From: Arnd Bergmann <arnd@arndb.de>

The driver started using readl/writel, which are defined in linux/io.h,
so this needs to be included here:

drivers/gpu/drm/msm/dp/dp_panel.c:33:9: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   33 |         return readl_relaxed(panel->link_base + offset);

Fixes: 9d47325ee063 ("drm/msm/dp: drop the msm_dp_catalog module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/msm/dp/dp_panel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 489e39f6c0ac..ecd5d3665541 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
  */
+#include <linux/io.h>
 
 #include "dp_panel.h"
 #include "dp_reg.h"
-- 
2.39.5

On 25-06-20 14:47:43, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The driver started using readl/writel, which are defined in linux/io.h,
> so this needs to be included here:
> 
> drivers/gpu/drm/msm/dp/dp_panel.c:33:9: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>    33 |         return readl_relaxed(panel->link_base + offset);
> 
> Fixes: 9d47325ee063 ("drm/msm/dp: drop the msm_dp_catalog module")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Abel Vesa <abel.vesa@linaro.org>