From: Marek Szyprowski <m.szyprowski@samsung.com>
To: dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: [PATCH] drm: exynos: Add runtime PM support to MIC driver
Date: Tue, 10 Jan 2017 13:57:47 +0100 [thread overview]
Message-ID: <1484053067-31665-1-git-send-email-m.szyprowski@samsung.com> (raw)
In-Reply-To: CGME20170110125756eucas1p1d9fe25f1ca7e0e982abaf2d71a607f0d@eucas1p1.samsung.com
This patch adds pm_runtime_get/put calls to notify device core when MIC
device is really in use. This is needed to let power domain with this
device to be turned off when display is turned off.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_mic.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index a0def0be6d65..f643c380cb9a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -19,6 +19,7 @@
#include <linux/of_graph.h>
#include <linux/clk.h>
#include <linux/component.h>
+#include <linux/pm_runtime.h>
#include <drm/drmP.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
@@ -323,6 +324,7 @@ static void mic_post_disable(struct drm_bridge *bridge)
for (i = NUM_CLKS - 1; i > -1; i--)
clk_disable_unprepare(mic->clks[i]);
+ pm_runtime_put(mic->dev);
mic->enabled = 0;
already_disabled:
@@ -338,6 +340,8 @@ static void mic_pre_enable(struct drm_bridge *bridge)
if (mic->enabled)
goto already_enabled;
+ pm_runtime_get_sync(mic->dev);
+
for (i = 0; i < NUM_CLKS; i++) {
ret = clk_prepare_enable(mic->clks[i]);
if (ret < 0) {
@@ -473,8 +477,18 @@ static int exynos_mic_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mic);
+ pm_runtime_enable(dev);
+
+ ret = component_add(dev, &exynos_mic_component_ops);
+ if (ret)
+ goto err_pm;
+
DRM_DEBUG_KMS("MIC has been probed\n");
- return component_add(dev, &exynos_mic_component_ops);
+
+ return 0;
+
+err_pm:
+ pm_runtime_disable(dev);
err:
return ret;
@@ -483,6 +497,7 @@ static int exynos_mic_probe(struct platform_device *pdev)
static int exynos_mic_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &exynos_mic_component_ops);
+ pm_runtime_disable(&pdev->dev);
return 0;
}
--
1.9.1
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next parent reply other threads:[~2017-01-10 12:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20170110125756eucas1p1d9fe25f1ca7e0e982abaf2d71a607f0d@eucas1p1.samsung.com>
2017-01-10 12:57 ` Marek Szyprowski [this message]
2017-01-11 1:39 ` [PATCH] drm: exynos: Add runtime PM support to MIC driver Chanwoo Choi
2017-01-11 5:44 ` Inki Dae
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