evie/android_kernel_oneplus_msm8998
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msm: mdss: skip bw vote for same bw requests

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If the bandwidth requested is the same as the
one from the previous vote, skip the call to
bus driver in order to avoid an overhead
due unnecessary calls to bus driver.

Change-Id: I5e90f04a186d9d259e28c70783840294c86fcc98
Signed-off-by: Ingrid Gallardo <ingridg@codeaurora.org>
(cherry picked from commit 7337a9e3df25b2ce22005001d95866a51738429b )
[veeras@codeaurora.org: Resolve merge conflict in mdss_dsi_host.c]
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
This commit is contained in:
Ingrid Gallardo 2015-02-12 20:24:26 -08:00 • committed by David Keitel
parent 40064f21be
commit 059322e52a
2 changed files with 16 additions and 1 deletions
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2
drivers/video/fbdev/msm/mdss_dsi_host.c
View file

@ -2024,7 +2024,7 @@ int mdss_dsi_cmdlist_commit(struct mdss_dsi_ctrl_pdata *ctrl, int from_mdp)
ctrl->mdss_util->bus_bandwidth_ctrl(1);
if (ctrl->mdss_util->bus_scale_set_quota)
ctrl->mdss_util->bus_scale_set_quota(MDSS_DSI_RT, SZ_1M, SZ_1M);
ctrl->mdss_util->bus_scale_set_quota(MDSS_DSI_RT, 0, SZ_1M);
pr_debug("%s: from_mdp=%d pid=%d\n", __func__, from_mdp, current->pid);

15
drivers/video/fbdev/msm/mdss_mdp.c
View file

@ -317,6 +317,7 @@ static int mdss_mdp_bus_scale_set_quota(u64 ab_quota_rt, u64 ab_quota_nrt,
u32 nrt_axi_port_cnt = mdss_res->nrt_axi_port_cnt;
u32 total_axi_port_cnt = mdss_res->axi_port_cnt;
u32 rt_axi_port_cnt = total_axi_port_cnt - nrt_axi_port_cnt;
int match_cnt = 0;
if (!bw_table || !total_axi_port_cnt ||
total_axi_port_cnt > MAX_AXI_PORT_COUNT) {
@ -357,6 +358,20 @@ static int mdss_mdp_bus_scale_set_quota(u64 ab_quota_rt, u64 ab_quota_nrt,
}
}
for (i = 0; i < total_axi_port_cnt; i++) {
vect = &bw_table->usecase
[mdss_res->curr_bw_uc_idx].vectors[i];
/* avoid performing updates for small changes */
if ((ab_quota[i] == vect->ab) &&
(ib_quota[i] == vect->ib))
match_cnt++;
}
if (match_cnt == total_axi_port_cnt) {
pr_debug("skip BW vote\n");
return 0;
}
new_uc_idx = (mdss_res->curr_bw_uc_idx %
(bw_table->num_usecases - 1)) + 1;