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[GIT PULL] drm: sti: add DVO output connector

by Benjamin Gaignard

Hello Dave, This patch enable the last big hardware feature of my driver: the connector for panel. Like for HMDI and HDA, Digital Video Out (DVO) create brige, encoder and connector drm objects. The following changes since commit 4e0cd68115620bc3236ff4e58e4c073948629b41: drm: sti: fix module compilation issue (2014-12-15 17:07:57 +1000) are available in the git repository at: http://git.linaro.org/people/benjamin.gaignard/kernel.git drm-sti-next-add-dvo for you to fetch changes up to f32c4c506f9b197f24d4be4ee7283bd549e3a30f: drm: sti: add DVO output connector (2014-12-30 15:08:16 +0100) ---------------------------------------------------------------- Benjamin Gaignard (1): drm: sti: add DVO output connector .../devicetree/bindings/gpu/st,stih4xx.txt | 29 ++ drivers/gpu/drm/sti/Makefile | 4 + drivers/gpu/drm/sti/sti_awg_utils.c | 184 +++++++ drivers/gpu/drm/sti/sti_awg_utils.h | 34 ++ drivers/gpu/drm/sti/sti_dvo.c | 551 +++++++++++++++++++++ drivers/gpu/drm/sti/sti_tvout.c | 118 +++++ 6 files changed, 920 insertions(+) create mode 100644 drivers/gpu/drm/sti/sti_awg_utils.c create mode 100644 drivers/gpu/drm/sti/sti_awg_utils.h create mode 100644 drivers/gpu/drm/sti/sti_dvo.c

11 years

[RFC 0/4] dma-buf Constraints-Enabled Allocation helpers

by Sumit Semwal

Hi, Why: ==== While sharing buffers using dma-buf, currently there's no mechanism to let devices share their memory access constraints with each other to allow for delayed allocation of backing storage. This RFC attempts to introduce the idea of memory constraints of a device, and how these constraints can be shared and used to help allocate buffers that can satisfy requirements of all devices attached to a particular dma-buf. How: ==== A constraints_mask is added to dma_parms of the device, and at the time of each device attachment to a dma-buf, the dma-buf uses this constraints_mask to calculate the access_mask for the dma-buf. Allocators can be defined for each of these constraints_masks, and then helper functions can be used to allocate the backing storage from the matching allocator satisfying the constraints of all devices interested. A new miscdevice, /dev/cenalloc [1] is created, which acts as the dma-buf exporter to make this transparent to the devices. More details in the patch description of "cenalloc: Constraint-Enabled Allocation helpers for dma-buf". At present, the constraint_mask is only a bitmask, but it should be possible to change it to a struct and adapt the constraint_mask calculation accordingly, based on discussion. Important requirement: ====================== Of course, delayed allocation can only work if all participating devices will wait for other devices to have 'attached' before mapping the buffer for the first time. As of now, users of dma-buf(drm prime, v4l2 etc) call the attach() and then map_attachment() almost immediately after it. This would need to be changed if they were to benefit from constraints. What 'cenalloc' is not: ======================= - not 'general' allocator helpers - useful only for constraints-enabled devices that share buffers with others using dma-buf. - not a replacement for existing allocation mechanisms inside various subsystems; merely a possible alternative. - no page-migration - it would be very complementary to the delayed allocation suggested here. TODOs: ====== - demonstration test cases - vma helpers for allocators - more sample allocators - userspace ioctl (It should be a simple one, and we have one ready, but wanted to agree on the kernel side of things first) May the brickbats begin, please! :) Best regards, ~Sumit. [1]: 'C'onstraints 'EN'abled 'ALLOC'ation helpers = cenalloc: it might not be a very appealing name, so suggestions are very welcome! Benjamin Gaignard (1): cenalloc: a sample allocator for contiguous page allocation Sumit Semwal (3): dma-buf: Add constraints sharing information cenalloc: Constraint-Enabled Allocation helpers for dma-buf cenalloc: Build files for constraint-enabled allocation helpers MAINTAINERS | 1 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/cenalloc/Kconfig | 8 + drivers/cenalloc/Makefile | 3 + drivers/cenalloc/cenalloc.c | 597 ++++++++++++++++++++++++++++++ drivers/cenalloc/cenalloc.h | 99 +++++ drivers/cenalloc/cenalloc_priv.h | 188 ++++++++++ drivers/cenalloc/cenalloc_system_contig.c | 225 +++++++++++ drivers/dma-buf/dma-buf.c | 50 ++- include/linux/device.h | 7 +- include/linux/dma-buf.h | 14 + 12 files changed, 1189 insertions(+), 6 deletions(-) create mode 100644 drivers/cenalloc/Kconfig create mode 100644 drivers/cenalloc/Makefile create mode 100644 drivers/cenalloc/cenalloc.c create mode 100644 drivers/cenalloc/cenalloc.h create mode 100644 drivers/cenalloc/cenalloc_priv.h create mode 100644 drivers/cenalloc/cenalloc_system_contig.c -- 1.9.1

11 years

arm64 - IOMMU

by Jorge Ramirez-Ortiz

Hi, I need some some pointers on how to write a IOMMU driver on arm64 for a new SoC. The iommu interface is currently not being provided in dma-mappings.c (the DMA API is SWIOTLB-based) what is the alternative? thanks Jorge

