Merge drm/drm-next into drm-intel-next-queued

This is needed to get the fourcc code merged without conflicts.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

1 files changed, 209 insertions, 60 deletions

diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/drm_dsc.c
index bce99f95c1a3..77f4e5ae4197 100644
--- a/drivers/gpu/drm/drm_dsc.c
+++ b/drivers/gpu/drm/drm_dsc.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/byteorder/generic.h>
+#include <drm/drm_print.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_dsc.h>
 
@@ -31,75 +32,74 @@
 /**
  * drm_dsc_dp_pps_header_init() - Initializes the PPS Header
  * for DisplayPort as per the DP 1.4 spec.
- * @pps_sdp: Secondary data packet for DSC Picture Parameter Set
- *           as defined in &struct drm_dsc_pps_infoframe
+ * @pps_header: Secondary data packet header for DSC Picture
+ *              Parameter Set as defined in &struct dp_sdp_header
  *
  * DP 1.4 spec defines the secondary data packet for sending the
  * picture parameter infoframes from the source to the sink.
- * This function populates the pps header defined in
- * &struct drm_dsc_pps_infoframe as per the header bytes defined
- * in &struct dp_sdp_header.
+ * This function populates the SDP header defined in
+ * &struct dp_sdp_header.
  */
-void drm_dsc_dp_pps_header_init(struct drm_dsc_pps_infoframe *pps_sdp)
+void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header)
 {
-	memset(&pps_sdp->pps_header, 0, sizeof(pps_sdp->pps_header));
+	memset(pps_header, 0, sizeof(*pps_header));
 
-	pps_sdp->pps_header.HB1 = DP_SDP_PPS;
-	pps_sdp->pps_header.HB2 = DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1;
+	pps_header->HB1 = DP_SDP_PPS;
+	pps_header->HB2 = DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1;
 }
 EXPORT_SYMBOL(drm_dsc_dp_pps_header_init);
 
 /**
- * drm_dsc_pps_infoframe_pack() - Populates the DSC PPS infoframe
+ * drm_dsc_pps_payload_pack() - Populates the DSC PPS
  *
- * @pps_sdp:
- * Secondary data packet for DSC Picture Parameter Set. This is defined
- * by &struct drm_dsc_pps_infoframe
+ * @pps_payload:
+ * Bitwise struct for DSC Picture Parameter Set. This is defined
+ * by &struct drm_dsc_picture_parameter_set
  * @dsc_cfg:
  * DSC Configuration data filled by driver as defined by
  * &struct drm_dsc_config
  *
- * DSC source device sends a secondary data packet filled with all the
- * picture parameter set (PPS) information required by the sink to decode
- * the compressed frame. Driver populates the dsC PPS infoframe using the DSC
- * configuration parameters in the order expected by the DSC Display Sink
- * device. For the DSC, the sink device expects the PPS payload in the big
- * endian format for the fields that span more than 1 byte.
+ * DSC source device sends a picture parameter set (PPS) containing the
+ * information required by the sink to decode the compressed frame. Driver
+ * populates the DSC PPS struct using the DSC configuration parameters in
+ * the order expected by the DSC Display Sink device. For the DSC, the sink
+ * device expects the PPS payload in big endian format for fields
+ * that span more than 1 byte.
  */
-void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
+void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload,
 				const struct drm_dsc_config *dsc_cfg)
 {
 	int i;
 
 	/* Protect against someone accidently changing struct size */
-	BUILD_BUG_ON(sizeof(pps_sdp->pps_payload) !=
+	BUILD_BUG_ON(sizeof(*pps_payload) !=
 		     DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1 + 1);
 
-	memset(&pps_sdp->pps_payload, 0, sizeof(pps_sdp->pps_payload));
+	memset(pps_payload, 0, sizeof(*pps_payload));
 
 	/* PPS 0 */
-	pps_sdp->pps_payload.dsc_version =
+	pps_payload->dsc_version =
 		dsc_cfg->dsc_version_minor |
 		dsc_cfg->dsc_version_major << DSC_PPS_VERSION_MAJOR_SHIFT;
 
 	/* PPS 1, 2 is 0 */
 
 	/* PPS 3 */
-	pps_sdp->pps_payload.pps_3 =
+	pps_payload->pps_3 =
 		dsc_cfg->line_buf_depth |
 		dsc_cfg->bits_per_component << DSC_PPS_BPC_SHIFT;
 
