[V6,2/2] video: drm: exynos: Add device tree support

Message ID	1348226536-22899-3-git-send-email-l.krishna@samsung.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org> From: Leela Krishna Amudala <l.krishna@samsung.com> To: dri-devel@lists.freedesktop.org, devicetree-discuss@lists.ozlabs.org Subject: [PATCH V6 2/2] video: drm: exynos: Add device tree support Date: Fri, 21 Sep 2012 16:52:16 +0530 Message-id: <1348226536-22899-3-git-send-email-l.krishna@samsung.com> In-reply-to: <1348226536-22899-1-git-send-email-l.krishna@samsung.com> References: <1348226536-22899-1-git-send-email-l.krishna@samsung.com> DLP-Filter: Pass summary: Content analysis details: (-5.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [203.254.224.24 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 1.9 DATE_IN_FUTURE_06_12 Date: is 6 to 12 hours after BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: inki.dae@samsung.com, kgene.kim@samsung.com, linux-samsung-soc@vger.kernel.org, laurent.pinchart@ideasonboard.com, linux-arm-kernel@lists.infradead.org Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org

diff --git a/Documentation/devicetree/bindings/drm/exynos/fimd.txt b/Documentation/devicetree/bindings/drm/exynos/fimd.txt new file mode 100644 index 0000000..e94120c --- /dev/null +++ b/Documentation/devicetree/bindings/drm/exynos/fimd.txt @@ -0,0 +1,80 @@ +* Samsung Display Controller using DRM frame work + +The display controller is used to transfer image data from memory to an +external LCD driver interface. It supports various color formats such as +rgb and yuv. + +Required properties: + - compatible: Should be "samsung,exynos5-fimd" or "samsung,exynos4-fimd" for + fimd using DRM frame work. + - reg: physical base address of the controller and length of memory + mapped region. + - interrupts: Three interrupts should be specified. The interrupts should be + specified in the following order. + - VSYNC interrupt + - FIFO level interrupt + - FIMD System Interrupt + + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Display panels Y resolution. + + + - samsung,default-window: Specifies the default window number of the fimd controller. + + - samsung,fimd-win-bpp: Specifies the bits per pixel. + +Optional properties: + - samsung,fimd-vidout-rgb: Video output format is RGB. + - samsung,fimd-inv-vclk: invert video clock polarity. + - samsung,fimd-frame-rate: Number of video frames per second. + +Example: + + The following is an example for the fimd controller is split into + two portions. The SoC specific portion can be specified in the SoC + specific dts file. The board specific portion can be specified in the + board specific dts file. + + - SoC Specific portion + + fimd { + compatible = "samsung,exynos5-fimd"; + interrupt-parent = <&combiner>; + reg = <0x14400000 0x40000>; + interrupts = <18 5>, <18 4>, <18 6>; + }; + + - Board Specific portion + + lcd_fimd0: lcd_panel0 { + lcd-htiming = <4 4 4 480>; + lcd-vtiming = <4 4 4 320>; + supports-mipi-panel; + }; + + fimd { + samsung,fimd-display = <&lcd_fimd0>; + samsung,fimd-vidout-rgb; + samsung,fimd-inv-vclk; + samsung,fimd-frame-rate = <60>; + samsung,default-window = <0>; + samsung,fimd-win-bpp = <32>; + }; + diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 1ad10b6..b2d22ac 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -18,6 +18,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/pm_runtime.h> +#include <linux/of.h> #include <video/samsung_fimd.h> #include <drm/exynos_drm.h> @@ -103,9 +104,18 @@ struct fimd_context { struct exynos_drm_panel_info *panel; }; +static const struct of_device_id fimd_dt_match[]; + static inline struct fimd_driver_data *drm_fimd_get_driver_data( struct platform_device *pdev) { +#ifdef CONFIG_OF + if (pdev->dev.of_node) { + const struct of_device_id *match; + match = of_match_ptr(fimd_dt_match); + return (struct fimd_driver_data *)match->data; + } +#endif return (struct fimd_driver_data *) platform_get_device_id(pdev)->driver_data; } @@ -809,12 +819,77 @@ static int fimd_power_on(struct fimd_context *ctx, bool enable) return 0; } +#ifdef CONFIG_OF +static struct exynos_drm_fimd_pdata *drm_fimd_dt_parse_pdata(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct device_node *disp_np; + struct exynos_drm_fimd_pdata *pd; + u32 data[4]; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_err(dev, "memory allocation for pdata failed\n"); + return ERR_PTR(-ENOMEM); + } + + if (of_get_property(np, "samsung,fimd-vidout-rgb", NULL)) + pd->vidcon0 |= VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB; + if (of_get_property(np, "samsung,fimd-inv-hsync", NULL)) + pd->vidcon1 |= VIDCON1_INV_HSYNC; + if (of_get_property(np, "samsung,fimd-inv-vsync", NULL)) + pd->vidcon1 |= VIDCON1_INV_VSYNC; + if (of_get_property(np, "samsung,fimd-inv-vclk", NULL)) + pd->vidcon1 |= VIDCON1_INV_VCLK; + if (of_get_property(np, "samsung,fimd-inv-vden", NULL)) + pd->vidcon1 |= VIDCON1_INV_VDEN; + + disp_np = of_parse_phandle(np, "samsung,fimd-display", 0); + if (!disp_np) { + dev_err(dev, "unable to find display panel info\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32_array(disp_np, "lcd-htiming", data, 4)) { + dev_err(dev, "invalid horizontal timing\n"); + return ERR_PTR(-EINVAL); + } + pd->panel.timing.left_margin = data[0]; + pd->panel.timing.right_margin = data[1]; + pd->panel.timing.hsync_len = data[2]; + pd->panel.timing.xres = data[3]; + + if (of_property_read_u32_array(disp_np, "lcd-vtiming", data, 4)) { + dev_err(dev, "invalid vertical timing\n"); + return ERR_PTR(-EINVAL); + } + pd->panel.timing.upper_margin = data[0]; + pd->panel.timing.lower_margin = data[1]; + pd->panel.timing.vsync_len = data[2]; + pd->panel.timing.yres = data[3]; + + of_property_read_u32(np, "samsung,fimd-frame-rate", + &pd->panel.timing.refresh); + + of_property_read_u32(np, "samsung,default-window", &pd->default_win); + + of_property_read_u32(np, "samsung,fimd-win-bpp", &pd->bpp); + + return pd; +} +#else +static struct exynos_drm_fimd_pdata *drm_fimd_dt_parse_pdata(struct device *dev) +{ + return NULL; +} +#endif /* CONFIG_OF */ + static int __devinit fimd_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct fimd_context *ctx; struct exynos_drm_subdrv *subdrv; - struct exynos_drm_fimd_pdata *pdata; + struct exynos_drm_fimd_pdata *pdata = pdev->dev.platform_data; struct exynos_drm_panel_info *panel; struct resource *res; int win; @@ -822,7 +897,11 @@ static int __devinit fimd_probe(struct platform_device *pdev) DRM_DEBUG_KMS("%s\n", __FILE__); - pdata = pdev->dev.platform_data; + if (pdev->dev.of_node) { + pdata = drm_fimd_dt_parse_pdata(&pdev->dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } if (!pdata) { dev_err(dev, "no platform data specified\n"); return -EINVAL; @@ -1011,6 +1090,17 @@ static struct platform_device_id fimd_driver_ids[] = { }; MODULE_DEVICE_TABLE(platform, fimd_driver_ids); +#ifdef CONFIG_OF +static const struct of_device_id fimd_dt_match[] = { + { .compatible = "samsung,exynos5-fimd", + .data = &exynos5_fimd_driver_data }, + { .compatible = "samsung,exynos4-fimd", + .data = &exynos4_fimd_driver_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, fimd_dt_match); +#endif + static const struct dev_pm_ops fimd_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume) SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL) @@ -1024,5 +1114,6 @@ struct platform_driver fimd_driver = { .name = "exynos4-fb", .owner = THIS_MODULE, .pm = &fimd_pm_ops, + .of_match_table = of_match_ptr(fimd_dt_match), }, };

[V6,2/2] video: drm: exynos: Add device tree support

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