Re: [PATCHv3 1/2] drm/omap: use regmap_update_bit() when muxing DSI pads

Laurent Pinchart
2017-08-10T13:22:52Z

Hi Tomi,

Thank you for the patch.

On Thursday 10 Aug 2017 15:29:44 Tomi Valkeinen wrote:
> Use regmap_update_bits instead of regmap_read/write, which simplifies
> the code.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> drivers/gpu/drm/omapdrm/dss/dsi.c | 15 +++------------
> 1 file changed, 3 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c
> b/drivers/gpu/drm/omapdrm/dss/dsi.c index a66d2b1a6c74..1855d69b211d 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -2107,7 +2107,6 @@ static int dsi_omap4_mux_pads(struct dsi_data *dsi,
> unsigned int lanes) {
> u32 enable_mask, enable_shift;
> u32 pipd_mask, pipd_shift;
> - u32 reg;
>
> if (!dsi->syscon)
> return 0;
> @@ -2126,17 +2125,9 @@ static int dsi_omap4_mux_pads(struct dsi_data *dsi,
> unsigned int lanes) return -ENODEV;
> }
>
> - regmap_read(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET, &reg);
> -
> - reg &= ~enable_mask;
> - reg &= ~pipd_mask;
> -
> - reg |= (lanes << enable_shift) & enable_mask;
> - reg |= (lanes << pipd_shift) & pipd_mask;
> -
> - regmap_write(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET, reg);
> -
> - return 0;
> + return regmap_update_bits(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET,
> + enable_mask | pipd_mask,
> + (lanes << enable_shift) | (lanes << pipd_shift));
> }
>
> static int dsi_enable_pads(struct dsi_data *dsi, unsigned int lane_mask)

--
Regards,

Laurent Pinchart