 	/* PPS 4 */
-	pps_sdp->pps_payload.pps_4 =
+	pps_payload->pps_4 =
 		((dsc_cfg->bits_per_pixel & DSC_PPS_BPP_HIGH_MASK) >>
 		 DSC_PPS_MSB_SHIFT) |
 		dsc_cfg->vbr_enable << DSC_PPS_VBR_EN_SHIFT |
-		dsc_cfg->enable422 << DSC_PPS_SIMPLE422_SHIFT |
+		dsc_cfg->simple_422 << DSC_PPS_SIMPLE422_SHIFT |
 		dsc_cfg->convert_rgb << DSC_PPS_CONVERT_RGB_SHIFT |
 		dsc_cfg->block_pred_enable << DSC_PPS_BLOCK_PRED_EN_SHIFT;
 
 	/* PPS 5 */
-	pps_sdp->pps_payload.bits_per_pixel_low =
+	pps_payload->bits_per_pixel_low =
 		(dsc_cfg->bits_per_pixel & DSC_PPS_LSB_MASK);
 
 	/*
@@ -110,103 +110,103 @@ void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
 	 */
 
 	/* PPS 6, 7 */
-	pps_sdp->pps_payload.pic_height = cpu_to_be16(dsc_cfg->pic_height);
+	pps_payload->pic_height = cpu_to_be16(dsc_cfg->pic_height);
 
 	/* PPS 8, 9 */
-	pps_sdp->pps_payload.pic_width = cpu_to_be16(dsc_cfg->pic_width);
+	pps_payload->pic_width = cpu_to_be16(dsc_cfg->pic_width);
 
 	/* PPS 10, 11 */
-	pps_sdp->pps_payload.slice_height = cpu_to_be16(dsc_cfg->slice_height);
+	pps_payload->slice_height = cpu_to_be16(dsc_cfg->slice_height);
 
 	/* PPS 12, 13 */
-	pps_sdp->pps_payload.slice_width = cpu_to_be16(dsc_cfg->slice_width);
+	pps_payload->slice_width = cpu_to_be16(dsc_cfg->slice_width);
 
 	/* PPS 14, 15 */
-	pps_sdp->pps_payload.chunk_size = cpu_to_be16(dsc_cfg->slice_chunk_size);
+	pps_payload->chunk_size = cpu_to_be16(dsc_cfg->slice_chunk_size);
 
 	/* PPS 16 */
-	pps_sdp->pps_payload.initial_xmit_delay_high =
+	pps_payload->initial_xmit_delay_high =
 		((dsc_cfg->initial_xmit_delay &
 		  DSC_PPS_INIT_XMIT_DELAY_HIGH_MASK) >>
 		 DSC_PPS_MSB_SHIFT);
 
 	/* PPS 17 */
-	pps_sdp->pps_payload.initial_xmit_delay_low =
+	pps_payload->initial_xmit_delay_low =
 		(dsc_cfg->initial_xmit_delay & DSC_PPS_LSB_MASK);
 
 	/* PPS 18, 19 */
-	pps_sdp->pps_payload.initial_dec_delay =
+	pps_payload->initial_dec_delay =
 		cpu_to_be16(dsc_cfg->initial_dec_delay);
 
 	/* PPS 20 is 0 */
 
 	/* PPS 21 */
-	pps_sdp->pps_payload.initial_scale_value =
+	pps_payload->initial_scale_value =
 		dsc_cfg->initial_scale_value;
 
 	/* PPS 22, 23 */
-	pps_sdp->pps_payload.scale_increment_interval =
+	pps_payload->scale_increment_interval =
 		cpu_to_be16(dsc_cfg->scale_increment_interval);
 
 	/* PPS 24 */
-	pps_sdp->pps_payload.scale_decrement_interval_high =
+	pps_payload->scale_decrement_interval_high =
 		((dsc_cfg->scale_decrement_interval &
 		  DSC_PPS_SCALE_DEC_INT_HIGH_MASK) >>
 		 DSC_PPS_MSB_SHIFT);
 
