Re: [PATCH v3 24/56] drm/omap: dsi: lp/hs switching support for transfer()

Laurent Pinchart
2020-11-09T08:53:13Z

Hi Tomi and Sebastian,

Thank you for the patch.

On Thu, Nov 05, 2020 at 02:03:01PM +0200, Tomi Valkeinen wrote:
> From: Sebastian Reichel <sebastian.reichel@collabora.com>
>
> Integrate low-power / high-speed bus switching into transfer
> function and drop the omapdrm specific enable_hs() callback.
>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
> drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 6 +++---
> drivers/gpu/drm/omapdrm/dss/dsi.c | 10 ++++++++--
> drivers/gpu/drm/omapdrm/dss/omapdss.h | 2 --
> 3 files changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> index 1e742cf798b6..8890ee2ba830 100644
> --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> @@ -269,7 +269,7 @@ static int dsicm_exit_ulps(struct panel_drv_data *ddata)
> return 0;
>
> src->ops->enable(src);
> - src->ops->dsi.enable_hs(src, ddata->dsi->channel, true);
> + ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
>
> r = _dsicm_enable_te(ddata, true);
> if (r) {
> @@ -574,7 +574,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
>
> dsicm_hw_reset(ddata);
>
> - src->ops->dsi.enable_hs(src, ddata->dsi->channel, false);
> + ddata->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
>
> r = dsicm_sleep_out(ddata);
> if (r)
> @@ -617,7 +617,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
> ddata->intro_printed = true;
> }
>
> - src->ops->dsi.enable_hs(src, ddata->dsi->channel, true);
> + ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
>
> return 0;
> err:
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index e341aca92462..003d26cead5a 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -329,6 +329,7 @@ struct dsi_data {
> int irq;
>
> bool is_enabled;
> + bool in_lp_mode;
>
> struct clk *dss_clk;
> struct regmap *syscon;
> @@ -2431,6 +2432,8 @@ static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
> /* start the DDR clock by sending a NULL packet */
> if (dsi->vm_timings.ddr_clk_always_on && enable)
> dsi_vc_send_null(dsi, channel);
> +
> + dsi->in_lp_mode = !enable;
> }
>
> static void dsi_vc_flush_long_data(struct dsi_data *dsi, int channel)
> @@ -4693,6 +4696,11 @@ static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host,
> struct dsi_data *dsi = host_to_omap(host);
> struct omap_dss_device *dssdev = &dsi->output;
>
> + if (!!(msg->flags & MIPI_DSI_MSG_USE_LPM) != dsi->in_lp_mode) {
> + dsi_vc_enable_hs(dssdev, msg->channel,
> + !(msg->flags & MIPI_DSI_MSG_USE_LPM));
> + }

No need for curly brackets.

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

> +
> switch (msg->type) {
> case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
> case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
> @@ -4753,8 +4761,6 @@ static const struct omap_dss_device_ops dsi_ops = {
>
> .disable = dsi_display_disable,
>
> - .enable_hs = dsi_vc_enable_hs,
> -
> .set_config = dsi_set_config,
>
> .enable_video_output = dsi_enable_video_output,
> diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> index 9bbd2c0f3187..2d44a8e32fcc 100644
> --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
> +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> @@ -288,8 +288,6 @@ struct omapdss_dsi_ops {
> int (*set_config)(struct omap_dss_device *dssdev,
> const struct omap_dss_dsi_config *cfg);
>
> - void (*enable_hs)(struct omap_dss_device *dssdev, int channel,
> - bool enable);
> int (*enable_te)(struct omap_dss_device *dssdev, bool enable);
>
> int (*update)(struct omap_dss_device *dssdev, int channel,

--
Regards,

Laurent Pinchart