linux-kernel - [PATCH] drm: msm: dsi: Don't attempt changing voltage of switches

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1439919272-19793-1-git-send-email-bjorn.andersson@sonymobile.com>
Date:	Tue, 18 Aug 2015 10:34:32 -0700
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Rob Clark <robdclark@...il.com>, Hai Li <hali@...eaurora.org>
CC:	Archit Taneja <architt@...eaurora.org>,
	Stephane Viau <sviau@...eaurora.org>,
	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm: msm: dsi: Don't attempt changing voltage of switches

In some configurations the supplies are voltage switches and not LDOs,
making the set voltage call to fail. Check with the regulator framework
if the supply can change voltage before attempting.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c    | 2 +-
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 8c16d6a3ca78..ece3de6a8157 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -278,7 +278,7 @@ static int dsi_regulator_init(struct msm_dsi_host *msm_host)
 	}
 
 	for (i = 0; i < num; i++) {
-		if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) {
+		if (regulator_can_change_voltage(s[i].consumer)) {
 			ret = regulator_set_voltage(s[i].consumer,
 				regs[i].min_voltage, regs[i].max_voltage);
 			if (ret < 0) {
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index 401ff58d6893..f1f955f571fa 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -178,7 +178,7 @@ static int dsi_phy_regulator_init(struct msm_dsi_phy *phy)
 	}
 
 	for (i = 0; i < num; i++) {
-		if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) {
+		if (regulator_can_change_voltage(s[i].consumer)) {
 			ret = regulator_set_voltage(s[i].consumer,
 				regs[i].min_voltage, regs[i].max_voltage);
 			if (ret < 0) {
-- 
1.8.2.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/