Re: [PATCH v2] drm/bridge/synopsys: dsi: allow LP commands in video mode

From: Neil Armstrong
Date: Mon Sep 07 2020 - 04:03:10 EST


On 08/07/2020 16:08, Yannick Fertre wrote:
> From: Antonio Borneo <antonio.borneo@xxxxxx>
>
> Current code only sends LP commands in command mode.
>
> Allows sending LP commands also in video mode by setting the
> proper flag in DSI_VID_MODE_CFG.
>
> Signed-off-by: Antonio Borneo <antonio.borneo@xxxxxx>
> ---
> drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> index 1a24ea648ef8..e9a0f42ff99f 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> @@ -89,6 +89,7 @@
> #define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS 0x1
> #define VID_MODE_TYPE_BURST 0x2
> #define VID_MODE_TYPE_MASK 0x3
> +#define ENABLE_LOW_POWER_CMD BIT(15)
> #define VID_MODE_VPG_ENABLE BIT(16)
> #define VID_MODE_VPG_HORIZONTAL BIT(24)
>
> @@ -376,6 +377,13 @@ static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
>
> dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS);
> dsi_write(dsi, DSI_CMD_MODE_CFG, val);
> +
> + val = dsi_read(dsi, DSI_VID_MODE_CFG);
> + if (lpm)
> + val |= ENABLE_LOW_POWER_CMD;
> + else
> + val &= ~ENABLE_LOW_POWER_CMD;
> + dsi_write(dsi, DSI_VID_MODE_CFG, val);
> }
>
> static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
>

Tested on Amlogic AXG (v1.21a)

Acked-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>

Applying to drm-misc-next

Thanks !
Neil