[PATCH 15/26] drm/i915/vdsc: Add register bits for VDSC2 engine

[Ankit Nautiyal]

Add bits to enable third VDSC engine VDSC2.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 .../drm/i915/display/intel_display_types.h    |  1 +
 drivers/gpu/drm/i915/display/intel_vdsc.c     | 20 +++++++++++++++----
 .../gpu/drm/i915/display/intel_vdsc_regs.h    |  4 ++++
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 5aefd7800659..dfb087e914a7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1046,6 +1046,7 @@ struct intel_csc_matrix {
 enum intel_dsc_split_state {
 	DSC_SPLIT_DISABLED,
 	DSC_SPLIT_2_STREAMS,
+	DSC_SPLIT_3_STREAMS,
 };
 
 struct intel_crtc_state {
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 0d5052e67ce8..b2fed274ad0e 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -376,6 +376,8 @@ static int intel_dsc_get_vdsc_per_pipe(const struct intel_crtc_state *crtc_state
 	switch (crtc_state->dsc.dsc_split) {
 	case DSC_SPLIT_2_STREAMS :
 		return 2;
+	case DSC_SPLIT_3_STREAMS :
+		return 3;
 	case DSC_SPLIT_DISABLED :
 	default :
 		break;
@@ -786,6 +788,12 @@ void intel_dsc_enable(const struct intel_crtc_state *crtc_state)
 		dss_ctl2_val |= VDSC1_ENABLE;
 		dss_ctl1_val |= JOINER_ENABLE;
 	}
+
+	if (vdsc_instances_per_pipe > 2) {
+		dss_ctl2_val |= VDSC2_ENABLE;
+		dss_ctl2_val |= SMALL_JOINER_CONFIG_3_ENGINES;
+	}
+
 	if (crtc_state->joiner_pipes) {
 		/*
 		 * This bit doesn't seem to follow master/slave logic or
@@ -992,11 +1000,15 @@ void intel_dsc_get_config(struct intel_crtc_state *crtc_state)
 	if (!crtc_state->dsc.compression_enable)
 		goto out;
 
-	if ((dss_ctl1 & JOINER_ENABLE) &&
-	    (dss_ctl2 & VDSC1_ENABLE))
-		crtc_state->dsc.dsc_split = DSC_SPLIT_2_STREAMS;
-	else
+	if (dss_ctl1 & JOINER_ENABLE) {
+		if (dss_ctl2 & (VDSC2_ENABLE | SMALL_JOINER_CONFIG_3_ENGINES))
+			crtc_state->dsc.dsc_split = DSC_SPLIT_3_STREAMS;
+
+		else if (dss_ctl2 & VDSC1_ENABLE)
+			crtc_state->dsc.dsc_split = DSC_SPLIT_2_STREAMS;
+	} else {
 		crtc_state->dsc.dsc_split = DSC_SPLIT_DISABLED;
+	}
 
 	intel_dsc_get_pps_config(crtc_state);
 out:
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc_regs.h b/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
index 87d230f061e5..3ee99ad07adb 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
@@ -22,6 +22,10 @@
 
 #define DSS_CTL2				_MMIO(0x67404)
 #define  VDSC0_ENABLE				REG_BIT(31)
+#define  VDSC2_ENABLE				REG_BIT(30)
+#define  SMALL_JOINER_CONFIG_3_ENGINES		REG_BIT(23)
+#define  ODD_PIXEL_REMOVAL			REG_BIT(18)
+#define  ODD_PIXEL_REMOVAL_CONFIG_EOL		REG_BIT(17)
 #define  VDSC1_ENABLE				REG_BIT(15)
 #define  RIGHT_DL_BUF_TARGET_DEPTH_MASK		(0xfff << 0)
 #define  RIGHT_DL_BUF_TARGET_DEPTH(pixels)	((pixels) << 0)
-- 
2.45.2