>-----Original Message-----
>From: Navare, Manasi D
>Sent: Tuesday, October 16, 2018 2:03 PM
>To: Srivatsa, Anusha <anusha.srivatsa@xxxxxxxxx>
>Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx; Jani Nikula
><jani.nikula@xxxxxxxxxxxxxxx>; Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
>Subject: Re: [PATCH v5 20/28] drm/i915/dp: Configure i915 Picture parameter Set
>registers during DSC enabling
>
>On Tue, Oct 16, 2018 at 12:58:24PM -0700, Srivatsa, Anusha wrote:
>>
>>
>> >-----Original Message-----
>> >From: Navare, Manasi D
>> >Sent: Friday, October 5, 2018 4:23 PM
>> >To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
>> >Cc: Navare, Manasi D <manasi.d.navare@xxxxxxxxx>; Jani Nikula
>> ><jani.nikula@xxxxxxxxxxxxxxx>; Ville Syrjala
>> ><ville.syrjala@xxxxxxxxxxxxxxx>; Srivatsa, Anusha
>> ><anusha.srivatsa@xxxxxxxxx>
>> >Subject: [PATCH v5 20/28] drm/i915/dp: Configure i915 Picture
>> >parameter Set registers during DSC enabling
>> >
>> >After encoder->pre_enable() hook, after link training sequence is
>> >completed, PPS registers for DSC encoder are configured using the DSC
>> >state parameters in intel_crtc_state as part of DSC enabling routine
>> >in the source. DSC enabling routine is called after
>> >encoder->pre_enable() before enbaling the pipe and after
>> >compression is enabled on the sink.
>> >
>> >v3:
>> >* Configure Pic_width/2 for each VDSC engine when two VDSC engines
>> >per pipe are used (Manasi)
>> >* Add DSC slice_row_per_frame in PPS16 (Manasi)
>> >
>> >v2:
>> >* Enable PG2 power well for VDSC on eDP
>> >
>> >Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
>> >Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
>> >Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
>> >Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Some comments inline.....
>>
>> >---
>> > drivers/gpu/drm/i915/i915_drv.h | 2 +
>> > drivers/gpu/drm/i915/intel_display.c | 6 +
>> > drivers/gpu/drm/i915/intel_vdsc.c | 418 +++++++++++++++++++++++++++
>> > 3 files changed, 426 insertions(+)
>> >
>> >diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> >b/drivers/gpu/drm/i915/i915_drv.h index 93e57b271d3b..b49985f5d08c
>> >100644
>> >--- a/drivers/gpu/drm/i915/i915_drv.h
>> >+++ b/drivers/gpu/drm/i915/i915_drv.h
>> >@@ -3506,6 +3506,8 @@ extern void intel_rps_mark_interactive(struct
>> >drm_i915_private *i915,
>> > bool interactive);
>> > extern bool intel_set_memory_cxsr(struct drm_i915_private *dev_priv,
>> > bool enable);
>> >+extern void intel_dsc_enable(struct intel_encoder *encoder,
>> >+ struct intel_crtc_state *crtc_state);
>> >
>> > int i915_reg_read_ioctl(struct drm_device *dev, void *data,
>> > struct drm_file *file);
>> >diff --git a/drivers/gpu/drm/i915/intel_display.c
>> >b/drivers/gpu/drm/i915/intel_display.c
>> >index 4ebf7c83085c..f7cb41775c57 100644
>> >--- a/drivers/gpu/drm/i915/intel_display.c
>> >+++ b/drivers/gpu/drm/i915/intel_display.c
>> >@@ -5480,6 +5480,12 @@ static void intel_encoders_pre_enable(struct
>> >drm_crtc *crtc,
>> >
>> > if (encoder->pre_enable)
>> > encoder->pre_enable(encoder, crtc_state, conn_state);
>> >+
>> >+ /*
>> >+ * Enable and Configure Display Stream Compression in the
>> >source
>> >+ * if enabled in intel_crtc_state.
