OMAP3: DMA: Enable idlemodes for DMA OCP (aecedb94) · Commits · 戴 / test

arch/arm/plat-omap/dma.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -2457,6 +2457,19 @@ static int __init omap_init_dma(void)
		setup_irq(irq, &omap24xx_dma_irq);
		}

		/* Enable smartidle idlemodes and autoidle */
		if (cpu_is_omap34xx()) {
		u32 v = dma_read(OCP_SYSCONFIG);
		v &= ~(DMA_SYSCONFIG_MIDLEMODE_MASK \|
		DMA_SYSCONFIG_SIDLEMODE_MASK \|
		DMA_SYSCONFIG_AUTOIDLE);
		v \|= (DMA_SYSCONFIG_MIDLEMODE(DMA_IDLEMODE_SMARTIDLE) \|
		DMA_SYSCONFIG_SIDLEMODE(DMA_IDLEMODE_SMARTIDLE) \|
		DMA_SYSCONFIG_AUTOIDLE);
		dma_write(v , OCP_SYSCONFIG);
		}


		/* FIXME: Update LCD DMA to work on 24xx */
		if (cpu_class_is_omap1()) {
		r = request_irq(INT_DMA_LCD, lcd_dma_irq_handler, 0,

+15 −0

Original line number	Diff line number	Diff line
		@@ -389,6 +389,21 @@
		#define DMA_THREAD_FIFO_25 (0x02 << 14)
		#define DMA_THREAD_FIFO_50 (0x03 << 14)

		/* DMA4_OCP_SYSCONFIG bits */
		#define DMA_SYSCONFIG_MIDLEMODE_MASK (3 << 12)
		#define DMA_SYSCONFIG_CLOCKACTIVITY_MASK (3 << 8)
		#define DMA_SYSCONFIG_EMUFREE (1 << 5)
		#define DMA_SYSCONFIG_SIDLEMODE_MASK (3 << 3)
		#define DMA_SYSCONFIG_SOFTRESET (1 << 2)
		#define DMA_SYSCONFIG_AUTOIDLE (1 << 0)

		#define DMA_SYSCONFIG_MIDLEMODE(n) ((n) << 12)
		#define DMA_SYSCONFIG_SIDLEMODE(n) ((n) << 3)

		#define DMA_IDLEMODE_SMARTIDLE 0x2
		#define DMA_IDLEMODE_NO_IDLE 0x1
		#define DMA_IDLEMODE_FORCE_IDLE 0x0

		/* Chaining modes*/
		#ifndef CONFIG_ARCH_OMAP1
		#define OMAP_DMA_STATIC_CHAIN 0x1