Merge "msm: vidc: Force vmem_maxi_clk to certain frequencies for 4K sessions" (5e67779d) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/media/platform/msm/vidc/governors/msm_vidc_bw_gov.c

+25 −1

Original line number	Diff line number	Diff line
		@@ -49,6 +49,15 @@ const struct {
		.height = 720,
		};

		/*
		* These are hardcoded AB values that the governor votes for in certain
		* situations, where a certain bus frequency is desired. It isn't exactly
		* scalable since different platforms have different bus widths, but we'll
		* deal with that in the future.
		*/
		const unsigned long NOMINAL_BW_MBPS = 6000 /* ideally 320 Mhz */,
		SVS_BW_MBPS = 2000 /* ideally 100 Mhz */;

		/* converts Mbps to bps (the "b" part can be bits or bytes based on context) */
		#define kbps(__mbps) ((__mbps) * U64_C(1000))
		#define bps(__mbps) (kbps(__mbps) * U64_C(1000))
		@@ -434,6 +443,14 @@ static unsigned long __calculate_decoder(struct vidc_bus_vote_data *d,
		vmem.opb_read + vmem.opb_write +
		vmem.dpb_read + vmem.dpb_write;

		/*
		* Attempt to force VMEM to a certain frequency for 4K
		*/
		if (width * height * fps >= 3840 * 2160 * 60)
		vmem.total = FP_INT(NOMINAL_BW_MBPS);
		else if (width * height * fps >= 3840 * 2160 * 30)
		vmem.total = FP_INT(SVS_BW_MBPS);

		/* ........................................ for DDR */
		ddr.vsp_read = fp_div(fp_mult(FP_INT(bitrate),
		vsp_read_factor), FP_INT(8));
		@@ -849,6 +866,13 @@ static unsigned long __calculate_encoder(struct vidc_bus_vote_data *d,
		vmem.original_read + vmem.original_write +
		vmem.dpb_read + vmem.dpb_write;

		/*
		* When in low power mode, attempt to force the VMEM clocks a certain
		* frequency that DCVS would prefer
		*/
		if (width * height >= 3840 * 2160 && low_power)
		vmem.total = FP_INT(NOMINAL_BW_MBPS);

		if (debug) {
		struct dump dump[] = {
		{"ENCODER PARAMETERS", "", DUMP_HEADER_MAGIC},
		@@ -980,7 +1004,7 @@ static int __get_target_freq(struct devfreq dev, unsigned long freq,
		for (c = 0; c < vidc_data->data_count; ++c)
		ab_kbps += __calculate(&vidc_data->data[c], gov->mode);

		*freq = ab_kbps;
		*freq = clamp(ab_kbps, dev->min_freq, dev->max_freq ?: UINT_MAX);
		exit:
		return 0;
		}