>> >+ */
>> >+ intel_dsc_enable(encoder, crtc_state);
>> > }
>> > }
>> >
>> >diff --git a/drivers/gpu/drm/i915/intel_vdsc.c
>> >b/drivers/gpu/drm/i915/intel_vdsc.c
>> >index 594196a9d0f4..1f2b5dc82f16 100644
>> >--- a/drivers/gpu/drm/i915/intel_vdsc.c
>> >+++ b/drivers/gpu/drm/i915/intel_vdsc.c
>> >@@ -580,3 +580,421 @@ int intel_dp_compute_dsc_params(struct intel_dp
>> >*intel_dp,
>> >
>> > return 0;
>> > }
>> >+
>> >+static void intel_configure_pps_for_dsc_encoder(struct intel_encoder
>*encoder,
>> >+ 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(encoder->base.dev);
>> >+ struct drm_dsc_config *vdsc_cfg = &crtc_state->dp_dsc_cfg;
>> >+ enum pipe pipe = crtc->pipe;
>> >+ u32 pps_val = 0;
>> >+ u32 rc_buf_thresh_dword[4];
>> >+ u32 rc_range_params_dword[8];
>> >+ u8 num_vdsc_instances = (crtc_state->dsc_params.dsc_split) ? 2 : 1;
>> >+ int i = 0;
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_0 registers */
>> >+ pps_val = DSC_VER_MAJ | vdsc_cfg->dsc_version_minor <<
>> >+ DSC_VER_MIN_SHIFT |
>> >+ vdsc_cfg->bits_per_component << DSC_BPC_SHIFT |
>> >+ vdsc_cfg->line_buf_depth << DSC_LINE_BUF_DEPTH_SHIFT;
>> >+ if (vdsc_cfg->block_pred_enable)
>> >+ pps_val |= DSC_BLOCK_PREDICTION;
>> >+ else
>> >+ pps_val &= ~DSC_BLOCK_PREDICTION;
>> >+ if (vdsc_cfg->convert_rgb)
>> >+ pps_val |= DSC_COLOR_SPACE_CONVERSION;
>> >+ else
>> >+ pps_val &= ~DSC_COLOR_SPACE_CONVERSION;
>> >+ if (vdsc_cfg->enable422)
>> >+ pps_val |= DSC_422_ENABLE;
>> >+ else
>> >+ pps_val &= ~DSC_422_ENABLE;
>> >+ if (vdsc_cfg->vbr_enable)
>> >+ pps_val |= DSC_VBR_ENABLE;
>> >+ else
>> >+ pps_val &= ~DSC_VBR_ENABLE;
>> >+
>> >+ DRM_INFO("PPS0 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_0, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_0,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_0(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_1 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_BPP(vdsc_cfg->bits_per_pixel);
>> >+ DRM_INFO("PPS1 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_1, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_1,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_1(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_2 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_PIC_HEIGHT(vdsc_cfg->pic_height) |
>> >+ DSC_PIC_WIDTH(vdsc_cfg->pic_width / num_vdsc_instances);
>> >+ DRM_INFO("PPS2 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_2, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_2,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_2(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_2(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_3 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_SLICE_HEIGHT(vdsc_cfg->slice_height) |
>> >+ DSC_SLICE_WIDTH(vdsc_cfg->slice_width);
>> >+ DRM_INFO("PPS3 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_3, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_3,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_3(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_3(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_4 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_INITIAL_XMIT_DELAY(vdsc_cfg->initial_xmit_delay) |
>> >+ DSC_INITIAL_DEC_DELAY(vdsc_cfg->initial_dec_delay);
>> >+ DRM_INFO("PPS4 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_4, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_4,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_4(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_4(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_5 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_SCALE_INC_INT(vdsc_cfg->scale_increment_interval) |
>> >+ DSC_SCALE_DEC_INT(vdsc_cfg->scale_decrement_interval);
>> >+ DRM_INFO("PPS5 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_5, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_5,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_5(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_5(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_6 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_INITIAL_SCALE_VALUE(vdsc_cfg->initial_scale_value) |
>> >+ DSC_FIRST_LINE_BPG_OFFSET(vdsc_cfg->first_line_bpg_offset)
>> >|
>> >+ DSC_FLATNESS_MIN_QP(vdsc_cfg->flatness_min_qp) |
>> >+ DSC_FLATNESS_MAX_QP(vdsc_cfg->flatness_max_qp);
>> >+ DRM_INFO("PPS6 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_6, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_6,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_6(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_6(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_7 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_SLICE_BPG_OFFSET(vdsc_cfg->slice_bpg_offset) |
