Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753237AbaFXLzV (ORCPT ); Tue, 24 Jun 2014 07:55:21 -0400 Received: from fw-tnat.austin.arm.com ([217.140.110.23]:45690 "EHLO collaborate-mta1.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753135AbaFXLzR (ORCPT ); Tue, 24 Jun 2014 07:55:17 -0400 From: Pawel Moll To: Rob Herring , Mark Rutland , Ian Campbell , Kumar Gala , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Russell King Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Pawel Moll Subject: [PATCH v9] video: ARM CLCD: Add DT support Date: Tue, 24 Jun 2014 12:55:11 +0100 Message-Id: <1403610911-31491-1-git-send-email-pawel.moll@arm.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds basic DT bindings for the PL11x CLCD cells and make their fbdev driver use them. Signed-off-by: Pawel Moll --- Changes since v8: - removed "arm,pl11x,framebuffer" property; a "memory-region" phandle is to be used instead Changes since v7: - fixed typo in "clock-names" documentation - renamed "arm,pl11x,framebuffer-base" into "arm,pl11x,framebuffer" as it is describing both base and size - added more explanation for "max-memory-bandwidth" property - added more explanation for "arm,pl11x,tft-r0g0b0" property Changes since v6: - replaced in-node device-timing subnode with the standard video interface bindings (as in: ports & endpoints); only "panel-dpi" compatible panels are supported in the driver Changes since v5: - realised that dma_alloc_writecombine() is a arm-specific function; replaced with generic dma_alloc_coherent()/dma_mmap_writecombine() Changes since v4: - simplified the pads description property and made it optional Changes since v3: - changed wording and order of interrupt-names and interrupts properties documentation - changed wording of arm,pl11x,framebuffer-base property documentation - cleaned up binding documentation indentation Changes since v2: - replaced video-ram phandle with arm,pl11x,framebuffer-base - replaced panel-* properties with arm,pl11x,panel-data-pads - replaced max-framebuffer-size with max-memory-bandwidth - modified clcdfb_of_init_tft_panel() to use the pads data and take differences between PL110 and PL110 into account Changes since v1: - minor code cleanups as suggested by Sylwester Nawrocki .../devicetree/bindings/video/arm,pl11x.txt | 109 +++++++++ drivers/video/fbdev/Kconfig | 1 + drivers/video/fbdev/amba-clcd.c | 263 +++++++++++++++++++++ 3 files changed, 373 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/arm,pl11x.txt diff --git a/Documentation/devicetree/bindings/video/arm,pl11x.txt b/Documentation/devicetree/bindings/video/arm,pl11x.txt new file mode 100644 index 0000000..3e3039a --- /dev/null +++ b/Documentation/devicetree/bindings/video/arm,pl11x.txt @@ -0,0 +1,109 @@ +* ARM PrimeCell Color LCD Controller PL110/PL111 + +See also Documentation/devicetree/bindings/arm/primecell.txt + +Required properties: + +- compatible: must be one of: + "arm,pl110", "arm,primecell" + "arm,pl111", "arm,primecell" + +- reg: base address and size of the control registers block + +- interrupt-names: either the single entry "combined" representing a + combined interrupt output (CLCDINTR), or the four entries + "mbe", "vcomp", "lnbu", "fuf" representing the individual + CLCDMBEINTR, CLCDVCOMPINTR, CLCDLNBUINTR, CLCDFUFINTR interrupts + +- interrupts: contains an interrupt specifier for each entry in + interrupt-names + +- clock-names: should contain "clcdclk" and "apb_pclk" + +- clocks: contains phandle and clock specifier pairs for the entries + in the clock-names property. See + Documentation/devicetree/binding/clock/clock-bindings.txt + +Optional properties: + +- memory-region: phandle to a node describing memory (see + Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt) + to be used for the framebuffer; if not present, the framebuffer + may be located anywhere in the memory + +- max-memory-bandwidth: maximum bandwidth in bytes per second that the + cell's memory interface can handle; if not present, the memory + interface is fast enough to handle all possible video modes + +Required sub-nodes: + +- port: describes LCD panel signals, following the common binding + for video transmitter interfaces; see + Documentation/devicetree/bindings/media/video-interfaces.txt; + when it is a TFT panel, the port's endpoint must define the + following property: + + - arm,pl11x,tft-r0g0b0-pads: an array of three 32-bit values, + defining the way CLD pads are wired up; first value + contains index of the "CLD" external pin (pad) used + as R0 (first bit of the red component), second value + index of the pad used as G0, third value index of the + pad used as B0, see also "LCD panel signal multiplexing + details" paragraphs in the PL110/PL111 Technical + Reference Manuals; this implicitly defines available + color modes, for example: + - PL111 TFT 4:4:4 panel: + arm,pl11x,tft-r0g0b0-pads = <4 15 20>; + - PL110 TFT (1:)5:5:5 panel: + arm,pl11x,tft-r0g0b0-pads = <1 7 13>; + - PL111 TFT (1:)5:5:5 panel: + arm,pl11x,tft-r0g0b0-pads = <3 11 19>; + - PL111 TFT 5:6:5 panel: + arm,pl11x,tft-r0g0b0-pads = <3 10 19>; + - PL110 and PL111 TFT 8:8:8 panel: + arm,pl11x,tft-r0g0b0-pads = <0 8 16>; + - PL110 and PL111 TFT 8:8:8 panel, R & B components swapped: + arm,pl11x,tft-r0g0b0-pads = <16 8 0>; + + +Example: + + clcd@10020000 { + compatible = "arm,pl111", "arm,primecell"; + reg = <0x10020000 0x1000>; + interrupt-names = "combined"; + interrupts = <0 44 4>; + clocks = <&oscclk1>, <&oscclk2>; + clock-names = "clcdclk", "apb_pclk"; + max-memory-bandwidth = <94371840>; /* Bps, 1024x768@60 16bpp */ + + port { + clcd_pads: endpoint { + remote-endpoint = <&clcd_panel>; + arm,pl11x,tft-r0g0b0-pads = <0 8 16>; + }; + }; + + }; + + panel { + compatible = "panel-dpi"; + + port { + clcd_panel: endpoint { + remote-endpoint = <&clcd_pads>; + }; + }; + + panel-timing { + clock-frequency = <25175000>; + hactive = <640>; + hback-porch = <40>; + hfront-porch = <24>; + hsync-len = <96>; + vactive = <480>; + vback-porch = <32>; + vfront-porch = <11>; + vsync-len = <2>; + }; + }; diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index 59c98bfd..a518fe5 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -280,6 +280,7 @@ config FB_ARMCLCD select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT + select VIDEOMODE_HELPERS if OF help This framebuffer device driver is for the ARM PrimeCell PL110 Colour LCD controller. ARM PrimeCells provide the building diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c index 14d6b37..23b3519 100644 --- a/drivers/video/fbdev/amba-clcd.c +++ b/drivers/video/fbdev/amba-clcd.c @@ -26,6 +26,13 @@ #include #include #include +#include +#include +#include +#include +#include