values. */
>> struct mutex hdcp_comp_mutex;
>>
>> + struct intel_dsb *dsb;
>> +
>> /*
>> * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
>> * will be rejected. Instead look for a better place.
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