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Commit 12ef091c authored by Amir Levy's avatar Amir Levy Committed by Gerrit - the friendly Code Review server
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msm: ipa3: enable DCD (dynamic clock division) 



enable DCD in GCC during IPA's idle time as described in the
HPG for IPA versions 3.5 and above.

Change-Id: I62f76228f6d5d76b80caf91c3319760cd3d00941
CRs-Fixed: 1057491
Signed-off-by: default avatarAmir Levy <alevy@codeaurora.org>
parent 0f97a5cd

drivers/platform/msm/ipa/ipa_v3/ipa.c

+3 −0
Original line number Diff line number Diff line
@@ -4616,6 +4616,9 @@ static int ipa3_pre_init(const struct ipa3_plat_drv_res *resource_p, 
		IPADBG("Initialization of ipa interrupts skipped\n");

	}



	if (ipa3_ctx->ipa_hw_type >= IPA_HW_v3_5)

		ipa3_enable_dcd();



	INIT_LIST_HEAD(&ipa3_ctx->ipa_ready_cb_list);



	init_completion(&ipa3_ctx->init_completion_obj);

drivers/platform/msm/ipa/ipa_v3/ipa_i.h

+1 −0
Original line number Diff line number Diff line
@@ -2031,4 +2031,5 @@ int ipa3_get_ntn_stats(struct Ipa3HwStatsNTNInfoData_t *stats); 
struct dentry *ipa_debugfs_get_root(void);

bool ipa3_is_msm_device(void);

struct device *ipa3_get_pdev(void);

void ipa3_enable_dcd(void);

#endif /* _IPA3_I_H_ */

drivers/platform/msm/ipa/ipa_v3/ipa_utils.c

+18 −0
Original line number Diff line number Diff line
@@ -4069,3 +4069,21 @@ struct device *ipa3_get_pdev(void) 


	return ipa3_ctx->pdev;

}



/**

 * ipa3_enable_dcd() - enable dynamic clock division on IPA

 *

 * Return value: Non applicable

 *

 */

void ipa3_enable_dcd(void)

{

	struct ipahal_reg_idle_indication_cfg idle_indication_cfg;



	/* recommended values for IPA 3.5 according to IPA HPG */

	idle_indication_cfg.const_non_idle_enable = 0;

	idle_indication_cfg.enter_idle_debounce_thresh = 256;



	ipahal_write_reg_fields(IPA_IDLE_INDICATION_CFG,

			&idle_indication_cfg);

}

drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.c

+21 −0
Original line number Diff line number Diff line
@@ -909,6 +909,24 @@ static void ipareg_construct_tx_cfg(enum ipahal_reg_name reg, 
		IPA_TX_CFG_PREFETCH_ALMOST_EMPTY_SIZE_BMSK_V3_5);

}



static void ipareg_construct_idle_indication_cfg(enum ipahal_reg_name reg,

	const void *fields, u32 *val)

{

	struct ipahal_reg_idle_indication_cfg *idle_indication_cfg;



	idle_indication_cfg = (struct ipahal_reg_idle_indication_cfg *)fields;



	IPA_SETFIELD_IN_REG(*val,

		idle_indication_cfg->enter_idle_debounce_thresh,

		IPA_IDLE_INDICATION_CFG_ENTER_IDLE_DEBOUNCE_THRESH_SHFT_V3_5,

		IPA_IDLE_INDICATION_CFG_ENTER_IDLE_DEBOUNCE_THRESH_BMSK_V3_5);



	IPA_SETFIELD_IN_REG(*val,

		idle_indication_cfg->const_non_idle_enable,

		IPA_IDLE_INDICATION_CFG_CONST_NON_IDLE_ENABLE_SHFT_V3_5,

		IPA_IDLE_INDICATION_CFG_CONST_NON_IDLE_ENABLE_BMSK_V3_5);

}



/*

 * struct ipahal_reg_obj - Register H/W information for specific IPA version

 * @construct - CB to construct register value from abstracted structure
@@ -1185,6 +1203,9 @@ static struct ipahal_reg_obj ipahal_reg_objs[IPA_HW_MAX][IPA_REG_MAX] = { 
	[IPA_HW_v3_5][IPA_SPARE_REG_2] = {

		ipareg_construct_dummy, ipareg_parse_dummy,

		0x00002784, 0},

	[IPA_HW_v3_5][IPA_IDLE_INDICATION_CFG] = {

		ipareg_construct_idle_indication_cfg, ipareg_parse_dummy,

		0x00000220, 0},

};



/*

drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.h

+11 −0
Original line number Diff line number Diff line
@@ -83,6 +83,7 @@ enum ipahal_reg_name { 
	IPA_QSB_MAX_WRITES,

	IPA_QSB_MAX_READS,

	IPA_TX_CFG,

	IPA_IDLE_INDICATION_CFG,

	IPA_REG_MAX,

};
@@ -329,6 +330,16 @@ struct ipahal_reg_tx_cfg { 
	u16 prefetch_almost_empty_size;

};



/*

 * struct ipahal_reg_idle_indication_cfg - IPA IDLE_INDICATION_CFG register

 * @const_non_idle_enable: enable the asserting of the IDLE value and DCD

 * @enter_idle_debounce_thresh:  configure the debounce threshold

 */

struct ipahal_reg_idle_indication_cfg {

	u16 enter_idle_debounce_thresh;

	bool const_non_idle_enable;

};



/*

 * ipahal_reg_name_str() - returns string that represent the register

 * @reg_name: [in] register name