Commit e078d8d6 authored by Mikko Perttunen's avatar Mikko Perttunen Committed by Thierry Reding
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drm/tegra: falcon: Set DMACTX field on DMA transactions 



The DMACTX field determines which context, as specified in the
TRANSCFG register, is used. While during boot it doesn't matter
which is used, later on it matters and this value is reused by
the firmware.

Signed-off-by: default avatarMikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 24862547

drivers/gpu/drm/tegra/falcon.c

+8 −0
Original line number Diff line number Diff line
@@ -48,6 +48,14 @@ static int falcon_copy_chunk(struct falcon *falcon, 
	if (target == FALCON_MEMORY_IMEM)

		cmd |= FALCON_DMATRFCMD_IMEM;



	/*

	 * Use second DMA context (i.e. the one for firmware). Strictly

	 * speaking, at this point both DMA contexts point to the firmware

	 * stream ID, but this register's value will be reused by the firmware

	 * for later DMA transactions, so we need to use the correct value.

	 */

	cmd |= FALCON_DMATRFCMD_DMACTX(1);



	falcon_writel(falcon, offset, FALCON_DMATRFMOFFS);

	falcon_writel(falcon, base, FALCON_DMATRFFBOFFS);

	falcon_writel(falcon, cmd, FALCON_DMATRFCMD);

drivers/gpu/drm/tegra/falcon.h

+1 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ 
#define FALCON_DMATRFCMD_IDLE			(1 << 1)

#define FALCON_DMATRFCMD_IMEM			(1 << 4)

#define FALCON_DMATRFCMD_SIZE_256B		(6 << 8)

#define FALCON_DMATRFCMD_DMACTX(v)		(((v) & 0x7) << 12)



#define FALCON_DMATRFFBOFFS			0x0000111c