Merge "msm: mdss: reduce mdp bandwidth for single pipe use case" (ebb106df) · Commits · e / devices / android_kernel_sony_msm8994

drivers/video/msm/mdss/mdss_mdp_ctl.c

+76 −7

Original line number	Diff line number	Diff line
		@@ -86,6 +86,7 @@ struct mdss_mdp_prefill_params {
		bool is_bwc;
		bool is_tile;
		bool is_hflip;
		bool is_cmd;
		};

		static inline bool mdss_mdp_perf_is_caf(struct mdss_mdp_pipe *pipe)
		@@ -291,6 +292,66 @@ static u32 mdss_mdp_perf_calc_pipe_prefill_cmd(struct mdss_mdp_prefill_params
		return prefill_bytes;
		}

		u32 mdss_mdp_perf_calc_pipe_prefill_single(struct mdss_mdp_prefill_params
		*params)
		{
		struct mdss_data_type *mdata = mdss_mdp_get_mdata();
		struct mdss_prefill_data *prefill = &mdata->prefill_data;
		u32 prefill_bytes;
		u32 latency_lines, latency_buf_bytes;
		u32 y_scaler_bytes;
		u32 fbc_cmd_lines = 0, fbc_cmd_bytes = 0;

		if (params->is_bwc \|\| params->is_tile)
		/* can start processing after receiving 4 lines */
		latency_lines = 4;
		else if (!params->is_caf && params->is_hflip)
		/* need oneline before reading backwards */
		latency_lines = 1;
		else
		latency_lines = 0;
		latency_buf_bytes = params->src_w * params->bpp * latency_lines;
		prefill_bytes = latency_buf_bytes;

		y_scaler_bytes = mdss_mdp_calc_y_scaler_bytes(params, prefill);
		prefill_bytes += y_scaler_bytes;

		if (params->is_cmd)
		fbc_cmd_lines++;
		if (params->is_fbc)
		fbc_cmd_lines++;

		if (fbc_cmd_lines) {
		fbc_cmd_bytes = params->bpp * params->dst_w * fbc_cmd_lines;
		fbc_cmd_bytes = mdss_mdp_calc_scaling_w_h(fbc_cmd_bytes,
		params->src_h, params->dst_h, params->src_w,
		params->dst_w);
		prefill_bytes += fbc_cmd_bytes;
		}

		return prefill_bytes;
		}

		static inline bool mdss_mdp_is_single_pipe_per_mixer(
		struct mdss_mdp_mixer *mixer)
		{
		bool is_single = true;
		int cnt = 0;
		int i;

		for (i = 0; i < MDSS_MDP_MAX_STAGE; i++) {
		struct mdss_mdp_pipe *pipe = mixer->stage_pipe[i];
		if (pipe) {
		cnt++;
		if (cnt > 1) {
		is_single = false;
		break;
		}
		}
		}
		return is_single;
		}

		/**
		* mdss_mdp_perf_calc_pipe() - calculate performance numbers required by pipe
		* @pipe: Source pipe struct containing updated pipe params
		@@ -389,6 +450,11 @@ int mdss_mdp_perf_calc_pipe(struct mdss_mdp_pipe *pipe,
		else
		perf->mdp_clk_rate = rate;

		if (mixer->ctl->intf_num == MDSS_MDP_NO_INTF) {
		perf->prefill_bytes = 0;
		return 0;
		}

		prefill_params.smp_bytes = mdss_mdp_smp_get_size(pipe);
		prefill_params.xres = xres;
		prefill_params.src_w = src.w;
		@@ -403,14 +469,17 @@ int mdss_mdp_perf_calc_pipe(struct mdss_mdp_pipe *pipe,
		prefill_params.is_bwc = pipe->bwc_mode;
		prefill_params.is_tile = pipe->src_fmt->tile;
		prefill_params.is_hflip = pipe->flags & MDP_FLIP_LR;

		if (mixer->type == MDSS_MDP_MIXER_TYPE_INTF) {
		perf->prefill_bytes = (mixer->ctl->is_video_mode) ?
		mdss_mdp_perf_calc_pipe_prefill_video(&prefill_params) :
		mdss_mdp_perf_calc_pipe_prefill_cmd(&prefill_params);
		}
		prefill_params.is_cmd = !mixer->ctl->is_video_mode;

		if (mdss_mdp_is_single_pipe_per_mixer(mixer))
		perf->prefill_bytes =
		mdss_mdp_perf_calc_pipe_prefill_single(&prefill_params);
		else if (!prefill_params.is_cmd)
		perf->prefill_bytes =
		mdss_mdp_perf_calc_pipe_prefill_video(&prefill_params);
		else
		perf->prefill_bytes = 0;
		perf->prefill_bytes =
		mdss_mdp_perf_calc_pipe_prefill_cmd(&prefill_params);

		pr_debug("mixer=%d pnum=%d clk_rate=%u bw_overlap=%llu prefill=%d\n",
		mixer->num, pipe->num, perf->mdp_clk_rate, perf->bw_overlap,