From: Jianwei Wang jianwei.wang.chn@gmail.com
Switch update interrupt mask bit with regmap_update_bits, and clear interrupt status by writing 1 to relevant bit before setting mask in fsl_dcu_drm_irq_init function.
Signed-off-by: JianWei Wang jianwei.wang.chn@gmail.com Signed-off-by: Meng Yi meng.yi@nxp.com --- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 26 +++++++------------------- 1 file changed, 7 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c index fca97d3..cbef47c 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -38,21 +38,17 @@ static const struct regmap_config fsl_dcu_regmap_config = { static int fsl_dcu_drm_irq_init(struct drm_device *dev) { struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; - unsigned int value; int ret;
ret = drm_irq_install(dev, fsl_dev->irq); if (ret < 0) dev_err(dev->dev, "failed to install IRQ handler\n");
- ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0); + ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff); if (ret) dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); - ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); - if (ret) - dev_err(dev->dev, "read DCU_INT_MASK failed\n"); - value &= DCU_INT_MASK_VBLANK; - ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); + ret = regmap_update_bits(fsl_dev->regmap, DCU_INT_MASK, + DCU_INT_MASK_VBLANK, ~DCU_INT_MASK_VBLANK); if (ret) dev_err(dev->dev, "set DCU_INT_MASK failed\n"); ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, @@ -143,14 +139,10 @@ static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg) static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) { struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; - unsigned int value; int ret;
- ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); - if (ret) - dev_err(dev->dev, "read DCU_INT_MASK failed\n"); - value &= ~DCU_INT_MASK_VBLANK; - ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); + ret = regmap_update_bits(fsl_dev->regmap, DCU_INT_MASK, + DCU_INT_MASK_VBLANK, ~DCU_INT_MASK_VBLANK); if (ret) dev_err(dev->dev, "set DCU_INT_MASK failed\n"); return 0; @@ -160,14 +152,10 @@ static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, unsigned int pipe) { struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; - unsigned int value; int ret;
- ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); - if (ret) - dev_err(dev->dev, "read DCU_INT_MASK failed\n"); - value |= DCU_INT_MASK_VBLANK; - ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); + ret = regmap_update_bits(fsl_dev->regmap, DCU_INT_MASK, + DCU_INT_MASK_VBLANK, DCU_INT_MASK_VBLANK); if (ret) dev_err(dev->dev, "set DCU_INT_MASK failed\n"); }
The SiI9022A is an ultra low-power HDMI transmitter. It supports resolutions from standard definition 480i/p and 576i/p all the way to high-definition 720p, 1080i, and 1080p, the highest resolution supported by HDTVs today. It also supports all PC resolutions up to UXGA for netbooks
Signed-off-by: Meng Yi meng.yi@nxp.com --- arch/arm/boot/dts/ls1021a-twr.dts | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/arch/arm/boot/dts/ls1021a-twr.dts b/arch/arm/boot/dts/ls1021a-twr.dts index fad2e3b..462b6a1 100644 --- a/arch/arm/boot/dts/ls1021a-twr.dts +++ b/arch/arm/boot/dts/ls1021a-twr.dts @@ -57,6 +57,17 @@ enet1_sgmii_phy = &sgmii_phy0; };
+ hdmi-out { + compatible = "hdmi-connector"; + type = "a"; + + port { + hdmi_con: endpoint { + remote-endpoint = <&sii9022a_out>; + }; + }; + }; + sys_mclk: clock-mclk { compatible = "fixed-clock"; #clock-cells = <0>; @@ -180,6 +191,24 @@ VDDIO-supply = <®_3p3v>; clocks = <&sys_mclk 1>; }; + + sii9022a: hdmi@39 { + compatible = "sil,sii9022a"; + reg = <0x39>; + interrupts = <GIC_SPI 167 IRQ_TYPE_EDGE_RISING>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <1>; + sii9022a_out: endpoint { + remote-endpoint = <&hdmi_con>; + }; + }; + }; + }; };
&ifc {
The SiI9022A is an ultra low-power HDMI transmitter. It supports resolutions from standard definition 480i/p and 576i/p all the way to high-definition 720p, 1080i, and 1080p, the highest resolution supported by HDTVs today. It also supports all PC resolutions up to UXGA for netbooks
Signed-off-by: Meng Yi meng.yi@nxp.com --- drivers/gpu/drm/i2c/Kconfig | 6 + drivers/gpu/drm/i2c/Makefile | 3 + drivers/gpu/drm/i2c/sii9022_drv.c | 449 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 458 insertions(+) create mode 100644 drivers/gpu/drm/i2c/sii9022_drv.c
diff --git a/drivers/gpu/drm/i2c/Kconfig b/drivers/gpu/drm/i2c/Kconfig index 22c7ed6..8646729 100644 --- a/drivers/gpu/drm/i2c/Kconfig +++ b/drivers/gpu/drm/i2c/Kconfig @@ -31,4 +31,10 @@ config DRM_I2C_NXP_TDA998X help Support for NXP Semiconductors TDA998X HDMI encoders.