 	/* PPS 25 */
-	pps_sdp->pps_payload.scale_decrement_interval_low =
+	pps_payload->scale_decrement_interval_low =
 		(dsc_cfg->scale_decrement_interval & DSC_PPS_LSB_MASK);
 
 	/* PPS 26[7:0], PPS 27[7:5] RESERVED */
 
 	/* PPS 27 */
-	pps_sdp->pps_payload.first_line_bpg_offset =
+	pps_payload->first_line_bpg_offset =
 		dsc_cfg->first_line_bpg_offset;
 
 	/* PPS 28, 29 */
-	pps_sdp->pps_payload.nfl_bpg_offset =
+	pps_payload->nfl_bpg_offset =
 		cpu_to_be16(dsc_cfg->nfl_bpg_offset);
 
 	/* PPS 30, 31 */
-	pps_sdp->pps_payload.slice_bpg_offset =
+	pps_payload->slice_bpg_offset =
 		cpu_to_be16(dsc_cfg->slice_bpg_offset);
 
 	/* PPS 32, 33 */
-	pps_sdp->pps_payload.initial_offset =
+	pps_payload->initial_offset =
 		cpu_to_be16(dsc_cfg->initial_offset);
 
 	/* PPS 34, 35 */
-	pps_sdp->pps_payload.final_offset = cpu_to_be16(dsc_cfg->final_offset);
+	pps_payload->final_offset = cpu_to_be16(dsc_cfg->final_offset);
 
 	/* PPS 36 */
-	pps_sdp->pps_payload.flatness_min_qp = dsc_cfg->flatness_min_qp;
+	pps_payload->flatness_min_qp = dsc_cfg->flatness_min_qp;
 
 	/* PPS 37 */
-	pps_sdp->pps_payload.flatness_max_qp = dsc_cfg->flatness_max_qp;
+	pps_payload->flatness_max_qp = dsc_cfg->flatness_max_qp;
 
 	/* PPS 38, 39 */
-	pps_sdp->pps_payload.rc_model_size =
+	pps_payload->rc_model_size =
 		cpu_to_be16(DSC_RC_MODEL_SIZE_CONST);
 
 	/* PPS 40 */
-	pps_sdp->pps_payload.rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST;
+	pps_payload->rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST;
 
 	/* PPS 41 */
-	pps_sdp->pps_payload.rc_quant_incr_limit0 =
+	pps_payload->rc_quant_incr_limit0 =
 		dsc_cfg->rc_quant_incr_limit0;
 
 	/* PPS 42 */
-	pps_sdp->pps_payload.rc_quant_incr_limit1 =
+	pps_payload->rc_quant_incr_limit1 =
 		dsc_cfg->rc_quant_incr_limit1;
 
 	/* PPS 43 */
-	pps_sdp->pps_payload.rc_tgt_offset = DSC_RC_TGT_OFFSET_LO_CONST |
+	pps_payload->rc_tgt_offset = DSC_RC_TGT_OFFSET_LO_CONST |
 		DSC_RC_TGT_OFFSET_HI_CONST << DSC_PPS_RC_TGT_OFFSET_HI_SHIFT;
 
 	/* PPS 44 - 57 */
 	for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++)
-		pps_sdp->pps_payload.rc_buf_thresh[i] =
+		pps_payload->rc_buf_thresh[i] =
 			dsc_cfg->rc_buf_thresh[i];
 
 	/* PPS 58 - 87 */
@@ -215,32 +215,181 @@ void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
 	 * are as follows: Min_qp[15:11], max_qp[10:6], offset[5:0]
 	 */
 	for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
-		pps_sdp->pps_payload.rc_range_parameters[i] =
+		pps_payload->rc_range_parameters[i] =
 			((dsc_cfg->rc_range_params[i].range_min_qp <<
 			  DSC_PPS_RC_RANGE_MINQP_SHIFT) |
 			 (dsc_cfg->rc_range_params[i].range_max_qp <<
 			  DSC_PPS_RC_RANGE_MAXQP_SHIFT) |
 			 (dsc_cfg->rc_range_params[i].range_bpg_offset));
-		pps_sdp->pps_payload.rc_range_parameters[i] =
-			cpu_to_be16(pps_sdp->pps_payload.rc_range_parameters[i]);
+		pps_payload->rc_range_parameters[i] =
+			cpu_to_be16(pps_payload->rc_range_parameters[i]);
 	}
 
