[PATCH 1/7] drm/exynos: move hdmiphy related code to hdmiphy driver
Rahul Sharma
r.sh.open at gmail.com
Tue Sep 3 22:47:54 PDT 2013
Thanks Sean,
On 3 September 2013 20:15, Sean Paul <seanpaul at chromium.org> wrote:
> A few comments.
>
> On Fri, Aug 30, 2013 at 2:59 AM, Rahul Sharma <rahul.sharma at samsung.com> wrote:
>> Exynos hdmiphy operations and configs are kept inside
>> the hdmi driver. Hdmiphy related code is tightly coupled
>> with hdmi IP driver.
>>
>> This patche moves hdmiphy related code to hdmiphy driver.
>
> s/patche/patch
>
ok.
>> It will help in cleanly supporting the hdmiphy variations
>> in further SoCs.
>>
>> Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
>> ---
>> .../devicetree/bindings/video/exynos_hdmi.txt | 2 +
>> drivers/gpu/drm/exynos/exynos_drm_hdmi.h | 11 +
>> drivers/gpu/drm/exynos/exynos_hdmi.c | 343 +++------------
>> drivers/gpu/drm/exynos/exynos_hdmiphy.c | 438 +++++++++++++++++++-
>> drivers/gpu/drm/exynos/regs-hdmiphy.h | 35 ++
>> 5 files changed, 533 insertions(+), 296 deletions(-)
>> create mode 100644 drivers/gpu/drm/exynos/regs-hdmiphy.h
>>
>> diff --git a/Documentation/devicetree/bindings/video/exynos_hdmi.txt b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
>> index 50decf8..240eca5 100644
>> --- a/Documentation/devicetree/bindings/video/exynos_hdmi.txt
>> +++ b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
>> @@ -25,6 +25,7 @@ Required properties:
>> sclk_pixel.
>> - clock-names: aliases as per driver requirements for above clock IDs:
>> "hdmi", "sclk_hdmi", "sclk_pixel", "sclk_hdmiphy" and "mout_hdmi".
>> +- phy: it points to hdmiphy dt node.
>> Example:
>>
>> hdmi {
>> @@ -32,4 +33,5 @@ Example:
>> reg = <0x14530000 0x100000>;
>> interrupts = <0 95 0>;
>> hpd-gpio = <&gpx3 7 1>;
>> + phy = <&hdmiphy>;
>> };
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_hdmi.h b/drivers/gpu/drm/exynos/exynos_drm_hdmi.h
>> index 724cab1..1c839f8 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_hdmi.h
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_hdmi.h
>> @@ -64,4 +64,15 @@ void exynos_hdmi_drv_attach(struct exynos_drm_hdmi_context *ctx);
>> void exynos_mixer_drv_attach(struct exynos_drm_hdmi_context *ctx);
>> void exynos_hdmi_ops_register(struct exynos_hdmi_ops *ops);
>> void exynos_mixer_ops_register(struct exynos_mixer_ops *ops);
>> +
>> +int exynos_hdmiphy_driver_register(void);
>> +void exynos_hdmiphy_driver_unregister(void);
>> +
>> +void exynos_hdmiphy_enable(struct device *dev);
>> +void exynos_hdmiphy_disable(struct device *dev);
>> +int exynos_hdmiphy_check_mode(struct device *dev,
>> + struct drm_display_mode *mode);
>> +int exynos_hdmiphy_set_mode(struct device *dev,
>> + struct drm_display_mode *mode);
>> +int exynos_hdmiphy_conf_apply(struct device *dev);
>> #endif
>> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
>> index f67ffca..3af4e4c 100644
>> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
>> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
>> @@ -34,6 +34,8 @@
>> #include <linux/io.h>
>> #include <linux/of.h>
>> #include <linux/of_gpio.h>
>> +#include <linux/of_i2c.h>
>> +#include <linux/of_platform.h>
>>
>> #include <drm/exynos_drm.h>
>>
>> @@ -172,7 +174,6 @@ struct hdmi_v14_conf {
>> };
>>
>> struct hdmi_conf_regs {
>> - int pixel_clock;
>> int cea_video_id;
>> union {
>> struct hdmi_v13_conf v13_conf;
>> @@ -193,9 +194,9 @@ struct hdmi_context {
>> int irq;
>>
>> struct i2c_client *ddc_port;
>> - struct i2c_client *hdmiphy_port;
>> + struct device *hdmiphy_dev;
>>
>> - /* current hdmiphy conf regs */
>> + /* current hdmi ip configuration registers. */
>> struct hdmi_conf_regs mode_conf;
>>
>> struct hdmi_resources res;
>> @@ -205,180 +206,6 @@ struct hdmi_context {
>> enum hdmi_type type;
>> };
>>
>> -struct hdmiphy_config {
>> - int pixel_clock;
>> - u8 conf[32];
>> -};
>> -
>> -/* list of phy config settings */
>> -static const struct hdmiphy_config hdmiphy_v13_configs[] = {
>> - {
>> - .pixel_clock = 27000000,
>> - .conf = {
>> - 0x01, 0x05, 0x00, 0xD8, 0x10, 0x1C, 0x30, 0x40,
>> - 0x6B, 0x10, 0x02, 0x51, 0xDF, 0xF2, 0x54, 0x87,
>> - 0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> - 0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x00,
