Merge tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/p…

…za/linux into drm-next

MT8173 DRM support

- device tree binding documentation for all MT8173 display
  subsystem components
- basic mediatek-drm driver for MT8173 with two optional,
  currently fixed output paths:
- DSI encoder support for DSI and (via bridge) eDP panels
- DPI encoder support for output to HDMI bridge
- necessary clock tree changes for the DPI->HDMI path
- export mtk-smi functions used by mediatek-drm

* tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux:
  clk: mediatek: remove hdmitx_dig_cts from TOP clocks
  clk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output
  clk: mediatek: make dpi0_sel propagate rate changes
  drm/mediatek: Add DPI sub driver
  drm/mediatek: Add DSI sub driver
  drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.
  dt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding
  memory: mtk-smi: export mtk_smi_larb_get/put

Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt

@@ -0,0 +1,203 @@
+Mediatek display subsystem
+==========================
+
+The Mediatek display subsystem consists of various DISP function blocks in the
+MMSYS register space. The connections between them can be configured by output
+and input selectors in the MMSYS_CONFIG register space. Pixel clock and start
+of frame signal are distributed to the other function blocks by a DISP_MUTEX
+function block.
+
+All DISP device tree nodes must be siblings to the central MMSYS_CONFIG node.
+For a description of the MMSYS_CONFIG binding, see
+Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt.
+
+DISP function blocks
+====================
+
+A display stream starts at a source function block that reads pixel data from
+memory and ends with a sink function block that drives pixels on a display
+interface, or writes pixels back to memory. All DISP function blocks have
+their own register space, interrupt, and clock gate. The blocks that can
+access memory additionally have to list the IOMMU and local arbiter they are
+connected to.
+
+For a description of the display interface sink function blocks, see
+Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt and
+Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt.
+
+Required properties (all function blocks):
+- compatible: "mediatek,<chip>-disp-<function>", one of
+	"mediatek,<chip>-disp-ovl"   - overlay (4 layers, blending, csc)
+	"mediatek,<chip>-disp-rdma"  - read DMA / line buffer
+	"mediatek,<chip>-disp-wdma"  - write DMA
+	"mediatek,<chip>-disp-color" - color processor
+	"mediatek,<chip>-disp-aal"   - adaptive ambient light controller
+	"mediatek,<chip>-disp-gamma" - gamma correction
+	"mediatek,<chip>-disp-merge" - merge streams from two RDMA sources
+	"mediatek,<chip>-disp-split" - split stream to two encoders
+	"mediatek,<chip>-disp-ufoe"  - data compression engine
+	"mediatek,<chip>-dsi"        - DSI controller, see mediatek,dsi.txt
+	"mediatek,<chip>-dpi"        - DPI controller, see mediatek,dpi.txt
+	"mediatek,<chip>-disp-mutex" - display mutex
+	"mediatek,<chip>-disp-od"    - overdrive
+- reg: Physical base address and length of the function block register space
+- interrupts: The interrupt signal from the function block (required, except for
+  merge and split function blocks).
+- clocks: device clocks
+  See Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
+  For most function blocks this is just a single clock input. Only the DSI and
+  DPI controller nodes have multiple clock inputs. These are documented in
+  mediatek,dsi.txt and mediatek,dpi.txt, respectively.
+
+Required properties (DMA function blocks):
+- compatible: Should be one of
+	"mediatek,<chip>-disp-ovl"
+	"mediatek,<chip>-disp-rdma"
+	"mediatek,<chip>-disp-wdma"
