[PATCH] drm/tiny: pixpaper: Fix missing dependency on DRM_GEM_SHMEM_HELPER

[LiangCheng Wang <zaq14760@gmail.com>]

The driver uses drm_gem_shmem_prime_import_no_map() and
drm_gem_shmem_dumb_create(), but the Kconfig currently selects
DRM_GEM_DMA_HELPER instead of DRM_GEM_SHMEM_HELPER. This causes
link failures when DRM_GEM_SHMEM_HELPER is not enabled.

Select DRM_GEM_SHMEM_HELPER to fix the build.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202509220320.gfFZjmyg-lkp@intel.com/
Fixes: c9e70639f591 ("drm: tiny: Add support for Mayqueen Pixpaper e-ink panel")

Signed-off-by: LiangCheng Wang <zaq14760@gmail.com>
---
This patch fixes a build failure in the Pixpaper DRM tiny driver caused by
a missing dependency on DRM_GEM_SHMEM_HELPER. The driver calls
drm_gem_shmem_prime_import_no_map() and drm_gem_shmem_dumb_create(), which
require CONFIG_DRM_GEM_SHMEM_HELPER to be enabled.

The issue was reported by the 0-day kernel test robot. This patch updates
the Kconfig to select DRM_GEM_SHMEM_HELPER instead of DRM_GEM_DMA_HELPER.
---
 drivers/gpu/drm/tiny/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
index 94a5bf61a115929640022128e20c723ab7c0e735..7d9e85e932d7fd7bdb6ad7a4c6ba0f835841f623 100644
--- a/drivers/gpu/drm/tiny/Kconfig
+++ b/drivers/gpu/drm/tiny/Kconfig
@@ -86,7 +86,7 @@ config DRM_PIXPAPER
         tristate "DRM support for PIXPAPER display panels"
         depends on DRM && SPI
         select DRM_CLIENT_SELECTION
-        select DRM_GEM_DMA_HELPER
+        select DRM_GEM_SHMEM_HELPER
         select DRM_KMS_HELPER
         help
 	  DRM driver for the Mayqueen Pixpaper e-ink display panel.

---
base-commit: 846bd2225ec3cfa8be046655e02b9457ed41973e
change-id: 20250922-bar-cd1f3e834e78

Best regards,
-- 
LiangCheng Wang <zaq14760@gmail.com>