+config DRM_I2C_SII9022 + tristate "Silicon Image sii9022 TMDS transmitter" + help + Support for sii9022 and similar single-link (or dual-link + when used in pairs) TMDS transmitters. + endmenu diff --git a/drivers/gpu/drm/i2c/Makefile b/drivers/gpu/drm/i2c/Makefile index 2c72eb5..cf2e8b9 100644 --- a/drivers/gpu/drm/i2c/Makefile +++ b/drivers/gpu/drm/i2c/Makefile @@ -10,3 +10,6 @@ obj-$(CONFIG_DRM_I2C_SIL164) += sil164.o
tda998x-y := tda998x_drv.o obj-$(CONFIG_DRM_I2C_NXP_TDA998X) += tda998x.o + +sii9022-y := sii9022_drv.o +obj-$(CONFIG_DRM_I2C_SII9022) +=sii9022.o diff --git a/drivers/gpu/drm/i2c/sii9022_drv.c b/drivers/gpu/drm/i2c/sii9022_drv.c new file mode 100644 index 0000000..bc49cad --- /dev/null +++ b/drivers/gpu/drm/i2c/sii9022_drv.c @@ -0,0 +1,449 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * Freescale DCU drm device driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/fb.h> +#include <linux/fsl_devices.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/backlight.h> +#include <video/videomode.h> +#include <video/of_display_timing.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_encoder_slave.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> + + +#define SII902X_INPUT_BUS_FMT 0x08 +#define SII902X_TPI_AVI_INPUT_FMT 0x09 +#define SII902X_TPI_AVI_OUTPUT_FMT 0x0A +#define SII902X_SYS_CONTROL 0x1A +#define SII902X_SYS_CTR_DDC_REQ BIT(2) +#define SII902X_SYS_CTR_DDC_BUS_AVAI (BIT(2) | BIT(1)) +#define SII902X_TPI_FAMILY_DEV_ID 0x1B +#define SII902X_TPI_DEV_REV_ID 0x1C +#define SII902X_TPI_REV_LEVEL_ID 0x1D +#define SII902X_POWER_STATE 0x1E +#define SII902X_TPI_AUDIO_CFG0 0x24 +#define SII902X_TPI_AUDIO_CFG1 0x25 +#define SII902X_TPI_AUDIO_CFG2 0x26 +#define SII902X_TPI_AUDIO_CFG3 0x27 +#define SII902X_TPI_HDCP_REV 0x30 +#define SII902X_TPI_INT_ENABLE 0x3C +#define SII902X_TPI_INT_STATUS 0x3D +#define SII902X_TPI_INT_PLUG_IN BIT(2) +#define SII902X_GENERAL_PURPOSE_IO0 0xBC +#define SII902X_GENERAL_PURPOSE_IO1 0xBD +#define SII902X_GENERAL_PURPOSE_IO2 0xBE +#define SII902X_TRANS_MODE_DIFF 0xC7 + +bool g_enable_hdmi; + +struct sii902x_data { + struct i2c_client *client; + struct delayed_work det_work; + struct fb_info *fbi; +} *sii902x; + +#define to_sii902x_data(x) \ + ((struct sii902x_data *)to_encoder_slave(x)->slave_priv) + +static struct i2c_client *sii902x_to_i2c(struct sii902x_data *sii902x) +{ + return sii902x->client; +} + +/* HW access functions */ +static s32 sii902x_write(const struct i2c_client *client, + u8 command, u8 value) +{ + return i2c_smbus_write_byte_data(client, command, value); +} + +static s32 sii902x_read(const struct i2c_client *client, u8 command) +{ + int val; + + val = i2c_smbus_read_word_data(client, command); + + return val & 0xff; +} + +static void sii902x_poweron(void) +{ + /* Turn on DVI or HDMI */ + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, 0x00); +} + +static void sii902x_poweroff(void) +{ + /* disable tmds before changing resolution */ + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, 0x10); +} + + +static void sii902x_chip_id(struct sii902x_data *sii902x) +{ + struct i2c_client *client = sii902x_to_i2c(sii902x); + int val; + + /* read device ID */ + val = sii902x_read(client, SII902X_TPI_FAMILY_DEV_ID); + pr_info("Sii902x: read id = 0x%02X", val); + val = sii902x_read(client, SII902X_TPI_DEV_REV_ID); + pr_info("-0x%02X", val); + val = sii902x_read(client, SII902X_TPI_REV_LEVEL_ID); + pr_info("-0x%02X", val); + val = sii902x_read(client, SII902X_TPI_HDCP_REV); + pr_info("-0x%02X\n", val); +} + +static int sii902x_initialize(struct sii902x_data *sii902x) +{ + struct i2c_client *client = sii902x_to_i2c(sii902x); + int ret, cnt; + + for (cnt = 0; cnt < 5; cnt++) { + /* Set 902x in hardware TPI mode on and jump out of D3 state */ + ret = sii902x_write(client, SII902X_TRANS_MODE_DIFF, 0x00); + if (ret < 0) + break; + } + if (ret != 0) + dev_err(&client->dev, "cound not find device\n"); + + return ret; +} + +static void sii902x_enable_source(struct sii902x_data *sii902x) +{ + struct i2c_client *client = sii902x_to_i2c(sii902x); + int val; + + sii902x_write(client, SII902X_GENERAL_PURPOSE_IO0, 0x01); + sii902x_write(client, SII902X_GENERAL_PURPOSE_IO1, 0x82); + val = sii902x_read(client, SII902X_GENERAL_PURPOSE_IO2); + val |= 0x1; + sii902x_write(client, SII902X_GENERAL_PURPOSE_IO2, val); +} + +static void sii902x_power_up_tx(struct sii902x_data *sii902x) +{ + struct i2c_client *client = sii902x_to_i2c(sii902x); + int val; + + val = sii902x_read(client, SII902X_POWER_STATE); + val &= ~0x3; + sii902x_write(client, SII902X_POWER_STATE, val); +} + +static int sii902x_get_edid_preconfig(void) +{ + int old, dat, ret = 0, cnt = 100; + + old = sii902x_read(sii902x->client, SII902X_SYS_CONTROL); + + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, + old | SII902X_SYS_CTR_DDC_REQ); + do { + cnt--; + msleep(20); + dat = sii902x_read(sii902x->client, SII902X_SYS_CONTROL); + } while ((!(dat & 0x2)) && cnt); + + if (!cnt) { + ret = -1; + goto done; + } + + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, + old | SII902X_SYS_CTR_DDC_BUS_AVAI); + +done: + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, old); + return ret; +} + +static int __init enable_hdmi_setup(char *str) +{ + g_enable_hdmi = true; + + return 1; +} + +__setup("hdmi", enable_hdmi_setup); + +static irqreturn_t sii902x_detect_handler(int irq, void *data) +{ + if (g_enable_hdmi) + g_enable_hdmi = false; + + return IRQ_HANDLED; +} + +static int sii902x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adap = to_i2c_adapter(client->dev.parent); + int ret, err; + + if (!g_enable_hdmi) + return -EPERM; + + if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_BYTE)) { + dev_err(&client->dev, "i2c_check_functionality error\n"); + return -ENODEV; + } + + sii902x = devm_kzalloc(&client->dev, sizeof(*sii902x), GFP_KERNEL); + if (!sii902x) + return -ENOMEM; + + sii902x->client = client; + i2c_set_clientdata(client, sii902x); + + err = sii902x_initialize(sii902x); + if (err) + return err; + + sii902x_chip_id(sii902x); + sii902x_power_up_tx(sii902x); + sii902x_enable_source(sii902x); + + if (sii902x_get_edid_preconfig() < 0) + dev_warn(&client->dev, "Read edid preconfig failed\n"); + + if (client->irq) { + ret = devm_request_irq(&client->dev, client->irq, + sii902x_detect_handler, 0, + "SII902x_det", sii902x); + if (ret < 0) + dev_warn(&client->dev, + "cound not request det irq %d\n", + client->irq); + else { + /*enable cable hot plug irq*/ + sii902x_write(client, SII902X_TPI_INT_ENABLE, 0x01); + } + } + + return 0; +} + +static int sii902x_remove(struct i2c_client *client) +{ + sii902x_poweroff(); + return 0; +} + +/* DRM encoder functions */ + +static void +sii902x_encoder_dpms(struct drm_encoder *encoder, int mode) +{ + if (mode == DRM_MODE_DPMS_ON) + sii902x_poweron(); + else + sii902x_poweroff(); +} + + +static int +sii902x_encoder_mode_valid(struct drm_encoder *encoder, + struct drm_display_mode *mode) +{ + return 0; +} + +static void +sii902x_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct videomode vm; + u16 data[4]; + u32 refresh; + u8 *tmp; + int i; + + /* Power up */ + sii902x_power_up_tx(sii902x); + + drm_display_mode_to_videomode(mode, &vm); + data[0] = PICOS2KHZ(vm.pixelclock) / 10; + data[2] = vm.hsync_len + vm.hback_porch + + vm.hactive + vm.hfront_porch; + data[3] = vm.vsync_len + vm.vfront_porch + + vm.vactive + vm.vback_porch; + refresh = data[2] * data[3]; + refresh = (PICOS2KHZ(vm.pixelclock) * 1000) / refresh; + data[1] = refresh * 100; + + tmp = (u8 *)data; + for (i = 0; i < 8; i++) + sii902x_write(sii902x->client, i, tmp[i]); + + /* input bus/pixel: full pixel