11 years, 1 month

[PATCH] drm: sti: add DVO output connector

by Benjamin Gaignard

Digital Video Out connector driver LCD panels. Like HDMI and HDA it create bridge, encoder and connector drm object. Add binding descrition. Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- .../devicetree/bindings/gpu/st,stih4xx.txt | 29 ++ drivers/gpu/drm/sti/Makefile | 4 + drivers/gpu/drm/sti/sti_awg_utils.c | 184 +++++++ drivers/gpu/drm/sti/sti_awg_utils.h | 34 ++ drivers/gpu/drm/sti/sti_dvo.c | 551 +++++++++++++++++++++ drivers/gpu/drm/sti/sti_tvout.c | 118 +++++ 6 files changed, 920 insertions(+) create mode 100644 drivers/gpu/drm/sti/sti_awg_utils.c create mode 100644 drivers/gpu/drm/sti/sti_awg_utils.h create mode 100644 drivers/gpu/drm/sti/sti_dvo.c diff --git a/Documentation/devicetree/bindings/gpu/st,stih4xx.txt b/Documentation/devicetree/bindings/gpu/st,stih4xx.txt index c99eb34..6b1d75f 100644 --- a/Documentation/devicetree/bindings/gpu/st,stih4xx.txt +++ b/Documentation/devicetree/bindings/gpu/st,stih4xx.txt @@ -83,6 +83,22 @@ sti-hda: - clock-names: names of the clocks listed in clocks property in the same order. +sti-dvo: + Required properties: + must be a child of sti-tvout + - compatible: "st,stih<chip>-dvo" + - reg: Physical base address of the IP registers and length of memory mapped region. + - reg-names: names of the mapped memory regions listed in regs property in + the same order. + - clocks: from common clock binding: handle hardware IP needed clocks, the + number of clocks may depend of the SoC type. + See ../clocks/clock-bindings.txt for details. + - clock-names: names of the clocks listed in clocks property in the same + order. + - pinctrl-0: pin control handle + - pinctrl-name: names of the pin control to use + - sti,panel: phandle of the panel connected to the DVO output + sti-hqvdp: must be a child of sti-display-subsystem Required properties: @@ -198,6 +214,19 @@ Example: clock-names = "pix", "hddac"; clocks = <&clockgen_c_vcc CLK_S_PIX_HD>, <&clockgen_c_vcc CLK_S_HDDAC>; }; + + sti-dvo@8d00400 { + compatible = "st,stih407-dvo"; + reg = <0x8d00400 0x200>; + reg-names = "dvo-reg"; + clock-names = "dvo_pix", "dvo", + "main_parent", "aux_parent"; + clocks = <&clk_s_d2_flexgen CLK_PIX_DVO>, <&clk_s_d2_flexgen CLK_DVO>, + <&clk_s_d2_quadfs 0>, <&clk_s_d2_quadfs 1>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_dvo>; + sti,panel = <&panel_dvo>; + }; }; sti-hqvdp@9c000000 { diff --git a/drivers/gpu/drm/sti/Makefile b/drivers/gpu/drm/sti/Makefile index 6ba9d27..f0f1e4e 100644 --- a/drivers/gpu/drm/sti/Makefile +++ b/drivers/gpu/drm/sti/Makefile @@ -12,6 +12,9 @@ stihdmi-y := sti_hdmi.o \ sti_hdmi_tx3g0c55phy.o \ sti_hdmi_tx3g4c28phy.o \ +stidvo-y := sti_dvo.o \ + sti_awg_utils.o + obj-$(CONFIG_DRM_STI) = \ sti_vtg.o \ sti_vtac.o \ @@ -20,4 +23,5 @@ obj-$(CONFIG_DRM_STI) = \ sti_tvout.o \ sticompositor.o \ sti_hqvdp.o \ + stidvo.o \ sti_drm_drv.o diff --git a/drivers/gpu/drm/sti/sti_awg_utils.c b/drivers/gpu/drm/sti/sti_awg_utils.c new file mode 100644 index 0000000..9fde3ee --- /dev/null +++ b/drivers/gpu/drm/sti/sti_awg_utils.c @@ -0,0 +1,184 @@ +/* + * Copyright (C) STMicroelectronics SA 2014 + * Author: Vincent Abriou <vincent.abriou(a)st.com> for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include "sti_awg_utils.h" + +#define AWG_OPCODE_OFFSET 10 + +enum opcode { + SET, + RPTSET, + RPLSET, + SKIP, + STOP, + REPEAT, + REPLAY, + JUMP, + HOLD, +}; + +static int awg_generate_instr(enum opcode opcode, + long int arg, + long int mux_sel, + long int data_en, + struct awg_code_generation_params *fwparams) +{ + u32 instruction = 0; + u32 mux = (mux_sel << 8) & 0x1ff; + u32 data_enable = (data_en << 9) & 0x2ff; + long int arg_tmp = arg; + + /* skip, repeat and replay arg should not exceed 1023. + * If user wants to exceed this value, the instruction should be + * duplicate and arg should be adjust for each duplicated instruction. + */ + + while (arg_tmp > 0) { + arg = arg_tmp; + if (fwparams->instruction_offset >= AWG_MAX_INST) { + DRM_ERROR("too many number of instructions\n"); + return -EINVAL; + } + + switch (opcode) { + case SKIP: + /* leave 'arg' + 1 pixel elapsing without changing + * output bus */ + arg--; /* pixel adjustment */ + arg_tmp--; + + if (arg < 0) { + /* SKIP instruction not needed */ + return 0; + } + + if (arg == 0) { + /* SKIP 0 not permitted but we want to skip 1 + * pixel. So we transform SKIP into SET + * instruction */ + opcode = SET; + arg = (arg << 24) >> 24; + arg &= (0x0ff); + break; + } + + mux = 0; + data_enable = 0; + arg = (arg << 22) >> 22; + arg &= (0x3ff); + break; + case REPEAT: + case REPLAY: + if (arg == 0) { + /* REPEAT or REPLAY instruction not needed */ + return 0; + } + + mux = 0; + data_enable = 0; + arg = (arg << 22) >> 22; + arg &= (0x3ff); + break; + case JUMP: + mux = 0; + data_enable = 0; + arg |= 0x40; /* for jump instruction 7th bit is 1 */ + arg = (arg << 22) >> 22; + arg &= 0x3ff; + break; + case STOP: + arg = 0; + break; + case SET: + case RPTSET: + case RPLSET: + case HOLD: + arg = (arg << 24) >> 24; + arg &= (0x0ff); + break; + default: + DRM_ERROR("instruction %d does not exist\n", opcode); + return -EINVAL; + } + + arg_tmp = arg_tmp - arg; + + arg = ((arg + mux) + data_enable); + + instruction = ((opcode) << AWG_OPCODE_OFFSET) | arg; + fwparams->ram_code[fwparams->instruction_offset] = + instruction & (0x3fff); + fwparams->instruction_offset++; + } + return 0; +} + +int sti_awg_generate_code_data_enable_mode( + struct awg_code_generation_params *fwparams, + struct awg_timing *timing) +{ + long int val; + long int data_en; + int ret = 0; + + if (timing->trailing_lines > 0) { + /* skip trailing lines */ + val = timing->blanking_level; + data_en = 0; + ret |= awg_generate_instr(RPLSET, val, 0, data_en, fwparams); + + val = timing->trailing_lines - 1; + data_en = 0; + ret |= awg_generate_instr(REPLAY, val, 0, data_en, fwparams); + } + + if (timing->trailing_pixels > 0) { + /* skip trailing pixel */ + val = timing->blanking_level; + data_en = 0; + ret |= awg_generate_instr(RPLSET, val, 0, data_en, fwparams); + + val = timing->trailing_pixels - 1; + data_en = 0; + ret |= awg_generate_instr(SKIP, val, 0, data_en, fwparams); + } + + /* set DE signal high */ + val = timing->blanking_level; + data_en = 1; + ret |= awg_generate_instr((timing->trailing_pixels > 0) ? SET : RPLSET, + val, 0, data_en, fwparams); + + if (timing->blanking_pixels > 0) { + /* skip the number of active pixel */ + val = timing->active_pixels - 1; + data_en = 1; + ret |= awg_generate_instr(SKIP, val, 0, data_en, fwparams); + + /* set DE signal low */ + val = timing->blanking_level; + data_en = 0; + ret |= awg_generate_instr(SET, val, 0, data_en, fwparams); + } + + /* replay the sequence as many active lines defined */ + val = timing->active_lines - 1; + data_en = 0; + ret |= awg_generate_instr(REPLAY, val, 0, data_en, fwparams); + + if (timing->blanking_lines > 0) { + /* skip blanking lines */ + val = timing->blanking_level; + data_en = 0; + ret |= awg_generate_instr(RPLSET, val, 0, data_en, fwparams); + + val = timing->blanking_lines - 1; + data_en = 0; + ret |= awg_generate_instr(REPLAY, val, 0, data_en, fwparams); + } + + return ret; +} diff --git a/drivers/gpu/drm/sti/sti_awg_utils.h b/drivers/gpu/drm/sti/sti_awg_utils.h new file mode 100644 index 0000000..45d599b --- /dev/null +++ b/drivers/gpu/drm/sti/sti_awg_utils.h @@ -0,0 +1,34 @@ +/* + * Copyright (C) STMicroelectronics SA 2014 + * Author: Vincent Abriou <vincent.abriou(a)st.com> for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#ifndef _STI_AWG_UTILS_H_ +#define _STI_AWG_UTILS_H_ + +#include <drm/drmP.h> + +#define AWG_MAX_INST 64 + +struct awg_code_generation_params { + u32 *ram_code; + u8 instruction_offset; +}; + +struct awg_timing { + u32 total_lines; + u32 active_lines; + u32 blanking_lines; + u32 trailing_lines; + u32 total_pixels; + u32 active_pixels; + u32 blanking_pixels; + u32 trailing_pixels; + u32 blanking_level; +}; + +int sti_awg_generate_code_data_enable_mode( + struct awg_code_generation_params *fw_gen_params, + struct awg_timing *timing); +#endif diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c new file mode 100644 index 0000000..651afad --- /dev/null +++ b/drivers/gpu/drm/sti/sti_dvo.c @@ -0,0 +1,551 @@ +/* + * Copyright (C) STMicroelectronics SA 2014 + * Author: Vincent Abriou <vincent.abriou(a)st.com> for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/platform_device.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_panel.h> + +#include "sti_awg_utils.h" +#include "sti_mixer.h" + +/* DVO registers */ +#define DVO_AWG_DIGSYNC_CTRL 0x0000 +#define DVO_DOF_CFG 0x0004 +#define DVO_LUT_PROG_LOW 0x0008 +#define DVO_LUT_PROG_MID 0x000C +#define DVO_LUT_PROG_HIGH 0x0010 +#define DVO_DIGSYNC_INSTR_I 0x0100 + +#define DVO_AWG_CTRL_EN BIT(0) +#define DVO_AWG_FRAME_BASED_SYNC BIT(2) + +#define DVO_DOF_EN_LOWBYTE BIT(0) +#define DVO_DOF_EN_MIDBYTE BIT(1) +#define DVO_DOF_EN_HIGHBYTE BIT(2) +#define DVO_DOF_EN BIT(6) +#define DVO_DOF_MOD_COUNT_SHIFT 8 + +#define DVO_LUT_ZERO 0 +#define DVO_LUT_Y_G 1 +#define DVO_LUT_Y_G_DEL 2 +#define DVO_LUT_CB_B 3 +#define DVO_LUT_CB_B_DEL 4 +#define DVO_LUT_CR_R 5 +#define DVO_LUT_CR_R_DEL 6 +#define DVO_LUT_HOLD 7 + +struct dvo_config { + u32 flags; + u32 lowbyte; + u32 midbyte; + u32 highbyte; + int (*awg_fwgen_fct)( + struct awg_code_generation_params *fw_gen_params, + struct awg_timing *timing); +}; + +static struct dvo_config rgb_24bit_de_cfg = { + .flags = (0L << DVO_DOF_MOD_COUNT_SHIFT), + .lowbyte = DVO_LUT_CR_R, + .midbyte = DVO_LUT_Y_G, + .highbyte = DVO_LUT_CB_B, + .awg_fwgen_fct = sti_awg_generate_code_data_enable_mode, +}; + +/** + * STI digital video output structure + * + * @dev: driver device + * @drm_dev: pointer to drm device + * @mode: current display mode selected + * @regs: dvo registers + * @clk_pix: pixel clock for dvo + * @clk: clock for dvo + * @clk_main_parent: dvo parent clock if main path used + * @clk_aux_parent: dvo parent clock if aux path used + * @panel_node: panel node reference from device tree + * @panel: reference to the panel connected to the dvo + * @enabled: true if dvo is enabled else false + * @encoder: drm_encoder it is bound + */ +struct sti_dvo { + struct device dev; + struct drm_device *drm_dev; + struct drm_display_mode mode; + void __iomem *regs; + struct clk *clk_pix; + struct clk *clk; + struct clk *clk_main_parent; + struct clk *clk_aux_parent; + struct device_node *panel_node; + struct drm_panel *panel; + struct dvo_config *config; + bool enabled; + struct drm_encoder *encoder; +}; + +struct sti_dvo_connector { + struct drm_connector drm_connector; + struct drm_encoder *encoder; + struct sti_dvo *dvo; +}; + +#define to_sti_dvo_connector(x) \ + container_of(x, struct sti_dvo_connector, drm_connector) + +#define BLANKING_LEVEL 16 +int dvo_awg_generate_code(struct sti_dvo *dvo, u8 *ram_size, u32 *ram_code) +{ + struct drm_display_mode *mode = &dvo->mode; + struct dvo_config *config = dvo->config; + struct awg_code_generation_params fw_gen_params; + struct awg_timing timing; + + fw_gen_params.ram_code = ram_code; + fw_gen_params.instruction_offset = 0; + + timing.total_lines = mode->vtotal; + timing.active_lines = mode->vdisplay; + timing.blanking_lines = mode->vsync_start - mode->vdisplay; + timing.trailing_lines = mode->vtotal - mode->vsync_start; + timing.total_pixels = mode->htotal; + timing.active_pixels = mode->hdisplay; + timing.blanking_pixels = mode->hsync_start - mode->hdisplay; + timing.trailing_pixels = mode->htotal - mode->hsync_start; + timing.blanking_level = BLANKING_LEVEL; + + if (config->awg_fwgen_fct(&fw_gen_params, &timing)) { + DRM_ERROR("AWG firmware not properly generated\n"); + return -EINVAL; + } + + *ram_size = fw_gen_params.instruction_offset; + + return 0; +} + +/* Configure AWG, writing instructions + * + * @dvo: pointer to DVO structure + * @awg_ram_code: pointer to AWG instructions table + * @nb: nb of AWG instructions + */ +static void dvo_awg_configure(struct sti_dvo *dvo, u32 *awg_ram_code, int nb) +{ + int i; + + DRM_DEBUG_DRIVER("\n"); + + for (i = 0; i < nb; i++) + writel(awg_ram_code[i], + dvo->regs + DVO_DIGSYNC_INSTR_I + i * 4); + for (i = nb; i < AWG_MAX_INST; i++) + writel(0, dvo->regs + DVO_DIGSYNC_INSTR_I + i * 4); + + writel(DVO_AWG_CTRL_EN, dvo->regs + DVO_AWG_DIGSYNC_CTRL); +} + +static void sti_dvo_disable(struct drm_bridge *bridge) +{ + struct sti_dvo *dvo = bridge->driver_private; + + if (!dvo->enabled) + return; + + DRM_DEBUG_DRIVER("\n"); + + if (dvo->config->awg_fwgen_fct) + writel(0x00000000, dvo->regs + DVO_AWG_DIGSYNC_CTRL); + + writel(0x00000000, dvo->regs + DVO_DOF_CFG); + + if (dvo->panel) + dvo->panel->funcs->disable(dvo->panel); + + /* Disable/unprepare dvo clock */ + clk_disable_unprepare(dvo->clk_pix); + clk_disable_unprepare(dvo->clk); + + dvo->enabled = false; +} + +static void sti_dvo_pre_enable(struct drm_bridge *bridge) +{ + struct sti_dvo *dvo = bridge->driver_private; + struct dvo_config *config = dvo->config; + u32 val; + + DRM_DEBUG_DRIVER("\n"); + + if (dvo->enabled) + return; + + /* Make sure DVO is disabled */ + writel(0x00000000, dvo->regs + DVO_DOF_CFG); + writel(0x00000000, dvo->regs + DVO_AWG_DIGSYNC_CTRL); + + if (config->awg_fwgen_fct) { + u8 nb_instr; + u32 awg_ram_code[AWG_MAX_INST]; + /* Configure AWG */ + if (!dvo_awg_generate_code(dvo, &nb_instr, awg_ram_code)) + dvo_awg_configure(dvo, awg_ram_code, nb_instr); + else + return; + } + + /* Prepare/enable clocks */ + if (clk_prepare_enable(dvo->clk_pix)) + DRM_ERROR("Failed