linux-kernel - [PATCH 6/6] ARM: omap1: add back omap_set_dma

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Message-Id: <20220428133210.990808-7-arnd@kernel.org>
Date:   Thu, 28 Apr 2022 15:31:58 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     tony@...mide.com, jmkrzyszt@...il.com, aaro.koskinen@....fi,
        vireshk@...nel.org, shiraz.linux.kernel@...il.com, nsekhar@...com,
        brgl@...ev.pl, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH 6/6] ARM: omap1: add back omap_set_dma_priority() stub

From: Arnd Bergmann <arnd@...db.de>

One of my multiplatform patches went a little too far and removed
a declaration that is needed for compile-testing the omapfb
driver on non-OMAP1 platforms:

  arm-linux-gnueabi-ld: drivers/video/fbdev/omap/omapfb_main.o: in function `omapfb_do_probe':
  omapfb_main.c:(.text+0x41ec): undefined reference to `omap_set_dma_priority'

Add back the inline stub, and in turn hide the definition when
omapfb is disabled, like we do for the usb specific bits.

Reported-by: kernel test robot <lkp@...el.com>
Fixes: 52ef8efcb75e ("dma: omap: hide legacy interface")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm/mach-omap1/omap-dma.c | 18 ++----------------
 include/linux/omap-dma.h       |  7 +++++++
 2 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/arch/arm/mach-omap1/omap-dma.c b/arch/arm/mach-omap1/omap-dma.c
index e504f65cdc1b..f7e62de427f3 100644
--- a/arch/arm/mach-omap1/omap-dma.c
+++ b/arch/arm/mach-omap1/omap-dma.c
@@ -99,7 +99,7 @@ static inline void set_gdma_dev(int req, int dev)
 	omap_writel(l, reg);
 }
 
-#ifdef CONFIG_ARCH_OMAP1
+#if IS_ENABLED(CONFIG_FB_OMAP)
 void omap_set_dma_priority(int lch, int dst_port, int priority)
 {
 	unsigned long reg;
@@ -129,22 +129,8 @@ void omap_set_dma_priority(int lch, int dst_port, int priority)
 		omap_writel(l, reg);
 	}
 }
-#endif
-
-#ifdef CONFIG_ARCH_OMAP2PLUS
-void omap_set_dma_priority(int lch, int dst_port, int priority)
-{
-	u32 ccr;
-
-	ccr = p->dma_read(CCR, lch);
-	if (priority)
-		ccr |= (1 << 6);
-	else
-		ccr &= ~(1 << 6);
-	p->dma_write(ccr, CCR, lch);
-}
-#endif
 EXPORT_SYMBOL(omap_set_dma_priority);
+#endif
 
 #if IS_ENABLED(CONFIG_USB_OMAP)
 #ifdef CONFIG_ARCH_OMAP15XX
diff --git a/include/linux/omap-dma.h b/include/linux/omap-dma.h
index 254b4e10511b..6f6c31e3fb93 100644
--- a/include/linux/omap-dma.h
+++ b/include/linux/omap-dma.h
@@ -294,7 +294,14 @@ struct omap_system_dma_plat_info {
 
 extern struct omap_system_dma_plat_info *omap_get_plat_info(void);
 
+#if defined(CONFIG_ARCH_OMAP1)
 extern void omap_set_dma_priority(int lch, int dst_port, int priority);
+#else
+static inline void omap_set_dma_priority(int lch, int dst_port, int priority)
+{
+}
+#endif
+
 extern int omap_request_dma(int dev_id, const char *dev_name,
 			void (*callback)(int lch, u16 ch_status, void *data),
 			void *data, int *dma_ch);
-- 
2.29.2