 	/* PPS 88 */
-	pps_sdp->pps_payload.native_422_420 = dsc_cfg->native_422 |
+	pps_payload->native_422_420 = dsc_cfg->native_422 |
 		dsc_cfg->native_420 << DSC_PPS_NATIVE_420_SHIFT;
 
 	/* PPS 89 */
-	pps_sdp->pps_payload.second_line_bpg_offset =
+	pps_payload->second_line_bpg_offset =
 		dsc_cfg->second_line_bpg_offset;
 
 	/* PPS 90, 91 */
-	pps_sdp->pps_payload.nsl_bpg_offset =
+	pps_payload->nsl_bpg_offset =
 		cpu_to_be16(dsc_cfg->nsl_bpg_offset);
 
 	/* PPS 92, 93 */
-	pps_sdp->pps_payload.second_line_offset_adj =
+	pps_payload->second_line_offset_adj =
 		cpu_to_be16(dsc_cfg->second_line_offset_adj);
 
 	/* PPS 94 - 127 are O */
 }
-EXPORT_SYMBOL(drm_dsc_pps_infoframe_pack);
+EXPORT_SYMBOL(drm_dsc_pps_payload_pack);
+
+/**
+ * drm_dsc_compute_rc_parameters() - Write rate control
+ * parameters to the dsc configuration defined in
+ * &struct drm_dsc_config in accordance with the DSC 1.2
+ * specification. Some configuration fields must be present
+ * beforehand.
+ *
+ * @vdsc_cfg:
+ * DSC Configuration data partially filled by driver
+ */
+int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg)
+{
+	unsigned long groups_per_line = 0;
+	unsigned long groups_total = 0;
+	unsigned long num_extra_mux_bits = 0;
+	unsigned long slice_bits = 0;
+	unsigned long hrd_delay = 0;
+	unsigned long final_scale = 0;
+	unsigned long rbs_min = 0;
+
+	if (vdsc_cfg->native_420 || vdsc_cfg->native_422) {
+		/* Number of groups used to code each line of a slice */
+		groups_per_line = DIV_ROUND_UP(vdsc_cfg->slice_width / 2,
+					       DSC_RC_PIXELS_PER_GROUP);
+
+		/* chunksize in Bytes */
+		vdsc_cfg->slice_chunk_size = DIV_ROUND_UP(vdsc_cfg->slice_width / 2 *
+							  vdsc_cfg->bits_per_pixel,
+							  (8 * 16));
+	} else {
+		/* Number of groups used to code each line of a slice */
+		groups_per_line = DIV_ROUND_UP(vdsc_cfg->slice_width,
+					       DSC_RC_PIXELS_PER_GROUP);
+
+		/* chunksize in Bytes */
+		vdsc_cfg->slice_chunk_size = DIV_ROUND_UP(vdsc_cfg->slice_width *
+							  vdsc_cfg->bits_per_pixel,
+							  (8 * 16));
+	}
+
+	if (vdsc_cfg->convert_rgb)
+		num_extra_mux_bits = 3 * (vdsc_cfg->mux_word_size +
+					  (4 * vdsc_cfg->bits_per_component + 4)
+					  - 2);
+	else if (vdsc_cfg->native_422)
+		num_extra_mux_bits = 4 * vdsc_cfg->mux_word_size +
+			(4 * vdsc_cfg->bits_per_component + 4) +
+			3 * (4 * vdsc_cfg->bits_per_component) - 2;
+	else
+		num_extra_mux_bits = 3 * vdsc_cfg->mux_word_size +
+			(4 * vdsc_cfg->bits_per_component + 4) +
+			2 * (4 * vdsc_cfg->bits_per_component) - 2;
+	/* Number of bits in one Slice */
+	slice_bits = 8 * vdsc_cfg->slice_chunk_size * vdsc_cfg->slice_height;
+
+	while ((num_extra_mux_bits > 0) &&
+	       ((slice_bits - num_extra_mux_bits) % vdsc_cfg->mux_word_size))
+		num_extra_mux_bits--;
+
+	if (groups_per_line < vdsc_cfg->initial_scale_value - 8)
+		vdsc_cfg->initial_scale_value = groups_per_line + 8;
+
+	/* scale_decrement_interval calculation according to DSC spec 1.11 */