wide (24bit), rising edge */ + sii902x_write(sii902x->client, SII902X_INPUT_BUS_FMT, 0x70); + /* Set input format to RGB */ + sii902x_write(sii902x->client, SII902X_TPI_AVI_INPUT_FMT, 0x00); + /* set output format to RGB */ + sii902x_write(sii902x->client, SII902X_TPI_AVI_OUTPUT_FMT, 0x00); + /* audio setup */ + sii902x_write(sii902x->client, SII902X_TPI_AUDIO_CFG1, 0x00); + sii902x_write(sii902x->client, SII902X_TPI_AUDIO_CFG2, 0x40); + sii902x_write(sii902x->client, SII902X_TPI_AUDIO_CFG3, 0x00); +} + +struct edid *sii902x_drm_get_edid(struct drm_connector *connector, + struct i2c_adapter *adapter) +{ + int old, dat, cnt = 100; + struct edid *edid; + + old = sii902x_read(sii902x->client, SII902X_SYS_CONTROL); + + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, + old | SII902X_SYS_CTR_DDC_REQ); + do { + cnt--; + msleep(20); + dat = sii902x_read(sii902x->client, SII902X_SYS_CONTROL); + } while ((!(dat & 0x2)) && cnt); + + if (!cnt) { + edid = NULL; + goto done; + } + + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, + old | SII902X_SYS_CTR_DDC_BUS_AVAI); + + /* edid reading */ + edid = drm_get_edid(connector, adapter); + + cnt = 100; + do { + cnt--; + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, + old & ~SII902X_SYS_CTR_DDC_BUS_AVAI); + msleep(20); + dat = sii902x_read(sii902x->client, SII902X_SYS_CONTROL); + } while ((dat & 0x6) && cnt); + + if (!cnt) + edid = NULL; + +done: + sii902x_write(sii902x->client, SII902X_SYS_CONTROL, old); + return edid; +} + +static int +sii902x_encoder_get_modes(struct drm_encoder *encoder, + struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct i2c_adapter *adap = to_i2c_adapter(sii902x->client->dev.parent); + struct edid *edid; + struct drm_display_mode *mode; + int ret; + + edid = sii902x_drm_get_edid(connector, adap); + if (edid) { + drm_mode_connector_update_edid_property(connector, edid); + ret = drm_add_edid_modes(connector, edid); + kfree(edid); + } else { + dev_dbg(dev->dev, "failed to get edid\n"); + } + + list_for_each_entry(mode, &connector->probed_modes, head) { + if (mode->hdisplay == 1024 || mode->vdisplay == 768) + mode->type |= DRM_MODE_TYPE_PREFERRED; + else + mode->type &= ~DRM_MODE_TYPE_PREFERRED; + } + + return ret; +} + +static struct drm_encoder_slave_funcs sii902x_encoder_funcs = { + .dpms = sii902x_encoder_dpms, + .mode_valid = sii902x_encoder_mode_valid, + .mode_set = sii902x_encoder_mode_set, + .get_modes = sii902x_encoder_get_modes, +}; +static int +sii902x_encoder_init(struct i2c_client *client, + struct drm_device *dev, + struct drm_encoder_slave *encoder) +{ + + encoder->slave_funcs = &sii902x_encoder_funcs; + + return 0; +} +static const struct i2c_device_id sii902x_id[] = { + { "sii902x", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, sii902x_id); + +static const struct of_device_id sii902x_dt_ids[] = { + { .compatible = "sil,sii9022a", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, sii902x_dt_ids); + +static struct drm_i2c_encoder_driver sii902x_driver = { + .i2c_driver = { + .probe = sii902x_probe, + .remove = sii902x_remove, + .driver = { + .name = "sii902x", + .owner = THIS_MODULE, + .of_match_table = sii902x_dt_ids, + }, + .id_table = sii902x_id, + }, + .encoder_init = sii902x_encoder_init, +}; + +/* Module initialization */ + +static int __init sii902x_init(void) +{ + return drm_i2c_encoder_register(THIS_MODULE, &sii902x_driver); +} + +static void __exit sii902x_exit(void) +{ + drm_i2c_encoder_unregister(&sii902x_driver); +} + + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("SII902x DVI/HDMI driver"); +MODULE_LICENSE("GPL"); + + +module_init(sii902x_init); +module_exit(sii902x_exit);
DCU is the shortcut of 'display controller unit', some HDMI transmitter attached to DCU, such as sii9022a, and this driver add the relavent functions to DRM framewrok.