>> - },
>> - },
>> - {
>> - .pixel_clock = 27027000,
>> - .conf = {
>> - 0x01, 0x05, 0x00, 0xD4, 0x10, 0x9C, 0x09, 0x64,
>> - 0x6B, 0x10, 0x02, 0x51, 0xDF, 0xF2, 0x54, 0x87,
>> - 0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> - 0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x00,
>> - },
>> - },
>> - {
>> - .pixel_clock = 74176000,
>> - .conf = {
>> - 0x01, 0x05, 0x00, 0xD8, 0x10, 0x9C, 0xef, 0x5B,
>> - 0x6D, 0x10, 0x01, 0x51, 0xef, 0xF3, 0x54, 0xb9,
>> - 0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> - 0x22, 0x40, 0xa5, 0x26, 0x01, 0x00, 0x00, 0x00,
>> - },
>> - },
>> - {
>> - .pixel_clock = 74250000,
>> - .conf = {
>> - 0x01, 0x05, 0x00, 0xd8, 0x10, 0x9c, 0xf8, 0x40,
>> - 0x6a, 0x10, 0x01, 0x51, 0xff, 0xf1, 0x54, 0xba,
>> - 0x84, 0x00, 0x10, 0x38, 0x00, 0x08, 0x10, 0xe0,
>> - 0x22, 0x40, 0xa4, 0x26, 0x01, 0x00, 0x00, 0x00,
>> - },
>> - },
>> - {
>> - .pixel_clock = 148500000,
>> - .conf = {
>> - 0x01, 0x05, 0x00, 0xD8, 0x10, 0x9C, 0xf8, 0x40,
>> - 0x6A, 0x18, 0x00, 0x51, 0xff, 0xF1, 0x54, 0xba,
>> - 0x84, 0x00, 0x10, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> - 0x22, 0x40, 0xa4, 0x26, 0x02, 0x00, 0x00, 0x00,
>> - },
>> - },
>> -};
>> -
>> -static const struct hdmiphy_config hdmiphy_v14_configs[] = {
>> - {
>> - .pixel_clock = 25200000,
>> - .conf = {
>> - 0x01, 0x51, 0x2A, 0x75, 0x40, 0x01, 0x00, 0x08,
>> - 0x82, 0x80, 0xfc, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xf4, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 27000000,
>> - .conf = {
>> - 0x01, 0xd1, 0x22, 0x51, 0x40, 0x08, 0xfc, 0x20,
>> - 0x98, 0xa0, 0xcb, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> - 0x06, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xe4, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 27027000,
>> - .conf = {
>> - 0x01, 0xd1, 0x2d, 0x72, 0x40, 0x64, 0x12, 0x08,
>> - 0x43, 0xa0, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xe3, 0x24, 0x00, 0x00, 0x00, 0x01, 0x00,
>> - },
>> - },
>> - {
>> - .pixel_clock = 36000000,
>> - .conf = {
>> - 0x01, 0x51, 0x2d, 0x55, 0x40, 0x01, 0x00, 0x08,
>> - 0x82, 0x80, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xab, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 40000000,
>> - .conf = {
>> - 0x01, 0x51, 0x32, 0x55, 0x40, 0x01, 0x00, 0x08,
>> - 0x82, 0x80, 0x2c, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0x9a, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 65000000,
>> - .conf = {
>> - 0x01, 0xd1, 0x36, 0x34, 0x40, 0x1e, 0x0a, 0x08,
>> - 0x82, 0xa0, 0x45, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xbd, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 74176000,
>> - .conf = {
>> - 0x01, 0xd1, 0x3e, 0x35, 0x40, 0x5b, 0xde, 0x08,
>> - 0x82, 0xa0, 0x73, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x56, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xa6, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 74250000,
>> - .conf = {
>> - 0x01, 0xd1, 0x1f, 0x10, 0x40, 0x40, 0xf8, 0x08,
>> - 0x81, 0xa0, 0xba, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> - 0x3c, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xa5, 0x24, 0x01, 0x00, 0x00, 0x01, 0x00,
>> - },
>> - },
>> - {
>> - .pixel_clock = 83500000,
>> - .conf = {
>> - 0x01, 0xd1, 0x23, 0x11, 0x40, 0x0c, 0xfb, 0x08,
>> - 0x85, 0xa0, 0xd1, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0x93, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 106500000,
>> - .conf = {
>> - 0x01, 0xd1, 0x2c, 0x12, 0x40, 0x0c, 0x09, 0x08,
>> - 0x84, 0xa0, 0x0a, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0x73, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 108000000,
>> - .conf = {
>> - 0x01, 0x51, 0x2d, 0x15, 0x40, 0x01, 0x00, 0x08,
>> - 0x82, 0x80, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0xc7, 0x25, 0x03, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 146250000,
>> - .conf = {
>> - 0x01, 0xd1, 0x3d, 0x15, 0x40, 0x18, 0xfd, 0x08,
>> - 0x83, 0xa0, 0x6e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> - 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0x50, 0x25, 0x03, 0x00, 0x00, 0x01, 0x80,
>> - },
>> - },
>> - {
>> - .pixel_clock = 148500000,
