diff options
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_mdp.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/video/fbdev/msm/mdss_mdp.c b/drivers/video/fbdev/msm/mdss_mdp.c index 9d6d48d28846..64e2094e4085 100644 --- a/drivers/video/fbdev/msm/mdss_mdp.c +++ b/drivers/video/fbdev/msm/mdss_mdp.c @@ -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; @@ -4057,6 +4095,7 @@ 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); |