drm/draw: fix color truncation in drm_draw_fill24

The color parameter passed to drm_draw_fill24() was truncated to 16
bits, leading to an incorrect color drawn to the target iosys_map.
Fix this behavior, widening the parameter to 32 bits.

Fixes: 31fa2c1 ("drm/panic: Move drawing functions to drm_draw")

Signed-off-by: Francesco Valla <francesco@valla.it>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20251003-drm_draw_fill24_fix-v1-1-8fb7c1c2a893@valla.it
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>

Author: WallaceIT

drivers/gpu/drm/drm_draw.c

@@ -127,7 +127,7 @@ EXPORT_SYMBOL(drm_draw_fill16);
 
 void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
 		     unsigned int height, unsigned int width,
-		     u16 color)
+		     u32 color)
 {
 	unsigned int y, x;
 

drivers/gpu/drm/drm_draw_internal.h

@@ -47,7 +47,7 @@ void drm_draw_fill16(struct iosys_map *dmap, unsigned int dpitch,
 
 void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
 		     unsigned int height, unsigned int width,
-		     u16 color);
+		     u32 color);
 
 void drm_draw_fill32(struct iosys_map *dmap, unsigned int dpitch,
 		     unsigned int height, unsigned int width,