Subject: linux-next: build failure after merge of the drm-misc tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 3 Nov 2025 11:24:18 +1100

Hi all,

After merging the drm-misc tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c: In function 'rzg2l_du_probe':
drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c:173:9: error: implicit declaration of function 'drm_info'; did you mean 'pr_info'? [-Wimplicit-function-declaration]
  173 |         drm_info(&rcdu->ddev, "Device %s probed\n", dev_name(&pdev->dev));
      |         ^~~~~~~~
      |         pr_info

Presumably caused by commit

  9695c143b72a ("drm/buddy: replace drm_print.h include with a forward declaration")
or
  ea722522d505 ("drm/mm: replace drm_print.h include with a forward declaration")
or
  d7a849d126d0 ("drm/ttm: replace drm_print.h include with a forward declaration")

I have applied the following fix patch for today:

From: Stephen Rothwell <[email-masked]>
Date: Mon, 3 Nov 2025 11:12:27 +1100
Subject: [PATCH] fix up for dropping drm_print.h includes

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
index e1aa6a719529..c34b1a13e685 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
@@ -18,6 +18,7 @@
 #include <drm/drm_fbdev_dma.h>
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_print.h>
 
 #include "rzg2l_du_drv.h"
 #include "rzg2l_du_kms.h"
-- 
2.51.1

Which lead to this:

drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'vop2_convert_format':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:215:17: error: implicit declaration of function 'DRM_ERROR'; did you mean 'SO_ERROR'? [-Wimplicit-function-declaration]
  215 |                 DRM_ERROR("unsupported format[%08x]\n", format);
      |                 ^~~~~~~~~
      |                 SO_ERROR
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'rockchip_vop2_mod_supported':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:395:33: error: implicit declaration of function 'drm_dbg_kms' [-Wimplicit-function-declaration]
  395 |                                 drm_dbg_kms(vop2->drm,
      |                                 ^~~~~~~~~~~
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'vop2_setup_scale':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:602:25: error: implicit declaration of function 'drm_dbg'; did you mean 'dev_dbg'? [-Wimplicit-function-declaration]
  602 |                         drm_dbg(vop2->drm, "%s dst_w[%d] should align as 2 pixel\n",
      |                         ^~~~~~~
      |                         dev_dbg
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'vop2_core_clks_prepare_enable':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:763:17: error: implicit declaration of function 'drm_err'; did you mean 'pr_err'? [-Wimplicit-function-declaration]
  763 |                 drm_err(vop2->drm, "failed to enable hclk - %d\n", ret);
      |                 ^~~~~~~
      |                 pr_err
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'vop2_crtc_atomic_disable':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:967:17: error: implicit declaration of function 'drm_info'; did you mean 'pr_info'? [-Wimplicit-function-declaration]
  967 |                 drm_info(vop2->drm, "wait for vp%d dsp_hold timeout\n", vp->id);
      |                 ^~~~~~~~
      |                 pr_info
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'vop2_crtc_atomic_enable':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:1758:41: error: implicit declaration of function 'drm_warn'; did you mean 'dev_warn'? [-Wimplicit-function-declaration]
 1758 |                                         drm_warn(vop2->drm,
      |                                         ^~~~~~~~
      |                                         dev_warn
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c: In function 'rk3576_vp_isr':
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2198:17: error: implicit declaration of function 'drm_err_ratelimited'; did you mean 'pr_err_ratelimited'? [-Wimplicit-function-declaration]
 2198 |                 drm_err_ratelimited(vop2->drm, "POST_BUF_EMPTY irq err at vp%d\n", vp->id);
      |                 ^~~~~~~~~~~~~~~~~~~
      |                 pr_err_ratelimited

So, I have instead used the drm-misc tree from next-20251031 for today.
-- 
Cheers,
Stephen Rothwell