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Message-ID: <a319b8b1a6eeffbd98bca39f45249237538eff1f.camel@nxp.com>
Date: Wed, 31 Mar 2021 14:18:12 +0800
From: Liu Ying <victor.liu@....com>
To: Robert Foss <robert.foss@...aro.org>
Cc: dri-devel <dri-devel@...ts.freedesktop.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-media <linux-media@...r.kernel.org>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>, shawnguo@...nel.org,
s.hauer@...gutronix.de, kernel@...gutronix.de,
Fabio Estevam <festevam@...il.com>, linux-imx@....com,
Mauro Carvalho Chehab <mchehab@...nel.org>,
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>, kishon@...com,
Vinod Koul <vkoul@...nel.org>, lee.jones@...aro.org
Subject: Re: [PATCH v6 09/14] drm/bridge: imx: Add i.MX8qxp pixel link to
DPI support
Hi Robert,
On Tue, 2021-03-30 at 11:42 +0200, Robert Foss wrote:
> Hey Liu,
>
> checkpatch --strict had some complaints, with those fixed feel free to
> add my r-b.
>
> Reviewed-by: Robert Foss <robert.foss@...aro.org>
Thanks for your review.
In the next version, I'll also fix the complaints from
'checkpatch.pl --strict' for the pixel combiner driver(patch 4/16) and
pixel link driver(patch 6/16). If no objections, I'll keep your R-b
tags on them.
>
> On Wed, 17 Mar 2021 at 04:57, Liu Ying <victor.liu@....com> wrote:
> > This patch adds a drm bridge driver for i.MX8qxp pixel link to display
> > pixel interface(PXL2DPI). The PXL2DPI interfaces the pixel link 36-bit
> > data output and the DSI controller’s MIPI-DPI 24-bit data input, and
> > inputs of LVDS Display Bridge(LDB) module used in LVDS mode, to remap
> > the pixel color codings between those modules. The PXL2DPI is purely
> > combinatorial.
> >
> > Signed-off-by: Liu Ying <victor.liu@....com>
> > ---
> > v5->v6:
> > * No change.
> >
> > v4->v5:
> > * No change.
> >
> > v3->v4:
> > * Use 'fsl,sc-resource' DT property to get the SCU resource ID associated with
> > the PXL2DPI instance instead of using alias ID. (Rob)
> >
> > v2->v3:
> > * Call syscon_node_to_regmap() to get regmap instead of
> > syscon_regmap_lookup_by_phandle().
> >
> > v1->v2:
> > * Drop unnecessary port availability check.
> >
> > drivers/gpu/drm/bridge/imx/Kconfig | 8 +
> > drivers/gpu/drm/bridge/imx/Makefile | 1 +
> > drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c | 485 +++++++++++++++++++++++++++
> > 3 files changed, 494 insertions(+)
> > create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
> >
> > diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig
> > index 4d1f027..1ea1ce7 100644
> > --- a/drivers/gpu/drm/bridge/imx/Kconfig
> > +++ b/drivers/gpu/drm/bridge/imx/Kconfig
> > @@ -14,3 +14,11 @@ config DRM_IMX8QXP_PIXEL_LINK
> > help
> > Choose this to enable display pixel link found in
> > Freescale i.MX8qm/qxp processors.
> > +
> > +config DRM_IMX8QXP_PIXEL_LINK_TO_DPI
> > + tristate "Freescale i.MX8QXP pixel link to display pixel interface"
> > + depends on OF
> > + select DRM_KMS_HELPER
> > + help
> > + Choose this to enable pixel link to display pixel interface(PXL2DPI)
> > + found in Freescale i.MX8qxp processor.
> > diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile
> > index c15469f..e74dd64 100644
> > --- a/drivers/gpu/drm/bridge/imx/Makefile
> > +++ b/drivers/gpu/drm/bridge/imx/Makefile
> > @@ -1,2 +1,3 @@
> > obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o
> > obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK) += imx8qxp-pixel-link.o
> > +obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK_TO_DPI) += imx8qxp-pxl2dpi.o
> > diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
> > new file mode 100644
> > index 00000000..6696855
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
> > @@ -0,0 +1,485 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +
> > +/*
> > + * Copyright 2020 NXP
> > + */
> > +
> > +#include <linux/firmware/imx/svc/misc.h>
> > +#include <linux/mfd/syscon.h>
> > +#include <linux/module.h>
> > +#include <linux/of.h>
> > +#include <linux/of_device.h>
> > +#include <linux/of_graph.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regmap.h>
> > +
> > +#include <drm/drm_atomic_state_helper.h>
> > +#include <drm/drm_bridge.h>
> > +#include <drm/drm_of.h>
> > +#include <drm/drm_print.h>
> > +
> > +#include <dt-bindings/firmware/imx/rsrc.h>
> > +
> > +#define PXL2DPI_CTRL 0x40
> > +#define CFG1_16BIT 0x0
> > +#define CFG2_16BIT 0x1
> > +#define CFG3_16BIT 0x2
> > +#define CFG1_18BIT 0x3
> > +#define CFG2_18BIT 0x4
> > +#define CFG_24BIT 0x5
> > +
> > +#define DRIVER_NAME "imx8qxp-pxl2dpi"
> > +
> > +struct imx8qxp_pxl2dpi {
> > + struct regmap *regmap;
> > + struct drm_bridge bridge;
> > + struct drm_bridge *next_bridge;
> > + struct drm_bridge *companion;
> > + struct device *dev;
> > + struct imx_sc_ipc *ipc_handle;
> > + u32 sc_resource;
> > + u32 in_bus_format;
> > + u32 out_bus_format;
> > + u32 pl_sel;
> > +};
> > +
> > +#define bridge_to_p2d(b) container_of(b, struct imx8qxp_pxl2dpi, bridge)
> > +
> > +static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge,
> > + enum drm_bridge_attach_flags flags)
> > +{
> > + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
> > +
> > + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
> > + DRM_DEV_ERROR(p2d->dev,
> > + "do not support creating a drm_connector\n");
> > + return -EINVAL;
> > + }
> > +
> > + if (!bridge->encoder) {
> > + DRM_DEV_ERROR(p2d->dev, "missing encoder\n");
> > + return -ENODEV;
> > + }
> > +
> > + return drm_bridge_attach(bridge->encoder,
> > + p2d->next_bridge, bridge,
> > + DRM_BRIDGE_ATTACH_NO_CONNECTOR);
> > +}
> > +
> > +static int
> > +imx8qxp_pxl2dpi_bridge_atomic_check(struct drm_bridge *bridge,
> > + struct drm_bridge_state *bridge_state,
> > + struct drm_crtc_state *crtc_state,
> > + struct drm_connector_state *conn_state)
> > +{
> > + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
> > +
> > + p2d->in_bus_format = bridge_state->input_bus_cfg.format;
> > + p2d->out_bus_format = bridge_state->output_bus_cfg.format;
> > +
> > + return 0;
> > +}
> > +
> > +static void
> > +imx8qxp_pxl2dpi_bridge_mode_set(struct drm_bridge *bridge,
> > + const struct drm_display_mode *mode,
> > + const struct drm_display_mode *adjusted_mode)
> > +{
> > + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
> > + struct imx8qxp_pxl2dpi *companion_p2d;
> > + int ret;
> > +
> > + ret = pm_runtime_get_sync(p2d->dev);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(p2d->dev,
> > + "failed to get runtime PM sync: %d\n", ret);
> > +
> > + ret = imx_sc_misc_set_control(p2d->ipc_handle, p2d->sc_resource,
> > + IMX_SC_C_PXL_LINK_SEL, p2d->pl_sel);
