diff options
Diffstat (limited to 'target/linux/omap/patches-3.18/0334-video-da8xx-fb-adding-dt-support.patch')
| -rw-r--r-- | target/linux/omap/patches-3.18/0334-video-da8xx-fb-adding-dt-support.patch | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/target/linux/omap/patches-3.18/0334-video-da8xx-fb-adding-dt-support.patch b/target/linux/omap/patches-3.18/0334-video-da8xx-fb-adding-dt-support.patch new file mode 100644 index 0000000..265602c --- /dev/null +++ b/target/linux/omap/patches-3.18/0334-video-da8xx-fb-adding-dt-support.patch @@ -0,0 +1,202 @@ +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/fbdev/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/fbdev/da8xx-fb.c ++++ b/drivers/video/fbdev/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> + +@@ -1317,12 +1318,54 @@ 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_get_platdata(&dev->dev); + 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) +@@ -1351,7 +1394,7 @@ 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; + } +@@ -1391,7 +1434,10 @@ 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; +@@ -1410,7 +1456,7 @@ 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); + } +@@ -1654,12 +1700,26 @@ static int fb_resume(struct device *dev) + + static SIMPLE_DEV_PM_OPS(fb_pm_ops, fb_suspend, fb_resume); + ++#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, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, ++ .of_match_table = of_match_ptr(da8xx_fb_of_match), + .pm = &fb_pm_ops, + }, + }; |