Signed-off-by: Meng Yi meng.yi@nxp.com --- .../bindings/display/bridge/sil,sii9022a.txt | 40 +++ drivers/gpu/drm/fsl-dcu/Makefile | 1 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h | 1 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c | 271 +++++++++++++++++++++ drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c | 10 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h | 11 + 6 files changed, 334 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt create mode 100644 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
diff --git a/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt b/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt new file mode 100644 index 0000000..32a726a --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt @@ -0,0 +1,40 @@ +Device-Tree bindings for the SiI902x hdmi transmitter. +----------------------------------------- + +The SiI9022A is an ultra low-power HDMI transmitter. It supports resolutions from +standard definition 480i/p and 576i/p all the way to high-definition 720p, 1080i, +and 1080p, the highest resolution supported by HDTVs today. It also supports all +PC resolutions up to UXGA for netbooks + +Required properties: +- compatible: Should be "sil,sii9022a". +- reg: The I2C address of the device. +- interrupts: Interrupt number to the cpu. + +Required nodes: + +The sii9022 has one video ports. Its connection is modelled using the OF +graph bindings specified in Documentation/devicetree/bindings/graph.txt. + +- Video port 0 for the HDMI output + +Example: +------- + + sii9022: hdmi@39 { + compatible = "sil,sii9022a"; + reg = <0x39>; + interrupts = <GIC_SPI 167 IRQ_TYPE_EDGE_RISING>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <1>; + sii9022_out: endpoint { + remote-endpoint = <&hdmi_con>; + }; + }; + }; + }; diff --git a/drivers/gpu/drm/fsl-dcu/Makefile b/drivers/gpu/drm/fsl-dcu/Makefile index 6ea1523..98cacc2 100644 --- a/drivers/gpu/drm/fsl-dcu/Makefile +++ b/drivers/gpu/drm/fsl-dcu/Makefile @@ -1,6 +1,7 @@ fsl-dcu-drm-y := fsl_dcu_drm_drv.o \ fsl_dcu_drm_kms.o \ fsl_dcu_drm_rgb.o \ + fsl_dcu_drm_hdmi.o \ fsl_dcu_drm_plane.o \ fsl_dcu_drm_crtc.o \ fsl_dcu_drm_fbdev.o diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h index 579b9e4..3c85072 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h @@ -187,6 +187,7 @@ struct fsl_dcu_drm_device { struct drm_fbdev_cma *fbdev; struct drm_crtc crtc; struct drm_encoder encoder; + struct drm_encoder_slave *slave; struct fsl_dcu_drm_connector connector; const struct fsl_dcu_soc_data *soc; }; diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c new file mode 100644 index 0000000..0b06060 --- /dev/null +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c @@ -0,0 +1,271 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * Freescale DCU drm device driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/fb.h> +#include <linux/fsl_devices.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/backlight.h> +#include <video/videomode.h> +#include <video/of_display_timing.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_encoder_slave.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> + +#include "fsl_dcu_drm_drv.h" +#include "fsl_dcu_drm_output.h" + +#define to_drm_encoder_slave(e) \ + container_of(e, struct drm_encoder_slave, base) +#define to_slave_funcs(e) (to_drm_encoder_slave(e)->slave_funcs) +static void fsl_dcu_drm_hdmienc_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder); + + if (sfuncs->mode_set) + sfuncs->mode_set(encoder, mode, adjusted_mode); + +} + +static int +fsl_dcu_drm_hdmienc_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + return 0; +} + +static void fsl_dcu_drm_hdmienc_disable(struct drm_encoder *encoder) +{ + const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder); + + if (sfuncs->dpms) + sfuncs->dpms(encoder, DRM_MODE_DPMS_OFF); +} + +static void fsl_dcu_drm_hdmienc_enable(struct drm_encoder *encoder) +{ + const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder); + + if (sfuncs->dpms) + sfuncs->dpms(encoder, DRM_MODE_DPMS_ON); +} + +static const struct drm_encoder_helper_funcs encoder_helper_funcs = { + .atomic_check = fsl_dcu_drm_hdmienc_atomic_check, + .disable = fsl_dcu_drm_hdmienc_disable, + .enable = fsl_dcu_drm_hdmienc_enable, + .mode_set = fsl_dcu_drm_hdmienc_mode_set, +}; + +static void fsl_dcu_drm_hdmienc_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); +} + +static const struct drm_encoder_funcs encoder_funcs = { + .destroy = fsl_dcu_drm_hdmienc_destroy, +}; +int fsl_dcu_drm_hdmienc_create(struct fsl_dcu_drm_device *fsl_dev, + struct drm_crtc *crtc) +{ + struct drm_i2c_encoder_driver *driver; + struct drm_encoder_slave *enc_slave; + struct drm_encoder *encoder; + struct i2c_client *i2c_slave; + int ret; + + + struct device_node *np = of_find_compatible_node(NULL, + NULL, "sil,sii9022a"); + if (np == NULL) + return -1; + + /* Locate the slave I2C device and driver. */ + i2c_slave = of_find_i2c_device_by_node(np); + if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) + return -EPROBE_DEFER; + + enc_slave = devm_kzalloc(fsl_dev->dev, sizeof(*enc_slave), GFP_KERNEL); + if (!enc_slave) + return -1; + + /* Initialize the slave encoder. */ + driver = to_drm_i2c_encoder_driver( + to_i2c_driver(i2c_slave->dev.driver)); + ret = driver->encoder_init(i2c_slave, fsl_dev->drm, enc_slave); + if (ret < 0) + return -1; + + fsl_dev->slave = enc_slave; + encoder = &enc_slave->base; + + + encoder->possible_crtcs = 1; + ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs, + DRM_MODE_ENCODER_TMDS, NULL); + if (ret < 0) + return ret; + + drm_encoder_helper_add(encoder, &encoder_helper_funcs); + encoder->crtc = crtc; + + return 0; +} + +#define to_fsl_dcu_drm_hdmicon(connector) \ + container_of(connector, struct fsl_dcu_drm_hdmicon, connector) + +static struct drm_encoder *fsl_dcu_drm_hdmi_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_TMDS) + return encoder; + } + + return NULL; +} + +static void fsl_dcu_drm_hdmicon_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static enum drm_connector_status +fsl_dcu_drm_hdmicon_detect(struct drm_connector *connector, bool force) +{ + struct fsl_dcu_drm_hdmicon *hdmicon = to_fsl_dcu_drm_hdmicon(connector); + + if (hdmicon->status == connector_status_disconnected) + return connector_status_disconnected; + else + return connector_status_connected; +} + +static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = { + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, + .destroy = fsl_dcu_drm_hdmicon_destroy, + .detect = fsl_dcu_drm_hdmicon_detect, + .dpms = drm_atomic_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .reset = drm_atomic_helper_connector_reset, +}; + +static struct drm_encoder * +fsl_dcu_drm_hdmicon_best_encoder(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + + return fsl_dcu_drm_hdmi_find_encoder(dev); +} + + +static int fsl_dcu_drm_hdmicon_get_modes(struct drm_connector *connector) +{ + struct fsl_dcu_drm_hdmicon *con = to_fsl_dcu_drm_hdmicon(connector); + const struct drm_encoder_slave_funcs *sfuncs = con->slave->slave_funcs; + + if (sfuncs->get_modes == NULL) + return 0; + + return sfuncs->get_modes(NULL, connector); +} + +static int fsl_dcu_drm_hdmicon_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + if (mode->hdisplay > 1024) + return MODE_VIRTUAL_X; + else if (mode->vdisplay > 768) + return MODE_VIRTUAL_Y; + + return MODE_OK; +} + +static const struct drm_connector_helper_funcs connector_helper_funcs = { + .best_encoder = fsl_dcu_drm_hdmicon_best_encoder, + .get_modes = fsl_dcu_drm_hdmicon_get_modes, + .mode_valid = fsl_dcu_drm_hdmicon_mode_valid, +}; + +int fsl_dcu_drm_hdmicon_create(struct fsl_dcu_drm_device *fsl_dev) +{ + struct drm_device *dev = fsl_dev->drm; + struct fsl_dcu_drm_hdmicon *hdmicon; + struct drm_connector *connector; + struct drm_encoder *encoder; + int ret; + + hdmicon = devm_kzalloc(fsl_dev->dev, + sizeof(struct fsl_dcu_drm_hdmicon), GFP_KERNEL); + if (!hdmicon) + return -ENOMEM; + + hdmicon->slave = fsl_dev->slave; + connector = &hdmicon->connector; + + connector->display_info.width_mm = 0; + connector->display_info.height_mm = 0; + connector->polled = DRM_CONNECTOR_POLL_HPD; + + ret = drm_connector_init(fsl_dev->drm, connector, + &fsl_dcu_drm_connector_funcs, + DRM_MODE_CONNECTOR_HDMIA); + if (ret < 0) + return ret; + + connector->dpms = DRM_MODE_DPMS_OFF; + drm_connector_helper_add(connector, &connector_helper_funcs); + ret = drm_connector_register(connector); + if (ret < 0) + goto err_cleanup; + + encoder = fsl_dcu_drm_hdmi_find_encoder(dev); + if (!encoder) + goto err_cleanup; + ret = drm_mode_connector_attach_encoder(connector, encoder); + if (ret < 0) + goto err_sysfs; + + connector->encoder = encoder; + + drm_object_property_set_value + (&connector->base, fsl_dev->drm->mode_config.dpms_property, + DRM_MODE_DPMS_OFF); + + return 0; + +err_sysfs: + drm_connector_unregister(connector); +err_cleanup: + drm_connector_cleanup(connector); + return ret; +} + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("SII902x DVI/HDMI driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c index 0ef5959..f42ef5f 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c @@ -17,10 +17,18 @@ #include "fsl_dcu_drm_crtc.h" #include "fsl_dcu_drm_drv.h"
+static void fsl_dcu_drm_output_poll_changed(struct drm_device *dev) +{ + struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; + + drm_fbdev_cma_hotplug_event(fsl_dev->fbdev); +} + static const struct drm_mode_config_funcs fsl_dcu_drm_mode_config_funcs = { .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, .fb_create = drm_fb_cma_create, + .output_poll_changed = fsl_dcu_drm_output_poll_changed, };
