As per the user manual, look like mod clock is not mandatory for all Allwinner MIPI DSI controllers, it is connected to CLK_DSI_SCLK for A31 and not available in A64.
So add has_mod_clk quirk and process the mod clk accordingly.
Tested-by: Merlijn Wajer merlijn@wizzup.org Signed-off-by: Jagan Teki jagan@amarulasolutions.com --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 38 ++++++++++++++++++-------- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 5 ++++ 2 files changed, 32 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index c958ca9bae63..8c4c541224dd 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -11,6 +11,7 @@ #include <linux/crc-ccitt.h> #include <linux/module.h> #include <linux/of_address.h> +#include <linux/of_device.h> #include <linux/phy/phy-mipi-dphy.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> @@ -1093,6 +1094,7 @@ static int sun6i_dsi_probe(struct platform_device *pdev) dsi->dev = dev; dsi->host.ops = &sun6i_dsi_host_ops; dsi->host.dev = dev; + dsi->variant = of_device_get_match_data(dev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(dev, res); @@ -1120,17 +1122,20 @@ static int sun6i_dsi_probe(struct platform_device *pdev) return PTR_ERR(dsi->reset); }
- dsi->mod_clk = devm_clk_get(dev, "mod"); - if (IS_ERR(dsi->mod_clk)) { - dev_err(dev, "Couldn't get the DSI mod clock\n"); - return PTR_ERR(dsi->mod_clk); + if (dsi->variant->has_mod_clk) { + dsi->mod_clk = devm_clk_get(dev, "mod"); + if (IS_ERR(dsi->mod_clk)) { + dev_err(dev, "Couldn't get the DSI mod clock\n"); + return PTR_ERR(dsi->mod_clk); + } }
/* * In order to operate properly, that clock seems to be always * set to 297MHz. */ - clk_set_rate_exclusive(dsi->mod_clk, 297000000); + if (dsi->variant->has_mod_clk) + clk_set_rate_exclusive(dsi->mod_clk, 297000000);
dsi->dphy = devm_phy_get(dev, "dphy"); if (IS_ERR(dsi->dphy)) { @@ -1160,7 +1165,8 @@ static int sun6i_dsi_probe(struct platform_device *pdev) err_pm_disable: pm_runtime_disable(dev); err_unprotect_clk: - clk_rate_exclusive_put(dsi->mod_clk); + if (dsi->variant->has_mod_clk) + clk_rate_exclusive_put(dsi->mod_clk); return ret; }
@@ -1172,7 +1178,8 @@ static int sun6i_dsi_remove(struct platform_device *pdev) component_del(&pdev->dev, &sun6i_dsi_ops); mipi_dsi_host_unregister(&dsi->host); pm_runtime_disable(dev); - clk_rate_exclusive_put(dsi->mod_clk); + if (dsi->variant->has_mod_clk) + clk_rate_exclusive_put(dsi->mod_clk);
return 0; } @@ -1189,7 +1196,8 @@ static int __maybe_unused sun6i_dsi_runtime_resume(struct device *dev) }
reset_control_deassert(dsi->reset); - clk_prepare_enable(dsi->mod_clk); + if (dsi->variant->has_mod_clk) + clk_prepare_enable(dsi->mod_clk);
/* * Enable the DSI block. @@ -1217,7 +1225,8 @@ static int __maybe_unused sun6i_dsi_runtime_suspend(struct device *dev) { struct sun6i_dsi *dsi = dev_get_drvdata(dev);
- clk_disable_unprepare(dsi->mod_clk); + if (dsi->variant->has_mod_clk) + clk_disable_unprepare(dsi->mod_clk); reset_control_assert(dsi->reset); regulator_disable(dsi->regulator);
@@ -1230,9 +1239,16 @@ static const struct dev_pm_ops sun6i_dsi_pm_ops = { NULL) };
+static const struct sun6i_dsi_variant sun6i_a31_mipi_dsi = { + .has_mod_clk = true, +}; + static const struct of_device_id sun6i_dsi_of_table[] = { - { .compatible = "allwinner,sun6i-a31-mipi-dsi" }, - { } + { + .compatible = "allwinner,sun6i-a31-mipi-dsi", + .data = &sun6i_a31_mipi_dsi, + }, + { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sun6i_dsi_of_table);
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h index 3f4846f581ef..d791c9f6fccf 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h @@ -15,6 +15,10 @@
#define SUN6I_DSI_TCON_DIV 4
+struct sun6i_dsi_variant { + bool has_mod_clk; +}; + struct sun6i_dsi { struct drm_connector connector; struct drm_encoder encoder; @@ -31,6 +35,7 @@ struct sun6i_dsi { struct sun4i_drv *drv; struct mipi_dsi_device *device; struct drm_panel *panel; + const struct sun6i_dsi_variant *variant; };
static inline struct sun6i_dsi *host_to_sun6i_dsi(struct mipi_dsi_host *host)