LGTM.

Perhaps we can have shorter name for the helper and variable.

something like intel_dsc_get_vdsc_per_pipe, vdsc_instanances_per_pipe?

With that fixed, this is:

Reviewed-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>


On 8/3/2023 6:33 PM, Suraj Kandpal wrote:
We have a function that gets us the total of the vdsc engines being
used but not the no. of vdsc instances being used by each pipe.

--v6
-Change function to static

Signed-off-by: Suraj Kandpal <suraj.kand...@intel.com>
---
  drivers/gpu/drm/i915/display/intel_vdsc.c | 78 +++++++++++++----------
  1 file changed, 44 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c 
b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 4437ade8fa87..cd7b7b00be44 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -350,9 +350,14 @@ intel_dsc_power_domain(struct intel_crtc *crtc, enum 
transcoder cpu_transcoder)
                return POWER_DOMAIN_TRANSCODER_VDSC_PW2;
  }
+static int intel_dsc_get_no_vdsc_inst_per_pipe(const struct intel_crtc_state *crtc_state)
+{
+       return crtc_state->dsc.dsc_split ? 2 : 1;
+}
+
  int intel_dsc_get_num_vdsc_instances(const struct intel_crtc_state 
*crtc_state)
  {
-       int num_vdsc_instances = (crtc_state->dsc.dsc_split) ? 2 : 1;
+       int num_vdsc_instances = 
intel_dsc_get_no_vdsc_inst_per_pipe(crtc_state);
if (crtc_state->bigjoiner_pipes)
                num_vdsc_instances *= 2;
@@ -372,6 +377,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
        u32 rc_range_params_dword[8];
        int i = 0;
        int num_vdsc_instances = intel_dsc_get_num_vdsc_instances(crtc_state);
+       int no_vdsc_instances_per_pipe = 
intel_dsc_get_no_vdsc_inst_per_pipe(crtc_state);
/* Populate PICTURE_PARAMETER_SET_0 registers */
        pps_val = DSC_VER_MAJ | vdsc_cfg->dsc_version_minor <<
@@ -401,14 +407,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_0,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_0(pipe),
                                       pps_val);
@@ -425,14 +431,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_1,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_1(pipe),
                                       pps_val);
@@ -450,14 +456,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_2,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_2(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_2(pipe),
                                       pps_val);
@@ -475,14 +481,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_3,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_3(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_3(pipe),
                                       pps_val);
@@ -500,14 +506,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_4,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_4(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_4(pipe),
                                       pps_val);
@@ -525,14 +531,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_5,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_5(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_5(pipe),
                                       pps_val);
@@ -552,14 +558,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_6,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_6(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_6(pipe),
                                       pps_val);
@@ -577,14 +583,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_7,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_7(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_7(pipe),
                                       pps_val);
@@ -602,14 +608,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_8,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_8(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_8(pipe),
                                       pps_val);
@@ -627,14 +633,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_9,
                                       pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_9(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_9(pipe),
                                       pps_val);
@@ -654,14 +660,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       DSCC_PICTURE_PARAMETER_SET_10, pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_10(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_10(pipe),
                                       pps_val);
@@ -682,14 +688,14 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                 * If 2 VDSC instances are needed, configure PPS for second
                 * VDSC
                 */
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       DSCC_PICTURE_PARAMETER_SET_16, pps_val);
        } else {
                intel_de_write(dev_priv,
                               ICL_DSC0_PICTURE_PARAMETER_SET_16(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       ICL_DSC1_PICTURE_PARAMETER_SET_16(pipe),
                                       pps_val);
@@ -703,7 +709,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                intel_de_write(dev_priv,
                               MTL_DSC0_PICTURE_PARAMETER_SET_17(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       MTL_DSC1_PICTURE_PARAMETER_SET_17(pipe),
