disp: msm: sde: update IB vote to include AB factor

With this change, the IB vote will be based on the following:

IB = AB_aggregated / number of DDR Channels / DRAM efficiency factor

Number of DDR Channels and DRAM efficiency factor are now device tree
properties which can be modified and parsed at boot up.

Change-Id: I298043807150faec1cbc0d74eefcdd1a534b460a
Signed-off-by: Samantha Tran <samtran@codeaurora.org>

msm/sde/sde_core_perf.c

@@ -713,6 +713,12 @@ static void _sde_core_perf_crtc_update_bus(struct sde_kms *kms,
 	bus_ab_quota = min(bus_ab_quota,
 			kms->catalog->perf.max_bw_high*1000ULL);
 
+	if (kms->catalog->perf.num_ddr_channels && kms->catalog->perf.dram_efficiency) {
+		bus_ib_quota = div_u64(div_u64(bus_ab_quota,
+			kms->catalog->perf.num_ddr_channels) * 100,
+			kms->catalog->perf.dram_efficiency);
+	}
+
 	if (kms->perf.perf_tune.mode == SDE_PERF_MODE_FIXED) {
 		bus_ab_quota = max(kms->perf.fix_core_ab_vote,
 					bus_ab_quota);

msm/sde/sde_hw_catalog.c

@@ -139,6 +139,8 @@
 		"NV12/5/1/1.25 AB24/5/1/1.25 XB24/5/1/1.25"
 #define DEFAULT_MAX_PER_PIPE_BW			2400000
 #define DEFAULT_AMORTIZABLE_THRESHOLD		25
+#define DEFAULT_NUM_DDR_CHANNELS		4
+#define DEFAULT_DRAM_EFFICIENCY			64
 #define DEFAULT_MNOC_PORTS			2
 #define DEFAULT_AXI_BUS_WIDTH			32
 #define DEFAULT_CPU_MASK			0
@@ -236,6 +238,8 @@ enum {
 	PERF_LINEAR_PREFILL_LINES,
 	PERF_DOWNSCALING_PREFILL_LINES,
 	PERF_XTRA_PREFILL_LINES,
+	PERF_NUM_DDR_CHANNELS,
+	PERF_DRAM_EFFICIENCY,
 	PERF_AMORTIZABLE_THRESHOLD,
 	PERF_NUM_MNOC_PORTS,
 	PERF_AXI_BUS_WIDTH,
@@ -633,6 +637,8 @@ static struct sde_prop_type sde_perf_prop[] = {
 			false, PROP_TYPE_U32},
 	{PERF_XTRA_PREFILL_LINES, "qcom,sde-xtra-prefill-lines",
 			false, PROP_TYPE_U32},
+	{PERF_NUM_DDR_CHANNELS, "qcom,sde-num-ddr-channels", false, PROP_TYPE_U32},
+	{PERF_DRAM_EFFICIENCY, "qcom,sde-dram-efficiency", false, PROP_TYPE_U32},
 	{PERF_AMORTIZABLE_THRESHOLD, "qcom,sde-amortizable-threshold",
 			false, PROP_TYPE_U32},
 	{PERF_NUM_MNOC_PORTS, "qcom,sde-num-mnoc-ports",
@@ -4342,6 +4348,12 @@ static void _sde_perf_parse_dt_cfg_populate(struct sde_mdss_cfg *cfg,
 			PROP_VALUE_ACCESS(prop_value,
 					PERF_AMORTIZABLE_THRESHOLD, 0) :
 			DEFAULT_AMORTIZABLE_THRESHOLD;
+	cfg->perf.num_ddr_channels = prop_exists[PERF_NUM_DDR_CHANNELS] ?
+			PROP_VALUE_ACCESS(prop_value, PERF_NUM_DDR_CHANNELS, 0) :
+			DEFAULT_NUM_DDR_CHANNELS;
+	cfg->perf.dram_efficiency = prop_exists[PERF_DRAM_EFFICIENCY] ?
+			PROP_VALUE_ACCESS(prop_value, PERF_DRAM_EFFICIENCY, 0) :
+			DEFAULT_DRAM_EFFICIENCY;
 	cfg->perf.num_mnoc_ports =
 			prop_exists[PERF_NUM_MNOC_PORTS] ?
 			PROP_VALUE_ACCESS(prop_value,

msm/sde/sde_hw_catalog.h

@@ -1431,6 +1431,8 @@ struct sde_sc_cfg {
  * @cpu_mask_perf:     pm_qos cpu silver core mask value
  * @cpu_dma_latency:   pm_qos cpu dma latency value
  * @cpu_irq_latency:   pm_qos cpu irq latency value
+ * @num_ddr_channels:  number of DDR channels
+ * @dram_efficiency:     DRAM efficiency factor
  * @axi_bus_width:     axi bus width value in bytes
  * @num_mnoc_ports:    number of mnoc ports
  */
@@ -1463,6 +1465,8 @@ struct sde_perf_cfg {
 	unsigned long cpu_mask_perf;
 	u32 cpu_dma_latency;
 	u32 cpu_irq_latency;
+	u32 num_ddr_channels;
+	u32 dram_efficiency;
 	u32 axi_bus_width;
 	u32 num_mnoc_ports;
 };