drm/amd/display: Speed up DML fast_validate path

[Why]
Iterating over every voltage state when we need to validate thousands of
configurations all at once (i.e. display hotplug) can take a significant
amount of time.

[How]
Check just the highest voltage state when fast_validate is true to
verify whether the configuration can work at all, then do a proper
validation including all voltage states later when fast_validate is false.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index f94abd1..a42ddb9 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -1551,6 +1551,7 @@ bool dcn32_internal_validate_bw(struct dc *dc,
                context->bw_ctx.dml.soc.allow_for_pstate_or_stutter_in_vblank_final =
                        dm_prefetch_support_fclk_and_stutter;
 
+               context->bw_ctx.dml.validate_max_state = fast_validate;
                vlevel = dml_get_voltage_level(&context->bw_ctx.dml, pipes, pipe_cnt);
 
                /* Last attempt with Prefetch mode 2 (dm_prefetch_support_stutter == 3) */
@@ -1559,6 +1560,7 @@ bool dcn32_internal_validate_bw(struct dc *dc,
                                dm_prefetch_support_stutter;
                        vlevel = dml_get_voltage_level(&context->bw_ctx.dml, pipes, pipe_cnt);
                }
+               context->bw_ctx.dml.validate_max_state = false;
 
                if (vlevel < context->bw_ctx.dml.soc.num_states) {
                        memset(split, 0, sizeof(split));

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
index 4b8f5fa..bc22078 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
@@ -1707,7 +1707,7 @@ static void mode_support_configuration(struct vba_vars_st *v,
 void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
 {
        struct vba_vars_st *v = &mode_lib->vba;
-       int i, j;
+       int i, j, start_state;
        unsigned int k, m;
        unsigned int MaximumMPCCombine;
        unsigned int NumberOfNonCombinedSurfaceOfMaximumBandwidth;
@@ -1720,7 +1720,10 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 #endif
 
        /*MODE SUPPORT, VOLTAGE STATE AND SOC CONFIGURATION*/
-
+       if (mode_lib->validate_max_state)
+               start_state = v->soc.num_states - 1;
+       else
+               start_state = 0;
        /*Scale Ratio, taps Support Check*/
 
        mode_lib->vba.ScaleRatioAndTapsSupport = true;
@@ -2009,7 +2012,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
        mode_lib->vba.MPCCombineMethodIncompatible = v->dummy_vars.dml32_ModeSupportAndSystemConfigurationFull.MPCCombineMethodAsNeededForPStateChangeAndVoltage
                        && v->dummy_vars.dml32_ModeSupportAndSystemConfigurationFull.MPCCombineMethodAsPossible;
 
-       for (i = 0; i < v->soc.num_states; i++) {
+       for (i = start_state; i < v->soc.num_states; i++) {
                for (j = 0; j < 2; j++) {
                        mode_lib->vba.TotalNumberOfActiveDPP[i][j] = 0;
                        mode_lib->vba.TotalAvailablePipesSupport[i][j] = true;
@@ -2286,7 +2289,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                }
        }
 
-       for (i = 0; i < v->soc.num_states; ++i) {
+       for (i = start_state; i < v->soc.num_states; ++i) {
                mode_lib->vba.ExceededMultistreamSlots[i] = false;
                for (k = 0; k < mode_lib->vba.NumberOfActiveSurfaces; ++k) {
                        if (mode_lib->vba.OutputMultistreamEn[k] == true && mode_lib->vba.OutputMultistreamId[k] == k) {
@@ -2386,7 +2389,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                }
        }
 
-       for (i = 0; i < v->soc.num_states; ++i) {
+       for (i = start_state; i < v->soc.num_states; ++i) {
                mode_lib->vba.DTBCLKRequiredMoreThanSupported[i] = false;
                for (k = 0; k < mode_lib->vba.NumberOfActiveSurfaces; ++k) {
                        if (mode_lib->vba.BlendingAndTiming[k] == k
@@ -2403,7 +2406,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                }
        }
 
-       for (i = 0; i < v->soc.num_states; ++i) {
+       for (i = start_state; i < v->soc.num_states; ++i) {
                mode_lib->vba.ODMCombine2To1SupportCheckOK[i] = true;
                mode_lib->vba.ODMCombine4To1SupportCheckOK[i] = true;
                for (k = 0; k < mode_lib->vba.NumberOfActiveSurfaces; ++k) {
@@ -2421,7 +2424,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                }
        }
 
-       for (i = 0; i < v->soc.num_states; i++) {
+       for (i = start_state; i < v->soc.num_states; i++) {
                mode_lib->vba.DSCCLKRequiredMoreThanSupported[i] = false;
                for (k = 0; k <= mode_lib->vba.NumberOfActiveSurfaces - 1; k++) {
                        if (mode_lib->vba.BlendingAndTiming[k] == k) {
@@ -2458,7 +2461,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
        /* Check DSC Unit and Slices Support */
        v->dummy_vars.dml32_ModeSupportAndSystemConfigurationFull.TotalDSCUnitsRequired = 0;
 
