From: Jagan Teki <jagan@amarulasolutions.com>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
linux-sunxi <linux-sunxi@googlegroups.com>,
Jagan Teki <jagan@amarulasolutions.com>,
michael@amarulasolutions.com, linux-amarula@amarulasolutions.com,
linux-arm-kernel@lists.infradead.org,
Icenowy Zheng <icenowy@aosc.io>
Subject: [PATCH v12 3/7] drm/sun4i: dsi: Add has_mod_clk quirk
Date: Tue, 3 Dec 2019 19:18:12 +0530 [thread overview]
Message-ID: <20191203134816.5319-4-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20191203134816.5319-1-jagan@amarulasolutions.com>
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>
---
Changes for v12:
- none
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)
--
2.18.0.321.gffc6fa0e3
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next prev parent reply other threads:[~2019-12-03 13:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 13:48 [PATCH v12 0/7] drm/sun4i: Allwinner A64 MIPI-DSI support Jagan Teki
2019-12-03 13:48 ` [PATCH v12 1/7] dt-bindings: sun6i-dsi: Document A64 MIPI-DSI controller Jagan Teki
2019-12-04 13:36 ` Maxime Ripard
2019-12-16 11:07 ` Jagan Teki
2019-12-16 11:20 ` Maxime Ripard
2019-12-16 16:59 ` Jagan Teki
2019-12-16 18:34 ` Maxime Ripard
2019-12-17 12:06 ` Jagan Teki
2019-12-03 13:48 ` [PATCH v12 2/7] dt-bindings: sun6i-dsi: Add A64 DPHY compatible (w/ A31 fallback) Jagan Teki
2019-12-03 19:18 ` Rob Herring
2019-12-03 13:48 ` Jagan Teki [this message]
2019-12-03 14:39 ` [PATCH v12 3/7] drm/sun4i: dsi: Add has_mod_clk quirk Chen-Yu Tsai
2019-12-03 16:40 ` Jagan Teki
2019-12-03 13:48 ` [PATCH v12 4/7] drm/sun4i: dsi: Handle bus clock via regmap_mmio_attach_clk Jagan Teki
2019-12-03 13:48 ` [PATCH v12 5/7] drm/sun4i: dsi: Add Allwinner A64 MIPI DSI support Jagan Teki
2019-12-03 13:48 ` [PATCH v12 6/7] arm64: dts: allwinner: a64: Add MIPI DSI pipeline Jagan Teki
2019-12-03 13:48 ` [DO NOT MERGE] [PATCH v12 7/7] arm64: dts: allwinner: bananapi-m64: Enable Bananapi S070WV20-CT16 DSI panel Jagan Teki
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