to prepare/enable dvo_pix clk\n"); + if (clk_prepare_enable(dvo->clk)) + DRM_ERROR("Failed to prepare/enable dvo clk\n"); + + if (dvo->panel) + dvo->panel->funcs->enable(dvo->panel); + + /* Set LUT */ + writel(config->lowbyte, dvo->regs + DVO_LUT_PROG_LOW); + writel(config->midbyte, dvo->regs + DVO_LUT_PROG_MID); + writel(config->highbyte, dvo->regs + DVO_LUT_PROG_HIGH); + + /* Digital output formatter config */ + val = (config->flags | DVO_DOF_EN); + writel(val, dvo->regs + DVO_DOF_CFG); + + dvo->enabled = true; +} + +static void sti_dvo_set_mode(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct sti_dvo *dvo = bridge->driver_private; + struct sti_mixer *mixer = to_sti_mixer(dvo->encoder->crtc); + int rate = mode->clock * 1000; + struct clk *clkp; + int ret; + + DRM_DEBUG_DRIVER("\n"); + + memcpy(&dvo->mode, mode, sizeof(struct drm_display_mode)); + + /* According to the path used (main or aux), the dvo clocks should + * have a different parent clock. */ + if (mixer->id == STI_MIXER_MAIN) + clkp = dvo->clk_main_parent; + else + clkp = dvo->clk_aux_parent; + + if (clkp) { + clk_set_parent(dvo->clk_pix, clkp); + clk_set_parent(dvo->clk, clkp); + } + + /* DVO clocks = compositor clock */ + ret = clk_set_rate(dvo->clk_pix, rate); + if (ret < 0) { + DRM_ERROR("Cannot set rate (%dHz) for dvo_pix clk\n", rate); + return; + } + + ret = clk_set_rate(dvo->clk, rate); + if (ret < 0) { + DRM_ERROR("Cannot set rate (%dHz) for dvo clk\n", rate); + return; + } + + /* For now, we only support 24bit data enable (DE) synchro format */ + dvo->config = &rgb_24bit_de_cfg; +} + +static void sti_dvo_bridge_nope(struct drm_bridge *bridge) +{ + /* do nothing */ +} + +static void sti_dvo_brigde_destroy(struct drm_bridge *bridge) +{ + drm_bridge_cleanup(bridge); + kfree(bridge); +} + +static const struct drm_bridge_funcs sti_dvo_bridge_funcs = { + .pre_enable = sti_dvo_pre_enable, + .enable = sti_dvo_bridge_nope, + .disable = sti_dvo_disable, + .post_disable = sti_dvo_bridge_nope, + .mode_set = sti_dvo_set_mode, + .destroy = sti_dvo_brigde_destroy, +}; + +static int sti_dvo_connector_get_modes(struct drm_connector *connector) +{ + struct sti_dvo_connector *dvo_connector + = to_sti_dvo_connector(connector); + struct sti_dvo *dvo = dvo_connector->dvo; + + if (dvo->panel) + return dvo->panel->funcs->get_modes(dvo->panel); + + return 0; +} + +#define CLK_TOLERANCE_HZ 50 + +static int sti_dvo_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + int target = mode->clock * 1000; + int target_min = target - CLK_TOLERANCE_HZ; + int target_max = target + CLK_TOLERANCE_HZ; + int result; + struct sti_dvo_connector *dvo_connector + = to_sti_dvo_connector(connector); + struct sti_dvo *dvo = dvo_connector->dvo; + + result = clk_round_rate(dvo->clk_pix, target); + + DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n", + target, result); + + if ((result < target_min) || (result > target_max)) { + DRM_DEBUG_DRIVER("dvo pixclk=%d not supported\n", target); + return MODE_BAD; + } + + return MODE_OK; +} + +struct drm_encoder *sti_dvo_best_encoder(struct drm_connector *connector) +{ + struct sti_dvo_connector *dvo_connector + = to_sti_dvo_connector(connector); + + /* Best encoder is the one associated during connector creation */ + return dvo_connector->encoder; +} + +static struct drm_connector_helper_funcs sti_dvo_connector_helper_funcs = { + .get_modes = sti_dvo_connector_get_modes, + .mode_valid = sti_dvo_connector_mode_valid, + .best_encoder = sti_dvo_best_encoder, +}; + +static enum drm_connector_status +sti_dvo_connector_detect(struct drm_connector *connector, bool force) +{ + struct sti_dvo_connector *dvo_connector + = to_sti_dvo_connector(connector); + struct sti_dvo *dvo = dvo_connector->dvo; + + DRM_DEBUG_DRIVER("\n"); + + if (!dvo->panel) + dvo->panel = of_drm_find_panel(dvo->panel_node); + + if (dvo->panel) + if (!drm_panel_attach(dvo->panel, connector)) + return connector_status_connected; + + return connector_status_disconnected; +} + +static void sti_dvo_connector_destroy(struct drm_connector *connector) +{ + struct sti_dvo_connector *dvo_connector + = to_sti_dvo_connector(connector); + + drm_connector_unregister(connector); + drm_connector_cleanup(connector); + kfree(dvo_connector); +} + +static struct drm_connector_funcs sti_dvo_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = sti_dvo_connector_detect, + .destroy = sti_dvo_connector_destroy, +}; + +static struct drm_encoder *sti_dvo_find_encoder(struct drm_device *dev) +{ + struct drm_encoder *encoder; + + list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { + if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS) + return encoder; + } + + return NULL; +} + +static int sti_dvo_bind(struct device *dev, struct device *master, void *data) +{ + struct sti_dvo *dvo = dev_get_drvdata(dev); + struct drm_device *drm_dev = data; + struct drm_encoder *encoder; + struct sti_dvo_connector *connector; + struct drm_connector *drm_connector; + struct drm_bridge *bridge; + int err; + + /* Set the drm device handle */ + dvo->drm_dev = drm_dev; + + encoder = sti_dvo_find_encoder(drm_dev); + if (!encoder) + return -ENOMEM; + + connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL); + if (!connector) + return -ENOMEM; + + connector->dvo = dvo; + + bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL); + if (!bridge) + return -ENOMEM; + + bridge->driver_private = dvo; + drm_bridge_init(drm_dev, bridge, &sti_dvo_bridge_funcs); + + encoder->bridge = bridge; + connector->encoder = encoder; + dvo->encoder = encoder; + + drm_connector = (struct drm_connector *)connector; + + drm_connector->polled = DRM_CONNECTOR_POLL_HPD; + + drm_connector_init(drm_dev, drm_connector, + &sti_dvo_connector_funcs, DRM_MODE_CONNECTOR_LVDS); + drm_connector_helper_add(drm_connector, + &sti_dvo_connector_helper_funcs); + + err = drm_connector_register(drm_connector); + if (err) + goto err_connector; + + err = drm_mode_connector_attach_encoder(drm_connector, encoder); + if (err) { + DRM_ERROR("Failed to attach a connector to a encoder\n"); + goto err_sysfs; + } + + return 0; + +err_sysfs: + drm_connector_unregister(drm_connector); +err_connector: + drm_bridge_cleanup(bridge); + drm_connector_cleanup(drm_connector); + return -EINVAL; +} + +static void sti_dvo_unbind(struct device *dev, + struct device *master, void *data) +{ + /* do nothing */ +} + +static const struct component_ops sti_dvo_ops = { + .bind = sti_dvo_bind, + .unbind = sti_dvo_unbind, +}; + +static int sti_dvo_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sti_dvo *dvo; + struct resource *res; + struct device_node *np = dev->of_node; + + DRM_INFO("%s\n", __func__); + + dvo = devm_kzalloc(dev, sizeof(*dvo), GFP_KERNEL); + if (!dvo) { + DRM_ERROR("Failed to allocate memory