mdss: Add MDP_SMP_FORCE_ALLOC mdp flag

MDP_SMP_FORCE_ALLOC flag is used to allow SMP allocations even when there is mismatch between allocated and requested SMPs for a pipe. User space can make use of this flag in extreme scenarios where SMP allocations need to pass like GPU composition and playback of protected or secure videos. Change-Id: I369b4361e7e2bbfc8150add467678c4ef8d5cfb6 Signed-off-by: Justin Philip <[email protected]>
android-legacy · Feb 19, 2015 · e776111 · e776111
1 parent 793dc4a
commit e776111
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Showing 2 changed files with 3 additions and 7 deletions.
diff --git a/drivers/video/msm/mdss/mdss_mdp_pipe.c b/drivers/video/msm/mdss/mdss_mdp_pipe.c
@@ -334,13 +334,8 @@ int mdss_mdp_smp_reserve(struct mdss_mdp_pipe *pipe)
 	if (pipe->mixer_left->type == MDSS_MDP_MIXER_TYPE_WRITEBACK)
 		wb_mixer = 1;
 
-	/*
-	 * Don't want to allow SMP changes for backend composition pipes
-	 * inorder to preserve SMPs as much as possible.
-	 * On the contrary for non backend composition pipes we should
-	 * allow SMP allocations to prevent composition failures.
-	 */
-	force_alloc = !(pipe->flags & MDP_BACKEND_COMPOSITION);
+	force_alloc = pipe->flags & MDP_SMP_FORCE_ALLOC;
+
 	mutex_lock(&mdss_mdp_smp_lock);
 	if (!is_unused_smp_allowed()) {
 		for (i = (MAX_PLANES - 1); i >= ps.num_planes; i--) {

diff --git a/include/uapi/linux/msm_mdp.h b/include/uapi/linux/msm_mdp.h
@@ -216,6 +216,7 @@ enum {
 #define MDP_MEMORY_ID_TYPE_FB		0x00001000
 #define MDP_BWC_EN			0x00000400
 #define MDP_DECIMATION_EN		0x00000800
+#define MDP_SMP_FORCE_ALLOC		0x00200000
 #define MDP_TRANSP_NOP 0xffffffff
 #define MDP_ALPHA_NOP 0xff