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

Tomi Valkeinen
2020-11-05T12:05:06Z

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));
+ }
+
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,