drm/msm/dp: add linux/io.h header to fix build errors

Add <linux/io.h> header to pull in readl/writel and friends.
This eliminates the following build errors:

drivers/gpu/drm/msm/dp/dp_panel.c: In function 'msm_dp_read_link':
drivers/gpu/drm/msm/dp/dp_panel.c:33:16: error: implicit declaration of function 'readl_relaxed' [-Wimplicit-function-declaration]
   33 |         return readl_relaxed(panel->link_base + offset);
drivers/gpu/drm/msm/dp/dp_panel.c: In function 'msm_dp_write_link':
drivers/gpu/drm/msm/dp/dp_panel.c:43:9: error: implicit declaration of function 'writel' [-Wimplicit-function-declaration]
   43 |         writel(data, panel->link_base + offset);

Fixes: 603fc0fc30bf ("drm/msm/dp: drop the msm_dp_catalog module")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Stephen Boyd <swboyd@chromium.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Cc: Dmitry Baryshkov <lumag@kernel.org>
Cc: Rob Clark <robin.clark@oss.qualcomm.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/659442/
Link: https://lore.kernel.org/r/20250617185611.2965223-1-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 489e39f6c0ac0d2ce18d0ff83b5fed23770a6b1e..15b7f6c7146e1176a80b5c9d25896b1c8ede3aed 100644 (file)
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -12,6 +12,8 @@
 #include <drm/drm_of.h>
 #include <drm/drm_print.h>
 
+#include <linux/io.h>
+
 #define DP_INTF_CONFIG_DATABUS_WIDEN     BIT(4)
 
 #define DP_MAX_NUM_DP_LANES    4