msm_fb: display: change mdp clock while mdp is idle
Mdp clock need to be adjusted at run time base on the
performance level. However mdp clock can only be changed
when mdp blending/dma engine is idle.
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
diff --git a/drivers/video/msm/mdp4_overlay.c b/drivers/video/msm/mdp4_overlay.c
index 954f9f9..e8d6eef 100644
--- a/drivers/video/msm/mdp4_overlay.c
+++ b/drivers/video/msm/mdp4_overlay.c
@@ -98,7 +98,7 @@
};
static struct mdp4_overlay_ctrl *ctrl = &mdp4_overlay_db;
-static uint32 perf_level;
+static uint32 new_perf_level;
static uint32 mdp4_del_res_rel;
/* static array with index 0 for unset status and 1 for set status */
static bool overlay_status[MDP4_OVERLAY_TYPE_MAX];
@@ -1873,10 +1873,20 @@
return OVERLAY_PERF_LEVEL1;
}
+void mdp4_set_perf_level(void)
+{
+ static int old_perf_level;
+
+ if (old_perf_level != new_perf_level) {
+ mdp_set_core_clk(new_perf_level);
+ old_perf_level = new_perf_level;
+ }
+}
+
int mdp4_overlay_set(struct fb_info *info, struct mdp_overlay *req)
{
struct msm_fb_data_type *mfd = (struct msm_fb_data_type *)info->par;
- int ret, mixer;
+ int ret, mixer, perf_level;
struct mdp4_overlay_pipe *pipe;
if (mfd == NULL) {
@@ -1964,7 +1974,8 @@
mdp4_del_res_rel = 0;
mutex_unlock(&mfd->dma->ov_mutex);
- mdp_set_core_clk(perf_level);
+
+ new_perf_level = perf_level;
#ifdef CONFIG_MSM_BUS_SCALING
if (pipe->mixer_num == MDP4_MIXER0) {
@@ -1976,14 +1987,6 @@
return 0;
}
-void mdp4_overlay_resource_release(void)
-{
- if (mdp4_del_res_rel) {
- mdp_set_core_clk(OVERLAY_PERF_LEVEL4);
- mdp4_del_res_rel = 0;
- }
-}
-
int mdp4_overlay_unset(struct fb_info *info, int ndx)
{
struct msm_fb_data_type *mfd = (struct msm_fb_data_type *)info->par;
@@ -2069,7 +2072,7 @@
if (!(ctrl->ov_pipe[OVERLAY_PIPE_VG1].ref_cnt +
ctrl->ov_pipe[OVERLAY_PIPE_VG2].ref_cnt))
- mdp4_del_res_rel = 1;
+ new_perf_level = OVERLAY_PERF_LEVEL4;
mutex_unlock(&mfd->dma->ov_mutex);