Commit aebeb02d authored by Jayshri Pawar's avatar Jayshri Pawar Committed by Robert Foss

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

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: default avatarJayshri Pawar <jpawar@cadence.com>
Reviewed-by: default avatarRobert Foss <robert.foss@linaro.org>
Signed-off-by: default avatarRobert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220411140606.15654-1-jpawar@cadence.com
parent dbb3cd0c
...@@ -462,6 +462,7 @@ struct cdns_dsi { ...@@ -462,6 +462,7 @@ struct cdns_dsi {
struct reset_control *dsi_p_rst; struct reset_control *dsi_p_rst;
struct clk *dsi_sys_clk; struct clk *dsi_sys_clk;
bool link_initialized; bool link_initialized;
bool phy_initialized;
struct phy *dphy; struct phy *dphy;
}; };
...@@ -711,11 +712,21 @@ static void cdns_dsi_bridge_disable(struct drm_bridge *bridge) ...@@ -711,11 +712,21 @@ static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
pm_runtime_put(dsi->base.dev); 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) static void cdns_dsi_hs_init(struct cdns_dsi *dsi)
{ {
struct cdns_dsi_output *output = &dsi->output; struct cdns_dsi_output *output = &dsi->output;
u32 status; u32 status;
if (dsi->phy_initialized)
return;
/* /*
* Power all internal DPHY blocks down and maintain their reset line * Power all internal DPHY blocks down and maintain their reset line
* asserted before changing the DPHY config. * asserted before changing the DPHY config.
...@@ -739,6 +750,7 @@ static void cdns_dsi_hs_init(struct cdns_dsi *dsi) ...@@ -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 | writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN |
DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB, DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB,
dsi->regs + MCTL_DPHY_CFG0); dsi->regs + MCTL_DPHY_CFG0);
dsi->phy_initialized = true;
} }
static void cdns_dsi_init_link(struct cdns_dsi *dsi) static void cdns_dsi_init_link(struct cdns_dsi *dsi)
...@@ -914,11 +926,25 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge) ...@@ -914,11 +926,25 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
writel(tmp, dsi->regs + MCTL_MAIN_EN); 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 = { static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = {
.attach = cdns_dsi_bridge_attach, .attach = cdns_dsi_bridge_attach,
.mode_valid = cdns_dsi_bridge_mode_valid, .mode_valid = cdns_dsi_bridge_mode_valid,
.disable = cdns_dsi_bridge_disable, .disable = cdns_dsi_bridge_disable,
.pre_enable = cdns_dsi_bridge_pre_enable,
.enable = cdns_dsi_bridge_enable, .enable = cdns_dsi_bridge_enable,
.post_disable = cdns_dsi_bridge_post_disable,
}; };
static int cdns_dsi_attach(struct mipi_dsi_host *host, static int cdns_dsi_attach(struct mipi_dsi_host *host,
......
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