for DVO\n"); + return -ENOMEM; + } + + dvo->dev = pdev->dev; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvo-reg"); + if (!res) { + DRM_ERROR("Invalid dvo resource\n"); + return -ENOMEM; + } + dvo->regs = devm_ioremap_nocache(dev, res->start, + resource_size(res)); + if (IS_ERR(dvo->regs)) + return PTR_ERR(dvo->regs); + + dvo->clk_pix = devm_clk_get(dev, "dvo_pix"); + if (IS_ERR(dvo->clk_pix)) { + DRM_ERROR("Cannot get dvo_pix clock\n"); + return PTR_ERR(dvo->clk_pix); + } + + dvo->clk = devm_clk_get(dev, "dvo"); + if (IS_ERR(dvo->clk)) { + DRM_ERROR("Cannot get dvo clock\n"); + return PTR_ERR(dvo->clk); + } + + dvo->clk_main_parent = devm_clk_get(dev, "main_parent"); + if (IS_ERR(dvo->clk_main_parent)) { + DRM_DEBUG_DRIVER("Cannot get main_parent clock\n"); + dvo->clk_main_parent = NULL; + } + + dvo->clk_aux_parent = devm_clk_get(dev, "aux_parent"); + if (IS_ERR(dvo->clk_aux_parent)) { + DRM_DEBUG_DRIVER("Cannot get aux_parent clock\n"); + dvo->clk_aux_parent = NULL; + } + + dvo->panel_node = of_parse_phandle(np, "sti,panel", 0); + if (!dvo->panel_node) + DRM_ERROR("No panel associated to the dvo output\n"); + + platform_set_drvdata(pdev, dvo); + + return component_add(&pdev->dev, &sti_dvo_ops); +} + +static int sti_dvo_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &sti_dvo_ops); + return 0; +} + +static struct of_device_id dvo_of_match[] = { + { .compatible = "st,stih407-dvo", }, + { /* end node */ } +}; +MODULE_DEVICE_TABLE(of, dvo_of_match); + +struct platform_driver sti_dvo_driver = { + .driver = { + .name = "sti-dvo", + .owner = THIS_MODULE, + .of_match_table = dvo_of_match, + }, + .probe = sti_dvo_probe, + .remove = sti_dvo_remove, +}; + +module_platform_driver(sti_dvo_driver); + +MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard(a)st.com>"); +MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/sti/sti_tvout.c b/drivers/gpu/drm/sti/sti_tvout.c index cb924aa..5cc5311 100644 --- a/drivers/gpu/drm/sti/sti_tvout.c +++ b/drivers/gpu/drm/sti/sti_tvout.c @@ -48,6 +48,9 @@ #define TVO_HDMI_CLIP_VALUE_R_CR 0x514 #define TVO_HDMI_SYNC_SEL 0x518 #define TVO_HDMI_DFV_OBS 0x540 +#define TVO_VIP_DVO 0x600 +#define TVO_DVO_SYNC_SEL 0x618 +#define TVO_DVO_CONFIG 0x620 #define TVO_IN_FMT_SIGNED BIT(0) #define TVO_SYNC_EXT BIT(4) @@ -98,6 +101,9 @@ #define TVO_SYNC_HD_DCS_SHIFT 8 +#define TVO_SYNC_DVO_PAD_HSYNC_SHIFT 8 +#define TVO_SYNC_DVO_PAD_VSYNC_SHIFT 16 + #define ENCODER_CRTC_MASK (BIT(0) | BIT(1)) /* enum listing the supported output data format */ @@ -113,6 +119,7 @@ struct sti_tvout { struct reset_control *reset; struct drm_encoder *hdmi; struct drm_encoder *hda; + struct drm_encoder *dvo; }; struct sti_tvout_encoder { @@ -262,6 +269,66 @@ static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout, } /** + * Start VIP block for DVO output + * + * @tvout: pointer on tvout structure + * @main_path: true if main path has to be used in the vip configuration + * else aux path is used. + */ +static void tvout_dvo_start(struct sti_tvout *tvout, bool main_path) +{ + struct device_node *node = tvout->dev->of_node; + bool sel_input_logic_inverted = false; + u32 tvo_in_vid_format; + int val; + + dev_dbg(tvout->dev, "%s\n", __func__); + + if (main_path) { + DRM_DEBUG_DRIVER("main vip for DVO\n"); + /* Select the input sync for dvo = VTG set 4 */ + val = TVO_SYNC_MAIN_VTG_SET_4 << TVO_SYNC_DVO_PAD_VSYNC_SHIFT; + val |= TVO_SYNC_MAIN_VTG_SET_4 << TVO_SYNC_DVO_PAD_HSYNC_SHIFT; + val |= TVO_SYNC_MAIN_VTG_SET_4; + tvout_write(tvout, val, TVO_DVO_SYNC_SEL); + tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT; + } else { + DRM_DEBUG_DRIVER("aux vip for DVO\n"); + /* Select the input sync for dvo = VTG set 4 */ + val = TVO_SYNC_AUX_VTG_SET_4 << TVO_SYNC_DVO_PAD_VSYNC_SHIFT; + val |= TVO_SYNC_AUX_VTG_SET_4 << TVO_SYNC_DVO_PAD_HSYNC_SHIFT; + val |= TVO_SYNC_AUX_VTG_SET_4; + tvout_write(tvout, val, TVO_DVO_SYNC_SEL); + tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT; + } + + /* Set color channel order */ + tvout_vip_set_color_order(tvout, TVO_VIP_DVO, + TVO_VIP_REORDER_CR_R_SEL, + TVO_VIP_REORDER_Y_G_SEL, + TVO_VIP_REORDER_CB_B_SEL); + + /* Set clipping mode (Limited range RGB/Y) */ + tvout_vip_set_clip_mode(tvout, TVO_VIP_DVO, + TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y); + + /* Set round mode (rounded to 8-bit per component) */ + tvout_vip_set_rnd(tvout, TVO_VIP_DVO, TVO_VIP_RND_8BIT_ROUNDED); + + if (of_device_is_compatible(node, "st,stih407-tvout")) { + /* Set input video format */ + tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, + TVO_IN_FMT_SIGNED); + sel_input_logic_inverted = true; + } + + /* Input selection */ + tvout_vip_set_sel_input(tvout, TVO_VIP_DVO, main_path, + sel_input_logic_inverted, + STI_TVOUT_VIDEO_OUT_RGB); +} + +/** * Start VIP block for HDMI output * * @tvout: pointer on tvout structure @@ -402,6 +469,56 @@ static const struct drm_encoder_funcs sti_tvout_encoder_funcs = { .destroy = sti_tvout_encoder_destroy, }; +static void sti_dvo_encoder_commit(struct drm_encoder *encoder) +{ + struct sti_tvout *tvout = to_sti_tvout(encoder); + + tvout_dvo_start(tvout, sti_drm_crtc_is_main(encoder->crtc)); +} + +static void sti_dvo_encoder_disable(struct drm_encoder *encoder) +{ + struct sti_tvout *tvout = to_sti_tvout(encoder); + + /* Reset VIP register */ + tvout_write(tvout, 0x0, TVO_VIP_DVO); +} + +static const struct drm_encoder_helper_funcs sti_dvo_encoder_helper_funcs = { + .dpms = sti_tvout_encoder_dpms, + .mode_fixup = sti_tvout_encoder_mode_fixup, + .mode_set = sti_tvout_encoder_mode_set, + .prepare = sti_tvout_encoder_prepare, + .commit = sti_dvo_encoder_commit, + .disable = sti_dvo_encoder_disable, +}; + +static struct drm_encoder * +sti_tvout_create_dvo_encoder(struct drm_device *dev, + struct sti_tvout *tvout) +{ + struct sti_tvout_encoder *encoder; + struct drm_encoder *drm_encoder; + + encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL); + if (!encoder) + return NULL; + + encoder->tvout = tvout; + + drm_encoder = (struct drm_encoder *)encoder; + + drm_encoder->possible_crtcs = ENCODER_CRTC_MASK; + drm_encoder->possible_clones = 1 << 0; + + drm_encoder_init(dev, drm_encoder, + &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_LVDS); + + drm_encoder_helper_add(drm_encoder, &sti_dvo_encoder_helper_funcs); + + return drm_encoder; +} + static void sti_hda_encoder_commit(struct drm_encoder *encoder) { struct sti_tvout *tvout = to_sti_tvout(encoder); @@ -508,6 +625,7 @@ static void sti_tvout_create_encoders(struct drm_device *dev, { tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout); tvout->hda = sti_tvout_create_hda_encoder(dev, tvout); + tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout); } static void sti_tvout_destroy_encoders(struct sti_tvout *tvout) -- 1.9.1

