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Message-ID: <20240804061503.881283-3-kikuchan98@gmail.com>
Date: Sun, 4 Aug 2024 15:14:46 +0900
From: Hironori KIKUCHI <kikuchan98@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Hironori KIKUCHI <kikuchan98@...il.com>,
Jagan Teki <jagan@...rulasolutions.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Jessica Zhang <quic_jesszhan@...cinc.com>,
Sam Ravnborg <sam@...nborg.org>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
dri-devel@...ts.freedesktop.org,
devicetree@...r.kernel.org
Subject: [PATCH v4 2/5] drm/panel: st7701: Decouple DSI and DRM parts
Split into a DSI-specific part and a DRM-specific part.
Additionally, use devm_add_action_or_reset() to simplify the flow,
and disable and unprepare the panel on cleanup.
Signed-off-by: Hironori KIKUCHI <kikuchan98@...il.com>
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
---
drivers/gpu/drm/panel/panel-sitronix-st7701.c | 72 ++++++++++++-------
1 file changed, 45 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
index a9a8fd85057..a0644f7a4c8 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
@@ -539,7 +539,7 @@ static int st7701_get_modes(struct drm_panel *panel,
mode = drm_mode_duplicate(connector->dev, desc_mode);
if (!mode) {
- dev_err(&st7701->dsi->dev, "failed to add mode %ux%u@%u\n",
+ dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
desc_mode->hdisplay, desc_mode->vdisplay,
drm_mode_vrefresh(desc_mode));
return -ENOMEM;
@@ -974,42 +974,48 @@ static const struct st7701_panel_desc rg_arc_desc = {
.gip_sequence = rg_arc_gip_sequence,
};
-static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
+static void st7701_cleanup(void *data)
+{
+ struct st7701 *st7701 = (struct st7701 *)data;
+
+ drm_panel_remove(&st7701->panel);
+ drm_panel_disable(&st7701->panel);
+ drm_panel_unprepare(&st7701->panel);
+}
+
+static int st7701_probe(struct device *dev, int connector_type)
{
const struct st7701_panel_desc *desc;
struct st7701 *st7701;
int ret;
- st7701 = devm_kzalloc(&dsi->dev, sizeof(*st7701), GFP_KERNEL);
+ st7701 = devm_kzalloc(dev, sizeof(*st7701), GFP_KERNEL);
if (!st7701)
return -ENOMEM;
- desc = of_device_get_match_data(&dsi->dev);
- dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
- MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
- dsi->format = desc->format;
- dsi->lanes = desc->lanes;
+ desc = of_device_get_match_data(dev);
+ if (!desc)
+ return -ENODEV;
st7701->supplies[0].supply = "VCC";
st7701->supplies[1].supply = "IOVCC";
- ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(st7701->supplies),
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(st7701->supplies),
st7701->supplies);
if (ret < 0)
return ret;
- st7701->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+ st7701->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(st7701->reset)) {
- dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
+ dev_err(dev, "Couldn't get our reset GPIO\n");
return PTR_ERR(st7701->reset);
}
- ret = of_drm_get_panel_orientation(dsi->dev.of_node, &st7701->orientation);
+ ret = of_drm_get_panel_orientation(dev->of_node, &st7701->orientation);
if (ret < 0)
- return dev_err_probe(&dsi->dev, ret, "Failed to get orientation\n");
+ return dev_err_probe(dev, ret, "Failed to get orientation\n");
- drm_panel_init(&st7701->panel, &dsi->dev, &st7701_funcs,
- DRM_MODE_CONNECTOR_DSI);
+ drm_panel_init(&st7701->panel, dev, &st7701_funcs, connector_type);
/**
* Once sleep out has been issued, ST7701 IC required to wait 120ms
@@ -1028,27 +1034,39 @@ static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
drm_panel_add(&st7701->panel);
- mipi_dsi_set_drvdata(dsi, st7701);
- st7701->dsi = dsi;
+ dev_set_drvdata(dev, st7701);
st7701->desc = desc;
- ret = mipi_dsi_attach(dsi);
- if (ret)
- goto err_attach;
+ return devm_add_action_or_reset(dev, st7701_cleanup, st7701);
+}
+
+static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct st7701 *st7701;
+ int err;
+
+ err = st7701_probe(&dsi->dev, DRM_MODE_CONNECTOR_DSI);
+ if (err)
+ return err;
+
+ st7701 = dev_get_drvdata(&dsi->dev);
+ st7701->dsi = dsi;
+
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
+ dsi->format = st7701->desc->format;
+ dsi->lanes = st7701->desc->lanes;
+
+ err = mipi_dsi_attach(dsi);
+ if (err)
+ return dev_err_probe(&dsi->dev, err, "Failed to init MIPI DSI\n");
return 0;
-
-err_attach:
- drm_panel_remove(&st7701->panel);
- return ret;
}
static void st7701_dsi_remove(struct mipi_dsi_device *dsi)
{
- struct st7701 *st7701 = mipi_dsi_get_drvdata(dsi);
-
mipi_dsi_detach(dsi);
- drm_panel_remove(&st7701->panel);
}
static const struct of_device_id st7701_of_match[] = {
--
2.45.2
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