                                       pps_val);
@@ -716,7 +722,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                intel_de_write(dev_priv,
                               MTL_DSC0_PICTURE_PARAMETER_SET_18(pipe),
                               pps_val);
-               if (crtc_state->dsc.dsc_split)
+               if (no_vdsc_instances_per_pipe > 1)
                        intel_de_write(dev_priv,
                                       MTL_DSC1_PICTURE_PARAMETER_SET_18(pipe),
                                       pps_val);
@@ -740,7 +746,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                               rc_buf_thresh_dword[2]);
                intel_de_write(dev_priv, DSCA_RC_BUF_THRESH_1_UDW,
                               rc_buf_thresh_dword[3]);
-               if (crtc_state->dsc.dsc_split) {
+               if (no_vdsc_instances_per_pipe > 1) {
                        intel_de_write(dev_priv, DSCC_RC_BUF_THRESH_0,
                                       rc_buf_thresh_dword[0]);
                        intel_de_write(dev_priv, DSCC_RC_BUF_THRESH_0_UDW,
@@ -759,7 +765,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                               rc_buf_thresh_dword[2]);
                intel_de_write(dev_priv, ICL_DSC0_RC_BUF_THRESH_1_UDW(pipe),
                               rc_buf_thresh_dword[3]);
-               if (crtc_state->dsc.dsc_split) {
+               if (no_vdsc_instances_per_pipe > 1) {
                        intel_de_write(dev_priv,
                                       ICL_DSC1_RC_BUF_THRESH_0(pipe),
                                       rc_buf_thresh_dword[0]);
@@ -805,7 +811,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                               rc_range_params_dword[6]);
                intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_3_UDW,
                               rc_range_params_dword[7]);
-               if (crtc_state->dsc.dsc_split) {
+               if (no_vdsc_instances_per_pipe > 1) {
                        intel_de_write(dev_priv, DSCC_RC_RANGE_PARAMETERS_0,
                                       rc_range_params_dword[0]);
                        intel_de_write(dev_priv,
@@ -848,7 +854,7 @@ static void intel_dsc_pps_configure(const struct 
intel_crtc_state *crtc_state)
                intel_de_write(dev_priv,
                               ICL_DSC0_RC_RANGE_PARAMETERS_3_UDW(pipe),
                               rc_range_params_dword[7]);
-               if (crtc_state->dsc.dsc_split) {
+               if (no_vdsc_instances_per_pipe > 1) {
                        intel_de_write(dev_priv,
                                       ICL_DSC1_RC_RANGE_PARAMETERS_0(pipe),
                                       rc_range_params_dword[0]);
@@ -954,6 +960,7 @@ void intel_dsc_enable(const struct intel_crtc_state 
*crtc_state)
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        u32 dss_ctl1_val = 0;
        u32 dss_ctl2_val = 0;
+       int no_vdsc_instances_per_pipe = 
intel_dsc_get_no_vdsc_inst_per_pipe(crtc_state);
if (!crtc_state->dsc.compression_enable)
                return;
@@ -961,7 +968,7 @@ void intel_dsc_enable(const struct intel_crtc_state 
*crtc_state)
        intel_dsc_pps_configure(crtc_state);
dss_ctl2_val |= LEFT_BRANCH_VDSC_ENABLE;
-       if (crtc_state->dsc.dsc_split) {
+       if (no_vdsc_instances_per_pipe > 1) {
                dss_ctl2_val |= RIGHT_BRANCH_VDSC_ENABLE;
                dss_ctl1_val |= JOINER_ENABLE;
        }
@@ -997,6 +1004,7 @@ void intel_dsc_get_config(struct intel_crtc_state 
*crtc_state)
        enum intel_display_power_domain power_domain;
        intel_wakeref_t wakeref;
        u32 dss_ctl1, dss_ctl2, pps0 = 0, pps1 = 0, pps_temp0, pps_temp1;
+       int no_vdsc_instances_per_pipe;
if (!intel_dsc_source_support(crtc_state))
                return;
@@ -1019,10 +1027,12 @@ void intel_dsc_get_config(struct intel_crtc_state 
*crtc_state)
/* FIXME: add more state readout as needed */ + no_vdsc_instances_per_pipe = intel_dsc_get_no_vdsc_inst_per_pipe(crtc_state);
+
        /* PPS0 & PPS1 */
        if (!is_pipe_dsc(crtc, cpu_transcoder)) {
                pps1 = intel_de_read(dev_priv, DSCA_PICTURE_PARAMETER_SET_1);
-               if (crtc_state->dsc.dsc_split) {
+               if (no_vdsc_instances_per_pipe > 1) {
                        pps_temp1 = intel_de_read(dev_priv, 
DSCC_PICTURE_PARAMETER_SET_1);
                        drm_WARN_ON(&dev_priv->drm, pps1 != pps_temp1);
                }
@@ -1031,7 +1041,7 @@ void intel_dsc_get_config(struct intel_crtc_state 
*crtc_state)
                                     ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe));
                pps1 = intel_de_read(dev_priv,
                                     ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe));
-               if (crtc_state->dsc.dsc_split) {
+               if (no_vdsc_instances_per_pipe > 1) {
                        pps_temp0 = intel_de_read(dev_priv,
                                                  
ICL_DSC1_PICTURE_PARAMETER_SET_0(pipe));
                        pps_temp1 = intel_de_read(dev_priv,

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