+- larb: Should contain a phandle pointing to the local arbiter device as defined
+  in Documentation/devicetree/bindings/soc/mediatek/mediatek,smi-larb.txt
+- iommus: Should point to the respective IOMMU block with master port as
+  argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+  for details.
+
+Examples:
+
+mmsys: clock-controller@14000000 {
+	compatible = "mediatek,mt8173-mmsys", "syscon";
+	reg = <0 0x14000000 0 0x1000>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	#clock-cells = <1>;
+};
+
+ovl0: ovl@1400c000 {
+	compatible = "mediatek,mt8173-disp-ovl";
+	reg = <0 0x1400c000 0 0x1000>;
+	interrupts = <GIC_SPI 180 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_OVL0>;
+	iommus = <&iommu M4U_PORT_DISP_OVL0>;
+	mediatek,larb = <&larb0>;
+};
+
+ovl1: ovl@1400d000 {
+	compatible = "mediatek,mt8173-disp-ovl";
+	reg = <0 0x1400d000 0 0x1000>;
+	interrupts = <GIC_SPI 181 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_OVL1>;
+	iommus = <&iommu M4U_PORT_DISP_OVL1>;
+	mediatek,larb = <&larb4>;
+};
+
+rdma0: rdma@1400e000 {
+	compatible = "mediatek,mt8173-disp-rdma";
+	reg = <0 0x1400e000 0 0x1000>;
+	interrupts = <GIC_SPI 182 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_RDMA0>;
+	iommus = <&iommu M4U_PORT_DISP_RDMA0>;
+	mediatek,larb = <&larb0>;
+};
+
+rdma1: rdma@1400f000 {
+	compatible = "mediatek,mt8173-disp-rdma";
+	reg = <0 0x1400f000 0 0x1000>;
+	interrupts = <GIC_SPI 183 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_RDMA1>;
+	iommus = <&iommu M4U_PORT_DISP_RDMA1>;
+	mediatek,larb = <&larb4>;
+};
+
+rdma2: rdma@14010000 {
+	compatible = "mediatek,mt8173-disp-rdma";
+	reg = <0 0x14010000 0 0x1000>;
+	interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_RDMA2>;
+	iommus = <&iommu M4U_PORT_DISP_RDMA2>;
+	mediatek,larb = <&larb4>;
+};
+
+wdma0: wdma@14011000 {
+	compatible = "mediatek,mt8173-disp-wdma";
+	reg = <0 0x14011000 0 0x1000>;
+	interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_WDMA0>;
+	iommus = <&iommu M4U_PORT_DISP_WDMA0>;
+	mediatek,larb = <&larb0>;
+};
+
+wdma1: wdma@14012000 {
+	compatible = "mediatek,mt8173-disp-wdma";
+	reg = <0 0x14012000 0 0x1000>;
+	interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_WDMA1>;
+	iommus = <&iommu M4U_PORT_DISP_WDMA1>;
+	mediatek,larb = <&larb4>;
+};
+
+color0: color@14013000 {
+	compatible = "mediatek,mt8173-disp-color";
+	reg = <0 0x14013000 0 0x1000>;
+	interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_COLOR0>;
+};
+
+color1: color@14014000 {
+	compatible = "mediatek,mt8173-disp-color";
+	reg = <0 0x14014000 0 0x1000>;
+	interrupts = <GIC_SPI 188 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_COLOR1>;
+};
+
+aal@14015000 {
+	compatible = "mediatek,mt8173-disp-aal";
+	reg = <0 0x14015000 0 0x1000>;
+	interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_AAL>;
+};
+
+gamma@14016000 {
+	compatible = "mediatek,mt8173-disp-gamma";
+	reg = <0 0x14016000 0 0x1000>;
+	interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_GAMMA>;
+};
+
+ufoe@1401a000 {
+	compatible = "mediatek,mt8173-disp-ufoe";
+	reg = <0 0x1401a000 0 0x1000>;
+	interrupts = <GIC_SPI 191 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_UFOE>;
+};
+
+dsi0: dsi@1401b000 {
+	/* See mediatek,dsi.txt for details */
+};
+
+dpi0: dpi@1401d000 {
+	/* See mediatek,dpi.txt for details */
+};
+
+mutex: mutex@14020000 {
+	compatible = "mediatek,mt8173-disp-mutex";
+	reg = <0 0x14020000 0 0x1000>;
+	interrupts = <GIC_SPI 169 IRQ_TYPE_LEVEL_LOW>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_MUTEX_32K>;
+};
+
+od@14023000 {
+	compatible = "mediatek,mt8173-disp-od";
+	reg = <0 0x14023000 0 0x1000>;
+	power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
+	clocks = <&mmsys CLK_MM_DISP_OD>;
+};

Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt

@@ -0,0 +1,35 @@
+Mediatek DPI Device
+===================
+
+The Mediatek DPI function block is a sink of the display subsystem and
+provides 8-bit RGB/YUV444 or 8/10/10-bit YUV422 pixel data on a parallel
+output bus.
+
+Required properties:
+- compatible: "mediatek,<chip>-dpi"
+- reg: Physical base address and length of the controller's registers
+- interrupts: The interrupt signal from the function block.
+- clocks: device clocks
+  See Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
+- clock-names: must contain "pixel", "engine", and "pll"
+- port: Output port node with endpoint definitions as described in
+  Documentation/devicetree/bindings/graph.txt. This port should be connected
+  to the input port of an attached HDMI or LVDS encoder chip.
+
+Example:
+
+dpi0: dpi@1401d000 {
+	compatible = "mediatek,mt8173-dpi";
+	reg = <0 0x1401d000 0 0x1000>;
+	interrupts = <GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>;
+	clocks = <&mmsys CLK_MM_DPI_PIXEL>,
+		 <&mmsys CLK_MM_DPI_ENGINE>,
+		 <&apmixedsys CLK_APMIXED_TVDPLL>;
+	clock-names = "pixel", "engine", "pll";
+
+	port {
+		dpi0_out: endpoint {
+			remote-endpoint = <&hdmi0_in>;
+		};
+	};
+};

Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt

@@ -0,0 +1,60 @@
+Mediatek DSI Device
+===================
+
+The Mediatek DSI function block is a sink of the display subsystem and can
+drive up to 4-lane MIPI DSI output. Two DSIs can be synchronized for dual-
+channel output.
+
+Required properties:
+- compatible: "mediatek,<chip>-dsi"
+- reg: Physical base address and length of the controller's registers
+- interrupts: The interrupt signal from the function block.
+- clocks: device clocks
+  See Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
+- clock-names: must contain "engine", "digital", and "hs"
+- phys: phandle link to the MIPI D-PHY controller.
+- phy-names: must contain "dphy"
+- port: Output port node with endpoint definitions as described in
+  Documentation/devicetree/bindings/graph.txt. This port should be connected
+  to the input port of an attached DSI panel or DSI-to-eDP encoder chip.
+
+MIPI TX Configuration Module
+============================
+
+The MIPI TX configuration module controls the MIPI D-PHY.
+
+Required properties:
+- compatible: "mediatek,<chip>-mipi-tx"
+- reg: Physical base address and length of the controller's registers
+- clocks: PLL reference clock
+- clock-output-names: name of the output clock line to the DSI encoder
+- #clock-cells: must be <0>;
+- #phy-cells: must be <0>.
+
+Example:
+
+mipi_tx0: mipi-dphy@10215000 {
+	compatible = "mediatek,mt8173-mipi-tx";
+	reg = <0 0x10215000 0 0x1000>;
+	clocks = <&clk26m>;
+	clock-output-names = "mipi_tx0_pll";
+	#clock-cells = <0>;
+	#phy-cells = <0>;
+};
+
+dsi0: dsi@1401b000 {
+	compatible = "mediatek,mt8173-dsi";
+	reg = <0 0x1401b000 0 0x1000>;
+	interrupts = <GIC_SPI 192 IRQ_TYPE_LEVEL_LOW>;
+	clocks = <&mmsys MM_DSI0_ENGINE>, <&mmsys MM_DSI0_DIGITAL>,
+		 <&mipi_tx0>;
+	clock-names = "engine", "digital", "hs";
+	phys = <&mipi_tx0>;
+	phy-names = "dphy";
+
+	port {
+		dsi0_out: endpoint {
+			remote-endpoint = <&panel_in>;
+		};
+	};
+};

drivers/clk/mediatek/clk-mt8173.c

@@ -61,7 +61,6 @@ static const struct mtk_fixed_factor top_divs[] __initconst = {
 	FACTOR(CLK_TOP_CLKRTC_INT, "clkrtc_int", "clk26m", 1, 793),
 	FACTOR(CLK_TOP_FPC, "fpc_ck", "clk26m", 1, 1),
 
-	FACTOR(CLK_TOP_HDMITX_DIG_CTS, "hdmitx_dig_cts", "tvdpll_445p5m", 1, 3),
 	FACTOR(CLK_TOP_HDMITXPLL_D2, "hdmitxpll_d2", "hdmitx_dig_cts", 1, 2),
 	FACTOR(CLK_TOP_HDMITXPLL_D3, "hdmitxpll_d3", "hdmitx_dig_cts", 1, 3),
 