> > + if (ret)
> > + DRM_DEV_ERROR(p2d->dev,
> > + "failed to set pixel link selection(%u): %d\n",
> > + p2d->pl_sel, ret);
> > +
> > + switch (p2d->out_bus_format) {
> > + case MEDIA_BUS_FMT_RGB888_1X24:
> > + regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG_24BIT);
> > + break;
> > + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
> > + regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG2_18BIT);
> > + break;
> > + default:
> > + DRM_DEV_ERROR(p2d->dev,
> > + "unsupported output bus format 0x%08x\n",
> > + p2d->out_bus_format);
> > + }
> > +
> > + if (p2d->companion) {
> > + companion_p2d = bridge_to_p2d(p2d->companion);
> > +
> > + companion_p2d->in_bus_format = p2d->in_bus_format;
> > + companion_p2d->out_bus_format = p2d->out_bus_format;
> > +
> > + p2d->companion->funcs->mode_set(p2d->companion, mode,
> > + adjusted_mode);
> > + }
> > +}
> > +
> > +static void
> > +imx8qxp_pxl2dpi_bridge_atomic_disable(struct drm_bridge *bridge,
> > + struct drm_bridge_state *old_bridge_state)
> > +{
> > + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
> > + int ret;
> > +
> > + ret = pm_runtime_put(p2d->dev);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(p2d->dev, "failed to put runtime PM: %d\n", ret);
> > +
> > + if (p2d->companion)
> > + p2d->companion->funcs->atomic_disable(p2d->companion,
> > + old_bridge_state);
> > +}
> > +
> > +static const u32 imx8qxp_pxl2dpi_bus_output_fmts[] = {
> > + MEDIA_BUS_FMT_RGB888_1X24,
> > + MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
> > +};
> > +
> > +static bool imx8qxp_pxl2dpi_bus_output_fmt_supported(u32 fmt)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts); i++) {
> > + if (imx8qxp_pxl2dpi_bus_output_fmts[i] == fmt)
> > + return true;
> > + }
> > +
> > + return false;
> > +}
> > +
> > +static u32 *
> > +imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
> > + struct drm_bridge_state *bridge_state,
> > + struct drm_crtc_state *crtc_state,
> > + struct drm_connector_state *conn_state,
> > + u32 output_fmt,
> > + unsigned int *num_input_fmts)
> > +{
>
> CHECK: Alignment should match open parenthesis
> #217: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:164:
> +imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
A fix for this would require over 80 characters per line.
Anyway, to make checkpatch happy, I'll do that in the next version.
>
>
> > + u32 *input_fmts;
> > +
> > + if (!imx8qxp_pxl2dpi_bus_output_fmt_supported(output_fmt))
> > + return NULL;
> > +
> > + *num_input_fmts = 1;
> > +
> > + input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
> > + if (!input_fmts)
> > + return NULL;
> > +
> > + switch (output_fmt) {
> > + case MEDIA_BUS_FMT_RGB888_1X24:
> > + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X36_CPADLO;
> > + break;
> > + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
> > + input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X36_CPADLO;
> > + break;
> > + default:
> > + kfree(input_fmts);
> > + input_fmts = NULL;
> > + break;
> > + }
> > +
> > + return input_fmts;
> > +}
> > +
> > +static u32 *
> > +imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
> > + struct drm_bridge_state *bridge_state,
> > + struct drm_crtc_state *crtc_state,
> > + struct drm_connector_state *conn_state,
> > + unsigned int *num_output_fmts)
>
> CHECK: Alignment should match open parenthesis
> #252: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:199:
> +imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
Ditto.
