Merge "msm: mdss: Add support to retain AD RAMs" (cb944be0) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/video/msm/mdss/mdss_mdp.c

+39 −0

Original line number	Diff line number	Diff line
		@@ -861,6 +861,36 @@ int mdss_iommu_ctrl(int enable)
		return mdata->iommu_ref_cnt;
		}

		static void mdss_mdp_memory_retention_enter(void)
		{
		struct clk *mdss_mdp_clk = NULL;
		struct clk *mdp_vote_clk = mdss_mdp_get_clk(MDSS_CLK_MDP_CORE);

		if (mdp_vote_clk) {
		mdss_mdp_clk = clk_get_parent(mdp_vote_clk);
		if (mdss_mdp_clk) {
		clk_set_flags(mdss_mdp_clk, CLKFLAG_RETAIN_MEM);
		clk_set_flags(mdss_mdp_clk, CLKFLAG_PERIPH_OFF_SET);
		clk_set_flags(mdss_mdp_clk, CLKFLAG_NORETAIN_PERIPH);
		}
		}
		}

		static void mdss_mdp_memory_retention_exit(void)
		{
		struct clk *mdss_mdp_clk = NULL;
		struct clk *mdp_vote_clk = mdss_mdp_get_clk(MDSS_CLK_MDP_CORE);

		if (mdp_vote_clk) {
		mdss_mdp_clk = clk_get_parent(mdp_vote_clk);
		if (mdss_mdp_clk) {
		clk_set_flags(mdss_mdp_clk, CLKFLAG_RETAIN_MEM);
		clk_set_flags(mdss_mdp_clk, CLKFLAG_RETAIN_PERIPH);
		clk_set_flags(mdss_mdp_clk, CLKFLAG_PERIPH_OFF_CLEAR);
		}
		}
		}

		/**
		* mdss_mdp_idle_pc_restore() - Restore MDSS settings when exiting idle pc
		*
		@@ -888,6 +918,14 @@ static int mdss_mdp_idle_pc_restore(void)
		}
		mdss_hw_init(mdata);
		mdss_iommu_ctrl(0);

		/**
		* sleep 10 microseconds to make sure AD auto-reinitialization
		* is done
		*/
		udelay(10);
		mdss_mdp_memory_retention_exit();

		mdss_mdp_ctl_restore(true);
		mdata->idle_pc = false;

		@@ -4065,6 +4103,7 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on)
		mdata->idle_pc = true;
		pr_debug("idle pc. active overlays=%d\n",
		active_cnt);
		mdss_mdp_memory_retention_enter();
		} else {
		mdss_mdp_cx_ctrl(mdata, false);
		mdss_mdp_batfet_ctrl(mdata, false);