-       for (i = 0; i < v->soc.num_states; ++i) {
+       for (i = start_state; i < v->soc.num_states; ++i) {
                mode_lib->vba.NotEnoughDSCUnits[i] = false;
                mode_lib->vba.NotEnoughDSCSlices[i] = false;
                v->dummy_vars.dml32_ModeSupportAndSystemConfigurationFull.TotalDSCUnitsRequired = 0;
@@ -2493,7 +2496,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
        }
 
        /*DSC Delay per state*/
-       for (i = 0; i < v->soc.num_states; ++i) {
+       for (i = start_state; i < v->soc.num_states; ++i) {
                for (k = 0; k < mode_lib->vba.NumberOfActiveSurfaces; ++k) {
                        mode_lib->vba.DSCDelayPerState[i][k] = dml32_DSCDelayRequirement(
                                        mode_lib->vba.RequiresDSC[i][k], mode_lib->vba.ODMCombineEnablePerState[i][k],
@@ -2520,7 +2523,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 
        //Calculate Swath, DET Configuration, DCFCLKDeepSleep
        //
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j) {
                        for (k = 0; k < mode_lib->vba.NumberOfActiveSurfaces; ++k) {
                                mode_lib->vba.RequiredDPPCLKThisState[k] = mode_lib->vba.RequiredDPPCLK[i][j][k];
@@ -2655,7 +2658,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                        mode_lib->vba.SurfaceSizeInMALL,
                        &mode_lib->vba.ExceededMALLSize);
 
-       for (i = 0; i < v->soc.num_states; i++) {
+       for (i = start_state; i < v->soc.num_states; i++) {
                for (j = 0; j < 2; j++) {
                        for (k = 0; k <= mode_lib->vba.NumberOfActiveSurfaces - 1; k++) {
                                mode_lib->vba.swath_width_luma_ub_this_state[k] =
@@ -2882,7 +2885,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
        }
 
        //Calculate Return BW
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j) {
                        for (k = 0; k <= mode_lib->vba.NumberOfActiveSurfaces - 1; k++) {
                                if (mode_lib->vba.BlendingAndTiming[k] == k) {
@@ -2961,7 +2964,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                        &mode_lib->vba.MinPrefetchMode,
                        &mode_lib->vba.MaxPrefetchMode);
 
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j)
                        mode_lib->vba.DCFCLKState[i][j] = mode_lib->vba.DCFCLKPerState[i];
        }
@@ -3083,7 +3086,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                                mode_lib->vba.DCFCLKState);
        } // UseMinimumRequiredDCFCLK == true
 
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j) {
                        mode_lib->vba.ReturnBWPerState[i][j] = dml32_get_return_bw_mbps(&mode_lib->vba.soc, i,
                                        mode_lib->vba.HostVMEnable, mode_lib->vba.DCFCLKState[i][j],
@@ -3092,7 +3095,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
        }
 
        //Re-ordering Buffer Support Check
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j) {
                        if ((mode_lib->vba.ROBBufferSizeInKByte - mode_lib->vba.PixelChunkSizeInKByte) * 1024
                                        / mode_lib->vba.ReturnBWPerState[i][j]
@@ -3114,7 +3117,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                                + mode_lib->vba.ReadBandwidthChroma[k];
        }
 
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j) {
                        mode_lib->vba.MaxTotalVerticalActiveAvailableBandwidth[i][j] =
                                dml_min3(mode_lib->vba.ReturnBusWidth * mode_lib->vba.DCFCLKState[i][j]
@@ -3138,7 +3141,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 
        /* Prefetch Check */
 
-       for (i = 0; i < (int) v->soc.num_states; ++i) {
+       for (i = start_state; i < (int) v->soc.num_states; ++i) {
                for (j = 0; j <= 1; ++j) {
 
                        mode_lib->vba.TimeCalc = 24 / mode_lib->vba.ProjectedDCFCLKDeepSleep[i][j];

diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_mode_lib.h b/drivers/gpu/drm/amd/display/dc/dml/display_mode_lib.h
index 3d643d5..a9d49ef 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/display_mode_lib.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/display_mode_lib.h
@@ -91,6 +91,7 @@ struct display_mode_lib {
        struct dal_logger *logger;
        struct dml_funcs funcs;
        struct _vcs_dpi_display_e2e_pipe_params_st dml_pipe_state[6];
+       bool validate_max_state;
 };
 
 void dml_init_instance(struct display_mode_lib *lib,