>> - .conf = {
>> - 0x01, 0xd1, 0x1f, 0x00, 0x40, 0x40, 0xf8, 0x08,
>> - 0x81, 0xa0, 0xba, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> - 0x3c, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> - 0x54, 0x4b, 0x25, 0x03, 0x00, 0x00, 0x01, 0x00,
>> - },
>> - },
>> -};
>> -
>> struct hdmi_infoframe {
>> enum HDMI_PACKET_TYPE type;
>> u8 ver;
>> @@ -769,28 +596,6 @@ static struct edid *hdmi_get_edid(void *ctx, struct drm_connector *connector)
>> return raw_edid;
>> }
>>
>> -static int hdmi_find_phy_conf(struct hdmi_context *hdata, u32 pixel_clock)
>> -{
>> - const struct hdmiphy_config *confs;
>> - int count, i;
>> -
>> - if (hdata->type == HDMI_TYPE13) {
>> - confs = hdmiphy_v13_configs;
>> - count = ARRAY_SIZE(hdmiphy_v13_configs);
>> - } else if (hdata->type == HDMI_TYPE14) {
>> - confs = hdmiphy_v14_configs;
>> - count = ARRAY_SIZE(hdmiphy_v14_configs);
>> - } else
>> - return -EINVAL;
>> -
>> - for (i = 0; i < count; i++)
>> - if (confs[i].pixel_clock == pixel_clock)
>> - return i;
>> -
>> - DRM_DEBUG_KMS("Could not find phy config for %d\n", pixel_clock);
>> - return -EINVAL;
>> -}
>> -
>> static int hdmi_check_mode(void *ctx, struct drm_display_mode *mode)
>> {
>> struct hdmi_context *hdata = ctx;
>> @@ -801,7 +606,7 @@ static int hdmi_check_mode(void *ctx, struct drm_display_mode *mode)
>> (mode->flags & DRM_MODE_FLAG_INTERLACE) ? true :
>> false, mode->clock * 1000);
>>
>> - ret = hdmi_find_phy_conf(hdata, mode->clock * 1000);
>> + ret = exynos_hdmiphy_check_mode(hdata->hdmiphy_dev, mode);
>> if (ret < 0)
>> return ret;
>> return 0;
>> @@ -1302,19 +1107,13 @@ static void hdmi_mode_apply(struct hdmi_context *hdata)
>>
>> static void hdmiphy_conf_reset(struct hdmi_context *hdata)
>> {
>> - u8 buffer[2];
>> u32 reg;
>>
>> clk_disable_unprepare(hdata->res.sclk_hdmi);
>> clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_pixel);
>> clk_prepare_enable(hdata->res.sclk_hdmi);
>>
>> - /* operation mode */
>> - buffer[0] = 0x1f;
>> - buffer[1] = 0x00;
>> -
>> - if (hdata->hdmiphy_port)
>> - i2c_master_send(hdata->hdmiphy_port, buffer, 2);
>> + exynos_hdmiphy_disable(hdata->hdmiphy_dev);
>>
>> if (hdata->type == HDMI_TYPE13)
>> reg = HDMI_V13_PHY_RSTOUT;
>> @@ -1342,66 +1141,12 @@ static void hdmiphy_poweroff(struct hdmi_context *hdata)
>> HDMI_PHY_POWER_OFF_EN);
>> }
>>
>> -static void hdmiphy_conf_apply(struct hdmi_context *hdata)
>> -{
>> - const u8 *hdmiphy_data;
>> - u8 buffer[32];
>> - u8 operation[2];
>> - u8 read_buffer[32] = {0, };
>> - int ret;
>> - int i;
>> -
>> - if (!hdata->hdmiphy_port) {
>> - DRM_ERROR("hdmiphy is not attached\n");
>> - return;
>> - }
>> -
>> - /* pixel clock */
>> - i = hdmi_find_phy_conf(hdata, hdata->mode_conf.pixel_clock);
>> - if (i < 0) {
>> - DRM_ERROR("failed to find hdmiphy conf\n");
>> - return;
>> - }
>> -
>> - if (hdata->type == HDMI_TYPE13)
>> - hdmiphy_data = hdmiphy_v13_configs[i].conf;
>> - else
>> - hdmiphy_data = hdmiphy_v14_configs[i].conf;
>> -
>> - memcpy(buffer, hdmiphy_data, 32);
>> - ret = i2c_master_send(hdata->hdmiphy_port, buffer, 32);
>> - if (ret != 32) {
>> - DRM_ERROR("failed to configure HDMIPHY via I2C\n");
>> - return;
>> - }
>> -
>> - usleep_range(10000, 12000);
>> -
>> - /* operation mode */
>> - operation[0] = 0x1f;
>> - operation[1] = 0x80;
>> -
>> - ret = i2c_master_send(hdata->hdmiphy_port, operation, 2);
>> - if (ret != 2) {
>> - DRM_ERROR("failed to enable hdmiphy\n");
>> - return;
>> - }
>> -
>> - ret = i2c_master_recv(hdata->hdmiphy_port, read_buffer, 32);
>> - if (ret < 0) {
>> - DRM_ERROR("failed to read hdmiphy config\n");
>> - return;
>> - }
>> -
>> - for (i = 0; i < ret; i++)
>> - DRM_DEBUG_KMS("hdmiphy[0x%02x] write[0x%02x] - "
>> - "recv [0x%02x]\n", i, buffer[i], read_buffer[i]);
>> -}
>> -
>> static void hdmi_conf_apply(struct hdmi_context *hdata)
>> {
>> hdmiphy_conf_reset(hdata);
>> - hdmiphy_conf_apply(hdata);
>> + exynos_hdmiphy_conf_apply(hdata->hdmiphy_dev);
>> + usleep_range(10000, 12000);
>
> This delay seems like something that should be in the phy driver,
> instead of the hdmi driver (since it seems conceivable that certain
> phys might not need a delay or might need a longer delay).
