This op does not pass any pointer to the DSI device, so the DSI host driver
cannot store it.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
---
 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
index f87337c3cbb54559e9e8d416cbe801647f4a7688..33bd2d20be9c3f8d0c43b67d21e0e86566b48ab3 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
@@ -689,19 +689,19 @@ static const struct drm_bridge_funcs rzg2l_mipi_dsi_bridge_ops = {
  */
 
 static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host,
-				      struct mipi_dsi_device *device)
+				      const struct mipi_dsi_bus_fmt *bus_fmt)
 {
 	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
 	int ret;
 
-	if (device->lanes > dsi->num_data_lanes) {
+	if (bus_fmt->lanes > dsi->num_data_lanes) {
 		dev_err(dsi->dev,
 			"Number of lines of device (%u) exceeds host (%u)\n",
-			device->lanes, dsi->num_data_lanes);
+			bus_fmt->lanes, dsi->num_data_lanes);
 		return -EINVAL;
 	}
 
-	switch (mipi_dsi_pixel_format_to_bpp(device->format)) {
+	switch (mipi_dsi_pixel_format_to_bpp(bus_fmt->format)) {
 	case 24:
 		break;
 	case 18:
@@ -714,13 +714,13 @@ static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host,
 		}
 		break;
 	default:
-		dev_err(dsi->dev, "Unsupported format 0x%04x\n", device->format);
+		dev_err(dsi->dev, "Unsupported format 0x%04x\n", bus_fmt->format);
 		return -EINVAL;
 	}
 
-	dsi->lanes = device->lanes;
-	dsi->format = device->format;
-	dsi->mode_flags = device->mode_flags;
+	dsi->lanes = bus_fmt->lanes;
+	dsi->format = bus_fmt->format;
+	dsi->mode_flags = bus_fmt->mode_flags;
 
 	dsi->next_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node,
 						  1, 0);
@@ -904,7 +904,7 @@ static ssize_t rzg2l_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
 }
 
 static const struct mipi_dsi_host_ops rzg2l_mipi_dsi_host_ops = {
-	.attach = rzg2l_mipi_dsi_host_attach,
+	.attach_new = rzg2l_mipi_dsi_host_attach,
 	.detach = rzg2l_mipi_dsi_host_detach,
 	.transfer = rzg2l_mipi_dsi_host_transfer,
 };

-- 
2.49.0

Hi Luca,

kernel test robot noticed the following build errors:

[auto build test ERROR on 1174bf15bd601f17556f721798cd9183e169549a]

url:    https://github.com/intel-lab-lkp/linux/commits/Luca-Ceresoli/drm-mipi-dsi-add-sanity-check-of-lane-number-in-mipi_dsi_attach/20250626-005002
base:   1174bf15bd601f17556f721798cd9183e169549a
patch link:    https://lore.kernel.org/r/20250625-drm-dsi-host-no-device-ptr-v1-22-e36bc258a7c5%40bootlin.com
patch subject: [PATCH 22/32] drm: renesas: rz-du: rzg2l_mipi_dsi: convert to the .attach_new op
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20250627/202506270718.iCW6cHYD-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250627/202506270718.iCW6cHYD-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506270718.iCW6cHYD-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/device.h:15,
                    from include/linux/dma-mapping.h:5,
                    from drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c:11:
   drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c: In function 'rzg2l_mipi_dsi_host_attach':
>> drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c:712:33: error: 'device' undeclared (first use in this function)
     712 |                                 device->format);
         |                                 ^~~~~~
   include/linux/dev_printk.h:110:37: note: in definition of macro 'dev_printk_index_wrap'
     110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \
         |                                     ^~~~~~~~~~~
   drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c:711:25: note: in expansion of macro 'dev_err'
     711 |                         dev_err(dsi->dev, "Unsupported format 0x%04x\n",
         |                         ^~~~~~~
   drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c:712:33: note: each undeclared identifier is reported only once for each function it appears in
     712 |                                 device->format);
         |                                 ^~~~~~
   include/linux/dev_printk.h:110:37: note: in definition of macro 'dev_printk_index_wrap'
     110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \
         |                                     ^~~~~~~~~~~
   drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c:711:25: note: in expansion of macro 'dev_err'
     711 |                         dev_err(dsi->dev, "Unsupported format 0x%04x\n",
         |                         ^~~~~~~


vim +/device +712 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c

7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  686  
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  687  /* -----------------------------------------------------------------------------
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  688   * Host setting
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  689   */
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  690  
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  691  static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host,
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  692  				      const struct mipi_dsi_bus_fmt *bus_fmt)
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  693  {
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  694  	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  695  	int ret;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  696  
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  697  	if (bus_fmt->lanes > dsi->num_data_lanes) {
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  698  		dev_err(dsi->dev,
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  699  			"Number of lines of device (%u) exceeds host (%u)\n",
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  700  			bus_fmt->lanes, dsi->num_data_lanes);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  701  		return -EINVAL;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  702  	}
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  703  
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  704  	switch (mipi_dsi_pixel_format_to_bpp(bus_fmt->format)) {
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  705  	case 24:
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  706  		break;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  707  	case 18:
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  708  		break;
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  709  	case 16:
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  710  		if (!(dsi->info->features & RZ_MIPI_DSI_FEATURE_16BPP)) {
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  711  			dev_err(dsi->dev, "Unsupported format 0x%04x\n",
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09 @712  				device->format);
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  713  			return -EINVAL;
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  714  		}
a56a6b81d80fdf drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Lad Prabhakar 2025-06-09  715  		break;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  716  	default:
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  717  		dev_err(dsi->dev, "Unsupported format 0x%04x\n", bus_fmt->format);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  718  		return -EINVAL;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  719  	}
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  720  
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  721  	dsi->lanes = bus_fmt->lanes;
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  722  	dsi->format = bus_fmt->format;
e8120e232c40c1 drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Luca Ceresoli 2025-06-25  723  	dsi->mode_flags = bus_fmt->mode_flags;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  724  
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  725  	dsi->next_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node,
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  726  						  1, 0);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  727  	if (IS_ERR(dsi->next_bridge)) {
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  728  		ret = PTR_ERR(dsi->next_bridge);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  729  		dev_err(dsi->dev, "failed to get next bridge: %d\n", ret);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  730  		return ret;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  731  	}
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  732  
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  733  	drm_bridge_add(&dsi->bridge);
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  734  
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  735  	return 0;
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  736  }
7a043f978ed143 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c       Biju Das      2022-09-20  737  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki