drm/i915/display: Drop PSR support from HSW and BDW

At this point is sure that HSW and BDW will never have PSR enabled by
default, so here dropping it from device info and cleaning up code.

v2:
- enable psr support for display 9
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: NJosé Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827174253.51122-1-jose.souza@intel.com

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

@@ -364,41 +364,6 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 	}
 }
 
-static void hsw_psr_setup_aux(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 aux_clock_divider, aux_ctl;
-	int i;
-	static const u8 aux_msg[] = {
-		[0] = DP_AUX_NATIVE_WRITE << 4,
-		[1] = DP_SET_POWER >> 8,
-		[2] = DP_SET_POWER & 0xff,
-		[3] = 1 - 1,
-		[4] = DP_SET_POWER_D0,
-	};
-	u32 psr_aux_mask = EDP_PSR_AUX_CTL_TIME_OUT_MASK |
-			   EDP_PSR_AUX_CTL_MESSAGE_SIZE_MASK |
-			   EDP_PSR_AUX_CTL_PRECHARGE_2US_MASK |
-			   EDP_PSR_AUX_CTL_BIT_CLOCK_2X_MASK;
-
-	BUILD_BUG_ON(sizeof(aux_msg) > 20);
-	for (i = 0; i < sizeof(aux_msg); i += 4)
-		intel_de_write(dev_priv,
-			       EDP_PSR_AUX_DATA(intel_dp->psr.transcoder, i >> 2),
-			       intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i));
-
-	aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0);
-
-	/* Start with bits set for DDI_AUX_CTL register */
-	aux_ctl = intel_dp->get_aux_send_ctl(intel_dp, sizeof(aux_msg),
-					     aux_clock_divider);
-
-	/* Select only valid bits for SRD_AUX_CTL */
-	aux_ctl &= psr_aux_mask;
-	intel_de_write(dev_priv, EDP_PSR_AUX_CTL(intel_dp->psr.transcoder),
-		       aux_ctl);
-}
-
 static void intel_psr_enable_sink(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
@@ -621,9 +586,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 static bool
 transcoder_has_psr2(struct drm_i915_private *dev_priv, enum transcoder trans)
 {
-	if (DISPLAY_VER(dev_priv) < 9)
-		return false;
-	else if (DISPLAY_VER(dev_priv) >= 12)
+	if (DISPLAY_VER(dev_priv) >= 12)
 		return trans == TRANSCODER_A;
 	else
 		return trans == TRANSCODER_EDP;
@@ -1114,12 +1077,6 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
 	enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
 	u32 mask;
 
-	/* Only HSW and BDW have PSR AUX registers that need to be setup. SKL+
-	 * use hardcoded values PSR AUX transactions
-	 */
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		hsw_psr_setup_aux(intel_dp);
-
 	if (intel_dp->psr.psr2_enabled && DISPLAY_VER(dev_priv) == 9) {
 		i915_reg_t reg = CHICKEN_TRANS(cpu_transcoder);
 		u32 chicken = intel_de_read(dev_priv, reg);
@@ -1460,23 +1417,16 @@ static void psr_force_hw_tracking_exit(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 
-	if (DISPLAY_VER(dev_priv) >= 9)
-		/*
-		 * Display WA #0884: skl+
-		 * This documented WA for bxt can be safely applied
-		 * broadly so we can force HW tracking to exit PSR
-		 * instead of disabling and re-enabling.
-		 * Workaround tells us to write 0 to CUR_SURFLIVE_A,
-		 * but it makes more sense write to the current active
-		 * pipe.
-		 */
-		intel_de_write(dev_priv, CURSURFLIVE(intel_dp->psr.pipe), 0);
-	else
-		/*
-		 * A write to CURSURFLIVE do not cause HW tracking to exit PSR
-		 * on older gens so doing the manual exit instead.
-		 */
-		intel_psr_exit(intel_dp);
+	/*
+	 * Display WA #0884: skl+
+	 * This documented WA for bxt can be safely applied
+	 * broadly so we can force HW tracking to exit PSR
+	 * instead of disabling and re-enabling.
+	 * Workaround tells us to write 0 to CUR_SURFLIVE_A,
+	 * but it makes more sense write to the current active
+	 * pipe.
+	 */
+	intel_de_write(dev_priv, CURSURFLIVE(intel_dp->psr.pipe), 0);
 }
 
 void intel_psr2_program_plane_sel_fetch(struct intel_plane *plane,
@@ -1744,7 +1694,6 @@ void intel_psr_update(struct intel_dp *intel_dp,
 		      const struct intel_crtc_state *crtc_state,
 		      const struct drm_connector_state *conn_state)
 {
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 	struct intel_psr *psr = &intel_dp->psr;
 	bool enable, psr2_enable;
 