>
ok. I will move it there.
>> + exynos_hdmiphy_enable(hdata->hdmiphy_dev);
>>
>> mutex_lock(&hdata->hdmi_mutex);
>> hdmi_conf_reset(hdata);
>> @@ -1434,7 +1179,6 @@ static void hdmi_v13_mode_set(struct hdmi_context *hdata,
>>
>> hdata->mode_conf.cea_video_id =
>> drm_match_cea_mode((struct drm_display_mode *)m);
>> - hdata->mode_conf.pixel_clock = m->clock * 1000;
>>
>> hdmi_set_reg(core->h_blank, 2, m->htotal - m->hdisplay);
>> hdmi_set_reg(core->h_v_line, 3, (m->htotal << 12) | m->vtotal);
>> @@ -1530,7 +1274,6 @@ static void hdmi_v14_mode_set(struct hdmi_context *hdata,
>>
>> hdata->mode_conf.cea_video_id =
>> drm_match_cea_mode((struct drm_display_mode *)m);
>> - hdata->mode_conf.pixel_clock = m->clock * 1000;
>>
>> hdmi_set_reg(core->h_blank, 2, m->htotal - m->hdisplay);
>> hdmi_set_reg(core->v_line, 2, m->vtotal);
>> @@ -1646,6 +1389,8 @@ static void hdmi_mode_set(void *ctx, struct drm_display_mode *mode)
>> hdmi_v13_mode_set(hdata, mode);
>> else
>> hdmi_v14_mode_set(hdata, mode);
>> +
>> + exynos_hdmiphy_set_mode(hdata->hdmiphy_dev, mode);
>
> Why set_mode when everything else is mode_set?
>
I will change it to mode_set.
>> }
>>
>> static void hdmi_get_max_resol(void *ctx, unsigned int *width,
>> @@ -1824,7 +1569,7 @@ fail:
>> return -ENODEV;
>> }
>>
>> -static struct i2c_client *hdmi_ddc, *hdmi_hdmiphy;
>> +static struct i2c_client *hdmi_ddc;
>>
>> void hdmi_attach_ddc_client(struct i2c_client *ddc)
>> {
>> @@ -1832,12 +1577,6 @@ void hdmi_attach_ddc_client(struct i2c_client *ddc)
>> hdmi_ddc = ddc;
>> }
>>
>> -void hdmi_attach_hdmiphy_client(struct i2c_client *hdmiphy)
>> -{
>> - if (hdmiphy)
>> - hdmi_hdmiphy = hdmiphy;
>> -}
>> -
>> static struct s5p_hdmi_platform_data *drm_hdmi_dt_parse_pdata
>> (struct device *dev)
>> {
>> @@ -1862,6 +1601,50 @@ err_data:
>> return NULL;
>> }
>>
>> +static int hdmi_get_phy_device(struct hdmi_context *hdata)
>
> "get" is not the proper verb here, "initialize" would be more
> appropriate (IMO, of course).
>
But we don't initialise the phy here. It is just to get the
hdmiphy dev* through dt.
>> +{
>> + struct device_node *np;
>> + struct i2c_client *client;
>> + struct platform_device *pdev;
>> + int ret;
>> +
>> + /* register hdmiphy driver */
>> + ret = exynos_hdmiphy_driver_register();
>> + if (ret) {
>> + DRM_ERROR("failed to register hdmiphy driver\n");
>
> Printing ret would be useful here.
ok.
>
>> + goto err;
>> + }
>> +
>> + np = of_parse_phandle(hdata->dev->of_node, "phy", 0);
>> + if (!np) {
>> + DRM_ERROR("Could not find 'phy' property\n");
>> + ret = -ENOENT;
>> + goto err;
>> + }
>> +
>> + /* find hdmi phy on i2c bus */
>> + client = of_find_i2c_device_by_node(np);
>> + if (client) {
>> + hdata->hdmiphy_dev = &client->dev;
>> + ret = 0;
>> + goto exit;
>> + }
>> +
>> + /* find hdmi phy on platform bus */
>> + pdev = of_find_device_by_node(np);
>> + if (pdev) {
>> + hdata->hdmiphy_dev = &pdev->dev;
>> + ret = 0;
>> + goto exit;
>> + }
>> +
>> +exit:
>> + /* able to find hdmiphy on platform/i2c bus */
>> +err:
>
> Probably just easier to have one "exit" or "out" label that just returns ret.
ok.
>
>> + of_node_put(np);
>> + return ret;
>> +}
>> +
>> static struct of_device_id hdmi_match_types[] = {
>> {
>> .compatible = "samsung,exynos5-hdmi",
>> @@ -1939,15 +1722,13 @@ static int hdmi_probe(struct platform_device *pdev)
>>
>> hdata->ddc_port = hdmi_ddc;
>>
>> - /* hdmiphy i2c driver */
>> - if (i2c_add_driver(&hdmiphy_driver)) {
>> - DRM_ERROR("failed to register hdmiphy i2c driver\n");
>> + ret = hdmi_get_phy_device(hdata);
>> + if (ret) {
>> + DRM_ERROR("failed to get hdmiphy device\n");
>
> Printing ret would be useful.
>
>
>> ret = -ENOENT;
>
> Why change the return value here?
>
Yea. Correct. I shouldn't. I will change this.
