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msm: mdss: add handoff support for multiple pipes on same mixer stage

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In the existing implementation, display driver assumes only one pipe
can be staged on a layer mixer during overlay handoff. Starting from
MDSS v1.03, layer mixer can support two pipes staged at the same stage.
This change handles the case for two pipes on layer mixer at same
staging level. If more than two pipes are staged on a layer mixer, it
is invalid.

Change-Id: Ie6fa42e7a5b555de53fc4a3801e89447c3b1f90f
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>
This commit is contained in:
Jeevan Shriram 2015-01-08 13:50:04 -08:00 • committed by David Keitel
parent 90ded5a0d9
commit dd85a8543e
1 changed files with 21 additions and 5 deletions
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26
drivers/video/fbdev/msm/mdss_mdp_ctl.c
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@ -3861,22 +3861,38 @@ static int __mdss_mdp_mixer_handoff_helper(struct mdss_mdp_mixer *mixer,
struct mdss_mdp_pipe *pipe)
{
int rc = 0;
struct mdss_data_type *mdata = mdss_mdp_get_mdata();
u32 right_blend = 0;
if (!mixer) {
rc = -EINVAL;
goto error;
}
/*
* It is possible to have more the one pipe staged on a single
* layer mixer at same staging level.
*/
if (mixer->stage_pipe[MDSS_MDP_STAGE_UNUSED] != NULL) {
pr_err("More than one pipe staged on mixer num %d\n",
mixer->num);
rc = -EINVAL;
goto error;
if (mdata->mdp_rev < MDSS_MDP_HW_REV_103) {
pr_err("More than one pipe staged on mixer num %d\n",
mixer->num);
rc = -EINVAL;
goto error;
} else if (mixer->stage_pipe[MDSS_MDP_STAGE_UNUSED + 1] !=
NULL) {
pr_err("More than two pipe staged on mixer num %d\n",
mixer->num);
rc = -EINVAL;
goto error;
} else {
right_blend = 1;
}
}
pr_debug("Staging pipe num %d on mixer num %d\n",
pipe->num, mixer->num);
mixer->stage_pipe[MDSS_MDP_STAGE_UNUSED] = pipe;
mixer->stage_pipe[MDSS_MDP_STAGE_UNUSED + right_blend] = pipe;
pipe->mixer_left = mixer;
pipe->mixer_stage = MDSS_MDP_STAGE_UNUSED;