iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/bridge: cdns-dsi: Add support for pre_enable and post_enable control functions.

Browse Source 
Add support for pre_enable and post_enable drm bridge control functions.
Making sure that host to be prepared before panel is powered up,
for the panels like TC358762.

Signed-off-by: Jayshri Pawar <jpawar@cadence.com>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220411140606.15654-1-jpawar@cadence.com
This commit is contained in:
Jayshri Pawar 2022-04-11 16:06:06 +02:00 committed by Robert Foss
parent dbb3cd0c81
commit aebeb02dfc
No known key found for this signature in database
GPG Key ID: 3EFD900F76D1D784
1 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/gpu/drm/bridge/cdns-dsi.c
View File

@ -462,6 +462,7 @@ struct cdns_dsi {
struct reset_control *dsi_p_rst;
struct clk *dsi_sys_clk;
bool link_initialized;
bool phy_initialized;
struct phy *dphy;
};
@ -711,11 +712,21 @@ static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
pm_runtime_put(dsi->base.dev);
}
static void cdns_dsi_bridge_post_disable(struct drm_bridge *bridge)
{
struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
struct cdns_dsi *dsi = input_to_dsi(input);
pm_runtime_put(dsi->base.dev);
}
static void cdns_dsi_hs_init(struct cdns_dsi *dsi)
{
struct cdns_dsi_output *output = &dsi->output;
u32 status;
if (dsi->phy_initialized)
return;
/*
* Power all internal DPHY blocks down and maintain their reset line
* asserted before changing the DPHY config.
@ -739,6 +750,7 @@ static void cdns_dsi_hs_init(struct cdns_dsi *dsi)
writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN |
DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB,
dsi->regs + MCTL_DPHY_CFG0);
dsi->phy_initialized = true;
}
static void cdns_dsi_init_link(struct cdns_dsi *dsi)
@ -914,11 +926,25 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
writel(tmp, dsi->regs + MCTL_MAIN_EN);
}
static void cdns_dsi_bridge_pre_enable(struct drm_bridge *bridge)
{
struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
struct cdns_dsi *dsi = input_to_dsi(input);
if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0))
return;
cdns_dsi_init_link(dsi);
cdns_dsi_hs_init(dsi);
}
static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = {
.attach = cdns_dsi_bridge_attach,
.mode_valid = cdns_dsi_bridge_mode_valid,
.disable = cdns_dsi_bridge_disable,
.pre_enable = cdns_dsi_bridge_pre_enable,
.enable = cdns_dsi_bridge_enable,
.post_disable = cdns_dsi_bridge_post_disable,
};
static int cdns_dsi_attach(struct mipi_dsi_host *host,