>> goto err_ddc;
>> }
>>
>> - hdata->hdmiphy_port = hdmi_hdmiphy;
>> -
>> hdata->irq = gpio_to_irq(hdata->hpd_gpio);
>> if (hdata->irq < 0) {
>> DRM_ERROR("failed to get GPIO irq\n");
>> @@ -1977,7 +1758,7 @@ static int hdmi_probe(struct platform_device *pdev)
>> return 0;
>>
>> err_hdmiphy:
>> - i2c_del_driver(&hdmiphy_driver);
>> + exynos_hdmiphy_driver_unregister();
>> err_ddc:
>> i2c_del_driver(&ddc_driver);
>> return ret;
>> @@ -1989,8 +1770,8 @@ static int hdmi_remove(struct platform_device *pdev)
>>
>> pm_runtime_disable(dev);
>>
>> - /* hdmiphy i2c driver */
>> - i2c_del_driver(&hdmiphy_driver);
>> + /* hdmiphy driver */
>> + exynos_hdmiphy_driver_unregister();
>> /* DDC i2c driver */
>> i2c_del_driver(&ddc_driver);
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_hdmiphy.c b/drivers/gpu/drm/exynos/exynos_hdmiphy.c
>> index 59abb14..82daa42 100644
>> --- a/drivers/gpu/drm/exynos/exynos_hdmiphy.c
>> +++ b/drivers/gpu/drm/exynos/exynos_hdmiphy.c
>> @@ -15,51 +15,459 @@
>>
>> #include <linux/kernel.h>
>> #include <linux/i2c.h>
>> -#include <linux/of.h>
>> +#include <linux/module.h>
>> +#include <linux/pm_runtime.h>
>> +#include <linux/clk.h>
>>
>> #include "exynos_drm_drv.h"
>> #include "exynos_hdmi.h"
>> +#include "exynos_drm_hdmi.h"
>> +#include "regs-hdmiphy.h"
>>
>> +#define HDMIPHY_REG_COUNT (32)
>
> This probably belongs in regs-hdmiphy.h instead of here. Also remove the ()
>
Ok. I will move it there.
>>
>> -static int hdmiphy_probe(struct i2c_client *client,
>> - const struct i2c_device_id *id)
>> +struct hdmiphy_context {
>> + struct device *dev;
>> + struct hdmiphy_config *current_conf;
>> +
>> + struct hdmiphy_config *confs;
>> + unsigned int nr_confs;
>> +};
>> +
>> +struct hdmiphy_config {
>> + int pixel_clock;
>> + u8 conf[HDMIPHY_REG_COUNT];
>> +};
>> +
>> +struct hdmiphy_drv_data {
>> + struct hdmiphy_config *confs;
>> + unsigned int count;
>> +};
>> +
>> +/* list of all required phy config settings */
>> +static struct hdmiphy_config hdmiphy_4212_configs[] = {
>> + {
>> + .pixel_clock = 25200000,
>> + .conf = {
>> + 0x01, 0x51, 0x2A, 0x75, 0x40, 0x01, 0x00, 0x08,
>> + 0x82, 0x80, 0xfc, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xf4, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 27000000,
>> + .conf = {
>> + 0x01, 0xd1, 0x22, 0x51, 0x40, 0x08, 0xfc, 0x20,
>> + 0x98, 0xa0, 0xcb, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> + 0x06, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xe4, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 27027000,
>> + .conf = {
>> + 0x01, 0xd1, 0x2d, 0x72, 0x40, 0x64, 0x12, 0x08,
>> + 0x43, 0xa0, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xe3, 0x24, 0x00, 0x00, 0x00, 0x01, 0x00,
>> + },
>> + },
>> + {
>> + .pixel_clock = 36000000,
>> + .conf = {
>> + 0x01, 0x51, 0x2d, 0x55, 0x40, 0x01, 0x00, 0x08,
>> + 0x82, 0x80, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xab, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 40000000,
>> + .conf = {
>> + 0x01, 0x51, 0x32, 0x55, 0x40, 0x01, 0x00, 0x08,
>> + 0x82, 0x80, 0x2c, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0x9a, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 65000000,
>> + .conf = {
>> + 0x01, 0xd1, 0x36, 0x34, 0x40, 0x1e, 0x0a, 0x08,
>> + 0x82, 0xa0, 0x45, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xbd, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 74176000,
>> + .conf = {
>> + 0x01, 0xd1, 0x3e, 0x35, 0x40, 0x5b, 0xde, 0x08,
>> + 0x82, 0xa0, 0x73, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x56, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xa6, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 74250000,
>> + .conf = {
>> + 0x01, 0xd1, 0x1f, 0x10, 0x40, 0x40, 0xf8, 0x08,
>> + 0x81, 0xa0, 0xba, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> + 0x3c, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xa5, 0x24, 0x01, 0x00, 0x00, 0x01, 0x00,
>> + },
>> + },
>> + {
>> + .pixel_clock = 83500000,
>> + .conf = {
>> + 0x01, 0xd1, 0x23, 0x11, 0x40, 0x0c, 0xfb, 0x08,
>> + 0x85, 0xa0, 0xd1, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0x93, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 106500000,
>> + .conf = {
>> + 0x01, 0xd1, 0x2c, 0x12, 0x40, 0x0c, 0x09, 0x08,
