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Commit 714b07ea authored by Tingwei Zhang's avatar Tingwei Zhang
Browse files

soc: qcom: dcc_v2: Add dynamic loop offset support 



Loop offset of DCC is dynamic according to DCC SRAM size.
Add support to change loop offset according to SRAM size.

Change-Id: I1b0a992fc421ae05f091afe37919edb2ce32a1e1
Signed-off-by: default avatarTingwei Zhang <tingwei@codeaurora.org>
parent c7e62f77

drivers/soc/qcom/dcc_v2.c

+6 −4
Original line number Diff line number Diff line 
/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.

/* Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -149,6 +149,7 @@ struct dcc_drvdata { 
	uint32_t		nr_config[DCC_MAX_LINK_LIST];

	uint8_t			curr_list;

	uint8_t			cti_trig;

	uint8_t			loopoff;

};



static int dcc_sram_writel(struct dcc_drvdata *drvdata,
@@ -271,7 +272,6 @@ static int __dcc_ll_cfg(struct dcc_drvdata *drvdata, int curr_list) 
				/* write new offset = 1 to continue

				 * processing the list

				 */

				link |= ((0x1 << 8) & BM(8, 14));

				ret = dcc_sram_writel(drvdata,

							link, sram_offset);

				if (ret)
@@ -318,7 +318,8 @@ static int __dcc_ll_cfg(struct dcc_drvdata *drvdata, int curr_list) 


			if (loop_start) {

				loop = (sram_offset - loop_off) / 4;

				loop |= (loop_cnt << 13) & BM(13, 27);

				loop |= (loop_cnt << drvdata->loopoff) &

					BM(drvdata->loopoff, 27);

				loop |= DCC_LOOP_DESCRIPTOR;

				total_len += (total_len - loop_len) * loop_cnt;
@@ -353,7 +354,6 @@ static int __dcc_ll_cfg(struct dcc_drvdata *drvdata, int curr_list) 
				/* write new offset = 1 to continue

				 * processing the list

				 */

				link |= ((0x1 << 8) & BM(8, 14));

				ret = dcc_sram_writel(drvdata,

						link, sram_offset);

				if (ret)
@@ -1694,6 +1694,8 @@ static int dcc_probe(struct platform_device *pdev) 
	if (ret)

		return -EINVAL;



	drvdata->loopoff = get_bitmask_order((drvdata->ram_size +

				drvdata->ram_offset) / 4 - 1);

	mutex_init(&drvdata->mutex);



	for (i = 0; i < DCC_MAX_LINK_LIST; i++) {