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drm/mipi-dbi: Support separate I/O regulator

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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>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20221201160245.2093816-2-otto.pflueger@abscue.de
This commit is contained in:
Otto Pflüger 2022-12-01 17:02:43 +01:00 committed by Noralf Trønnes
parent 58377de46e
commit 3b1fb8b3a3
2 changed files with 20 additions and 1 deletions
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14
drivers/gpu/drm/drm_mipi_dbi.c
View File

@ -417,6 +417,8 @@ 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);
@ -726,6 +728,16 @@ 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;
@ -735,6 +747,8 @@ 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;
}

7
include/drm/drm_mipi_dbi.h
View File

@ -123,10 +123,15 @@ 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
*/