>
>
> > +{
> > + *num_output_fmts = ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts);
> > + return kmemdup(imx8qxp_pxl2dpi_bus_output_fmts,
> > + sizeof(imx8qxp_pxl2dpi_bus_output_fmts), GFP_KERNEL);
> > +}
> > +
> > +static const struct drm_bridge_funcs imx8qxp_pxl2dpi_bridge_funcs = {
> > + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> > + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> > + .atomic_reset = drm_atomic_helper_bridge_reset,
> > + .attach = imx8qxp_pxl2dpi_bridge_attach,
> > + .atomic_check = imx8qxp_pxl2dpi_bridge_atomic_check,
> > + .mode_set = imx8qxp_pxl2dpi_bridge_mode_set,
> > + .atomic_disable = imx8qxp_pxl2dpi_bridge_atomic_disable,
> > + .atomic_get_input_bus_fmts =
> > + imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts,
> > + .atomic_get_output_bus_fmts =
> > + imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts,
> > +};
> > +
> > +static struct device_node *
> > +imx8qxp_pxl2dpi_get_available_ep_from_port(struct imx8qxp_pxl2dpi *p2d,
> > + u32 port_id)
> > +{
> > + struct device_node *port, *ep;
> > + int ep_cnt;
> > +
> > + port = of_graph_get_port_by_id(p2d->dev->of_node, port_id);
> > + if (!port) {
> > + DRM_DEV_ERROR(p2d->dev, "failed to get port@%u\n", port_id);
> > + return ERR_PTR(-ENODEV);
> > + }
> > +
> > + ep_cnt = of_get_available_child_count(port);
> > + if (ep_cnt == 0) {
> > + DRM_DEV_ERROR(p2d->dev, "no available endpoints of port@%u\n",
> > + port_id);
>
> CHECK: Alignment should match open parenthesis
> #292: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:239:
> + DRM_DEV_ERROR(p2d->dev, "no available endpoints of port@%u\n",
> + port_id);
Will fix in the next version.
>
>
> > + ep = ERR_PTR(-ENODEV);
> > + goto out;
> > + } else if (ep_cnt > 1) {
> > + DRM_DEV_ERROR(p2d->dev,
> > + "invalid available endpoints of port@%u\n", port_id);
>
> CHECK: Alignment should match open parenthesis
> #297: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:244:
> + DRM_DEV_ERROR(p2d->dev,
> + "invalid available endpoints of port@%u\n", port_id);
Ditto.
>
> > + ep = ERR_PTR(-ENOTSUPP);
>
> WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
> #298: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:245:
> + ep = ERR_PTR(-ENOTSUPP);
>
> Maybe the more correct return value would be -EINVAL.
Will use -EINVAL in the next version.
>
>
> > + goto out;
> > + }
> > +
> > + ep = of_get_next_available_child(port, NULL);
> > + if (!ep) {
> > + DRM_DEV_ERROR(p2d->dev,
> > + "failed to get available endpoint of port@%u\n",
> > + port_id);
>
> This ^^ indentation also looks funny.
Will match the open paranthesis in the next version.
>
> > + ep = ERR_PTR(-ENODEV);
> > + goto out;
> > + }
> > +out:
> > + of_node_put(port);
> > + return ep;
> > +}
> > +
> > +static struct drm_bridge *
> > +imx8qxp_pxl2dpi_find_next_bridge(struct imx8qxp_pxl2dpi *p2d)
> > +{
> > + struct device_node *ep, *remote;
> > + struct drm_bridge *next_bridge;
> > + int ret;
> > +
> > + ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 1);
> > + if (IS_ERR(ep)) {
> > + ret = PTR_ERR(ep);
> > + return ERR_PTR(ret);
> > + }
> > +
> > + remote = of_graph_get_remote_port_parent(ep);
> > + if (!remote || !of_device_is_available(remote)) {
> > + DRM_DEV_ERROR(p2d->dev, "no available remote\n");
> > + next_bridge = ERR_PTR(-ENODEV);
> > + goto out;
> > + } else if (!of_device_is_available(remote->parent)) {
> > + DRM_DEV_ERROR(p2d->dev, "remote parent is not available\n");
> > + next_bridge = ERR_PTR(-ENODEV);
> > + goto out;
> > + }
> > +
> > + next_bridge = of_drm_find_bridge(remote);
> > + if (!next_bridge) {
