Hi Andrzej,
On 06/08/2018 08:04 AM, Andrzej Hajda wrote:
> There is no need to flip reset pin twice. Also delays can be changed to
> values present in vendor's code.
>
> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Reviewed-by: Maciej Purski <m.purski@xxxxxxxxxxx>
> ---
> Hi,
>
> This is v2 of forgotten patch, awaiting reviewers, any volunteers.
> Also "drm/bridge/sii8620: fix loops in EDID fetch logic" waits for reviewers.
>
> In this version I have completely removed reset function, and moved its body
> to sii8620_hw_on.
>
> Regards
> Andrzej
> ---
> drivers/gpu/drm/bridge/sil-sii8620.c | 23 ++++++++++-------------
> 1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
> index 7ab36042a822..d1e780fba4b6 100644
> --- a/drivers/gpu/drm/bridge/sil-sii8620.c
> +++ b/drivers/gpu/drm/bridge/sil-sii8620.c
> @@ -971,8 +971,17 @@ static int sii8620_hw_on(struct sii8620 *ctx)
> ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> if (ret)
> return ret;
> +
> usleep_range(10000, 20000);
> - return clk_prepare_enable(ctx->clk_xtal);
> + ret = clk_prepare_enable(ctx->clk_xtal);
> + if (ret)
> + return ret;
> +
> + msleep(100);
> + gpiod_set_value(ctx->gpio_reset, 0);
> + msleep(100);
> +
> + return 0;
> }
>
> static int sii8620_hw_off(struct sii8620 *ctx)
> @@ -982,17 +991,6 @@ static int sii8620_hw_off(struct sii8620 *ctx)
> return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> }
>
> -static void sii8620_hw_reset(struct sii8620 *ctx)
> -{
> - usleep_range(10000, 20000);
> - gpiod_set_value(ctx->gpio_reset, 0);
> - usleep_range(5000, 20000);
> - gpiod_set_value(ctx->gpio_reset, 1);
> - usleep_range(10000, 20000);
> - gpiod_set_value(ctx->gpio_reset, 0);
> - msleep(300);
> -}
> -
> static void sii8620_cbus_reset(struct sii8620 *ctx)
> {
> sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
> @@ -2112,7 +2110,6 @@ static void sii8620_cable_in(struct sii8620 *ctx)
> dev_err(dev, "Error powering on, %d.\n", ret);
> return;
> }
> - sii8620_hw_reset(ctx);
>
> sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver));
> ret = sii8620_clear_error(ctx);
>
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