@@ -1761,15 +1710,6 @@ void intel_psr_update(struct intel_dp *intel_dp,
 		/* Force a PSR exit when enabling CRC to avoid CRC timeouts */
 		if (crtc_state->crc_enabled && psr->enabled)
 			psr_force_hw_tracking_exit(intel_dp);
-		else if (DISPLAY_VER(dev_priv) < 9 && psr->enabled) {
-			/*
-			 * Activate PSR again after a force exit when enabling
-			 * CRC in older gens
-			 */
-			if (!intel_dp->psr.active &&
-			    !intel_dp->psr.busy_frontbuffer_bits)
-				schedule_work(&intel_dp->psr.work);
-		}
 
 		goto unlock;
 	}
@@ -2182,23 +2122,12 @@ void intel_psr_init(struct intel_dp *intel_dp)
 
 	intel_dp->psr.source_support = true;
 
-	if (IS_HASWELL(dev_priv))
-		/*
-		 * HSW don't have PSR registers on the same space as transcoder
-		 * so set this to a value that when subtract to the register
-		 * in transcoder space results in the right offset for HSW
-		 */
-		dev_priv->hsw_psr_mmio_adjust = _SRD_CTL_EDP - _HSW_EDP_PSR_BASE;
-
 	if (dev_priv->params.enable_psr == -1)
-		if (DISPLAY_VER(dev_priv) < 9 || !dev_priv->vbt.psr.enable)
+		if (!dev_priv->vbt.psr.enable)
 			dev_priv->params.enable_psr = 0;
 
 	/* Set link_standby x link_off defaults */
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		/* HSW and BDW require workarounds that we don't implement. */
-		intel_dp->psr.link_standby = false;
-	else if (DISPLAY_VER(dev_priv) < 12)
+	if (DISPLAY_VER(dev_priv) < 12)
 		/* For new platforms up to TGL let's respect VBT back again */
 		intel_dp->psr.link_standby = dev_priv->vbt.psr.full_link;
 

drivers/gpu/drm/i915/i915_drv.h

@@ -885,8 +885,6 @@ struct drm_i915_private {
 	 */
 	u32 gpio_mmio_base;
 
-	u32 hsw_psr_mmio_adjust;
-
 	/* MMIO base address for MIPI regs */
 	u32 mipi_mmio_base;
 

drivers/gpu/drm/i915/i915_irq.c

@@ -2123,22 +2123,6 @@ static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
 	if (de_iir & DE_ERR_INT_IVB)
 		ivb_err_int_handler(dev_priv);
 
-	if (de_iir & DE_EDP_PSR_INT_HSW) {
-		struct intel_encoder *encoder;
-
-		for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) {
-			struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
-			u32 psr_iir = intel_uncore_read(&dev_priv->uncore,
-							EDP_PSR_IIR);
-
-			intel_psr_irq_handler(intel_dp, psr_iir);
-			intel_uncore_write(&dev_priv->uncore,
-					   EDP_PSR_IIR, psr_iir);
-			break;
-		}
-	}
-
 	if (de_iir & DE_AUX_CHANNEL_A_IVB)
 		dp_aux_irq_handler(dev_priv);
 

drivers/gpu/drm/i915/i915_pci.c

@@ -537,8 +537,6 @@ static const struct intel_device_info vlv_info = {
 		BIT(TRANSCODER_C) | BIT(TRANSCODER_EDP), \
 	.display.has_ddi = 1, \
 	.display.has_fpga_dbg = 1, \
-	.display.has_psr = 1, \
-	.display.has_psr_hw_tracking = 1, \
 	.display.has_dp_mst = 1, \
 	.has_rc6p = 0 /* RC6p removed-by HSW */, \
 	HSW_PIPE_OFFSETS, \
@@ -642,6 +640,8 @@ static const struct intel_device_info chv_info = {
 	.has_gt_uc = 1, \
 	.display.has_hdcp = 1, \
 	.display.has_ipc = 1, \
+	.display.has_psr = 1, \
+	.display.has_psr_hw_tracking = 1, \
 	.dbuf.size = 896 - 4, /* 4 blocks for bypass path allocation */ \
 	.dbuf.slice_mask = BIT(DBUF_S1)
 

