diff mbox series

[v2,1/3] drm/mipi-dbi: Support separate I/O regulator

Message ID 20221201160245.2093816-2-otto.pflueger@abscue.de (mailing list archive)
State New, archived
Headers show
Series drm/tiny: panel-mipi-dbi: Support separate I/O voltage supply | expand

Commit Message

Otto Pflüger Dec. 1, 2022, 4:02 p.m. UTC 
The MIPI DBI specification defines separate vdd (panel power) and
vddi (I/O voltage) supplies. Displays that require different voltages
for the different supplies do exist, so the supplies cannot be
combined into one as they are now. Add a new io_regulator property to
the mipi_dbi_dev struct which can be set by the panel driver along
with the regulator property.

Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
---
 drivers/gpu/drm/drm_mipi_dbi.c | 14 ++++++++++++++
 include/drm/drm_mipi_dbi.h     |  7 ++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

Comments

Noralf Trønnes Dec. 3, 2022, 4:19 p.m. UTC | #1 
Den 01.12.2022 17.02, skrev Otto Pflüger:
> The MIPI DBI specification defines separate vdd (panel power) and
> vddi (I/O voltage) supplies. Displays that require different voltages
> for the different supplies do exist, so the supplies cannot be
> combined into one as they are now. Add a new io_regulator property to
> the mipi_dbi_dev struct which can be set by the panel driver along
> with the regulator property.
> 
> Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
> ---

Thanks for fixing this, I'll apply the patches in a few days.

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
index a6ac56580876..047cab93a041 100644
--- a/drivers/gpu/drm/drm_mipi_dbi.c
+++ b/drivers/gpu/drm/drm_mipi_dbi.c
@@ -427,6 +427,8 @@  void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe)
 
 	if (dbidev->regulator)
 		regulator_disable(dbidev->regulator);
+	if (dbidev->io_regulator)
+		regulator_disable(dbidev->io_regulator);
 }
 EXPORT_SYMBOL(mipi_dbi_pipe_disable);
 
@@ -652,6 +654,16 @@  static int mipi_dbi_poweron_reset_conditional(struct mipi_dbi_dev *dbidev, bool
 		}
 	}
 
+	if (dbidev->io_regulator) {
+		ret = regulator_enable(dbidev->io_regulator);
+		if (ret) {
+			DRM_DEV_ERROR(dev, "Failed to enable I/O regulator (%d)\n", ret);
+			if (dbidev->regulator)
+				regulator_disable(dbidev->regulator);
+			return ret;
+		}
+	}
+
 	if (cond && mipi_dbi_display_is_on(dbi))
 		return 1;
 
@@ -661,6 +673,8 @@  static int mipi_dbi_poweron_reset_conditional(struct mipi_dbi_dev *dbidev, bool
 		DRM_DEV_ERROR(dev, "Failed to send reset command (%d)\n", ret);
 		if (dbidev->regulator)
 			regulator_disable(dbidev->regulator);
+		if (dbidev->io_regulator)
+			regulator_disable(dbidev->io_regulator);
 		return ret;
 	}
 
diff --git a/include/drm/drm_mipi_dbi.h b/include/drm/drm_mipi_dbi.h
index 14eaecb1825c..e4efbd8ffc9d 100644
--- a/include/drm/drm_mipi_dbi.h
+++ b/include/drm/drm_mipi_dbi.h
@@ -122,10 +122,15 @@  struct mipi_dbi_dev {
 	struct backlight_device *backlight;
 
 	/**
-	 * @regulator: power regulator (optional)
+	 * @regulator: power regulator (Vdd) (optional)
 	 */
 	struct regulator *regulator;
 
+	/**
+	 * @io_regulator: I/O power regulator (Vddi) (optional)
+	 */
+	struct regulator *io_regulator;
+
 	/**
 	 * @dbi: MIPI DBI interface
 	 */