+++ /dev/null
-From 884d3962ef4787c8cf0b8a7a673531c623d1dff8 Mon Sep 17 00:00:00 2001
-From: Darren Etheridge <detheridge@ti.com>
-Date: Fri, 2 Aug 2013 15:35:36 -0500
-Subject: [PATCH 334/752] video: da8xx-fb: adding dt support
-
-Enhancing driver to enable probe triggered by a corresponding dt entry.
-
-Add da8xx-fb.txt documentation to devicetree section.
-
-Obtain fb_videomode details for the connected lcd panel using the
-display timing details present in DT.
-
-Ensure that platform data is present before checking whether platform
-callback is present (the one used to control backlight). So far this
-was not an issue as driver was purely non-DT triggered, but now DT
-support has been added this check must be performed.
-
-v2: squashing multiple commits from Afzal Mohammed (afzal@ti.com)
-v3: remove superfluous cast
-v4: expose both ti,am3352-lcdc and ti,da830-lcdc for .compatible
- as driver can use enhanced features of all version of the
- silicon block.
-v5: addressed review comments from Prabhakar Lad
-v6: Changed the .compatible naming to match the existing drm bindings
- for am33xx devices
-v7: clarify which compatible to use in the documentation for DA850
-
-Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
-Signed-off-by: Darren Etheridge <detheridge@ti.com>
----
- .../devicetree/bindings/video/da8xx-fb.txt | 42 +++++++++++++
- drivers/video/da8xx-fb.c | 66 +++++++++++++++++++-
- 2 files changed, 105 insertions(+), 3 deletions(-)
- create mode 100644 Documentation/devicetree/bindings/video/da8xx-fb.txt
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/video/da8xx-fb.txt
-@@ -0,0 +1,42 @@
-+TI LCD Controller on DA830/DA850/AM335x SoC's
-+
-+Required properties:
-+- compatible:
-+ DA830, DA850 - "ti,da8xx-tilcdc"
-+ AM335x SoC's - "ti,am33xx-tilcdc"
-+- reg: Address range of lcdc register set
-+- interrupts: lcdc interrupt
-+- display-timings: typical videomode of lcd panel, represented as child.
-+ Refer Documentation/devicetree/bindings/video/display-timing.txt for
-+ display timing binding details. If multiple videomodes are mentioned
-+ in display timings node, typical videomode has to be mentioned as the
-+ native mode or it has to be first child (driver cares only for native
-+ videomode).
-+
-+Recommended properties:
-+- ti,hwmods: Name of the hwmod associated to the LCDC
-+
-+Example for am335x SoC's:
-+
-+lcdc@4830e000 {
-+ compatible = "ti,am33xx-tilcdc";
-+ reg = <0x4830e000 0x1000>;
-+ interrupts = <36>;
-+ ti,hwmods = "lcdc";
-+ status = "okay";
-+ display-timings {
-+ 800x480p62 {
-+ clock-frequency = <30000000>;
-+ hactive = <800>;
-+ vactive = <480>;
-+ hfront-porch = <39>;
-+ hback-porch = <39>;
-+ hsync-len = <47>;
-+ vback-porch = <29>;
-+ vfront-porch = <13>;
-+ vsync-len = <2>;
-+ hsync-active = <1>;
-+ vsync-active = <1>;
-+ };
-+ };
-+};
---- a/drivers/video/da8xx-fb.c
-+++ b/drivers/video/da8xx-fb.c
-@@ -36,6 +36,7 @@
- #include <linux/slab.h>
- #include <linux/delay.h>
- #include <linux/lcm.h>
-+#include <video/of_display_timing.h>
- #include <video/da8xx-fb.h>
- #include <asm/div64.h>
-
-@@ -1312,12 +1313,54 @@ static struct fb_ops da8xx_fb_ops = {
- .fb_blank = cfb_blank,
- };
-
-+static struct lcd_ctrl_config *da8xx_fb_create_cfg(struct platform_device *dev)
-+{
-+ struct lcd_ctrl_config *cfg;
-+
-+ cfg = devm_kzalloc(&dev->dev, sizeof(struct fb_videomode), GFP_KERNEL);
-+ if (!cfg)
-+ return NULL;
-+
-+ /* default values */
-+
-+ if (lcd_revision == LCD_VERSION_1)
-+ cfg->bpp = 16;
-+ else
-+ cfg->bpp = 32;
-+
-+ /*
-+ * For panels so far used with this LCDC, below statement is sufficient.
