drm/i915/tgl: Drop support for pre-production steppings

Several post-TGL platforms have been brought up now, so we're well past
the point where we usually drop the workarounds that are only applicable
to internal/pre-production hardware.

Production TGL hardware always has display stepping C0 or later and GT
stepping B0 or later (this is true for both the original TGL and the U/Y
subplatform).

Bspec 44455
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230127224313.4042331-2-matthew.d.roper@intel.com

drivers/gpu/drm/i915/display/intel_display_power.c

@@ -1581,9 +1581,8 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv)
 
 	if (IS_ALDERLAKE_S(dev_priv) ||
 	    IS_DG1_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
-	    IS_RKL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
-	    IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_C0))
-		/* Wa_1409767108:tgl,dg1,adl-s */
+	    IS_RKL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+		/* Wa_1409767108 */
 		table = wa_1409767108_buddy_page_masks;
 	else
 		table = tgl_buddy_page_masks;

drivers/gpu/drm/i915/display/intel_psr.c

@@ -591,12 +591,6 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 	if (intel_dp->psr.psr2_sel_fetch_enabled) {
 		u32 tmp;
 
-		/* Wa_1408330847 */
-		if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
-			intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
-				     DIS_RAM_BYPASS_PSR2_MAN_TRACK,
-				     DIS_RAM_BYPASS_PSR2_MAN_TRACK);
-
 		tmp = intel_de_read(dev_priv, PSR2_MAN_TRK_CTL(intel_dp->psr.transcoder));
 		drm_WARN_ON(&dev_priv->drm, !(tmp & PSR2_MAN_TRK_CTL_ENABLE));
 	} else if (HAS_PSR2_SEL_FETCH(dev_priv)) {
@@ -765,13 +759,6 @@ static bool intel_psr2_sel_fetch_config_valid(struct intel_dp *intel_dp,
 		return false;
 	}
 
-	/* Wa_14010254185 Wa_14010103792 */
-	if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_C0)) {
-		drm_dbg_kms(&dev_priv->drm,
-			    "PSR2 sel fetch not enabled, missing the implementation of WAs\n");
-		return false;
-	}
-
 	return crtc_state->enable_psr2_sel_fetch = true;
 }
 
@@ -945,13 +932,6 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 		}
 	}
 
-	/* Wa_2209313811 */
-	if (!crtc_state->enable_psr2_sel_fetch &&
-	    IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_C0)) {
-		drm_dbg_kms(&dev_priv->drm, "PSR2 HW tracking is not supported this Display stepping\n");
-		goto unsupported;
-	}
-
 	if (!psr2_granularity_check(intel_dp, crtc_state)) {
 		drm_dbg_kms(&dev_priv->drm, "PSR2 not enabled, SU granularity not compatible\n");
 		goto unsupported;
@@ -1360,12 +1340,6 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
 	intel_psr_exit(intel_dp);
 	intel_psr_wait_exit_locked(intel_dp);
 
-	/* Wa_1408330847 */
-	if (intel_dp->psr.psr2_sel_fetch_enabled &&
-	    IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
-		intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
-			     DIS_RAM_BYPASS_PSR2_MAN_TRACK, 0);
-
 	/*
 	 * Wa_16013835468
 	 * Wa_14015648006

drivers/gpu/drm/i915/display/skl_universal_plane.c

@@ -2182,7 +2182,7 @@ static bool gen12_plane_has_mc_ccs(struct drm_i915_private *i915,
 	if (DISPLAY_VER(i915) < 12)
 		return false;
 
-	/* Wa_14010477008:tgl[a0..c0],rkl[all],dg1[all] */
+	/* Wa_14010477008 */
 	if (IS_DG1(i915) || IS_ROCKETLAKE(i915) ||
 	    IS_TGL_DISPLAY_STEP(i915, STEP_A0, STEP_D0))
 		return false;

drivers/gpu/drm/i915/gt/intel_workarounds.c

@@ -1440,31 +1440,6 @@ gen12_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 	wa_mcr_write_or(wal, GEN10_DFR_RATIO_EN_AND_CHICKEN, DFR_DISABLE);
 }
 