+	if (vdsc_cfg->initial_scale_value > 8)
+		vdsc_cfg->scale_decrement_interval = groups_per_line /
+			(vdsc_cfg->initial_scale_value - 8);
+	else
+		vdsc_cfg->scale_decrement_interval = DSC_SCALE_DECREMENT_INTERVAL_MAX;
+
+	vdsc_cfg->final_offset = vdsc_cfg->rc_model_size -
+		(vdsc_cfg->initial_xmit_delay *
+		 vdsc_cfg->bits_per_pixel + 8) / 16 + num_extra_mux_bits;
+
+	if (vdsc_cfg->final_offset >= vdsc_cfg->rc_model_size) {
+		DRM_DEBUG_KMS("FinalOfs < RcModelSze for this InitialXmitDelay\n");
+		return -ERANGE;
+	}
+
+	final_scale = (vdsc_cfg->rc_model_size * 8) /
+		(vdsc_cfg->rc_model_size - vdsc_cfg->final_offset);
+	if (vdsc_cfg->slice_height > 1)
+		/*
+		 * NflBpgOffset is 16 bit value with 11 fractional bits
+		 * hence we multiply by 2^11 for preserving the
+		 * fractional part
+		 */
+		vdsc_cfg->nfl_bpg_offset = DIV_ROUND_UP((vdsc_cfg->first_line_bpg_offset << 11),
+							(vdsc_cfg->slice_height - 1));
+	else
+		vdsc_cfg->nfl_bpg_offset = 0;
+
+	/* 2^16 - 1 */
+	if (vdsc_cfg->nfl_bpg_offset > 65535) {
+		DRM_DEBUG_KMS("NflBpgOffset is too large for this slice height\n");
+		return -ERANGE;
+	}
+
+	/* Number of groups used to code the entire slice */
+	groups_total = groups_per_line * vdsc_cfg->slice_height;
+
+	/* slice_bpg_offset is 16 bit value with 11 fractional bits */
+	vdsc_cfg->slice_bpg_offset = DIV_ROUND_UP(((vdsc_cfg->rc_model_size -
+						    vdsc_cfg->initial_offset +
+						    num_extra_mux_bits) << 11),
+						  groups_total);
+
+	if (final_scale > 9) {
+		/*
+		 * ScaleIncrementInterval =
+		 * finaloffset/((NflBpgOffset + SliceBpgOffset)*8(finalscale - 1.125))
+		 * as (NflBpgOffset + SliceBpgOffset) has 11 bit fractional value,
+		 * we need divide by 2^11 from pstDscCfg values
+		 */
+		vdsc_cfg->scale_increment_interval =
+				(vdsc_cfg->final_offset * (1 << 11)) /
+				((vdsc_cfg->nfl_bpg_offset +
+				vdsc_cfg->slice_bpg_offset) *
+				(final_scale - 9));
+	} else {
+		/*
+		 * If finalScaleValue is less than or equal to 9, a value of 0 should
+		 * be used to disable the scale increment at the end of the slice
+		 */
+		vdsc_cfg->scale_increment_interval = 0;
+	}
+
+	if (vdsc_cfg->scale_increment_interval > 65535) {
+		DRM_DEBUG_KMS("ScaleIncrementInterval is large for slice height\n");
+		return -ERANGE;
+	}
+
+	/*
+	 * DSC spec mentions that bits_per_pixel specifies the target
+	 * bits/pixel (bpp) rate that is used by the encoder,
+	 * in steps of 1/16 of a bit per pixel
+	 */
+	rbs_min = vdsc_cfg->rc_model_size - vdsc_cfg->initial_offset +
+		DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay *
+			     vdsc_cfg->bits_per_pixel, 16) +
+		groups_per_line * vdsc_cfg->first_line_bpg_offset;
+
+	hrd_delay = DIV_ROUND_UP((rbs_min * 16), vdsc_cfg->bits_per_pixel);
+	vdsc_cfg->rc_bits = (hrd_delay * vdsc_cfg->bits_per_pixel) / 16;
+	vdsc_cfg->initial_dec_delay = hrd_delay - vdsc_cfg->initial_xmit_delay;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_dsc_compute_rc_parameters);