int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev) @@ -36,7 +44,9 @@ int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev) drm_kms_helper_poll_init(fsl_dev->drm); fsl_dcu_drm_crtc_create(fsl_dev); fsl_dcu_drm_encoder_create(fsl_dev, &fsl_dev->crtc); + fsl_dcu_drm_hdmienc_create(fsl_dev, &fsl_dev->crtc); fsl_dcu_drm_connector_create(fsl_dev, &fsl_dev->encoder); + fsl_dcu_drm_hdmicon_create(fsl_dev); drm_mode_config_reset(fsl_dev->drm);
return 0; diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h index 7093109..fa0d7ed 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h @@ -18,6 +18,13 @@ struct fsl_dcu_drm_connector { struct drm_panel *panel; };
+struct fsl_dcu_drm_hdmicon { + struct drm_connector connector; + struct drm_encoder_slave *slave; + struct i2c_client *client; + enum drm_connector_status status; +}; + static inline struct fsl_dcu_drm_connector * to_fsl_dcu_connector(struct drm_connector *con) { @@ -29,5 +36,9 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev, struct drm_encoder *encoder); int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev, struct drm_crtc *crtc); +int fsl_dcu_drm_hdmicon_create(struct fsl_dcu_drm_device *fsl_dev); +int fsl_dcu_drm_hdmienc_create(struct fsl_dcu_drm_device *fsl_dev, + struct drm_crtc *crtc); +
#endif /* __FSL_DCU_DRM_CONNECTOR_H__ */
On Tue, Jan 26, 2016 at 12:00:33PM +0800, Meng Yi wrote:
DCU is the shortcut of 'display controller unit', some HDMI transmitter attached to DCU, such as sii9022a, and this driver add the relavent functions to DRM framewrok.
Signed-off-by: Meng Yi meng.yi@nxp.com
.../bindings/display/bridge/sil,sii9022a.txt | 40 +++ drivers/gpu/drm/fsl-dcu/Makefile | 1 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h | 1 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c | 271 +++++++++++++++++++++ drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c | 10 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h | 11 + 6 files changed, 334 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt create mode 100644 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
diff --git a/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt b/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt new file mode 100644 index 0000000..32a726a --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt @@ -0,0 +1,40 @@ +Device-Tree bindings for the SiI902x hdmi transmitter. +-----------------------------------------
+The SiI9022A is an ultra low-power HDMI transmitter. It supports resolutions from +standard definition 480i/p and 576i/p all the way to high-definition 720p, 1080i, +and 1080p, the highest resolution supported by HDTVs today. It also supports all
Well, we're up to 4K now...
+PC resolutions up to UXGA for netbooks
+Required properties: +- compatible: Should be "sil,sii9022a". +- reg: The I2C address of the device. +- interrupts: Interrupt number to the cpu.
+Required nodes:
+The sii9022 has one video ports. Its connection is modelled using the OF +graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+- Video port 0 for the HDMI output
+Example: +-------
- sii9022: hdmi@39 {
compatible = "sil,sii9022a";reg = <0x39>;interrupts = <GIC_SPI 167 IRQ_TYPE_EDGE_RISING>;ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <1>;
Your unit address (0) and reg don't match.
sii9022_out: endpoint {remote-endpoint = <&hdmi_con>;};
This needs to have a port for the input for the connection to your display controller.
};};- };
Hi Rob Thanks for your reply. I will correct those soon, and then send v2 out. BR Meng Yi
On Friday, January 29, 2016 10:52 AM, Rob Herring[robh@kernel.org] wrote:
+The SiI9022A is an ultra low-power HDMI transmitter. It supports +resolutions from standard definition 480i/p and 576i/p all the way to +high-definition 720p, 1080i, and 1080p, the highest resolution +supported by HDTVs today. It also supports all
Well, we're up to 4K now...
ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <1>;Your unit address (0) and reg don't match.
sii9022_out: endpoint {remote-endpoint = <&hdmi_con>;};This needs to have a port for the input for the connection to your display controller.
};};- };
Hi Meng Yi,
I plan to review the patchset too, but did not come around yet.
The forth patch conflicts with my changes in the DRM DCU driver. Since it will likely go through my tree, please base v2 ontop of my DCU branch: http://git.agner.ch/gitweb/?p=linux-drm-fsl-dcu.git;a=summary
-- Stefan
On 2016-02-02 01:53, Meng Yi wrote:
Hi Rob Thanks for your reply. I will correct those soon, and then send v2 out. BR Meng Yi
On Friday, January 29, 2016 10:52 AM, Rob Herring[robh@kernel.org] wrote:
+The SiI9022A is an ultra low-power HDMI transmitter. It supports +resolutions from standard definition 480i/p and 576i/p all the way to +high-definition 720p, 1080i, and 1080p, the highest resolution +supported by HDTVs today. It also supports all
Well, we're up to 4K now...
ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <1>;Your unit address (0) and reg don't match.
sii9022_out: endpoint {remote-endpoint = <&hdmi_con>;};This needs to have a port for the input for the connection to your display controller.
