linux-kernel - [PATCH v4 17/27] drm/bridge: ti-sn65dsi86: Use pm

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Message-Id: <20210416153909.v4.17.I4c0b4a87e4dc19e5023b4d0a21bbfa6d9c09ebd8@changeid>
Date:   Fri, 16 Apr 2021 15:39:40 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Sam Ravnborg <sam@...nborg.org>, Wolfram Sang <wsa@...nel.org>
Cc:     Stephen Boyd <swboyd@...omium.org>, robdclark@...omium.org,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Stanislav Lisovskiy <stanislav.lisovskiy@...el.com>,
        Steev Klimaszewski <steev@...i.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, Linus W <linus.walleij@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Robert Foss <robert.foss@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 17/27] drm/bridge: ti-sn65dsi86: Use pm_runtime autosuspend

Let's make the bridge use autosuspend with a 500ms delay. This is in
preparation for promoting DP AUX transfers to their own sub-driver so
that we're not constantly powering up and down the device as we
transfer all the chunks.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

(no changes since v1)

 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 44edcf6f5744..a98abf496190 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -243,7 +243,7 @@ static int status_show(struct seq_file *s, void *data)
 		seq_printf(s, "[0x%02x] = 0x%08x\n", reg, val);
 	}
 
-	pm_runtime_put(pdata->dev);
+	pm_runtime_put_autosuspend(pdata->dev);
 
 	return 0;
 }
@@ -292,7 +292,7 @@ static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector)
 	if (!edid) {
 		pm_runtime_get_sync(pdata->dev);
 		edid = pdata->edid = drm_get_edid(connector, &pdata->aux.ddc);
-		pm_runtime_put(pdata->dev);
+		pm_runtime_put_autosuspend(pdata->dev);
 	}
 
 	if (edid && drm_edid_is_valid(edid)) {
@@ -418,7 +418,7 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	/* check if continuous dsi clock is required or not */
 	pm_runtime_get_sync(pdata->dev);
 	regmap_read(pdata->regmap, SN_DPPLL_SRC_REG, &val);
-	pm_runtime_put(pdata->dev);
+	pm_runtime_put_autosuspend(pdata->dev);
 	if (!(val & DPPLL_CLK_SRC_DSICLK))
 		dsi->mode_flags |= MIPI_DSI_CLOCK_NON_CONTINUOUS;
 
@@ -1049,7 +1049,7 @@ static int ti_sn_bridge_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	 */
 	pm_runtime_get_sync(pdata->dev);
 	ret = regmap_read(pdata->regmap, SN_GPIO_IO_REG, &val);
-	pm_runtime_put(pdata->dev);
+	pm_runtime_put_autosuspend(pdata->dev);
 
 	if (ret)
 		return ret;
@@ -1100,7 +1100,7 @@ static int ti_sn_bridge_gpio_direction_input(struct gpio_chip *chip,
 	 * it off and when it comes back it will have lost all state, but
 	 * that's OK because the default is input and we're now an input.
 	 */
-	pm_runtime_put(pdata->dev);
+	pm_runtime_put_autosuspend(pdata->dev);
 
 	return 0;
 }
@@ -1126,7 +1126,7 @@ static int ti_sn_bridge_gpio_direction_output(struct gpio_chip *chip,
 				 SN_GPIO_MUX_OUTPUT << shift);
 	if (ret) {
 		clear_bit(offset, pdata->gchip_output);
-		pm_runtime_put(pdata->dev);
+		pm_runtime_put_autosuspend(pdata->dev);
 	}
 
 	return ret;
@@ -1408,6 +1408,8 @@ static int ti_sn65dsi86_probe(struct i2c_client *client,
 	ret = devm_add_action_or_reset(dev, ti_sn65dsi86_runtime_disable, dev);
 	if (ret)
 		return ret;
+	pm_runtime_set_autosuspend_delay(pdata->dev, 500);
+	pm_runtime_use_autosuspend(pdata->dev);
 
 	ti_sn65dsi86_debugfs_init(pdata);
 
-- 
2.31.1.368.gbe11c130af-goog