>> + 0x84, 0xa0, 0x0a, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0x73, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 108000000,
>> + .conf = {
>> + 0x01, 0x51, 0x2d, 0x15, 0x40, 0x01, 0x00, 0x08,
>> + 0x82, 0x80, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0xc7, 0x25, 0x03, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 146250000,
>> + .conf = {
>> + 0x01, 0xd1, 0x3d, 0x15, 0x40, 0x18, 0xfd, 0x08,
>> + 0x83, 0xa0, 0x6e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
>> + 0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0x50, 0x25, 0x03, 0x00, 0x00, 0x01, 0x80,
>> + },
>> + },
>> + {
>> + .pixel_clock = 148500000,
>> + .conf = {
>> + 0x01, 0xd1, 0x1f, 0x00, 0x40, 0x40, 0xf8, 0x08,
>> + 0x81, 0xa0, 0xba, 0xd8, 0x45, 0xa0, 0xac, 0x80,
>> + 0x3c, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
>> + 0x54, 0x4b, 0x25, 0x03, 0x00, 0x00, 0x01, 0x00,
>> + },
>> + },
>> +};
>> +
>> +static struct hdmiphy_config hdmiphy_4210_configs[] = {
>> + {
>> + .pixel_clock = 27000000,
>> + .conf = {
>> + 0x01, 0x05, 0x00, 0xD8, 0x10, 0x1C, 0x30, 0x40,
>> + 0x6B, 0x10, 0x02, 0x51, 0xDF, 0xF2, 0x54, 0x87,
>> + 0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> + 0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x00,
>> + },
>> + },
>> + {
>> + .pixel_clock = 27027000,
>> + .conf = {
>> + 0x01, 0x05, 0x00, 0xD4, 0x10, 0x9C, 0x09, 0x64,
>> + 0x6B, 0x10, 0x02, 0x51, 0xDF, 0xF2, 0x54, 0x87,
>> + 0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> + 0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x00,
>> + },
>> + },
>> + {
>> + .pixel_clock = 74176000,
>> + .conf = {
>> + 0x01, 0x05, 0x00, 0xD8, 0x10, 0x9C, 0xef, 0x5B,
>> + 0x6D, 0x10, 0x01, 0x51, 0xef, 0xF3, 0x54, 0xb9,
>> + 0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> + 0x22, 0x40, 0xa5, 0x26, 0x01, 0x00, 0x00, 0x00,
>> + },
>> + },
>> + {
>> + .pixel_clock = 74250000,
>> + .conf = {
>> + 0x01, 0x05, 0x00, 0xd8, 0x10, 0x9c, 0xf8, 0x40,
>> + 0x6a, 0x10, 0x01, 0x51, 0xff, 0xf1, 0x54, 0xba,
>> + 0x84, 0x00, 0x10, 0x38, 0x00, 0x08, 0x10, 0xe0,
>> + 0x22, 0x40, 0xa4, 0x26, 0x01, 0x00, 0x00, 0x00,
>> + },
>> + },
>> + {
>> + .pixel_clock = 148500000,
>> + .conf = {
>> + 0x01, 0x05, 0x00, 0xD8, 0x10, 0x9C, 0xf8, 0x40,
>> + 0x6A, 0x18, 0x00, 0x51, 0xff, 0xF1, 0x54, 0xba,
>> + 0x84, 0x00, 0x10, 0x38, 0x00, 0x08, 0x10, 0xE0,
>> + 0x22, 0x40, 0xa4, 0x26, 0x02, 0x00, 0x00, 0x00,
>> + },
>> + },
>> +};
>> +
>
> Are you aware of the effort to move these to dt? Since these are
> board-specific values, it seems incorrect to apply them universally.
> Shirish has uploaded a patch to the chromium review site to push these
> into dt (https://chromium-review.googlesource.com/#/c/65581). Maybe
> you can work that into your patch set?
>
I have gone through these patches. I am adding Shirish here for further
discussion on these changes. he can explain better.
>
>> +static struct hdmiphy_config *hdmiphy_find_conf(struct hdmiphy_context *hdata,
>> + const struct drm_display_mode *mode)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < hdata->nr_confs; i++)
>> + if (hdata->confs[i].pixel_clock == (mode->clock * 1000))
>> + return &hdata->confs[i];
>> +
>> + return NULL;
>> +}
>> +
>> +static int hdmiphy_reg_writeb(struct hdmiphy_context *hdata,
>> + u32 reg_offset, u8 value)
>> +{
>> + if (reg_offset >= HDMIPHY_REG_COUNT)
>> + return -EINVAL;
>> +
>> + if (i2c_verify_client(hdata->dev)) {
>
> Is this necessary?
Based on this check, I was deciding that given dev is i2c or
platform device. But now when we agreed to split drivers to
phy and plf driver, I will remove this.
>
>> + u8 buffer[2];
>> + int ret;
>> +
>> + buffer[0] = reg_offset;
>> + buffer[1] = value;
>> +
>> + ret = i2c_master_send(to_i2c_client(hdata->dev),
>> + buffer, 2);
>> + if (ret == 2)
>> + return 0;
>> + return ret;
>> + } else {
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +static int hdmiphy_reg_write_buf(struct hdmiphy_context *hdata,
>> + u32 reg_offset, const u8 *buf, u32 len)
>> +{
>> + if ((reg_offset + len) > HDMIPHY_REG_COUNT)
>> + return -EINVAL;
>> +
>> + if (i2c_verify_client(hdata->dev)) {
>
> Is this necessary?
>
>
>> + int ret;
>> +
>> + ret = i2c_master_send(to_i2c_client(hdata->dev),
>> + buf, len);
>
> Does this actually work? You don't seem to be using reg_offset anywhere.
