evie/android_kernel_oneplus_msm8998
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msm: mdss: check lab/ibb regulator before enable

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Make sure the LAB/IBB regulators are available
before start using them. In addition, fix the
regulator_disable error return path.

CRs-Fixed: 778471
Change-Id: I0a8c3b1f7f13c2699ad58b9c8302c992d076b89d
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
This commit is contained in:
Kuogee Hsieh 2014-12-19 13:06:02 -08:00 • committed by David Keitel
parent ec30c547ec
commit e43e3b4bca
1 changed files with 19 additions and 7 deletions
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26
drivers/video/fbdev/msm/mdss_dsi.c
View file

@ -53,12 +53,15 @@ static int mdss_dsi_labibb_vreg_init(struct platform_device *pdev)
ctrl->lab = regulator_get(&pdev->dev, "lab_reg");
rc = PTR_RET(ctrl->lab);
if (rc) {
ctrl->lab = NULL;
pr_err("%s: lab_regi get failed.\n", __func__);
return rc;
}
ctrl->ibb = regulator_get(&pdev->dev, "ibb_reg");
rc = PTR_RET(ctrl->ibb);
if (rc) {
ctrl->lab = NULL;
ctrl->ibb = NULL;
pr_err("%s: ibb_regi get failed.\n", __func__);
regulator_put(ctrl->lab);
return rc;
@ -75,7 +78,7 @@ static int mdss_dsi_labibb_vreg_ctrl(struct mdss_dsi_ctrl_pdata *ctrl,
{
int rc;
if (!ctrl->panel_bias_vreg)
if (!ctrl->panel_bias_vreg || !ctrl->lab || !ctrl->ibb)
return -EINVAL;
pr_debug("%s: ndx=%d enable=%d\n", __func__, ctrl->ndx, enable);
@ -83,23 +86,32 @@ static int mdss_dsi_labibb_vreg_ctrl(struct mdss_dsi_ctrl_pdata *ctrl,
if (enable) {
rc = regulator_enable(ctrl->lab);
if (rc) {
pr_err("%s: falied at lab\n", __func__);
pr_err("%s: enable failed for lab regulator\n",
__func__);
return rc;
}
rc = regulator_enable(ctrl->ibb);
if (rc) {
pr_err("%s: falied at ibb\n", __func__);
pr_err("%s: enable failed for ibb regulator\n",
__func__);
regulator_disable(ctrl->lab);
return rc;
}
} else {
rc = regulator_disable(ctrl->lab);
if (rc)
pr_err("%s: falied at lab\n", __func__);
if (rc) {
pr_err("%s: disable failed for lab regulator\n",
__func__);
return rc;
}
rc = regulator_disable(ctrl->ibb);
if (rc)
pr_err("%s: falied at ibb\n", __func__);
if (rc) {
pr_err("%s: disable failed for ibb regulator\n",
__func__);
return rc;
}
}
return 0;