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SubjectRe: [PATCH 04/10] drm: bridge: it66121: Write AVI infoframe with regmap_bulk_write()
On Wed, 14 Dec 2022 at 13:58, Paul Cercueil <paul@crapouillou.net> wrote:
>
> Since all AVI infoframe registers are contiguous in the address space,
> the AVI infoframe can be written in one go with regmap_bulk_write().
>
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
> drivers/gpu/drm/bridge/ite-it66121.c | 27 +++++++--------------------
> 1 file changed, 7 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
> index 12222840df30..0a4fdfd7af44 100644
> --- a/drivers/gpu/drm/bridge/ite-it66121.c
> +++ b/drivers/gpu/drm/bridge/ite-it66121.c
> @@ -773,24 +773,9 @@ void it66121_bridge_mode_set(struct drm_bridge *bridge,
> const struct drm_display_mode *mode,
> const struct drm_display_mode *adjusted_mode)
> {
> - int ret, i;
> u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
> struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
> - const u16 aviinfo_reg[HDMI_AVI_INFOFRAME_SIZE] = {
> - IT66121_AVIINFO_DB1_REG,
> - IT66121_AVIINFO_DB2_REG,
> - IT66121_AVIINFO_DB3_REG,
> - IT66121_AVIINFO_DB4_REG,
> - IT66121_AVIINFO_DB5_REG,
> - IT66121_AVIINFO_DB6_REG,
> - IT66121_AVIINFO_DB7_REG,
> - IT66121_AVIINFO_DB8_REG,
> - IT66121_AVIINFO_DB9_REG,
> - IT66121_AVIINFO_DB10_REG,
> - IT66121_AVIINFO_DB11_REG,
> - IT66121_AVIINFO_DB12_REG,
> - IT66121_AVIINFO_DB13_REG
> - };
> + int ret;
>
> mutex_lock(&ctx->lock);
>
> @@ -810,10 +795,12 @@ void it66121_bridge_mode_set(struct drm_bridge *bridge,
> }
>
> /* Write new AVI infoframe packet */
> - for (i = 0; i < HDMI_AVI_INFOFRAME_SIZE; i++) {
> - if (regmap_write(ctx->regmap, aviinfo_reg[i], buf[i + HDMI_INFOFRAME_HEADER_SIZE]))
> - goto unlock;
> - }
> + ret = regmap_bulk_write(ctx->regmap, IT66121_AVIINFO_DB1_REG,
> + &buf[HDMI_INFOFRAME_HEADER_SIZE],
> + HDMI_AVI_INFOFRAME_SIZE);
> + if (ret)
> + goto unlock;
> +
> if (regmap_write(ctx->regmap, IT66121_AVIINFO_CSUM_REG, buf[3]))
> goto unlock;
>
> --
> 2.35.1
>

Reviewed-by: Robert Foss <robert.foss@linaro.org>

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