Hi,
On Tue, Jan 03, 2017 at 01:22:34PM +0200, Peter Ujfalusi wrote:
> OMAP1510, OMAP5910 and OMAP310 have only 9 logical channels.
> OMAP1610, OMAP5912, OMAP1710, OMAP730, and OMAP850 have 16 logical channels
> available.
>
> The wired 17 for the lch_count must have been used to cover the 16 + 1
> dedicated LCD channel, in reality we can only use 9 or 16 channels.
>
> The d->chan_count is not used by the omap-dma stack, so we can skip the
> setup. chan_count was configured to the number of logical channels and not
> the actual number of physical channels anyways.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Acked-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
A.
> ---
> arch/arm/mach-omap1/dma.c | 16 +++++++---------
> 1 file changed, 7 insertions(+), 9 deletions(-)
>
> diff --git a/arch/arm/mach-omap1/dma.c b/arch/arm/mach-omap1/dma.c
> index f6ba589cd312..c821c1d5610e 100644
> --- a/arch/arm/mach-omap1/dma.c
> +++ b/arch/arm/mach-omap1/dma.c
> @@ -32,7 +32,6 @@
> #include "soc.h"
>
> #define OMAP1_DMA_BASE (0xfffed800)
> -#define OMAP1_LOGICAL_DMA_CH_COUNT 17
>
> static u32 enable_1510_mode;
>
> @@ -348,8 +347,6 @@ static int __init omap1_system_dma_init(void)
> goto exit_iounmap;
> }
>
> - d->lch_count = OMAP1_LOGICAL_DMA_CH_COUNT;
> -
> /* Valid attributes for omap1 plus processors */
> if (cpu_is_omap15xx())
> d->dev_caps = ENABLE_1510_MODE;
> @@ -366,13 +363,14 @@ static int __init omap1_system_dma_init(void)
> d->dev_caps |= CLEAR_CSR_ON_READ;
> d->dev_caps |= IS_WORD_16;
>
> - if (cpu_is_omap15xx())
> - d->chan_count = 9;
> - else if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
> - if (!(d->dev_caps & ENABLE_1510_MODE))
> - d->chan_count = 16;
> + /* available logical channels */
> + if (cpu_is_omap15xx()) {
> + d->lch_count = 9;
> + } else {
> + if (d->dev_caps & ENABLE_1510_MODE)
> + d->lch_count = 9;
> else
> - d->chan_count = 9;
> + d->lch_count = 16;
> }
>
> p = dma_plat_info;
> --
> 2.11.0
>
> --
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