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 clk accordingly. Signed-off-by: Jagan Teki <[email protected]> Tested-by: Merlijn Wajer <[email protected]> --- 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 f42ea806f6c8..2a63e96aaff9 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -10,6 +10,7 @@ #include <linux/component.h> #include <linux/crc-ccitt.h> #include <linux/of_address.h> +#include <linux/of_device.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/reset.h> @@ -1126,6 +1127,7 @@ 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); @@ -1153,17 +1155,20 @@ 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)) { @@ -1193,7 +1198,8 @@ 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; } @@ -1205,7 +1211,8 @@ 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; } @@ -1222,7 +1229,8 @@ 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. @@ -1250,7 +1258,8 @@ 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); @@ -1263,9 +1272,16 @@ 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 c570f2b3868f..5c4983212f89 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h @@ -15,6 +15,10 @@ #include <linux/regulator/consumer.h> +struct sun6i_dsi_variant { + bool has_mod_clk; +}; + struct sun6i_dsi { struct drm_connector connector; struct drm_encoder encoder; @@ -32,6 +36,7 @@ struct sun6i_dsi { struct sun4i_tcon *tcon; 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) -- 2.18.0.321.gffc6fa0e3 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
