20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
113 lines
3.4 KiB
Diff
113 lines
3.4 KiB
Diff
From ab0dac9b018f82dfb5696e9671734178d226872f Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Sun, 27 Feb 2022 13:47:11 +0100
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Subject: [PATCH] drm/modes: Add of_get_drm_panel_display_mode()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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commit 95ae342 upstream.
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Add a function to get a drm_display_mode from a panel-timing
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device tree subnode.
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Suggested-by: Sam Ravnborg <sam@ravnborg.org>
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Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-4-noralf@tronnes.org
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---
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drivers/gpu/drm/drm_modes.c | 49 +++++++++++++++++++++++++++++++++++++
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include/drm/drm_modes.h | 8 ++++++
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2 files changed, 57 insertions(+)
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--- a/drivers/gpu/drm/drm_modes.c
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+++ b/drivers/gpu/drm/drm_modes.c
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@@ -35,6 +35,7 @@
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#include <linux/list_sort.h>
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#include <linux/export.h>
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+#include <video/of_display_timing.h>
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#include <video/of_videomode.h>
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#include <video/videomode.h>
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@@ -727,6 +728,54 @@ int of_get_drm_display_mode(struct devic
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return 0;
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}
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EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
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+
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+/**
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+ * of_get_drm_panel_display_mode - get a panel-timing drm_display_mode from devicetree
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+ * @np: device_node with the panel-timing specification
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+ * @dmode: will be set to the return value
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+ * @bus_flags: information about pixelclk, sync and DE polarity
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+ *
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+ * The Device Tree properties width-mm and height-mm will be read and set on
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+ * the display mode if they are present.
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+ *
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+ * Returns:
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+ * Zero on success, negative error code on failure.
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+ */
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+int of_get_drm_panel_display_mode(struct device_node *np,
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+ struct drm_display_mode *dmode, u32 *bus_flags)
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+{
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+ u32 width_mm = 0, height_mm = 0;
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+ struct display_timing timing;
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+ struct videomode vm;
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+ int ret;
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+
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+ ret = of_get_display_timing(np, "panel-timing", &timing);
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+ if (ret)
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+ return ret;
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+
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+ videomode_from_timing(&timing, &vm);
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+
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+ memset(dmode, 0, sizeof(*dmode));
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+ drm_display_mode_from_videomode(&vm, dmode);
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+ if (bus_flags)
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+ drm_bus_flags_from_videomode(&vm, bus_flags);
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+
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+ ret = of_property_read_u32(np, "width-mm", &width_mm);
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+ if (ret && ret != -EINVAL)
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+ return ret;
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+
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+ ret = of_property_read_u32(np, "height-mm", &height_mm);
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+ if (ret && ret != -EINVAL)
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+ return ret;
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+
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+ dmode->width_mm = width_mm;
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+ dmode->height_mm = height_mm;
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+
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+ drm_mode_debug_printmodeline(dmode);
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(of_get_drm_panel_display_mode);
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#endif /* CONFIG_OF */
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#endif /* CONFIG_VIDEOMODE_HELPERS */
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--- a/include/drm/drm_modes.h
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+++ b/include/drm/drm_modes.h
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@@ -466,6 +466,8 @@ void drm_bus_flags_from_videomode(const
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int of_get_drm_display_mode(struct device_node *np,
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struct drm_display_mode *dmode, u32 *bus_flags,
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int index);
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+int of_get_drm_panel_display_mode(struct device_node *np,
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+ struct drm_display_mode *dmode, u32 *bus_flags);
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#else
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static inline int of_get_drm_display_mode(struct device_node *np,
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struct drm_display_mode *dmode,
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@@ -473,6 +475,12 @@ static inline int of_get_drm_display_mod
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{
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return -EINVAL;
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}
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+
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+static inline int of_get_drm_panel_display_mode(struct device_node *np,
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+ struct drm_display_mode *dmode, u32 *bus_flags)
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+{
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+ return -EINVAL;
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+}
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#endif
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void drm_mode_set_name(struct drm_display_mode *mode);
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