-static void
-tgl_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
-{
-	struct drm_i915_private *i915 = gt->i915;
-
-	gen12_gt_workarounds_init(gt, wal);
-
-	/* Wa_1409420604:tgl */
-	if (IS_TGL_UY_GRAPHICS_STEP(i915, STEP_A0, STEP_B0))
-		wa_mcr_write_or(wal,
-				SUBSLICE_UNIT_LEVEL_CLKGATE2,
-				CPSSUNIT_CLKGATE_DIS);
-
-	/* Wa_1607087056:tgl also know as BUG:1409180338 */
-	if (IS_TGL_UY_GRAPHICS_STEP(i915, STEP_A0, STEP_B0))
-		wa_write_or(wal,
-			    GEN11_SLICE_UNIT_LEVEL_CLKGATE,
-			    L3_CLKGATE_DIS | L3_CR2X_CLKGATE_DIS);
-
-	/* Wa_1408615072:tgl[a0] */
-	if (IS_TGL_UY_GRAPHICS_STEP(i915, STEP_A0, STEP_B0))
-		wa_write_or(wal, UNSLICE_UNIT_LEVEL_CLKGATE2,
-			    VSUNIT_CLKGATE_DIS_TGL);
-}
-
 static void
 dg1_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 {
@@ -1700,8 +1675,6 @@ gt_init_workarounds(struct intel_gt *gt, struct i915_wa_list *wal)
 		xehpsdv_gt_workarounds_init(gt, wal);
 	else if (IS_DG1(i915))
 		dg1_gt_workarounds_init(gt, wal);
-	else if (IS_TIGERLAKE(i915))
-		tgl_gt_workarounds_init(gt, wal);
 	else if (GRAPHICS_VER(i915) == 12)
 		gen12_gt_workarounds_init(gt, wal);
 	else if (GRAPHICS_VER(i915) == 11)
@@ -2450,27 +2423,16 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 			   true);
 	}
 
-	if (IS_DG1_GRAPHICS_STEP(i915, STEP_A0, STEP_B0) ||
-	    IS_TGL_UY_GRAPHICS_STEP(i915, STEP_A0, STEP_B0)) {
+	if (IS_DG1_GRAPHICS_STEP(i915, STEP_A0, STEP_B0)) {
 		/*
-		 * Wa_1607138336:tgl[a0],dg1[a0]
-		 * Wa_1607063988:tgl[a0],dg1[a0]
+		 * Wa_1607138336
+		 * Wa_1607063988
 		 */
 		wa_write_or(wal,
 			    GEN9_CTX_PREEMPT_REG,
 			    GEN12_DISABLE_POSH_BUSY_FF_DOP_CG);
 	}
 
-	if (IS_TGL_UY_GRAPHICS_STEP(i915, STEP_A0, STEP_B0)) {
-		/*
-		 * Wa_1606679103:tgl
-		 * (see also Wa_1606682166:icl)
-		 */
-		wa_write_or(wal,
-			    GEN7_SARCHKMD,
-			    GEN7_DISABLE_SAMPLER_PREFETCH);
-	}
-
 	if (IS_ALDERLAKE_P(i915) || IS_ALDERLAKE_S(i915) || IS_DG1(i915) ||
 	    IS_ROCKETLAKE(i915) || IS_TIGERLAKE(i915)) {
 		/* Wa_1606931601:tgl,rkl,dg1,adl-s,adl-p */

drivers/gpu/drm/i915/i915_driver.c

@@ -167,6 +167,7 @@ static void intel_detect_preproduction_hw(struct drm_i915_private *dev_priv)
 	pre |= IS_KABYLAKE(dev_priv) && INTEL_REVID(dev_priv) < 0x1;
 	pre |= IS_GEMINILAKE(dev_priv) && INTEL_REVID(dev_priv) < 0x3;
 	pre |= IS_ICELAKE(dev_priv) && INTEL_REVID(dev_priv) < 0x7;
+	pre |= IS_TIGERLAKE(dev_priv) && INTEL_REVID(dev_priv) < 0x1;
 
 	if (pre) {
 		drm_err(&dev_priv->drm, "This is a pre-production stepping. "

drivers/gpu/drm/i915/i915_drv.h

@@ -653,14 +653,6 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 	(IS_TIGERLAKE(__i915) && \
 	 IS_DISPLAY_STEP(__i915, since, until))
 
-#define IS_TGL_UY_GRAPHICS_STEP(__i915, since, until) \
-	(IS_TGL_UY(__i915) && \
-	 IS_GRAPHICS_STEP(__i915, since, until))
-
-#define IS_TGL_GRAPHICS_STEP(__i915, since, until) \
-	(IS_TIGERLAKE(__i915) && !IS_TGL_UY(__i915)) && \
-	 IS_GRAPHICS_STEP(__i915, since, until))
-
 #define IS_RKL_DISPLAY_STEP(p, since, until) \
 	(IS_ROCKETLAKE(p) && IS_DISPLAY_STEP(p, since, until))
 

drivers/gpu/drm/i915/intel_pm.c

@@ -4336,10 +4336,6 @@ static void gen12lp_init_clock_gating(struct drm_i915_private *dev_priv)
 		intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A),
 				   DPFC_CHICKEN_COMP_DUMMY_PIXEL);
 
-	/* Wa_1409825376:tgl (pre-prod)*/
-	if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_C0))
-		intel_uncore_rmw(&dev_priv->uncore, GEN9_CLKGATE_DIS_3, 0, TGL_VRH_GATING_DIS);
-
 	/* Wa_14013723622:tgl,rkl,dg1,adl-s */
 	if (DISPLAY_VER(dev_priv) == 12)
 		intel_uncore_rmw(&dev_priv->uncore, CLKREQ_POLICY,