};};- };
Hi Stefan, I will take PTO during Chinese Spring Festival, and I will rebase my patches according to your tree and send out after 2/16/2016 ^_^ BR Meng
On Wednesday, February 03, 2016 5:56 AM, Stefan Agner [stefan@agner.ch] wrote:
Hi Meng Yi,
I plan to review the patchset too, but did not come around yet.
The forth patch conflicts with my changes in the DRM DCU driver. Since it will likely go through my tree, please base v2 ontop of my DCU branch: http://git.agner.ch/gitweb/?p=linux-drm-fsl-dcu.git;a=summary
-- Stefan
On 2016-02-02 01:53, Meng Yi wrote:
Hi Rob Thanks for your reply. I will correct those soon, and then send v2 out. BR Meng Yi
On Friday, January 29, 2016 10:52 AM, Rob Herring[robh@kernel.org] wrote:
+The SiI9022A is an ultra low-power HDMI transmitter. It supports +resolutions from standard definition 480i/p and 576i/p all the way +to high-definition 720p, 1080i, and 1080p, the highest resolution +supported by HDTVs today. It also supports all
Well, we're up to 4K now...
ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <1>;Your unit address (0) and reg don't match.
sii9022_out: endpoint {remote-endpoint = <&hdmi_con>;};This needs to have a port for the input for the connection to your display controller.
};};- };
Hi Meng Yi,
As I wrote earlier (http://www.spinics.net/lists/dri-devel/msg95703.html), my fixes patchset contains a similar patch which also explicitly disable the VBLANK interrupt. I think it is the better solution... See: https://lkml.org/lkml/2015/11/18/951
I will soon prepare a git tree and plan to submit that for 4.6, currently I plan to include - Your "Fix no fb check bug" patch - My "fixes and enhancements" patchset - My "fix register initialization" and "use flat regmap cache" patch
Let me know if you have any objections.
-- Stefan
On 2016-01-25 20:00, Meng Yi wrote:
From: Jianwei Wang jianwei.wang.chn@gmail.com
Switch update interrupt mask bit with regmap_update_bits, and clear interrupt status by writing 1 to relevant bit before setting mask in fsl_dcu_drm_irq_init function.
Signed-off-by: JianWei Wang jianwei.wang.chn@gmail.com Signed-off-by: Meng Yi meng.yi@nxp.com
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 26 +++++++------------------- 1 file changed, 7 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c index fca97d3..cbef47c 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -38,21 +38,17 @@ static const struct regmap_config fsl_dcu_regmap_config = { static int fsl_dcu_drm_irq_init(struct drm_device *dev) { struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value; int ret;
ret = drm_irq_install(dev, fsl_dev->irq); if (ret < 0) dev_err(dev->dev, "failed to install IRQ handler\n");
ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
- ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff); if (ret) dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
- ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
- if (ret)
dev_err(dev->dev, "read DCU_INT_MASK failed\n");- value &= DCU_INT_MASK_VBLANK;
- ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
- ret = regmap_update_bits(fsl_dev->regmap, DCU_INT_MASK,
DCU_INT_MASK_VBLANK, ~DCU_INT_MASK_VBLANK);@@ -143,14 +139,10 @@ static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg) static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) { struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value; int ret;
ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
if (ret)
dev_err(dev->dev, "read DCU_INT_MASK failed\n");value &= ~DCU_INT_MASK_VBLANK;
ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
- ret = regmap_update_bits(fsl_dev->regmap, DCU_INT_MASK,
DCU_INT_MASK_VBLANK, ~DCU_INT_MASK_VBLANK);@@ -160,14 +152,10 @@ static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, unsigned int pipe) { struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value; int ret;
ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
if (ret)
dev_err(dev->dev, "read DCU_INT_MASK failed\n");value |= DCU_INT_MASK_VBLANK;
ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
- ret = regmap_update_bits(fsl_dev->regmap, DCU_INT_MASK,
DCU_INT_MASK_VBLANK, DCU_INT_MASK_VBLANK);}
Hi, Stefan I had tested your patch(https://lkml.org/lkml/2015/11/18/951) in ls1021-twr board, I think you can merge this patch to your tree if Jianwei don't have any objections.
On Tuesday, January 26, 2016 1:45 PM, Stefan Agner stefan@agner.ch wrote:
As I wrote earlier (http://www.spinics.net/lists/dri-devel/msg95703.html), my fixes patchset contains a similar patch which also explicitly disable the VBLANK interrupt. I think it is the better solution... See: https://lkml.org/lkml/2015/11/18/951
I will soon prepare a git tree and plan to submit that for 4.6, currently I plan to include
- Your "Fix no fb check bug" patch
- My "fixes and enhancements" patchset
- My "fix register initialization" and "use flat regmap cache" patch
Let me know if you have any objections.
-- Stefan
dri-devel@lists.freedesktop.org
-
Meng Yi -
Rob Herring -
Stefan Agner