drivers/gpu/drm/i915/i915_reg.h

@@ -4513,11 +4513,9 @@ enum {
  * HSW PSR registers are relative to DDIA(_DDI_BUF_CTL_A + 0x800) with just one
  * instance of it
  */
-#define _HSW_EDP_PSR_BASE			0x64800
 #define _SRD_CTL_A				0x60800
 #define _SRD_CTL_EDP				0x6f800
-#define _PSR_ADJ(tran, reg)			(_TRANS2(tran, reg) - dev_priv->hsw_psr_mmio_adjust)
-#define EDP_PSR_CTL(tran)			_MMIO(_PSR_ADJ(tran, _SRD_CTL_A))
+#define EDP_PSR_CTL(tran)			_MMIO(_TRANS2(tran, _SRD_CTL_A))
 #define   EDP_PSR_ENABLE			(1 << 31)
 #define   BDW_PSR_SINGLE_FRAME			(1 << 30)
 #define   EDP_PSR_RESTORE_PSR_ACTIVE_CTX_MASK	(1 << 29) /* SW can't modify */
@@ -4561,22 +4559,13 @@ enum {
 #define   EDP_PSR_POST_EXIT(trans)		(0x2 << _EDP_PSR_TRANS_SHIFT(trans))
 #define   EDP_PSR_PRE_ENTRY(trans)		(0x1 << _EDP_PSR_TRANS_SHIFT(trans))
 
-#define _SRD_AUX_CTL_A				0x60810
-#define _SRD_AUX_CTL_EDP			0x6f810
-#define EDP_PSR_AUX_CTL(tran)			_MMIO(_PSR_ADJ(tran, _SRD_AUX_CTL_A))
-#define   EDP_PSR_AUX_CTL_TIME_OUT_MASK		(3 << 26)
-#define   EDP_PSR_AUX_CTL_MESSAGE_SIZE_MASK	(0x1f << 20)
-#define   EDP_PSR_AUX_CTL_PRECHARGE_2US_MASK	(0xf << 16)
-#define   EDP_PSR_AUX_CTL_ERROR_INTERRUPT	(1 << 11)
-#define   EDP_PSR_AUX_CTL_BIT_CLOCK_2X_MASK	(0x7ff)
-
 #define _SRD_AUX_DATA_A				0x60814
 #define _SRD_AUX_DATA_EDP			0x6f814
-#define EDP_PSR_AUX_DATA(tran, i)		_MMIO(_PSR_ADJ(tran, _SRD_AUX_DATA_A) + (i) + 4) /* 5 registers */
+#define EDP_PSR_AUX_DATA(tran, i)		_MMIO(_TRANS2(tran, _SRD_AUX_DATA_A) + (i) + 4) /* 5 registers */
 
 #define _SRD_STATUS_A				0x60840
 #define _SRD_STATUS_EDP				0x6f840
-#define EDP_PSR_STATUS(tran)			_MMIO(_PSR_ADJ(tran, _SRD_STATUS_A))
+#define EDP_PSR_STATUS(tran)			_MMIO(_TRANS2(tran, _SRD_STATUS_A))
 #define   EDP_PSR_STATUS_STATE_MASK		(7 << 29)
 #define   EDP_PSR_STATUS_STATE_SHIFT		29
 #define   EDP_PSR_STATUS_STATE_IDLE		(0 << 29)
@@ -4603,13 +4592,13 @@ enum {
 
 #define _SRD_PERF_CNT_A			0x60844
 #define _SRD_PERF_CNT_EDP		0x6f844
-#define EDP_PSR_PERF_CNT(tran)		_MMIO(_PSR_ADJ(tran, _SRD_PERF_CNT_A))
+#define EDP_PSR_PERF_CNT(tran)		_MMIO(_TRANS2(tran, _SRD_PERF_CNT_A))
 #define   EDP_PSR_PERF_CNT_MASK		0xffffff
 
 /* PSR_MASK on SKL+ */
 #define _SRD_DEBUG_A				0x60860
 #define _SRD_DEBUG_EDP				0x6f860
-#define EDP_PSR_DEBUG(tran)			_MMIO(_PSR_ADJ(tran, _SRD_DEBUG_A))
+#define EDP_PSR_DEBUG(tran)			_MMIO(_TRANS2(tran, _SRD_DEBUG_A))
 #define   EDP_PSR_DEBUG_MASK_MAX_SLEEP         (1 << 28)
 #define   EDP_PSR_DEBUG_MASK_LPSP              (1 << 27)
 #define   EDP_PSR_DEBUG_MASK_MEMUP             (1 << 26)