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drm/omap: dsi: skip dsi_vc_enable_hs when already in correct mode

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Simplify and optimize dsi_vc_enable_hs() so that it can be called
without checking the current HS/LP mode. Make dsi_vc_enable_hs() return
if the VC is already in the correct mode.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-69-tomi.valkeinen@ti.com
This commit is contained in:
Tomi Valkeinen 2020-12-15 12:46:41 +02:00
parent d58eb31f50
commit 83d74642b0
1 changed files with 4 additions and 6 deletions
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10
drivers/gpu/drm/omapdrm/dss/dsi.c
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@ -341,7 +341,6 @@ struct dsi_data {
int irq;
bool is_enabled;
bool in_lp_mode;
struct clk *dss_clk;
struct regmap *syscon;
@ -2443,6 +2442,9 @@ static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int vc,
DSSDBG("dsi_vc_enable_hs(%d, %d)\n", vc, enable);
if (REG_GET(dsi, DSI_VC_CTRL(vc), 9, 9) == enable)
return;
WARN_ON(!dsi_bus_is_locked(dsi));
dsi_vc_enable(dsi, vc, 0);
@ -2458,8 +2460,6 @@ static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int vc,
/* start the DDR clock by sending a NULL packet */
if (dsi->vm_timings.ddr_clk_always_on && enable)
dsi_vc_send_null(dsi, vc, dsi->dsidev->channel);
dsi->in_lp_mode = !enable;
}
static void dsi_vc_flush_long_data(struct dsi_data *dsi, int vc)
@ -4888,9 +4888,7 @@ static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi, int vc,
struct omap_dss_device *dssdev = &dsi->output;
int r;
if (!!(msg->flags & MIPI_DSI_MSG_USE_LPM) != dsi->in_lp_mode)
dsi_vc_enable_hs(dssdev, vc,
!(msg->flags & MIPI_DSI_MSG_USE_LPM));
dsi_vc_enable_hs(dssdev, vc, !(msg->flags & MIPI_DSI_MSG_USE_LPM));
switch (msg->type) {
case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: