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    Subject[PATCH 20/23] drm: omapdrm: panel-dsi-cm: add offset support
    Date
    The Nokia N950 contains a panel, that is partially
    covered, so that not the whole display is visible.
    Thus the image must be displayed with an offset.

    Signed-off-by: Sebastian Reichel <sre@kernel.org>
    ---
    drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 21 ++++++++++++++++-----
    1 file changed, 16 insertions(+), 5 deletions(-)

    diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
    index 4c1e76da68cd..c60bc3013ff4 100644
    --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
    +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
    @@ -45,6 +45,8 @@ struct panel_drv_data {
    struct omap_dss_device *in;

    struct omap_video_timings timings;
    + int offset_x;
    + int offset_y;

    struct platform_device *pdev;

    @@ -203,12 +205,17 @@ static int dsicm_set_update_window(struct panel_drv_data *ddata,
    {
    struct omap_dss_device *in = ddata->in;
    int r;
    - u16 x1 = x;
    - u16 x2 = x + w - 1;
    - u16 y1 = y;
    - u16 y2 = y + h - 1;
    -
    u8 buf[5];
    + u16 x1, x2, y1, y2;
    +
    + x += ddata->offset_x;
    + y += ddata->offset_y;
    +
    + x1 = x;
    + x2 = x + w - 1;
    + y1 = y;
    + y2 = y + h - 1;
    +
    buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
    buf[1] = (x1 >> 8) & 0xff;
    buf[2] = (x1 >> 0) & 0xff;
    @@ -1244,6 +1251,8 @@ static int dsicm_probe_of(struct platform_device *pdev)

    of_property_read_u32(node, "resolution-x", (u32*) &ddata->timings.x_res);
    of_property_read_u32(node, "resolution-y", (u32*) &ddata->timings.y_res);
    + of_property_read_u32(node, "offset-x", &ddata->offset_x);
    + of_property_read_u32(node, "offset-y", &ddata->offset_y);

    ddata->timings.pixelclock = ddata->timings.x_res * ddata->timings.y_res * 60;

    @@ -1273,6 +1282,8 @@ static int dsicm_probe(struct platform_device *pdev)
    ddata->timings.x_res = 864;
    ddata->timings.y_res = 480;
    ddata->timings.pixelclock = 864 * 480 * 60;
    + ddata->offset_x = 0;
    + ddata->offset_y = 0;

    if (dev_get_platdata(dev)) {
    r = dsicm_probe_pdata(pdev);
    --
    2.7.0
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