>
reg_offset is not required here. I should remove this. This
procedure is to write the complete buf starting from 0.
hdmiphy_reg_writeb is supposed to be used for writing
value from some offset.
>> + if (ret == len)
>> + return 0;
>> + return ret;
>> + } else {
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +int exynos_hdmiphy_check_mode(struct device *dev,
>> + struct drm_display_mode *mode)
>> {
>> - hdmi_attach_hdmiphy_client(client);
>> + struct hdmiphy_context *hdata = dev_get_drvdata(dev);
>> + const struct hdmiphy_config *conf;
>> +
>> + DRM_DEBUG_KMS("[%d]\n", __LINE__);
>
> Maybe you can merge this debug message with the one below.
>
ok.
>>
>> - dev_info(&client->adapter->dev, "attached s5p_hdmiphy "
>> - "into i2c adapter successfully\n");
>> + if (!hdata) {
>> + DRM_ERROR("Invalid arg: hdmiphy device pointer.\n");
>> + return -EINVAL;
>> + }
>
> Can this happen? I think the phy driver registration should be
> synchronous with the hdmi driver registration. As such, it shouldn't
> be possible to get a check_mode callback until it's all set up.
>
I will confirm on this.
>>
>> + DRM_DEBUG("xres=%d, yres=%d, refresh=%d, intl=%d clock=%d\n",
>> + mode->hdisplay, mode->vdisplay,
>> + mode->vrefresh, (mode->flags & DRM_MODE_FLAG_INTERLACE)
>> + ? true : false, mode->clock * 1000);
>> +
>> + conf = hdmiphy_find_conf(hdata, mode);
>> + if (!conf) {
>> + DRM_DEBUG("Display Mode is not supported.\n");
>> + return -EINVAL;
>> + }
>> return 0;
>> }
>>
>> -static int hdmiphy_remove(struct i2c_client *client)
>> +int exynos_hdmiphy_set_mode(struct device *dev,
>> + struct drm_display_mode *mode)
>> {
>> - dev_info(&client->adapter->dev, "detached s5p_hdmiphy "
>> - "from i2c adapter successfully\n");
>> + struct hdmiphy_context *hdata = dev_get_drvdata(dev);
>> +
>> + DRM_DEBUG_KMS("[%d]\n", __LINE__);
>> +
>> + hdata->current_conf = hdmiphy_find_conf(hdata, mode);
>> +
>> + if (!hdata) {
>> + DRM_ERROR("Invalid arg: hdmiphy device pointer.\n");
>> + return -EINVAL;
>> + }
>
> I really hope this check isn't necessary, since you've already
> dereferenced it 2 lines up :) See my comment above, I don't think you
> can ever hit this.
>
>>
>> + if (!hdata->current_conf) {
>> + DRM_ERROR("Display Mode is not supported.\n");
>> + return -EINVAL;
>> + }
>> return 0;
>> }
>>
>> -static struct of_device_id hdmiphy_match_types[] = {
>> +void exynos_hdmiphy_enable(struct device *dev)
>> +{
>> + struct hdmiphy_context *hdata = dev_get_drvdata(dev);
>> + int ret;
>> +
>> + DRM_DEBUG_KMS("[%d]\n", __LINE__);
>> +
>> + if (!hdata) {
>> + DRM_ERROR("Invalid arg: hdmiphy device pointer.\n");
>> + return;
>> + }
>
> Same comment as above.
>
>> +
>> + ret = hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
>> + HDMIPHY_MODE_EN);
>> + if (ret < 0) {
>> + DRM_ERROR("failed to disable hdmiphy.\n");
>> + return;
>> + }
>> +}
>> +
>> +void exynos_hdmiphy_disable(struct device *dev)
>> +{
>> + struct hdmiphy_context *hdata = dev_get_drvdata(dev);
>> + int ret;
>> +
>> + DRM_DEBUG_KMS("[%d]\n", __LINE__);
>> +
>> + if (!hdata) {
>> + DRM_ERROR("Invalid arg: hdmiphy device pointer.\n");
>> + return;
>> + }
>> +
>> + ret = hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE, 0);
>> + if (ret < 0) {
>> + DRM_ERROR("failed to enable hdmiphy.\n");
>
> If you're not going to return the error code, at least print it here.
>
ok.
>> + return;
>> + }
>> +}
>> +
>> +int exynos_hdmiphy_conf_apply(struct device *dev)
>> +{
>> + struct hdmiphy_context *hdata = dev_get_drvdata(dev);
>> + const u8 *hdmiphy_data;
>> + int ret;
>> +
>> + DRM_DEBUG_KMS("[%d]\n", __LINE__);
>> +
>> + if (!hdata) {
>> + DRM_ERROR("Invalid arg: hdmiphy device pointer.\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* pixel clock */
>
> I don't understand this comment.
>
I will remove this.
>> + if (hdata->current_conf)
>> + hdmiphy_data = hdata->current_conf->conf;
>> + else
>> + return -EINVAL;
>> +
>> + ret = hdmiphy_reg_write_buf(hdata, 0, hdmiphy_data,
>> + HDMIPHY_REG_COUNT);
>
> I think the only reason this works is b/c you're writing to register offset 0.
>
>> + if (ret) {
>> + DRM_ERROR("failed to configure hdmiphy.\n");
>> + return -EINVAL;
>
> Why don't you return ret?
>
ok.
