[PATCH 1/7] drm/exynos: move hdmiphy related code to hdmiphy driver
Sean Paul
seanpaul at chromium.org
Tue Sep 3 07:45:29 PDT 2013
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
> 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).
> + 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?
> }
>
> 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).
> +{
> + 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.
> + 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.
> + 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?
> 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 ()
>
> -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?
> +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?
> + 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.
> + 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.
>
> - 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.
>
> + 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.
> + 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.
> + 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?
> + }
> + 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
> +
> +#endif /* SAMSUNG_REGS_HDMIPHY_H */
> --
> 1.7.10.4
>
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