> > + next_bridge = ERR_PTR(-EPROBE_DEFER);
> > + goto out;
> > + }
> > +out:
> > + of_node_put(remote);
> > + of_node_put(ep);
> > +
> > + return next_bridge;
> > +}
> > +
> > +static int imx8qxp_pxl2dpi_set_pixel_link_sel(struct imx8qxp_pxl2dpi *p2d)
> > +{
> > + struct device_node *ep;
> > + struct of_endpoint endpoint;
> > + int ret;
> > +
> > + ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 0);
> > + if (IS_ERR(ep))
> > + return PTR_ERR(ep);
> > +
> > + ret = of_graph_parse_endpoint(ep, &endpoint);
> > + if (ret) {
> > + DRM_DEV_ERROR(p2d->dev,
> > + "failed to parse endpoint of port@0: %d\n", ret);
> > + goto out;
> > + }
> > +
> > + p2d->pl_sel = endpoint.id;
> > +out:
> > + of_node_put(ep);
> > +
> > + return ret;
> > +}
> > +
> > +static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d)
> > +{
> > + struct imx8qxp_pxl2dpi *companion_p2d;
> > + struct device *dev = p2d->dev;
> > + struct device_node *companion;
> > + struct device_node *port1, *port2;
> > + const struct of_device_id *match;
> > + int dual_link;
> > + int ret = 0;
> > +
> > + /* Locate the companion PXL2DPI for dual-link operation, if any. */
> > + companion = of_parse_phandle(dev->of_node, "fsl,companion-pxl2dpi", 0);
> > + if (!companion)
> > + return 0;
> > +
> > + if (!of_device_is_available(companion)) {
> > + DRM_DEV_ERROR(dev, "companion PXL2DPI is not available\n");
> > + ret = -ENODEV;
> > + goto out;
> > + }
> > +
> > + /*
> > + * Sanity check: the companion bridge must have the same compatible
> > + * string.
> > + */
> > + match = of_match_device(dev->driver->of_match_table, dev);
> > + if (!of_device_is_compatible(companion, match->compatible)) {
> > + DRM_DEV_ERROR(dev, "companion PXL2DPI is incompatible\n");
> > + ret = -ENXIO;
> > + goto out;
> > + }
> > +
> > + p2d->companion = of_drm_find_bridge(companion);
> > + if (!p2d->companion) {
> > + ret = -EPROBE_DEFER;
> > + DRM_DEV_DEBUG_DRIVER(p2d->dev,
> > + "failed to find companion bridge: %d\n", ret);
>
> CHECK: Alignment should match open parenthesis
> #411: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:358:
> + DRM_DEV_DEBUG_DRIVER(p2d->dev,
> + "failed to find companion bridge: %d\n", ret);
Will fix in the next version.
>
>
> > + goto out;
> > + }
> > +
> > + companion_p2d = bridge_to_p2d(p2d->companion);
> > +
> > + /*
> > + * We need to work out if the sink is expecting us to function in
> > + * dual-link mode. We do this by looking at the DT port nodes that
> > + * the next bridges are connected to. If they are marked as expecting
> > + * even pixels and odd pixels than we need to use the companion PXL2DPI.
> > + */
> > + port1 = of_graph_get_port_by_id(p2d->next_bridge->of_node, 1);
> > + port2 = of_graph_get_port_by_id(companion_p2d->next_bridge->of_node, 1);
> > + dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
> > + of_node_put(port1);
> > + of_node_put(port2);
> > +
> > + if (dual_link < 0) {
> > + ret = dual_link;
> > + DRM_DEV_ERROR(dev, "failed to get dual link pixel order: %d\n",
> > + ret);
>
> CHECK: Alignment should match open parenthesis
> #432: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:379:
> + DRM_DEV_ERROR(dev, "failed to get dual link pixel order: %d\n",
> + ret);
Ditto.
>
>
> > + goto out;
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev,
> > + "dual-link configuration detected (companion bridge %pOF)\n",
> > + companion);
>
> CHECK: Alignment should match open parenthesis
> #437: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:384:
> + DRM_DEV_DEBUG_DRIVER(dev,
> + "dual-link configuration detected (companion bridge %pOF)\n",
Ditto.