>> >+ DSC_NFL_BPG_OFFSET(vdsc_cfg->nfl_bpg_offset);
>> >+ DRM_INFO("PPS7 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_7, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_7,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_7(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_7(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_8 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_FINAL_OFFSET(vdsc_cfg->final_offset) |
>> >+ DSC_INITIAL_OFFSET(vdsc_cfg->initial_offset);
>> >+ DRM_INFO("PPS8 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_8, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_8,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_8(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_8(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_9 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_RC_MODEL_SIZE(DSC_RC_MODEL_SIZE_CONST) |
>> >+ DSC_RC_EDGE_FACTOR(DSC_RC_EDGE_FACTOR_CONST);
>> >+ DRM_INFO("PPS9 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_9, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_9,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_9(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_9(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate PICTURE_PARAMETER_SET_10 registers */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_RC_QUANT_INC_LIMIT0(vdsc_cfg-
>> >>rc_quant_incr_limit0) |
>> >+ DSC_RC_QUANT_INC_LIMIT1(vdsc_cfg->rc_quant_incr_limit1) |
>> >+ DSC_RC_TARGET_OFF_HIGH(DSC_RC_TGT_OFFSET_HI_CONST) |
>> >+ DSC_RC_TARGET_OFF_LOW(DSC_RC_TGT_OFFSET_LO_CONST);
>> >+ DRM_INFO("PPS10 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_10, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_10,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_10(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_10(pipe),
>> >+ pps_val);
>> >+ }
>> >+
>> >+ /* Populate the RC_BUF_THRESH registers */
>> >+ memset(rc_buf_thresh_dword, 0, sizeof(rc_buf_thresh_dword));
>> >+ for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
>> >+ rc_buf_thresh_dword[i/4] |= (u32)(vdsc_cfg->rc_buf_thresh[i] <<
>> >+ BITS_PER_BYTE * (i % 4));
>> >+ DRM_INFO(" RC_BUF_THRESH%d = 0x%08x\n", i,
>> >+ rc_buf_thresh_dword[i/4]);
>> >+ }
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_RC_BUF_THRESH_0,
>> >rc_buf_thresh_dword[0]);
>> >+ I915_WRITE(DSCA_RC_BUF_THRESH_0_UDW,
>> >rc_buf_thresh_dword[1]);
>> >+ I915_WRITE(DSCA_RC_BUF_THRESH_1,
>> >rc_buf_thresh_dword[2]);
>> >+ I915_WRITE(DSCA_RC_BUF_THRESH_1_UDW,
>> >rc_buf_thresh_dword[3]);
>> >+ if (crtc_state->dsc_params.dsc_split) {
>> >+ I915_WRITE(DSCC_RC_BUF_THRESH_0,
>> >+ rc_buf_thresh_dword[0]);
>> >+ I915_WRITE(DSCC_RC_BUF_THRESH_0_UDW,
>> >+ rc_buf_thresh_dword[1]);
>> >+ I915_WRITE(DSCC_RC_BUF_THRESH_1,
>> >+ rc_buf_thresh_dword[2]);
>> >+ I915_WRITE(DSCC_RC_BUF_THRESH_1_UDW,
>> >+ rc_buf_thresh_dword[3]);
>> >+ }
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_RC_BUF_THRESH_0(pipe),
>> >+ rc_buf_thresh_dword[0]);
>> >+ I915_WRITE(ICL_DSC0_RC_BUF_THRESH_0_UDW(pipe),
>> >+ rc_buf_thresh_dword[1]);
>> >+ I915_WRITE(ICL_DSC0_RC_BUF_THRESH_1(pipe),
>> >+ rc_buf_thresh_dword[2]);
>> >+ I915_WRITE(ICL_DSC0_RC_BUF_THRESH_1_UDW(pipe),
>> >+ rc_buf_thresh_dword[3]);
>> >+ if (crtc_state->dsc_params.dsc_split) {
>> >+ I915_WRITE(ICL_DSC1_RC_BUF_THRESH_0(pipe),
>> >+ rc_buf_thresh_dword[0]);
>> >+ I915_WRITE(ICL_DSC1_RC_BUF_THRESH_0_UDW(pipe),
>> >+ rc_buf_thresh_dword[1]);
>> >+ I915_WRITE(ICL_DSC1_RC_BUF_THRESH_1(pipe),
>> >+ rc_buf_thresh_dword[2]);
>> >+ I915_WRITE(ICL_DSC1_RC_BUF_THRESH_1_UDW(pipe),
>> >+ rc_buf_thresh_dword[3]);
>> >+ }
>> >+ }
>> >+
>> >+ /* Populate the RC_RANGE_PARAMETERS registers */
>> >+ memset(rc_range_params_dword, 0, sizeof(rc_range_params_dword));
>> >+ for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
>> >+ rc_range_params_dword[i/2] |= (u32)(((vdsc_cfg-
>> >>rc_range_params[i].range_bpg_offset <<
>> >+ RC_BPG_OFFSET_SHIFT) |
>> >+ (vdsc_cfg-
>> >>rc_range_params[i].range_max_qp <<
>> >+ RC_MAX_QP_SHIFT) |
>> >+ (vdsc_cfg-
>> >>rc_range_params[i].range_min_qp <<
>> >+ RC_MIN_QP_SHIFT)) << 16 *
>> >(i % 2));
>> >+ DRM_INFO(" RC_RANGE_PARAM_%d = 0x%08x\n", i,
>> >+ rc_range_params_dword[i/2]);
>> >+ }
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_0,
>> >+ rc_range_params_dword[0]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_0_UDW,
>> >+ rc_range_params_dword[1]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_1,
