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Commit 3e9202c1 authored by Govindaraj Rajagopal's avatar Govindaraj Rajagopal Committed by Gerrit - the friendly Code Review server
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msm: vidc: refine clock calculation for both encoder and decoder 



Refined vsp & vpp cycle calculation for both encoder and decoder
based on vperf recommendation.

Change-Id: I41aa737dc010c2434afb85df3f97608f73470183
Signed-off-by: default avatarGovindaraj Rajagopal <grajagop@codeaurora.org>
parent 4c16f4bd

drivers/media/platform/msm/vidc/msm_vidc_clocks.c

+21 −8
Original line number Diff line number Diff line
@@ -633,6 +633,7 @@ static unsigned long msm_vidc_calc_freq(struct msm_vidc_inst *inst, 
	u32 filled_len)

{

	unsigned long freq = 0;

	unsigned long sw_overhead = 0;

	unsigned long vpp_cycles = 0, vsp_cycles = 0;

	unsigned long fw_cycles = 0, fw_vpp_cycles = 0;

	u32 vpp_cycles_per_mb;
@@ -668,9 +669,6 @@ static unsigned long msm_vidc_calc_freq(struct msm_vidc_inst *inst, 


		vpp_cycles = mbs_per_second * vpp_cycles_per_mb /

				inst->clk_data.work_route;

		/* 21 / 20 is minimum overhead factor */

		vpp_cycles += max(vpp_cycles / 20, fw_vpp_cycles);



		vsp_cycles = mbs_per_second * inst->clk_data.entry->vsp_cycles;



		/* bitrate is based on fps, scale it using operating rate */
@@ -682,21 +680,36 @@ static unsigned long msm_vidc_calc_freq(struct msm_vidc_inst *inst, 
		vsp_cycles += ((u64)inst->clk_data.bitrate * vsp_factor_num) /

				vsp_factor_den;



	} else if (inst->session_type == MSM_VIDC_DECODER) {

		vpp_cycles = mbs_per_second * inst->clk_data.entry->vpp_cycles /

				inst->clk_data.work_route;

		/* sw overhead factor */

		sw_overhead = ((u64)vsp_cycles * fw_vpp_cycles) / vpp_cycles;

		vsp_cycles += max(vsp_cycles/20, sw_overhead);



		/* 21 / 20 is minimum overhead factor */

		vpp_cycles += max(vpp_cycles / 20, fw_vpp_cycles);



		/* 1.059 pipeline overhead factor */

		if (inst->clk_data.work_route > 1)

			vpp_cycles += vpp_cycles/17;

			vpp_cycles += (vpp_cycles * 14 / 1000);



	} else if (inst->session_type == MSM_VIDC_DECODER) {

		vpp_cycles = mbs_per_second * inst->clk_data.entry->vpp_cycles /

				inst->clk_data.work_route;



		vsp_cycles = mbs_per_second * inst->clk_data.entry->vsp_cycles;



		/* vsp perf is about 0.5 bits/cycle */

		vsp_cycles += ((fps * filled_len * 8) * 10) / 5;



		/* sw overhead factor */

		sw_overhead = ((u64)vsp_cycles * fw_vpp_cycles) / vpp_cycles;

		vsp_cycles += max(vsp_cycles/20, sw_overhead);



		/* 21 / 20 is minimum overhead factor */

		vpp_cycles += max(vpp_cycles / 20, fw_vpp_cycles);



		/* 1.059 pipeline overhead factor */

		if (inst->clk_data.work_route > 1)

			vpp_cycles += vpp_cycles/17;



	} else {

		dprintk(VIDC_ERR, "Unknown session type = %s\n", __func__);

		return msm_vidc_max_freq(inst->core);