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drm/imx: Match imx-ipuv3-crtc components using device node in platform data 

The component master driver imx-drm-core matches component devices using
their of_node. Since commit 950b410dd1ab ("gpu: ipu-v3: Fix imx-ipuv3-crtc
module autoloading"), the imx-ipuv3-crtc dev->of_node is not set during
probing. Before that, of_node was set and caused an of: modalias to be
used instead of the platform: modalias, which broke module autoloading.

On the other hand, if dev->of_node is not set yet when the imx-ipuv3-crtc
probe function calls component_add, component matching in imx-drm-core
fails. While dev->of_node will be set once the next component tries to
bring up the component master, imx-drm-core component binding will never
succeed if one of the crtc devices is probed last.

Add of_node to the component platform data and match against the
pdata->of_node instead of dev->of_node in imx-drm-core to work around
this problem.

Cc: <stable@vger.kernel.org> # 4.4.x
Fixes: 950b410dd1ab ("gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading")
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: Lothar Waßmann <LW@KARO-electronics.de>
Tested-by: Heiko Schocher <hs@denx.de>
Tested-by: Chris Ruehl <chris.ruehl@gtsys.com.hk>
This commit is contained in:
Philipp Zabel 2016-05-12 15:00:44 +02:00
parent 2dcd0af568
commit 310944d148
4 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/imx/imx-drm-core.c
View File

@ -25,6 +25,7 @@
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_of.h>
#include <video/imx-ipu-v3.h>
#include "imx-drm.h"
@ -444,6 +445,13 @@ static int compare_of(struct device *dev, void *data)
{
struct device_node *np = data;
/* Special case for DI, dev->of_node may not be set yet */
if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
struct ipu_client_platformdata *pdata = dev->platform_data;
return pdata->of_node == np;
}
/* Special case for LDB, one device for two channels */
if (of_node_cmp(np->name, "lvds-channel") == 0) {
np = of_get_parent(np);

2
drivers/gpu/drm/imx/ipuv3-crtc.c
View File

@ -473,7 +473,7 @@ static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
ret = imx_drm_add_crtc(drm, &ipu_crtc->base, &ipu_crtc->imx_crtc,
&ipu_crtc->plane[0]->base, &ipu_crtc_helper_funcs,
ipu_crtc->dev->of_node);
pdata->of_node);
if (ret) {
dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
goto err_put_resources;

5
drivers/gpu/ipu-v3/ipu-common.c
View File

@ -997,7 +997,7 @@ struct ipu_platform_reg {
};
/* These must be in the order of the corresponding device tree port nodes */
static const struct ipu_platform_reg client_reg[] = {
static struct ipu_platform_reg client_reg[] = {
{
.pdata = {
.csi = 0,
@ -1048,7 +1048,7 @@ static int ipu_add_client_devices(struct ipu_soc *ipu, unsigned long ipu_base)
mutex_unlock(&ipu_client_id_mutex);
for (i = 0; i < ARRAY_SIZE(client_reg); i++) {
const struct ipu_platform_reg *reg = &client_reg[i];
struct ipu_platform_reg *reg = &client_reg[i];
struct platform_device *pdev;
struct device_node *of_node;
@ -1070,6 +1070,7 @@ static int ipu_add_client_devices(struct ipu_soc *ipu, unsigned long ipu_base)
pdev->dev.parent = dev;
reg->pdata.of_node = of_node;
ret = platform_device_add_data(pdev, &reg->pdata,
sizeof(reg->pdata));
if (!ret)

2
include/video/imx-ipu-v3.h
View File

@ -16,6 +16,7 @@
#include <linux/videodev2.h>
#include <linux/bitmap.h>
#include <linux/fb.h>
#include <linux/of.h>
#include <media/v4l2-mediabus.h>
#include <video/videomode.h>
@ -345,6 +346,7 @@ struct ipu_client_platformdata {
int dc;
int dp;
int dma[2];
struct device_node *of_node;
};
#endif /* __DRM_IPU_H__ */