-+ * For new panels, if required, struct lcd_ctrl_cfg fields to be updated
-+ * with additional/modified values. Those values would have to be then
-+ * obtained from dt(requiring new dt bindings).
-+ */
-+
-+ cfg->panel_shade = COLOR_ACTIVE;
-+
-+ return cfg;
-+}
-+
- static struct fb_videomode *da8xx_fb_get_videomode(struct platform_device *dev)
- {
- struct da8xx_lcdc_platform_data *fb_pdata = dev->dev.platform_data;
- struct fb_videomode *lcdc_info;
-+ struct device_node *np = dev->dev.of_node;
- int i;
-
-+ if (np) {
-+ lcdc_info = devm_kzalloc(&dev->dev,
-+ sizeof(struct fb_videomode),
-+ GFP_KERNEL);
-+ if (!lcdc_info)
-+ return NULL;
-+
-+ if (of_get_fb_videomode(np, lcdc_info, OF_USE_NATIVE_MODE)) {
-+ dev_err(&dev->dev, "timings not available in DT\n");
-+ return NULL;
-+ }
-+ return lcdc_info;
-+ }
-+
- for (i = 0, lcdc_info = known_lcd_panels;
- i < ARRAY_SIZE(known_lcd_panels); i++, lcdc_info++) {
- if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
-@@ -1346,7 +1389,7 @@ static int fb_probe(struct platform_devi
- int ret;
- unsigned long ulcm;
-
-- if (fb_pdata == NULL) {
-+ if (fb_pdata == NULL && !device->dev.of_node) {
- dev_err(&device->dev, "Can not get platform data\n");
- return -ENOENT;
- }
-@@ -1386,7 +1429,10 @@ static int fb_probe(struct platform_devi
- break;
- }
-
-- lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
-+ if (device->dev.of_node)
-+ lcd_cfg = da8xx_fb_create_cfg(device);
-+ else
-+ lcd_cfg = fb_pdata->controller_data;
-
- if (!lcd_cfg) {
- ret = -EINVAL;
-@@ -1405,7 +1451,7 @@ static int fb_probe(struct platform_devi
- par->dev = &device->dev;
- par->lcdc_clk = tmp_lcdc_clk;
- par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
-- if (fb_pdata->panel_power_ctrl) {
-+ if (fb_pdata && fb_pdata->panel_power_ctrl) {
- par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
- par->panel_power_ctrl(1);
- }
-@@ -1653,6 +1699,19 @@ static int fb_resume(struct platform_dev
- #define fb_resume NULL
- #endif
-
-+#if IS_ENABLED(CONFIG_OF)
-+static const struct of_device_id da8xx_fb_of_match[] = {
-+ /*
-+ * this driver supports version 1 and version 2 of the
-+ * Texas Instruments lcd controller (lcdc) hardware block
-+ */
-+ {.compatible = "ti,da8xx-tilcdc", },
-+ {.compatible = "ti,am33xx-tilcdc", },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, da8xx_fb_of_match);
-+#endif
-+
- static struct platform_driver da8xx_fb_driver = {
- .probe = fb_probe,
- .remove = fb_remove,
-@@ -1661,6 +1720,7 @@ static struct platform_driver da8xx_fb_d
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
-+ .of_match_table = of_match_ptr(da8xx_fb_of_match),
- },
- };
-
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