Commit da62e71d authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: dma: Make PVR2 DMA configurable. 



With arch/sh/drivers/dma/ always being built, the Dreamcast DMA engines
are being unconditionally built in, regardless of whether the DMA API is
enabled or not. This is a regression from previous behaviour, but there
is not much advantage in building them all in unconditionally regardless.
Add a new config option to make it optional, and update the only user of
it to reflect that.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 988f831d

arch/sh/drivers/dma/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -54,4 +54,17 @@ config SH_DMABRG 
	  of the SH7760.

	  Say Y if you want to use Audio/USB DMA on your SH7760 board.



config PVR2_DMA

	tristate "PowerVR 2 DMAC support"

	depends on SH_DREAMCAST && SH_DMA

	help

	  Selecting this will enable support for the PVR2 DMA controller.

	  As this chains off of the on-chip DMAC, that must also be

	  enabled by default.



	  This is primarily used by the pvr2fb framebuffer driver for

	  certain optimizations, but is not necessary for functionality.



	  If in doubt, say N.



endmenu

arch/sh/drivers/dma/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -4,5 +4,6 @@ 


obj-$(CONFIG_SH_DMA_API)	+= dma-api.o dma-sysfs.o

obj-$(CONFIG_SH_DMA)		+= dma-sh.o

obj-$(CONFIG_SH_DREAMCAST)	+= dma-pvr2.o dma-g2.o

obj-$(CONFIG_SH_DREAMCAST)	+= dma-g2.o

obj-$(CONFIG_PVR2_DMA)		+= dma-pvr2.o

obj-$(CONFIG_SH_DMABRG)		+= dmabrg.o

drivers/video/pvr2fb.c

+8 −8
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ 
#include <mach-dreamcast/mach/sysasic.h>

#endif



#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

#include <linux/pagemap.h>

#include <mach/dma.h>

#include <asm/dma.h>
@@ -188,7 +188,7 @@ static unsigned int is_blanked = 0; /* Is the screen blanked? */ 
static unsigned long pvr2fb_map;

#endif



#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

static unsigned int shdma = PVR2_CASCADE_CHAN;

static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS;

#endif
@@ -207,7 +207,7 @@ static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id); 
static int pvr2_init_cable(void);

static int pvr2_get_param(const struct pvr2_params *p, const char *s,

                            int val, int size);

#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,

			    size_t count, loff_t *ppos);

#endif
@@ -218,7 +218,7 @@ static struct fb_ops pvr2fb_ops = { 
	.fb_blank	= pvr2fb_blank,

	.fb_check_var	= pvr2fb_check_var,

	.fb_set_par	= pvr2fb_set_par,

#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

	.fb_write	= pvr2fb_write,

#endif

	.fb_fillrect	= cfb_fillrect,
@@ -671,7 +671,7 @@ static int pvr2_init_cable(void) 
	return cable_type;

}



#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,

			    size_t count, loff_t *ppos)

{
@@ -743,7 +743,7 @@ out_unmap: 


	return ret;

}

#endif /* CONFIG_SH_DMA */

#endif /* CONFIG_PVR2_DMA */



/**

 * pvr2fb_common_init
@@ -893,7 +893,7 @@ static int __init pvr2fb_dc_init(void) 
		return -EBUSY;

	}



#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

	if (request_dma(pvr2dma, "pvr2") != 0) {

		free_irq(HW_EVENT_VSYNC, 0);

		return -EBUSY;
@@ -915,7 +915,7 @@ static void __exit pvr2fb_dc_exit(void) 
	}



	free_irq(HW_EVENT_VSYNC, 0);

#ifdef CONFIG_SH_DMA

#ifdef CONFIG_PVR2_DMA

	free_dma(pvr2dma);

#endif

}

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