linux-kernel - [RFC v2 36/39] video: handle HAS

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Date:   Fri, 29 Apr 2022 15:51:04 +0200
From:   Niklas Schnelle <schnelle@...ux.ibm.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-pci@...r.kernel.org, Arnd Bergmann <arnd@...nel.org>,
        Helge Deller <deller@....de>,
        linux-fbdev@...r.kernel.org (open list:FRAMEBUFFER LAYER),
        dri-devel@...ts.freedesktop.org (open list:FRAMEBUFFER LAYER)
Subject: [RFC v2 36/39] video: handle HAS_IOPORT dependencies

In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. We thus need to add HAS_IOPORT as dependency for
those drivers using them and guard inline code in headers.

Co-developed-by: Arnd Bergmann <arnd@...nel.org>
Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
---
 drivers/video/fbdev/Kconfig | 25 +++++++++++++------------
 include/video/vga.h         |  8 ++++++++
 2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 93b8d84c34cf..e7d27c0602d5 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -343,7 +343,7 @@ config FB_IMX
 
 config FB_CYBER2000
 	tristate "CyberPro 2000/2010/5000 support"
-	depends on FB && PCI && (BROKEN || !SPARC64)
+	depends on FB && PCI && HAS_IOPORT && (BROKEN || !SPARC64)
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -436,6 +436,7 @@ config FB_FM2
 config FB_ARC
 	tristate "Arc Monochrome LCD board support"
 	depends on FB && (X86 || COMPILE_TEST)
+	depends on HAS_IOPORT
 	select FB_SYS_FILLRECT
 	select FB_SYS_COPYAREA
 	select FB_SYS_IMAGEBLIT
@@ -1242,7 +1243,7 @@ config FB_RADEON_DEBUG
 
 config FB_ATY128
 	tristate "ATI Rage128 display support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1265,7 +1266,7 @@ config FB_ATY128_BACKLIGHT
 
 config FB_ATY
 	tristate "ATI Mach64 display support" if PCI || ATARI
-	depends on FB && !SPARC32
+	depends on FB && HAS_IOPORT && !SPARC32
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1315,7 +1316,7 @@ config FB_ATY_BACKLIGHT
 
 config FB_S3
 	tristate "S3 Trio/Virge support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1374,7 +1375,7 @@ config FB_SAVAGE_ACCEL
 
 config FB_SIS
 	tristate "SiS/XGI display support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1404,7 +1405,7 @@ config FB_SIS_315
 
 config FB_VIA
 	tristate "VIA UniChrome (Pro) and Chrome9 display support"
-	depends on FB && PCI && GPIOLIB && I2C && (X86 || COMPILE_TEST)
+	depends on FB && PCI && GPIOLIB && I2C && HAS_IOPORT && (X86 || COMPILE_TEST)
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1442,7 +1443,7 @@ endif
 
 config FB_NEOMAGIC
 	tristate "NeoMagic display support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_MODE_HELPERS
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
@@ -1470,7 +1471,7 @@ config FB_KYRO
 
 config FB_3DFX
 	tristate "3Dfx Banshee/Voodoo3/Voodoo5 display support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_IMAGEBLIT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
@@ -1518,7 +1519,7 @@ config FB_VOODOO1
 
 config FB_VT8623
 	tristate "VIA VT8623 support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1532,7 +1533,7 @@ config FB_VT8623
 
 config FB_TRIDENT
 	tristate "Trident/CyberXXX/CyberBlade support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -1554,7 +1555,7 @@ config FB_TRIDENT
 
 config FB_ARK
 	tristate "ARK 2000PV support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -2226,7 +2227,7 @@ config FB_SSD1307
 
 config FB_SM712
 	tristate "Silicon Motion SM712 framebuffer support"
-	depends on FB && PCI
+	depends on FB && PCI && HAS_IOPORT
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
diff --git a/include/video/vga.h b/include/video/vga.h
index d334e64c1c19..53cb52c0fddb 100644
--- a/include/video/vga.h
+++ b/include/video/vga.h
@@ -201,18 +201,26 @@ extern int restore_vga(struct vgastate *state);
  
 static inline unsigned char vga_io_r (unsigned short port)
 {
+#ifdef CONFIG_HAS_IOPORT
 	return inb_p(port);
+#else
+	return 0xff;
+#endif
 }
 
 static inline void vga_io_w (unsigned short port, unsigned char val)
 {
+#ifdef CONFIG_HAS_IOPORT
 	outb_p(val, port);
+#endif
 }
 
 static inline void vga_io_w_fast (unsigned short port, unsigned char reg,
 				  unsigned char val)
 {
+#ifdef CONFIG_HAS_IOPORT
 	outw(VGA_OUT16VAL (val, reg), port);
+#endif
 }
 
 static inline unsigned char vga_mm_r (void __iomem *regbase, unsigned short port)
-- 
2.32.0