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| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2020-12-15 12:46:41 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2020-12-15 16:17:31 +0200 |
| commit | 83d74642b0c894e7da04295eeb82a3e1589acbcc (patch) | |
| tree | 75b6edf0dd501597f49aaead18f189e68f453f7e /drivers/gpu/drm/omapdrm | |
| parent | d58eb31f50cb619c60172d752a87f2a00e9f54ed (diff) | |
| download | lwn-83d74642b0c894e7da04295eeb82a3e1589acbcc.tar.gz lwn-83d74642b0c894e7da04295eeb82a3e1589acbcc.zip | |
drm/omap: dsi: skip dsi_vc_enable_hs when already in correct mode
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
Diffstat (limited to 'drivers/gpu/drm/omapdrm')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/dsi.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index 9499e424ec90..6d97ca018a62 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -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: |