video/vga: Add VGA_IS0_R

Add a proper name for the "Input status register 0" IO address.
Currently we have some code that does reads using the aliasing
VGA_MSR_W define, making it unclear what register we're
actually reading.

v2: Remove stray '?'

Cc: Helge Deller <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251209075549.14051-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Helge Deller <deller@gmx.de>

diff --git a/include/video/vga.h b/include/video/vga.h
index 468764d6727ae02a3af5b5bab2dfd9e6a511a5b6..2f13c371800b3ac1ef0dedd2c0d0d5dd7f1cfba2 100644 (file)
--- a/include/video/vga.h
+++ b/include/video/vga.h
@@ -46,6 +46,7 @@
 #define VGA_MIS_R      0x3CC   /* Misc Output Read Register */
 #define VGA_MIS_W      0x3C2   /* Misc Output Write Register */
 #define VGA_FTC_R      0x3CA   /* Feature Control Read Register */
+#define VGA_IS0_R      0x3C2   /* Input Status Register 0 */
 #define VGA_IS1_RC     0x3DA   /* Input Status Register 1 - color emulation */
 #define VGA_IS1_RM     0x3BA   /* Input Status Register 1 - mono emulation */
 #define VGA_PEL_D      0x3C9   /* PEL Data Register */