From: Thierry Reding <thierry.reding@gmail.com> To: Hans de Goede <hdegoede@redhat.com>, Helge Deller <deller@gmx.de> Cc: Robert Foss <rfoss@kernel.org>, Jon Hunter <jonathanh@nvidia.com>, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 1/2] fbdev/simplefb: Support memory-region property Date: Wed, 1 Nov 2023 18:20:16 +0100 [thread overview] Message-ID: <20231101172017.3872242-2-thierry.reding@gmail.com> (raw) In-Reply-To: <20231101172017.3872242-1-thierry.reding@gmail.com> From: Thierry Reding <treding@nvidia.com> The simple-framebuffer bindings specify that the "memory-region" property can be used as an alternative to the "reg" property to define the framebuffer memory used by the display hardware. Implement support for this in the simplefb driver. Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <treding@nvidia.com> --- drivers/video/fbdev/simplefb.c | 35 +++++++++++++++++++++++++++++----- 1 file changed, 30 insertions(+), 5 deletions(-) diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c index 62f99f6fccd3..18025f34fde7 100644 --- a/drivers/video/fbdev/simplefb.c +++ b/drivers/video/fbdev/simplefb.c @@ -21,6 +21,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/of.h> +#include <linux/of_address.h> #include <linux/of_clk.h> #include <linux/of_platform.h> #include <linux/parser.h> @@ -121,12 +122,13 @@ struct simplefb_params { u32 height; u32 stride; struct simplefb_format *format; + struct resource memory; }; static int simplefb_parse_dt(struct platform_device *pdev, struct simplefb_params *params) { - struct device_node *np = pdev->dev.of_node; + struct device_node *np = pdev->dev.of_node, *mem; int ret; const char *format; int i; @@ -166,6 +168,23 @@ static int simplefb_parse_dt(struct platform_device *pdev, return -EINVAL; } + mem = of_parse_phandle(np, "memory-region", 0); + if (mem) { + ret = of_address_to_resource(mem, 0, ¶ms->memory); + if (ret < 0) { + dev_err(&pdev->dev, "failed to parse memory-region\n"); + of_node_put(mem); + return ret; + } + + if (of_property_present(np, "reg")) + dev_warn(&pdev->dev, "preferring \"memory-region\" over \"reg\" property\n"); + + of_node_put(mem); + } else { + memset(¶ms->memory, 0, sizeof(params->memory)); + } + return 0; } @@ -193,6 +212,8 @@ static int simplefb_parse_pd(struct platform_device *pdev, return -EINVAL; } + memset(¶ms->memory, 0, sizeof(params->memory)); + return 0; } @@ -431,10 +452,14 @@ static int simplefb_probe(struct platform_device *pdev) if (ret) return ret; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "No memory resource\n"); - return -EINVAL; + if (params.memory.start == 0 && params.memory.end == 0) { + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "No memory resource\n"); + return -EINVAL; + } + } else { + res = ¶ms.memory; } mem = request_mem_region(res->start, resource_size(res), "simplefb"); -- 2.42.0
WARNING: multiple messages have this Message-ID (diff)
From: Thierry Reding <thierry.reding@gmail.com> To: Hans de Goede <hdegoede@redhat.com>, Helge Deller <deller@gmx.de> Cc: linux-tegra@vger.kernel.org, linux-fbdev@vger.kernel.org, Robert Foss <rfoss@kernel.org>, dri-devel@lists.freedesktop.org, Jon Hunter <jonathanh@nvidia.com> Subject: [PATCH v2 1/2] fbdev/simplefb: Support memory-region property Date: Wed, 1 Nov 2023 18:20:16 +0100 [thread overview] Message-ID: <20231101172017.3872242-2-thierry.reding@gmail.com> (raw) In-Reply-To: <20231101172017.3872242-1-thierry.reding@gmail.com> From: Thierry Reding <treding@nvidia.com> The simple-framebuffer bindings specify that the "memory-region" property can be used as an alternative to the "reg" property to define the framebuffer memory used by the display hardware. Implement support for this in the simplefb driver. Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <treding@nvidia.com> --- drivers/video/fbdev/simplefb.c | 35 +++++++++++++++++++++++++++++----- 1 file changed, 30 insertions(+), 5 deletions(-) diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c index 62f99f6fccd3..18025f34fde7 100644 --- a/drivers/video/fbdev/simplefb.c +++ b/drivers/video/fbdev/simplefb.c @@ -21,6 +21,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/of.h> +#include <linux/of_address.h> #include <linux/of_clk.h> #include <linux/of_platform.h> #include <linux/parser.h> @@ -121,12 +122,13 @@ struct simplefb_params { u32 height; u32 stride; struct simplefb_format *format; + struct resource memory; }; static int simplefb_parse_dt(struct platform_device *pdev, struct simplefb_params *params) { - struct device_node *np = pdev->dev.of_node; + struct device_node *np = pdev->dev.of_node, *mem; int ret; const char *format; int i; @@ -166,6 +168,23 @@ static int simplefb_parse_dt(struct platform_device *pdev, return -EINVAL; } + mem = of_parse_phandle(np, "memory-region", 0); + if (mem) { + ret = of_address_to_resource(mem, 0, ¶ms->memory); + if (ret < 0) { + dev_err(&pdev->dev, "failed to parse memory-region\n"); + of_node_put(mem); + return ret; + } + + if (of_property_present(np, "reg")) + dev_warn(&pdev->dev, "preferring \"memory-region\" over \"reg\" property\n"); + + of_node_put(mem); + } else { + memset(¶ms->memory, 0, sizeof(params->memory)); + } + return 0; } @@ -193,6 +212,8 @@ static int simplefb_parse_pd(struct platform_device *pdev, return -EINVAL; } + memset(¶ms->memory, 0, sizeof(params->memory)); + return 0; } @@ -431,10 +452,14 @@ static int simplefb_probe(struct platform_device *pdev) if (ret) return ret; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "No memory resource\n"); - return -EINVAL; + if (params.memory.start == 0 && params.memory.end == 0) { + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "No memory resource\n"); + return -EINVAL; + } + } else { + res = ¶ms.memory; } mem = request_mem_region(res->start, resource_size(res), "simplefb"); -- 2.42.0
next prev parent reply other threads:[~2023-11-01 17:20 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-11-01 17:20 [PATCH v2 0/2] fbdev/simplefb: Add missing simple-framebuffer features Thierry Reding 2023-11-01 17:20 ` Thierry Reding 2023-11-01 17:20 ` Thierry Reding [this message] 2023-11-01 17:20 ` [PATCH v2 1/2] fbdev/simplefb: Support memory-region property Thierry Reding 2023-11-01 17:20 ` [PATCH v2 2/2] fbdev/simplefb: Add support for generic power-domains Thierry Reding 2023-11-01 17:20 ` Thierry Reding 2023-11-21 1:17 ` Richard Acayan 2023-11-21 1:17 ` Richard Acayan 2023-11-21 9:01 ` Hans de Goede 2023-11-21 9:01 ` Hans de Goede 2023-11-22 0:01 ` Richard Acayan 2023-11-22 0:01 ` Richard Acayan 2023-11-22 8:42 ` Hans de Goede 2023-11-22 8:42 ` Hans de Goede 2023-11-01 17:54 ` [PATCH v2 0/2] fbdev/simplefb: Add missing simple-framebuffer features Hans de Goede 2023-11-01 17:54 ` Hans de Goede 2023-11-02 10:54 ` Hans de Goede 2023-11-02 10:54 ` Hans de Goede
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