36829e951b
Linux uses get_modes() to fetch all available panel modes from the driver. This is also used to fetch the modes from Linux's simple panel implementation where a list of drm_display_mode structs is used to define the different possible panels. To make our work easier, create a compatible way of fetching and defining these modes in u-boot. get_modes() fetches the available modes from the panel driver. The get_display_timing() call maps the drm_display_mode properties to the display_timing struct. This call now uses whatever panel operation is available, get_display_timing() or get_modes(). Reviewed-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2016 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_PANEL
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#include <dm.h>
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#include <panel.h>
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int panel_enable_backlight(struct udevice *dev)
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{
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struct panel_ops *ops = panel_get_ops(dev);
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if (!ops->enable_backlight)
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return -ENOSYS;
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return ops->enable_backlight(dev);
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}
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/**
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* panel_set_backlight - Set brightness for the panel backlight
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*
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* @dev: Panel device containing the backlight to update
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* @percent: Brightness value (0=off, 1=min brightness,
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* 100=full brightness)
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* Return: 0 if OK, -ve on error
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*/
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int panel_set_backlight(struct udevice *dev, int percent)
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{
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struct panel_ops *ops = panel_get_ops(dev);
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if (!ops->set_backlight)
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return -ENOSYS;
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return ops->set_backlight(dev, percent);
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}
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static void drm_mode_to_display_timing(const struct drm_display_mode *mode,
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struct display_timing *timing)
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{
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timing->pixelclock.typ = mode->clock * 1000; /* kHz to Hz */
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timing->hactive.typ = mode->hdisplay;
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timing->hfront_porch.typ = mode->hsync_start - mode->hdisplay;
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timing->hsync_len.typ = mode->hsync_end - mode->hsync_start;
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timing->hback_porch.typ = mode->htotal - mode->hsync_end;
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timing->vactive.typ = mode->vdisplay;
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timing->vfront_porch.typ = mode->vsync_start - mode->vdisplay;
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timing->vsync_len.typ = mode->vsync_end - mode->vsync_start;
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timing->vback_porch.typ = mode->vtotal - mode->vsync_end;
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/* DRM_MODE_FLAG_* defines are already mapped to u-boot DISPLAY_FLAGS */
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timing->flags = mode->flags;
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}
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int panel_get_display_timing(struct udevice *dev,
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struct display_timing *timings)
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{
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struct panel_ops *ops = panel_get_ops(dev);
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const struct drm_display_mode *modes;
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int ret = -ENOSYS;
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if (ops->get_display_timing) {
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ret = ops->get_display_timing(dev, timings);
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if (ret != -ENODEV)
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return ret;
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}
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if (!ops->get_modes)
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return ret;
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ret = ops->get_modes(dev, &modes);
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if (ret < 0)
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return ret;
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else if (ret == 0)
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return -ENODEV;
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drm_mode_to_display_timing(&modes[0], timings);
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return 0;
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}
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UCLASS_DRIVER(panel) = {
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.id = UCLASS_PANEL,
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.name = "panel",
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};
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