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authorDave Airlie <airlied@redhat.com>2013-12-23 10:43:42 +1000
committerDave Airlie <airlied@redhat.com>2013-12-23 10:43:42 +1000
commit785e15ecefbfe8ea311ae320fdacd482a84b3cc3 (patch)
tree46ed5413424d3893bf6236684e597388f68ad5ad /drivers/gpu/drm/drm_panel.c
parente6c3dcdea6c95e4de98681a6cb3124ed8eacd5d6 (diff)
parent81239c6f7972d4909a6862d08ed1d2943983ffd4 (diff)
downloadlinaro-lsk-785e15ecefbfe8ea311ae320fdacd482a84b3cc3.tar.gz
Merge tag 'drm/for-3.14-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/tegra: Changes for v3.14-rc1 This series of changes brings DRM panel support as well as initial code to register DSI hosts and peripherals and bind them to DSI drivers. The panel and DSI code are both used by the simple panel driver. The Tegra-specific changes build on top of this work to add support for various panels found on Tegra boards. New drivers enable the DSI host found on Tegra114 and a special hardware block that calibrates the pads used for DSI and CSI. The host1x and the display controller drivers gain basic Tegra124 support. To round of the new features, the DRM driver now sports a very simple PRIME implementation. In addition there are various improvements such as the host1x API being exported so that client drivers (like the Tegra DRM driver) can be built as modules. HDMI now does better power management and legacy FBDEV can now be disabled via Kconfig (though it's still enabled by default). A few sparse warnings have been squashed and various parts of the code have become more robust. * tag 'drm/for-3.14-rc1' of git://anongit.freedesktop.org/tegra/linux: (121 commits) drm/tegra: fix compile w/ CONFIG_DYNAMIC_DEBUG drm/tegra: Add PRIME support drm/tegra: Relocate some output-specific code drm/tegra: Add Tegra124 DC support drm/tegra: Fix small leak on error in tegra_fb_alloc() drm/tegra: Make legacy fbdev support optional drm/tegra: Sort reverse-dependencies alphabetically drm/tegra: Fix return value check drm/tegra: Add DSI support drm/tegra: Disable outputs for power-saving drm/tegra: Track HDMI enable state drm/tegra: Fix HDMI audio frequency typo drm/tegra: Do not export tegra_bo_ops drm/tegra: Remove spurious blank line drm/tegra: Increase compile test coverage drm/tegra: Allow the driver to be built as a module gpu: host1x: Add Tegra124 support gpu: host1x: clk_round_rate() can return a zero upon error gpu: host1x: Fix build warnings gpu: host1x: Increase compile test coverage ...
Diffstat (limited to 'drivers/gpu/drm/drm_panel.c')
-rw-r--r--drivers/gpu/drm/drm_panel.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
new file mode 100644
index 00000000000..2ef988e037b
--- /dev/null
+++ b/drivers/gpu/drm/drm_panel.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_panel.h>
+
+static DEFINE_MUTEX(panel_lock);
+static LIST_HEAD(panel_list);
+
+void drm_panel_init(struct drm_panel *panel)
+{
+ INIT_LIST_HEAD(&panel->list);
+}
+EXPORT_SYMBOL(drm_panel_init);
+
+int drm_panel_add(struct drm_panel *panel)
+{
+ mutex_lock(&panel_lock);
+ list_add_tail(&panel->list, &panel_list);
+ mutex_unlock(&panel_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_panel_add);
+
+void drm_panel_remove(struct drm_panel *panel)
+{
+ mutex_lock(&panel_lock);
+ list_del_init(&panel->list);
+ mutex_unlock(&panel_lock);
+}
+EXPORT_SYMBOL(drm_panel_remove);
+
+int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
+{
+ if (panel->connector)
+ return -EBUSY;
+
+ panel->connector = connector;
+ panel->drm = connector->dev;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_panel_attach);
+
+int drm_panel_detach(struct drm_panel *panel)
+{
+ panel->connector = NULL;
+ panel->drm = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_panel_detach);
+
+#ifdef CONFIG_OF
+struct drm_panel *of_drm_find_panel(struct device_node *np)
+{
+ struct drm_panel *panel;
+
+ mutex_lock(&panel_lock);
+
+ list_for_each_entry(panel, &panel_list, list) {
+ if (panel->dev->of_node == np) {
+ mutex_unlock(&panel_lock);
+ return panel;
+ }
+ }
+
+ mutex_unlock(&panel_lock);
+ return NULL;
+}
+EXPORT_SYMBOL(of_drm_find_panel);
+#endif
+
+MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
+MODULE_DESCRIPTION("DRM panel infrastructure");
+MODULE_LICENSE("GPL and additional rights");