>> + }
>> + return 0;
>> +}
>> +
>> +static struct hdmiphy_drv_data exynos4212_hdmiphy_drv_data = {
>> + .confs = hdmiphy_4212_configs,
>> + .count = ARRAY_SIZE(hdmiphy_4212_configs)
>> +};
>> +
>> +static struct hdmiphy_drv_data exynos4210_hdmiphy_drv_data = {
>> + .confs = hdmiphy_4210_configs,
>> + .count = ARRAY_SIZE(hdmiphy_4210_configs)
>> +};
>> +
>> +static struct of_device_id hdmiphy_i2c_device_match_types[] = {
>> {
>> .compatible = "samsung,exynos5-hdmiphy",
>> + .data = &exynos4212_hdmiphy_drv_data,
>> }, {
>> .compatible = "samsung,exynos4210-hdmiphy",
>> + .data = &exynos4210_hdmiphy_drv_data,
>> }, {
>> .compatible = "samsung,exynos4212-hdmiphy",
>> + .data = &exynos4212_hdmiphy_drv_data,
>> }, {
>> /* end node */
>> }
>> };
>>
>> -struct i2c_driver hdmiphy_driver = {
>> +static int hdmiphy_i2c_device_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + struct device *dev = &client->dev;
>> + struct hdmiphy_context *hdata;
>> + struct hdmiphy_drv_data *drv;
>> + const struct of_device_id *match;
>> +
>> + DRM_DEBUG_KMS("[%d]\n", __LINE__);
>> +
>> + hdata = devm_kzalloc(dev, sizeof(*hdata), GFP_KERNEL);
>> + if (!hdata) {
>> + DRM_ERROR("failed to allocate hdmiphy context.\n");
>> + return -ENOMEM;
>> + }
>> +
>> + match = of_match_node(of_match_ptr(
>> + hdmiphy_i2c_device_match_types),
>> + dev->of_node);
>> +
>> + if (match == NULL)
>> + return -ENODEV;
>> +
>> + drv = (struct hdmiphy_drv_data *)match->data;
>> +
>> + hdata->dev = dev;
>> + hdata->confs = drv->confs;
>> + hdata->nr_confs = drv->count;
>> +
>> + i2c_set_clientdata(client, hdata);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id hdmiphy_id[] = {
>> + { },
>> +};
>> +
>> +struct i2c_driver hdmiphy_i2c_driver = {
>> .driver = {
>> .name = "exynos-hdmiphy",
>> .owner = THIS_MODULE,
>> - .of_match_table = hdmiphy_match_types,
>> + .of_match_table = of_match_ptr(
>> + hdmiphy_i2c_device_match_types),
>> },
>> - .probe = hdmiphy_probe,
>> - .remove = hdmiphy_remove,
>> + .id_table = hdmiphy_id,
>> + .probe = hdmiphy_i2c_device_probe,
>> .command = NULL,
>> };
>> -EXPORT_SYMBOL(hdmiphy_driver);
>> +
>> +int exynos_hdmiphy_driver_register(void)
>> +{
>> + int ret;
>> +
>> + ret = i2c_add_driver(&hdmiphy_i2c_driver);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +void exynos_hdmiphy_driver_unregister(void)
>> +{
>> + i2c_del_driver(&hdmiphy_i2c_driver);
>> +}
>> diff --git a/drivers/gpu/drm/exynos/regs-hdmiphy.h b/drivers/gpu/drm/exynos/regs-hdmiphy.h
>> new file mode 100644
>> index 0000000..d3f9d87
>> --- /dev/null
>> +++ b/drivers/gpu/drm/exynos/regs-hdmiphy.h
>> @@ -0,0 +1,35 @@
>> +/*
>> + *
>> + * regs-hdmiphy.h
>> + *
>> + * Copyright (c) 2013 Samsung Electronics Co., Ltd.
>> + * http://www.samsung.com/
>> + *
>> + * HDMI-PHY register header file for Samsung HDMI driver
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License version 2 as
>> + * published by the Free Software Foundation.
>> +*/
>> +
>> +#ifndef SAMSUNG_REGS_HDMIPHY_H
>> +#define SAMSUNG_REGS_HDMIPHY_H
>> +
>> +/*
>> + * Register part
>> +*/
>> +#define HDMIPHY_MODE_SET_DONE (0x1f)
>> +
>> +/*
>> + * Bit definition part
>> + */
>> +
>> +/* HDMIPHY_MODE_SET_DONE */
>> +#define HDMIPHY_MODE_EN (1 << 7)
>> +
>> +/* hdmiphy pmu control bits */
>> +#define PMU_HDMI_PHY_CONTROL_MASK (1 << 0)
>> +#define PMU_HDMI_PHY_ENABLE (1)
>> +#define PMU_HDMI_PHY_DISABLE (0)
>
>
> You don't need the () around simple values
>
ok.
We also discussed previously to keep independent i2c and
platform phy drivers in exynos_hdmiphy_i2c.c and
exynos_hdmiphy_platform.c respectively, which will duplicate
the code to some extent.
Second point is to implement exynos_i2c_hdmiphy_get_ops()
and exynos_platform_hdmiphy_get_ops() to get access to all
callbacks. This will limit the exposure of phy callbacks to the
phy controller.
Please share your views on this.
Regards,
Rahul Sharma.
>> +
>> +#endif /* SAMSUNG_REGS_HDMIPHY_H */
>> --
>> 1.7.10.4
>>
More information about the dri-devel
mailing list