[PATCH] fbdev: i810: include i810_main.h in i810_dvt.c

From: Arnd Bergmann <arnd@arndb.de>

Building with W=1 shows that a header needs to be included to
make the prototypes visible:

drivers/video/fbdev/i810/i810_dvt.c:194:6: error: no previous prototype for 'round_off_xres' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:233:6: error: no previous prototype for 'i810fb_encode_registers' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:245:6: error: no previous prototype for 'i810fb_fill_var_timings' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:279:5: error: no previous prototype for 'i810_get_watermark' [-Werror=missing-prototypes]

Adding the header leads to another warning from a mismatched
prototype, so fix this as well:

drivers/video/fbdev/i810/i810_dvt.c:280:5: error: conflicting types for 'i810_get_watermark'; have 'u32(struct fb_var_screeninfo *,

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/video/fbdev/i810/i810_dvt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/i810/i810_dvt.c b/drivers/video/fbdev/i810/i810_dvt.c
index b4b3670667ab..2082b5c92e8f 100644
--- a/drivers/video/fbdev/i810/i810_dvt.c
+++ b/drivers/video/fbdev/i810/i810_dvt.c

@@ -14,6 +14,7 @@
 
 #include "i810_regs.h"
 #include "i810.h"
+#include "i810_main.h"
 
 struct mode_registers std_modes[] = {
 	/* 640x480 @ 60Hz */

@@ -276,7 +277,7 @@ void i810fb_fill_var_timings(struct fb_var_screeninfo *var)
 	var->upper_margin = total - (yres + var->lower_margin + var->vsync_len);
 }
 
-u32 i810_get_watermark(struct fb_var_screeninfo *var,
+u32 i810_get_watermark(const struct fb_var_screeninfo *var,
 		       struct i810fb_par *par)
 {
 	struct mode_registers *params = &par->regs;

-- 
2.39.2

On Tue, 16 May 2023, Arnd Bergmann [off-list ref] wrote:

From: Arnd Bergmann <arnd@arndb.de>

Building with W=1 shows that a header needs to be included to
make the prototypes visible:

drivers/video/fbdev/i810/i810_dvt.c:194:6: error: no previous prototype for 'round_off_xres' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:233:6: error: no previous prototype for 'i810fb_encode_registers' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:245:6: error: no previous prototype for 'i810fb_fill_var_timings' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:279:5: error: no previous prototype for 'i810_get_watermark' [-Werror=missing-prototypes]

Adding the header leads to another warning from a mismatched
prototype, so fix this as well:

drivers/video/fbdev/i810/i810_dvt.c:280:5: error: conflicting types for 'i810_get_watermark'; have 'u32(struct fb_var_screeninfo *,

Changes here look fine,

Reviewed-by: Jani Nikula <redacted>

but I think you should try CONFIG_FB_I810_GTF=y to get the same
mismatched prototype error for i810_get_watermark() in i810_gtf.c, and
add the const there while at it. R-b stands for that addition as well.

-- 
Jani Nikula, Intel Open Source Graphics Center

On Wed, May 17, 2023, at 10:46, Jani Nikula wrote:

On Tue, 16 May 2023, Arnd Bergmann [off-list ref] wrote:

quoted

drivers/video/fbdev/i810/i810_dvt.c:280:5: error: conflicting types for 'i810_get_watermark'; have 'u32(struct fb_var_screeninfo *,

Changes here look fine,

Reviewed-by: Jani Nikula <redacted>

Thanks!

but I think you should try CONFIG_FB_I810_GTF=y to get the same
mismatched prototype error for i810_get_watermark() in i810_gtf.c, and
add the const there while at it. R-b stands for that addition as well.

I'm fairly sure I looked at that and did not see a problem as
i810_main.h is already included in that file, it was added
in 2006 with commit a0aa7d063927 ("[PATCH] drivers/video/: possible
cleanups").

     Arnd

On Wed, 17 May 2023, "Arnd Bergmann" [off-list ref] wrote:

On Wed, May 17, 2023, at 10:46, Jani Nikula wrote:

quoted

On Tue, 16 May 2023, Arnd Bergmann [off-list ref] wrote:

quoted

quoted

drivers/video/fbdev/i810/i810_dvt.c:280:5: error: conflicting types for 'i810_get_watermark'; have 'u32(struct fb_var_screeninfo *,

Changes here look fine,

Reviewed-by: Jani Nikula <redacted>

Thanks!

quoted

but I think you should try CONFIG_FB_I810_GTF=y to get the same
mismatched prototype error for i810_get_watermark() in i810_gtf.c, and
add the const there while at it. R-b stands for that addition as well.

I'm fairly sure I looked at that and did not see a problem as
i810_main.h is already included in that file, it was added
in 2006 with commit a0aa7d063927 ("[PATCH] drivers/video/: possible
cleanups").

True that, my bad. (Which kind of puts the R-b above in doubt, but hey,
at least I looked at it. ;)

BR,
Jani.

     Arnd

-- 
Jani Nikula, Intel Open Source Graphics Center

On 5/17/23 10:46, Jani Nikula wrote:

On Tue, 16 May 2023, Arnd Bergmann [off-list ref] wrote:

quoted

From: Arnd Bergmann <arnd@arndb.de>

Building with W=1 shows that a header needs to be included to
make the prototypes visible:

drivers/video/fbdev/i810/i810_dvt.c:194:6: error: no previous prototype for 'round_off_xres' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:233:6: error: no previous prototype for 'i810fb_encode_registers' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:245:6: error: no previous prototype for 'i810fb_fill_var_timings' [-Werror=missing-prototypes]
drivers/video/fbdev/i810/i810_dvt.c:279:5: error: no previous prototype for 'i810_get_watermark' [-Werror=missing-prototypes]

Adding the header leads to another warning from a mismatched
prototype, so fix this as well:

drivers/video/fbdev/i810/i810_dvt.c:280:5: error: conflicting types for 'i810_get_watermark'; have 'u32(struct fb_var_screeninfo *,

Changes here look fine,

Reviewed-by: Jani Nikula <redacted>

applied to fbdev tree.

Thanks!
Helge