>
>
> > +out:
> > + of_node_put(companion);
> > + return ret;
> > +}
> > +
> > +static int imx8qxp_pxl2dpi_bridge_probe(struct platform_device *pdev)
> > +{
> > + struct imx8qxp_pxl2dpi *p2d;
> > + struct device *dev = &pdev->dev;
> > + struct device_node *np = dev->of_node;
> > + int ret;
> > +
> > + p2d = devm_kzalloc(dev, sizeof(*p2d), GFP_KERNEL);
> > + if (!p2d)
> > + return -ENOMEM;
> > +
> > + p2d->regmap = syscon_node_to_regmap(np->parent);
> > + if (IS_ERR(p2d->regmap)) {
> > + ret = PTR_ERR(p2d->regmap);
> > + if (ret != -EPROBE_DEFER)
> > + DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + ret = imx_scu_get_handle(&p2d->ipc_handle);
> > + if (ret) {
> > + if (ret != -EPROBE_DEFER)
> > + DRM_DEV_ERROR(dev, "failed to get SCU ipc handle: %d\n",
> > + ret);
>
> CHECK: Alignment should match open parenthesis
> #467: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:414:
> + DRM_DEV_ERROR(dev, "failed to get SCU ipc handle: %d\n",
> + ret);
Ditto.
>
>
> > + return ret;
> > + }
> > +
> > + p2d->dev = dev;
> > +
> > + ret = of_property_read_u32(np, "fsl,sc-resource", &p2d->sc_resource);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "failed to get SC resource %d\n", ret);
> > + return ret;
> > + }
> > +
> > + p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d);
> > + if (IS_ERR(p2d->next_bridge)) {
> > + ret = PTR_ERR(p2d->next_bridge);
> > + if (ret != -EPROBE_DEFER)
> > + DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n",
> > + ret);
>
> CHECK: Alignment should match open parenthesis
> #484: FILE: drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:431:
> + DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n",
> + ret);
Ditto.
Liu Ying
>
>
> > + return ret;
> > + }
> > +
> > + ret = imx8qxp_pxl2dpi_set_pixel_link_sel(p2d);
> > + if (ret)
> > + return ret;
> > +
> > + ret = imx8qxp_pxl2dpi_parse_dt_companion(p2d);
> > + if (ret)
> > + return ret;
> > +
> > + platform_set_drvdata(pdev, p2d);
> > + pm_runtime_enable(dev);
> > +
> > + p2d->bridge.driver_private = p2d;
> > + p2d->bridge.funcs = &imx8qxp_pxl2dpi_bridge_funcs;
> > + p2d->bridge.of_node = np;
> > +
> > + drm_bridge_add(&p2d->bridge);
> > +
> > + return ret;
> > +}
> > +
> > +static int imx8qxp_pxl2dpi_bridge_remove(struct platform_device *pdev)
> > +{
> > + struct imx8qxp_pxl2dpi *p2d = platform_get_drvdata(pdev);
> > +
> > + drm_bridge_remove(&p2d->bridge);
> > +
> > + pm_runtime_disable(&pdev->dev);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct of_device_id imx8qxp_pxl2dpi_dt_ids[] = {
> > + { .compatible = "fsl,imx8qxp-pxl2dpi", },
> > + { /* sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, imx8qxp_pxl2dpi_dt_ids);
> > +
> > +static struct platform_driver imx8qxp_pxl2dpi_bridge_driver = {
> > + .probe = imx8qxp_pxl2dpi_bridge_probe,
> > + .remove = imx8qxp_pxl2dpi_bridge_remove,
> > + .driver = {
> > + .of_match_table = imx8qxp_pxl2dpi_dt_ids,
> > + .name = DRIVER_NAME,
> > + },
> > +};
> > +module_platform_driver(imx8qxp_pxl2dpi_bridge_driver);
> > +
> > +MODULE_DESCRIPTION("i.MX8QXP pixel link to DPI bridge driver");
> > +MODULE_AUTHOR("Liu Ying <victor.liu@....com>");
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_ALIAS("platform:" DRIVER_NAME);
> > --
> > 2.7.4
> >
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