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Commit a9dd305d authored by Benjamin Chan's avatar Benjamin Chan Committed by Alan Kwong
Browse files

msm: sde: Fix SW timestamp initialization when missing power event 



Under some cases, the PM event is missing, and rotator driver will not
initialize the SW timestamp. This change is to add rotator reset
detection logic and auto initialize the SW timestamp register if such
happened.

CRs-Fixed: 2006856
Change-Id: I8c889435e0be1518a6ec2dd6f9c7b02d140df9f1
Signed-off-by: default avatarBenjamin Chan <bkchan@codeaurora.org>
parent 0f105b40

drivers/media/platform/msm/sde/rotator/sde_rotator_r3.c

+37 −0
Original line number Diff line number Diff line
@@ -1860,6 +1860,7 @@ static int sde_hw_rotator_config(struct sde_rot_hw_resource *hw, 
	u32 danger_lut = 0;	/* applicable for realtime client only */

	u32 safe_lut = 0;	/* applicable for realtime client only */

	u32 flags = 0;

	u32 rststs = 0;

	struct sde_rotation_item *item;

	int ret;
@@ -1931,10 +1932,46 @@ static int sde_hw_rotator_config(struct sde_rot_hw_resource *hw, 


	SDEROT_EVTLOG(ctx->start_ctrl, ctx->sys_cache_mode, ctx->op_mode);



	/*

	 * if Rotator HW is reset, but missing PM event notification, we

	 * need to init the SW timestamp automatically.

	 */

	rststs = SDE_ROTREG_READ(rot->mdss_base, REGDMA_RESET_STATUS_REG);

	if (!rot->reset_hw_ts && rststs) {

		u32 l_ts, h_ts, swts;



		swts = SDE_ROTREG_READ(rot->mdss_base, REGDMA_TIMESTAMP_REG);

		h_ts = atomic_read(&rot->timestamp[ROT_QUEUE_HIGH_PRIORITY]);

		l_ts = atomic_read(&rot->timestamp[ROT_QUEUE_LOW_PRIORITY]);

		SDEROT_EVTLOG(0xbad0, rststs, swts, h_ts, l_ts);



		if (ctx->q_id == ROT_QUEUE_HIGH_PRIORITY)

			h_ts = (h_ts - 1) & SDE_REGDMA_SWTS_MASK;

		else

			l_ts = (l_ts - 1) & SDE_REGDMA_SWTS_MASK;



		/* construct the combined timstamp */

		swts = (h_ts & SDE_REGDMA_SWTS_MASK) |

			((l_ts & SDE_REGDMA_SWTS_MASK) <<

			 SDE_REGDMA_SWTS_SHIFT);



		SDEROT_DBG("swts:0x%x, h_ts:0x%x, l_ts;0x%x\n",

				swts, h_ts, l_ts);

		SDEROT_EVTLOG(0x900d, swts, h_ts, l_ts);

		rot->last_hw_ts = swts;



		SDE_ROTREG_WRITE(rot->mdss_base, REGDMA_TIMESTAMP_REG,

				rot->last_hw_ts);

		SDE_ROTREG_WRITE(rot->mdss_base, REGDMA_RESET_STATUS_REG, 0);

		/* ensure write is issued to the rotator HW */

		wmb();

	}



	if (rot->reset_hw_ts) {

		SDEROT_EVTLOG(rot->last_hw_ts);

		SDE_ROTREG_WRITE(rot->mdss_base, REGDMA_TIMESTAMP_REG,

				rot->last_hw_ts);

		SDE_ROTREG_WRITE(rot->mdss_base, REGDMA_RESET_STATUS_REG, 0);

		/* ensure write is issued to the rotator HW */

		wmb();

		rot->reset_hw_ts = false;

drivers/media/platform/msm/sde/rotator/sde_rotator_r3_hwio.h

+1 −0
Original line number Diff line number Diff line
@@ -291,5 +291,6 @@ 
#define REGDMA_INT_LOW_MASK             0x00000700

#define REGDMA_INT_ERR_MASK             0x000F0000

#define REGDMA_TIMESTAMP_REG            ROT_SSPP_TPG_PATTERN_GEN_INIT_VAL

#define REGDMA_RESET_STATUS_REG         ROT_SSPP_TPG_RGB_MAPPING



#endif /*_SDE_ROTATOR_R3_HWIO_H */