>> >+ rc_range_params_dword[2]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_1_UDW,
>> >+ rc_range_params_dword[3]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_2,
>> >+ rc_range_params_dword[4]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_2_UDW,
>> >+ rc_range_params_dword[5]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_3,
>> >+ rc_range_params_dword[6]);
>> >+ I915_WRITE(DSCA_RC_RANGE_PARAMETERS_3_UDW,
>> >+ rc_range_params_dword[7]);
>> >+ if (crtc_state->dsc_params.dsc_split) {
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_0,
>> >+ rc_range_params_dword[0]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_0_UDW,
>> >+ rc_range_params_dword[1]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_1,
>> >+ rc_range_params_dword[2]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_1_UDW,
>> >+ rc_range_params_dword[3]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_2,
>> >+ rc_range_params_dword[4]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_2_UDW,
>> >+ rc_range_params_dword[5]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_3,
>> >+ rc_range_params_dword[6]);
>> >+ I915_WRITE(DSCC_RC_RANGE_PARAMETERS_3_UDW,
>> >+ rc_range_params_dword[7]);
>> >+ }
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_0(pipe),
>> >+ rc_range_params_dword[0]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_0_UDW(pipe),
>> >+ rc_range_params_dword[1]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_1(pipe),
>> >+ rc_range_params_dword[2]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_1_UDW(pipe),
>> >+ rc_range_params_dword[3]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_2(pipe),
>> >+ rc_range_params_dword[4]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_2_UDW(pipe),
>> >+ rc_range_params_dword[5]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_3(pipe),
>> >+ rc_range_params_dword[6]);
>> >+ I915_WRITE(ICL_DSC0_RC_RANGE_PARAMETERS_3_UDW(pipe),
>> >+ rc_range_params_dword[7]);
>> >+ if (crtc_state->dsc_params.dsc_split) {
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_0(pipe),
>> >+ rc_range_params_dword[0]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_0_UDW(pipe),
>> >+ rc_range_params_dword[1]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_1(pipe),
>> >+ rc_range_params_dword[2]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_1_UDW(pipe),
>> >+ rc_range_params_dword[3]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_2(pipe),
>> >+ rc_range_params_dword[4]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_2_UDW(pipe),
>> >+ rc_range_params_dword[5]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_3(pipe),
>> >+ rc_range_params_dword[6]);
>> >+
>> > I915_WRITE(ICL_DSC1_RC_RANGE_PARAMETERS_3_UDW(pipe),
>> >+ rc_range_params_dword[7]);
>> >+ }
>> >+ }
>>
>> Any specific reason for PPS16 to be after RC_RANGE_PARAMETERS and
>RC_BUF_THRESH?
>>
>> Anusha
>
>Thats just how its ordered in the bspec.
Just thinking out loud, if in future, we need to use the rest of the PPS registers, then we have PPS0-10, RC_RANGE_PARAMETERS and RC_BUF_THRESH and again PPS registers....
Might be good to have all PPS registers together?
But that is just a thought, left to you if you want to change the order. Patch otherwise looks good.
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Anusha
>Manasi
>
>> >+ /* Populate Picture parameter set 16 */
>> >+ pps_val = 0;
>> >+ pps_val |= DSC_SLICE_CHUNK_SIZE(vdsc_cfg->slice_chunk_size) |
>> >+ DSC_SLICE_PER_LINE((vdsc_cfg->pic_width /
>> >num_vdsc_instances) /
>> >+ vdsc_cfg->slice_width) |
>> >+ DSC_SLICE_ROW_PER_FRAME(vdsc_cfg->pic_height /
>> >+ vdsc_cfg->slice_height);
>> >+ DRM_INFO("PPS16 = 0x%08x\n", pps_val);
>> >+ if (encoder->type == INTEL_OUTPUT_EDP) {
>> >+ I915_WRITE(DSCA_PICTURE_PARAMETER_SET_16, pps_val);
>> >+ /*
>> >+ * If 2 VDSC instances are needed, configure PPS for second
>> >+ * VDSC
>> >+ */
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+ I915_WRITE(DSCC_PICTURE_PARAMETER_SET_16,
>> >pps_val);
>> >+ } else {
>> >+ I915_WRITE(ICL_DSC0_PICTURE_PARAMETER_SET_16(pipe),
>> >pps_val);
>> >+ if (crtc_state->dsc_params.dsc_split)
>> >+
>> > I915_WRITE(ICL_DSC1_PICTURE_PARAMETER_SET_16(pipe),
>> >+ pps_val);
>> >+ }
>> >+}
>> >+
>> >+void intel_dsc_enable(struct intel_encoder *encoder,
>> >+ struct intel_crtc_state *crtc_state) {
>> >+
>> >+ if (!crtc_state->dsc_params.compression_enable)
>> >+ return;
>> >+
>> >+ intel_configure_pps_for_dsc_encoder(encoder, crtc_state);
>> >+
>> >+ return;
>> >+}
>> >--
>> >2.18.0
>>
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