11 years, 1 month

Re: [Linaro-mm-sig] [PATCH 0/7] Generic dmabuf protocol RFCv1

by Pekka Paalanen

Hi, I'm adding more people to CC who have commented on Wayland dmabuf attempts before and might be interested. If you want to keep updated without monitoring wayland-devel@, you could subscribe to https://bugs.freedesktop.org/show_bug.cgi?id=83881 Thanks, pq On Fri, 12 Dec 2014 16:51:01 -0500 Louis-Francis Ratté-Boulianne <lfrb(a)collabora.com> wrote: > This serie of patches by Pekka and George contains an experimental > implementation of "zlinux_dmabuf" protocol. > > See these links for more information about the design and failed previous > attempts: > > http://lists.freedesktop.org/archives/wayland-devel/2014-June/015362.html > https://bugs.freedesktop.org/show_bug.cgi?id=83881 > > This protocol allows clients to wrap a dmabuf into a wl_buffer, and push that > into the compositor for display. The compositor then uses GBM to import that > wl_buffer as a bo for compositing with GL (via EGLImage) or direct scanout as a > DRM FB object. > > Note that a round-trip is needed when creating the buffer because there is no > way to communicate all dmabuf constraints from the compositor to a client > before-hand. They are simply too complicated and changing to be described in > a Wayland protocol extension. In fact, there are existing APIs like EGL (the > dmabuf import extension) that are based on trial-and-error rather than knowing > the constraints before-hand. > > However, the protocol design is far far away from complete. Even the kernel > developers are still discussing, how cross-device support for dmabufs should > work, and what is the proper information split between the kernel and the user > space. How do you communicate, or even describe, things like tiling formats. > > But, we should start from somewhere, and this patch is pushing the user space > part forward a bit. > > The extension is especially useful for video players and this pipeline has been > demonstrated to work with GStreamer: > > http://cgit.collabora.com/git/user/gkiagia/gst-plugins-bad.git/commit/?h=in… > > > George Kiagiadakis (1): > clients: add simple-dmabuf client > > Pekka Paalanen (6): > protocol: add linux_dmabuf extension RFCv1 > dmabuf: implement linux_dmabuf extension > gl-renderer: add dmabuf import > compositor-x11: init linux_dmabuf support > compositor-drm: init linux_dmabuf support > compositor-drm: dmabuf GBM import > > .gitignore | 1 + > Makefile.am | 24 +- > clients/simple-dmabuf.c | 578 ++++++++++++++++++++++++++++++++++++++++++++++ > configure.ac | 9 + > protocol/linux-dmabuf.xml | 224 ++++++++++++++++++ > src/compositor-drm.c | 31 ++- > src/compositor-x11.c | 5 + > src/gl-renderer.c | 103 +++++++++ > src/linux-dmabuf.c | 322 ++++++++++++++++++++++++++ > src/linux-dmabuf.h | 45 ++++ > 10 files changed, 1336 insertions(+), 6 deletions(-) > create mode 100644 clients/simple-dmabuf.c > create mode 100644 protocol/linux-dmabuf.xml > create mode 100644 src/linux-dmabuf.c > create mode 100644 src/linux-dmabuf.h >

