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Commit 6883756a authored by Siddhartha Agrawal's avatar Siddhartha Agrawal
Browse files

msm: mdss: control when MMSS GDSC gets turned off 



RPM has no way to know if they have to disable the MMSS gdsc
during idle power collapse or if its a full suspend.
Setting up the RPM RAM msg to 1 going into idle power collapse
and setting it to 0 while going to full suspend.
All these states mentioned are from a display point of
view.

Crs-Fixed: 1068650
Change-Id: I0ed47e89f6a4dd332ff28e8a1203ae3bfe44e7fa
Signed-off-by: default avatarSiddhartha Agrawal <agrawals@codeaurora.org>
parent 9e2d528d

drivers/video/fbdev/msm/mdss.h

+1 −0
Original line number Diff line number Diff line
@@ -163,6 +163,7 @@ enum mdss_hw_quirk { 
	MDSS_QUIRK_FMT_PACK_PATTERN,

	MDSS_QUIRK_NEED_SECURE_MAP,

	MDSS_QUIRK_SRC_SPLIT_ALWAYS,

	MDSS_QUIRK_MMSS_GDSC_COLLAPSE,

	MDSS_QUIRK_MAX,

};

drivers/video/fbdev/msm/mdss_mdp.c

+30 −0
Original line number Diff line number Diff line
@@ -1831,6 +1831,20 @@ static u32 mdss_get_props(void) 
	return props;

}



static void mdss_rpm_set_msg_ram(bool enable)

{

	u32 read_reg = 0;

	void __iomem *rpm_msg_ram = ioremap(0x7781FC, 4);



	if (rpm_msg_ram) {

		writel_relaxed(enable, rpm_msg_ram);

		read_reg = readl_relaxed(rpm_msg_ram);

		pr_debug("%s enable=%d read_val=%x\n", __func__, enable,

				read_reg);

		iounmap(rpm_msg_ram);

	}

}



void mdss_mdp_init_default_prefill_factors(struct mdss_data_type *mdata)

{

	mdata->prefill_data.prefill_factors.fmt_mt_nv12_factor = 8;
@@ -1998,6 +2012,7 @@ static void mdss_mdp_hw_rev_caps_init(struct mdss_data_type *mdata) 
		mdss_mdp_init_default_prefill_factors(mdata);

		mdss_set_quirk(mdata, MDSS_QUIRK_DSC_RIGHT_ONLY_PU);

		mdss_set_quirk(mdata, MDSS_QUIRK_DSC_2SLICE_PU_THRPUT);

		mdss_set_quirk(mdata, MDSS_QUIRK_MMSS_GDSC_COLLAPSE);

		mdata->has_wb_ubwc = true;

		set_bit(MDSS_CAPS_10_BIT_SUPPORTED, mdata->mdss_caps_map);

		set_bit(MDSS_CAPS_AVR_SUPPORTED, mdata->mdss_caps_map);
@@ -4879,6 +4894,13 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on) 
			pr_debug("Disable MDP FS\n");

			active_cnt = atomic_read(&mdata->active_intf_cnt);

			if (active_cnt != 0) {

				/*

				 * Advise RPM to not turn MMSS GDSC off during

				 * idle case.

				 */

				if (mdss_has_quirk(mdata,

						MDSS_QUIRK_MMSS_GDSC_COLLAPSE))

					mdss_rpm_set_msg_ram(true);

				/*

				 * Turning off GDSC while overlays are still

				 * active.
@@ -4888,6 +4910,14 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on) 
					active_cnt);

				mdss_mdp_memory_retention_enter();

			} else {

				/*

				 * Advise RPM to turn MMSS GDSC off during

				 * suspend case

				 */

				if (mdss_has_quirk(mdata,

						MDSS_QUIRK_MMSS_GDSC_COLLAPSE))

					mdss_rpm_set_msg_ram(false);



				mdss_mdp_cx_ctrl(mdata, false);

				mdss_mdp_batfet_ctrl(mdata, false);

			}