drm/i915/vdsc: Add support for read/write PPS for 3rd DSC engine

With BMG each pipe has 3 DSC engines, so add bits to read/write the PPS
registers for the 3rd DSC engine

Signed-off-by: Ankit Nautiyal <[email protected]>
Reviewed-by: Suraj Kandpal <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: aknautiyal

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

@@ -402,8 +402,10 @@ static void intel_dsc_get_pps_reg(const struct intel_crtc_state *crtc_state, int
 
 	pipe_dsc = is_pipe_dsc(crtc, cpu_transcoder);
 
-	if (dsc_reg_num >= 3)
+	if (dsc_reg_num >= 4)
 		MISSING_CASE(dsc_reg_num);
+	if (dsc_reg_num >= 3)
+		dsc_reg[2] = BMG_DSC2_PPS(pipe, pps);
 	if (dsc_reg_num >= 2)
 		dsc_reg[1] = pipe_dsc ? ICL_DSC1_PPS(pipe, pps) : DSCC_PPS(pps);
 	if (dsc_reg_num >= 1)
@@ -415,7 +417,7 @@ static void intel_dsc_pps_write(const struct intel_crtc_state *crtc_state,
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
-	i915_reg_t dsc_reg[2];
+	i915_reg_t dsc_reg[3];
 	int i, vdsc_per_pipe, dsc_reg_num;
 
 	vdsc_per_pipe = intel_dsc_get_vdsc_per_pipe(crtc_state);
@@ -815,7 +817,7 @@ static u32 intel_dsc_pps_read(struct intel_crtc_state *crtc_state, int pps,
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
-	i915_reg_t dsc_reg[2];
+	i915_reg_t dsc_reg[3];
 	int i, vdsc_per_pipe, dsc_reg_num;
 	u32 val;
 

drivers/gpu/drm/i915/display/intel_vdsc_regs.h

@@ -59,8 +59,10 @@
 #define DSCC_PPS(pps)				_MMIO(_DSCC_PPS_0 + ((pps) < 12 ? (pps) : (pps) + 12) * 4)
 #define _ICL_DSC0_PICTURE_PARAMETER_SET_0_PB	0x78270
 #define _ICL_DSC1_PICTURE_PARAMETER_SET_0_PB	0x78370
+#define _BMG_DSC2_PICTURE_PARAMETER_SET_0_PB	0x78970
 #define _ICL_DSC0_PICTURE_PARAMETER_SET_0_PC	0x78470
 #define _ICL_DSC1_PICTURE_PARAMETER_SET_0_PC	0x78570
+#define _BMG_DSC2_PICTURE_PARAMETER_SET_0_PC	0x78A70
 #define ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe)	_MMIO_PIPE((pipe) - PIPE_B, \
 							   _ICL_DSC0_PICTURE_PARAMETER_SET_0_PB, \
 							   _ICL_DSC0_PICTURE_PARAMETER_SET_0_PC)
@@ -73,8 +75,12 @@
 #define _ICL_DSC1_PPS_0(pipe)			_PICK_EVEN((pipe) - PIPE_B, \
 							   _ICL_DSC1_PICTURE_PARAMETER_SET_0_PB, \
 							   _ICL_DSC1_PICTURE_PARAMETER_SET_0_PC)
+#define _BMG_DSC2_PPS_0(pipe)			_PICK_EVEN((pipe) - PIPE_B, \
+							   _BMG_DSC2_PICTURE_PARAMETER_SET_0_PB, \
+							   _BMG_DSC2_PICTURE_PARAMETER_SET_0_PC)
 #define  ICL_DSC0_PPS(pipe, pps)		_MMIO(_ICL_DSC0_PPS_0(pipe) + ((pps) * 4))
 #define  ICL_DSC1_PPS(pipe, pps)		_MMIO(_ICL_DSC1_PPS_0(pipe) + ((pps) * 4))
+#define  BMG_DSC2_PPS(pipe, pps)		_MMIO(_BMG_DSC2_PPS_0(pipe) + ((pps) * 4))
 
 /* PPS 0 */
 #define   DSC_PPS0_NATIVE_422_ENABLE		REG_BIT(23)