11 years, 1 month

[PATCH] drm: sti: fix module compilation issue

by Benjamin Gaignard

When compiling in module some symbol aren't missing, export them correctly. Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- drivers/gpu/drm/sti/sti_drm_plane.c | 1 + drivers/gpu/drm/sti/sti_hqvdp.c | 1 + drivers/gpu/drm/sti/sti_layer.c | 2 ++ 3 files changed, 4 insertions(+) diff --git a/drivers/gpu/drm/sti/sti_drm_plane.c b/drivers/gpu/drm/sti/sti_drm_plane.c index c9dd0e5..bb6a293 100644 --- a/drivers/gpu/drm/sti/sti_drm_plane.c +++ b/drivers/gpu/drm/sti/sti_drm_plane.c @@ -194,3 +194,4 @@ struct drm_plane *sti_drm_plane_init(struct drm_device *dev, return &layer->plane; } +EXPORT_SYMBOL(sti_drm_plane_init); diff --git a/drivers/gpu/drm/sti/sti_hqvdp.c b/drivers/gpu/drm/sti/sti_hqvdp.c index 200d020..f3db05d 100644 --- a/drivers/gpu/drm/sti/sti_hqvdp.c +++ b/drivers/gpu/drm/sti/sti_hqvdp.c @@ -816,6 +816,7 @@ struct sti_layer *sti_hqvdp_create(struct device *dev) return &hqvdp->layer; } +EXPORT_SYMBOL(sti_hqvdp_create); static void sti_hqvdp_init_plugs(struct sti_hqvdp *hqvdp) { diff --git a/drivers/gpu/drm/sti/sti_layer.c b/drivers/gpu/drm/sti/sti_layer.c index 480ec1c..899104f 100644 --- a/drivers/gpu/drm/sti/sti_layer.c +++ b/drivers/gpu/drm/sti/sti_layer.c @@ -40,6 +40,7 @@ const char *sti_layer_to_str(struct sti_layer *layer) return "<UNKNOWN LAYER>"; } } +EXPORT_SYMBOL(sti_layer_to_str); struct sti_layer *sti_layer_create(struct device *dev, int desc, void __iomem *baseaddr) @@ -77,6 +78,7 @@ struct sti_layer *sti_layer_create(struct device *dev, int desc, return layer; } +EXPORT_SYMBOL(sti_layer_create); int sti_layer_prepare(struct sti_layer *layer, struct drm_crtc *crtc, -- 1.9.1

11 years, 1 month

[PATCH 0/9] fixes for STI drm driver

by Benjamin Gaignard

This series of patches fix various issues in STI drm driver. Now HDMI i2c adapter could be selected in device tree and plug detection doesn't use gpio anymore. I also had fix some signal timing problems after testing the driver on more hardware. The remaining patches attemps to simplify the code and prepare the next evolutions like DVO and auxiliary CRTC support The changes could be fetch here: http://git.linaro.org/people/benjamin.gaignard/kernel.git on drm-sti-fixes-2014-12-04 branch Benjamin Gaignard (9): drm: sti: allow to change hdmi ddc i2c adapter drm: sti: remove gpio for HDMI hot plug detection drm: sti: clear all mixer control drm: sti: simplify gdp code drm: sti: remove event lock while disabling vblank drm: sti: fix hdmi avi infoframe drm: sti: use drm_crtc_vblank_{on/off} instead of drm_vblank_{on/off} drm: sti: prepare sti_tvout to support auxiliary crtc drm: sti: fix delay in VTG programming .../devicetree/bindings/gpu/st,stih4xx.txt | 3 +- drivers/gpu/drm/sti/sti_drm_crtc.c | 10 +-- drivers/gpu/drm/sti/sti_gdp.c | 39 ++++----- drivers/gpu/drm/sti/sti_hdmi.c | 84 +++++++++++--------- drivers/gpu/drm/sti/sti_hdmi.h | 6 +- drivers/gpu/drm/sti/sti_mixer.c | 9 +++ drivers/gpu/drm/sti/sti_mixer.h | 1 + drivers/gpu/drm/sti/sti_tvout.c | 92 ++++++++++++---------- drivers/gpu/drm/sti/sti_vtg.c | 25 +++++- 9 files changed, 160 insertions(+), 109 deletions(-) -- 1.9.1

11 years, 2 months

[PATCH v2 00/18] Exynos SYSMMU (IOMMU) integration with DT and DMA-mapping subsystem

by Marek Szyprowski

Hello Everyone, This is yet another attempt to finally make Exynos SYSMMU driver fully integrated with DMA-mapping subsystem. Previous approach is available here: https://lkml.org/lkml/2014/8/5/183 I meantime, there have been a discussion about the way the iommu driver should be integrated with dma-mapping subsystem, which resulted in "[RFC PATCH v3 0/7] Introduce automatic DMA configuration for IOMMU masters" patches prepared by Will Deacon: http://www.spinics.net/lists/arm-kernel/msg362076.html Those patches removed the need to use bus-specific notifiers for initialization. Main changes since previous version of my patches: 1. rebased onto "[RFC PATCH v3 0/7] Introduce automatic DMA configuration for IOMMU masters" patches, changed initialization from bus notifiers to DT related callbacks 2. removed support for separate IO address spaces - this will be discussed separately after the basic support gets merged 3. removed support for power domain notifier-based runtime power management - this also will be discussed separately later I hope that the driver with above changes will be easier to be merged to v3.18. Best regards Marek Szyprowski Samsung R&D Institute Poland Patch summary: Marek Szyprowski (18): arm: dma-mapping: arm_iommu_attach_device: automatically set max_seg_size arm: exynos: bind power domains earlier, on device creation drm: exynos: detach from default dma-mapping domain on init clk: exynos: add missing smmu_g2d clock and update comments ARM: DTS: Exynos4: add System MMU nodes iommu: exynos: don't read version register on every tlb operation iommu: exynos: remove unused functions iommu: exynos: remove useless spinlock iommu: exynos: refactor function parameters to simplify code iommu: exynos: remove unused functions, part 2 iommu: exynos: remove useless device_add/remove callbacks iommu: exynos: add support for binding more than one sysmmu to master device iommu: exynos: add support for runtime_pm iommu: exynos: rename variables to reflect their purpose iommu: exynos: document internal structures iommu: exynos: remove excessive includes and sort others alphabetically iommu: exynos: init from dt-specific callback instead of initcall iommu: exynos: add callback for initializing devices from device tree arch/arm/boot/dts/exynos4.dtsi | 117 +++++++ arch/arm/boot/dts/exynos4210.dtsi | 23 ++ arch/arm/boot/dts/exynos4x12.dtsi | 82 +++++ arch/arm/mach-exynos/pm_domains.c | 12 +- arch/arm/mm/dma-mapping.c | 16 + drivers/clk/samsung/clk-exynos4.c | 1 + drivers/gpu/drm/exynos/exynos_drm_iommu.c | 3 + drivers/iommu/exynos-iommu.c | 494 ++++++++++++++---------------- include/dt-bindings/clock/exynos4.h | 10 +- 9 files changed, 483 insertions(+), 275 deletions(-) -- 1.9.2

