OMAPDSS: DSI: Fix HSYNC, VSYNC and DE polarities between DISPC and DSI

For DSI operation in videomode, DISPC logic levels for the signals HSYNC, VSYNC
and DE need to be specified to DSI via the fields VP_HSYNC_POL, VP_VSYNC_POL and
VP_DE_POL in DSI_CTRL registers.

This information is completely internal to DSS as logic levels for the above
signals hold no meaning on the DSI bus. Hence a DSI panel driver should be
totally oblivious of these fields.

Fix the logic levels/polarities in the DISPC and DSI registers to a default
value. This is done by overriding these fields in omap_video_timings struct
filled by the panel driver for DISPC, and use the equivalent default values
when programming DSI_CTRL registers. Also, remove the redundant polarity related
fields in omap_dss_dsi_videomode_data.

Signed-off-by: Archit Taneja <archit@ti.com>

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 06b5780..e0d43b2 100644 (file)
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -3631,17 +3631,14 @@ static void dsi_config_vp_num_line_buffers(struct omap_dss_device *dssdev)
 static void dsi_config_vp_sync_events(struct omap_dss_device *dssdev)
 {
        struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
-       int de_pol = dssdev->panel.dsi_vm_data.vp_de_pol;
-       int hsync_pol = dssdev->panel.dsi_vm_data.vp_hsync_pol;
-       int vsync_pol = dssdev->panel.dsi_vm_data.vp_vsync_pol;
        bool vsync_end = dssdev->panel.dsi_vm_data.vp_vsync_end;
        bool hsync_end = dssdev->panel.dsi_vm_data.vp_hsync_end;
        u32 r;
 
        r = dsi_read_reg(dsidev, DSI_CTRL);
-       r = FLD_MOD(r, de_pol, 9, 9);           /* VP_DE_POL */
-       r = FLD_MOD(r, hsync_pol, 10, 10);      /* VP_HSYNC_POL */
-       r = FLD_MOD(r, vsync_pol, 11, 11);      /* VP_VSYNC_POL */
+       r = FLD_MOD(r, 1, 9, 9);                /* VP_DE_POL */
+       r = FLD_MOD(r, 1, 10, 10);              /* VP_HSYNC_POL */
+       r = FLD_MOD(r, 1, 11, 11);              /* VP_VSYNC_POL */
        r = FLD_MOD(r, 1, 15, 15);              /* VP_VSYNC_START */
        r = FLD_MOD(r, vsync_end, 16, 16);      /* VP_VSYNC_END */
        r = FLD_MOD(r, 1, 17, 17);              /* VP_HSYNC_START */
@@ -4343,22 +4340,22 @@ EXPORT_SYMBOL(omap_dsi_update);
 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
 {
        int r;
+       struct omap_video_timings timings;
 
        if (dssdev->panel.dsi_mode == OMAP_DSS_DSI_CMD_MODE) {
                u16 dw, dh;
                u32 irq;
-               struct omap_video_timings timings = {
-                       .hsw            = 1,
-                       .hfp            = 1,
-                       .hbp            = 1,
-                       .vsw            = 1,
-                       .vfp            = 0,
-                       .vbp            = 0,
-               };
 
                dssdev->driver->get_resolution(dssdev, &dw, &dh);
+
                timings.x_res = dw;
                timings.y_res = dh;
+               timings.hsw = 1;
+               timings.hfp = 1;
+               timings.hbp = 1;
+               timings.vsw = 1;
+               timings.vfp = 0;
+               timings.vbp = 0;
 
                irq = dispc_mgr_get_framedone_irq(dssdev->manager->id);
 
@@ -4371,15 +4368,26 @@ static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
 
                dispc_mgr_enable_stallmode(dssdev->manager->id, true);
                dispc_mgr_enable_fifohandcheck(dssdev->manager->id, 1);
-
-               dss_mgr_set_timings(dssdev->manager, &timings);
        } else {
+               timings = dssdev->panel.timings;
+
                dispc_mgr_enable_stallmode(dssdev->manager->id, false);
                dispc_mgr_enable_fifohandcheck(dssdev->manager->id, 0);
-
-               dss_mgr_set_timings(dssdev->manager, &dssdev->panel.timings);
        }
 
+       /*
+        * override interlace, logic level and edge related parameters in
+        * omap_video_timings with default values
+        */
+       timings.interlace = false;
+       timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
+       timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
+       timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
+       timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
+       timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+
+       dss_mgr_set_timings(dssdev->manager, &timings);
+
        dispc_mgr_set_lcd_type_tft(dssdev->manager->id);
 
        dispc_mgr_set_tft_data_lines(dssdev->manager->id,

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index d8ab944..a6267a2 100644 (file)
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -261,9 +261,6 @@ struct omap_dss_dsi_videomode_data {
        int hfp_blanking_mode;
 
        /* Video port sync events */
-       int vp_de_pol;
-       int vp_hsync_pol;
-       int vp_vsync_pol;
        bool vp_vsync_end;
        bool vp_hsync_end;