@@ -558,7 +557,11 @@ static const struct mtk_composite top_muxes[] __initconst = {
 	MUX_GATE(CLK_TOP_ATB_SEL, "atb_sel", atb_parents, 0x0090, 16, 2, 23),
 	MUX_GATE(CLK_TOP_VENC_LT_SEL, "venclt_sel", venc_lt_parents, 0x0090, 24, 4, 31),
 	/* CLK_CFG_6 */
-	MUX_GATE(CLK_TOP_DPI0_SEL, "dpi0_sel", dpi0_parents, 0x00a0, 0, 3, 7),
+	/*
+	 * The dpi0_sel clock should not propagate rate changes to its parent
+	 * clock so the dpi driver can have full control over PLL and divider.
+	 */
+	MUX_GATE_FLAGS(CLK_TOP_DPI0_SEL, "dpi0_sel", dpi0_parents, 0x00a0, 0, 3, 7, 0),
 	MUX_GATE(CLK_TOP_IRDA_SEL, "irda_sel", irda_parents, 0x00a0, 8, 2, 15),
 	MUX_GATE(CLK_TOP_CCI400_SEL, "cci400_sel", cci400_parents, 0x00a0, 16, 3, 23),
 	MUX_GATE(CLK_TOP_AUD_1_SEL, "aud_1_sel", aud_1_parents, 0x00a0, 24, 2, 31),
@@ -1091,6 +1094,11 @@ static void __init mtk_apmixedsys_init(struct device_node *node)
 		clk_data->clks[cku->id] = clk;
 	}
 
+	clk = clk_register_divider(NULL, "hdmi_ref", "tvdpll_594m", 0,
+				   base + 0x40, 16, 3, CLK_DIVIDER_POWER_OF_TWO,
+				   NULL);
+	clk_data->clks[CLK_APMIXED_HDMI_REF] = clk;
+
 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
 	if (r)
 		pr_err("%s(): could not register clock provider: %d\n",

drivers/clk/mediatek/clk-mtk.h

@@ -83,7 +83,11 @@ struct mtk_composite {
 	signed char num_parents;
 };
 
-#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) {	\
+/*
+ * In case the rate change propagation to parent clocks is undesirable,
+ * this macro allows to specify the clock flags manually.
+ */
+#define MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, _flags) {	\
 		.id = _id,						\
 		.name = _name,						\
 		.mux_reg = _reg,					\
@@ -94,9 +98,16 @@ struct mtk_composite {
 		.divider_shift = -1,					\
 		.parent_names = _parents,				\
 		.num_parents = ARRAY_SIZE(_parents),			\
-		.flags = CLK_SET_RATE_PARENT,				\
+		.flags = _flags,					\
 	}
 
+/*
+ * Unless necessary, all MUX_GATE clocks propagate rate changes to their
+ * parent clock by default.
+ */
+#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate)	\
+	MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, CLK_SET_RATE_PARENT)
+
 #define MUX(_id, _name, _parents, _reg, _shift, _width) {		\
 		.id = _id,						\
 		.name = _name,						\

drivers/gpu/drm/Kconfig

@@ -288,3 +288,5 @@ source "drivers/gpu/drm/etnaviv/Kconfig"
 source "drivers/gpu/drm/arc/Kconfig"
 
 source "drivers/gpu/drm/hisilicon/Kconfig"
+
+source "drivers/gpu/drm/mediatek/Kconfig"

drivers/gpu/drm/Makefile

@@ -74,6 +74,7 @@ obj-$(CONFIG_DRM_MSM) += msm/
 obj-$(CONFIG_DRM_TEGRA) += tegra/
 obj-$(CONFIG_DRM_STI) += sti/
 obj-$(CONFIG_DRM_IMX) += imx/
+obj-$(CONFIG_DRM_MEDIATEK) += mediatek/
 obj-y			+= i2c/
 obj-y			+= panel/
 obj-y			+= bridge/

drivers/gpu/drm/mediatek/Kconfig

@@ -0,0 +1,16 @@
+config DRM_MEDIATEK
+	tristate "DRM Support for Mediatek SoCs"
+	depends on DRM
+	depends on ARCH_MEDIATEK || (ARM && COMPILE_TEST)
+	select DRM_GEM_CMA_HELPER
+	select DRM_KMS_HELPER
+	select DRM_MIPI_DSI
+	select DRM_PANEL
+	select IOMMU_DMA
+	select MEMORY
+	select MTK_SMI
+	help
+	  Choose this option if you have a Mediatek SoCs.
+	  The module will be called mediatek-drm
+	  This driver provides kernel mode setting and
+	  buffer management to userspace.