11 years, 3 months

[PATCH v2 0/3] CMA & device tree, another approach

by Marek Szyprowski

Hello, This is another approach to finish support for reserved memory regions defined in device tree. Previous attempts (http://lists.linaro.org/pipermail/linaro-mm-sig/2014-February/003738.html and https://lkml.org/lkml/2014/7/14/108) ended in merging parts of the code and documentation. Merged patches allow to reserve memory, but there is still no reserved memory drivers nor any code that actually uses reserved memory regions. The final conclusion from the above mentioned threads is that there is no automated reserved memory initialization. All drivers that want to use reserved memory, should initialize it on their own. This patch series provides two driver for reserved memory regions (one based on CMA and one based on dma_coherent allocator). The main improvement comparing to the previous version is removal of automated reserved memory for every device and support for named memory regions. Those patches are for merging, rebased on top of recent linux-next tree. Best regards Marek Szyprowski Samsung R&D Institute Poland Changes since v1 (https://lkml.org/lkml/2014/8/26/339): - removed patches for named reserved regions - they will be discussed separately - added a check for 'no-map' property to dma coherent allocator (suggested by Laura Abbott) - removed example code for s5p-mfc driver Changes since '[PATCH v2 RESEND 0/4] CMA & device tree, once again' version: (https://lkml.org/lkml/2014/7/14/108) - added return error value to of_reserved_mem_device_init() - added support for named memory regions (so more than one region can be defined per device) - added usage example - converted custom reserved memory code used by s5p-mfc driver to the generic reserved memory handling code Patch summary: Marek Szyprowski (3): drivers: of: add return value to of_reserved_mem_device_init drivers: dma-coherent: add initialization from device tree drivers: dma-contiguous: add initialization from device tree drivers/base/dma-coherent.c | 145 ++++++++++++++++++++++++++++++++++------ drivers/base/dma-contiguous.c | 71 ++++++++++++++++++++ drivers/of/of_reserved_mem.c | 3 +- include/linux/cma.h | 3 + include/linux/of_reserved_mem.h | 9 ++- mm/cma.c | 62 ++++++++++++++--- 6 files changed, 259 insertions(+), 34 deletions(-) -- 1.9.2

11 years, 3 months

[PATCH] drm: sti: remove gpio for HDMI hot plug detection

by Benjamin Gaignard

gpio used for HDMI hot plug detection is useless, HDMI_STI register contains an hot plug detection status bit. Fix binding documentation. Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- Documentation/devicetree/bindings/gpu/st,stih4xx.txt | 2 -- drivers/gpu/drm/sti/sti_hdmi.c | 11 ++--------- drivers/gpu/drm/sti/sti_hdmi.h | 5 +++-- 3 files changed, 5 insertions(+), 13 deletions(-) diff --git a/Documentation/devicetree/bindings/gpu/st,stih4xx.txt b/Documentation/devicetree/bindings/gpu/st,stih4xx.txt index 8885d9e..32cfc7b 100644 --- a/Documentation/devicetree/bindings/gpu/st,stih4xx.txt +++ b/Documentation/devicetree/bindings/gpu/st,stih4xx.txt @@ -68,7 +68,6 @@ STMicroelectronics stih4xx platforms number of clocks may depend of the SoC type. - clock-names: names of the clocks listed in clocks property in the same order. - - hdmi,hpd-gpio: gpio id to detect if an hdmi cable is plugged or not. - ddc: phandle of an I2C controller used for DDC EDID probing sti-hda: @@ -174,7 +173,6 @@ Example: interrupt-names = "irq"; clock-names = "pix", "tmds", "phy", "audio"; clocks = <&clockgen_c_vcc CLK_S_PIX_HDMI>, <&clockgen_c_vcc CLK_S_TMDS_HDMI>, <&clockgen_c_vcc CLK_S_HDMI_REJECT_PLL>, <&clockgen_b1 CLK_S_PCM_0>; - hdmi,hpd-gpio = <&PIO2 5>; }; sti-hda@fe85a000 { diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c index 7673189..09f39c5 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -130,8 +130,7 @@ static irqreturn_t hdmi_irq_thread(int irq, void *arg) /* Hot plug/unplug IRQ */ if (hdmi->irq_status & HDMI_INT_HOT_PLUG) { - /* read gpio to get the status */ - hdmi->hpd = gpio_get_value(hdmi->hpd_gpio); + hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG; if (hdmi->drm_dev) drm_helper_hpd_irq_event(hdmi->drm_dev); } @@ -767,13 +766,7 @@ static int sti_hdmi_probe(struct platform_device *pdev) return PTR_ERR(hdmi->clk_audio); } - hdmi->hpd_gpio = of_get_named_gpio(np, "hdmi,hpd-gpio", 0); - if (hdmi->hpd_gpio < 0) { - DRM_ERROR("Failed to get hdmi hpd-gpio\n"); - return -EIO; - } - - hdmi->hpd = gpio_get_value(hdmi->hpd_gpio); + hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG; init_waitqueue_head(&hdmi->wait_event); diff --git a/drivers/gpu/drm/sti/sti_hdmi.h b/drivers/gpu/drm/sti/sti_hdmi.h index d00a3e0..3d22390 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.h +++ b/drivers/gpu/drm/sti/sti_hdmi.h @@ -14,6 +14,9 @@ #define HDMI_STA 0x0010 #define HDMI_STA_DLL_LCK BIT(5) +#define HDMI_STA_HOT_PLUG_SHIFT 4 +#define HDMI_STA_HOT_PLUG (1 << HDMI_STA_HOT_PLUG_SHIFT) + struct sti_hdmi; struct hdmi_phy_ops { @@ -37,7 +40,6 @@ struct hdmi_phy_ops { * @irq_status: interrupt status register * @phy_ops: phy start/stop operations * @enabled: true if hdmi is enabled else false - * @hpd_gpio: hdmi hot plug detect gpio number * @hpd: hot plug detect status * @wait_event: wait event * @event_received: wait event status @@ -57,7 +59,6 @@ struct sti_hdmi { u32 irq_status; struct hdmi_phy_ops *phy_ops; bool enabled; - int hpd_gpio; bool hpd; wait_queue_head_t wait_event; bool event_received; -- 1.9.1

11 years, 3 months

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