drm: sti: prepare sti_tvout to support auxiliary crtc

Change some functions prototype to prepare the introduction of
auxiliary crtc. It will also help to have a DVO encoder.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

1 files changed, 52 insertions, 40 deletions

diff --git a/drivers/gpu/drm/sti/sti_tvout.c b/drivers/gpu/drm/sti/sti_tvout.c
index b8afe490356a..604e574d726e 100644
--- a/drivers/gpu/drm/sti/sti_tvout.c
+++ b/drivers/gpu/drm/sti/sti_tvout.c
@@ -149,14 +149,15 @@ static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
  * Set the clipping mode of a VIP
  *
  * @tvout: tvout structure
+ * @reg: register to set
  * @cr_r:
  * @y_g:
  * @cb_b:
  */
-static void tvout_vip_set_color_order(struct sti_tvout *tvout,
+static void tvout_vip_set_color_order(struct sti_tvout *tvout, int reg,
                                       u32 cr_r, u32 y_g, u32 cb_b)
 {
-        u32 val = tvout_read(tvout, TVO_VIP_HDMI);
+        u32 val = tvout_read(tvout, reg);
 
         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
@@ -165,52 +166,58 @@ static void tvout_vip_set_color_order(struct sti_tvout *tvout,
         val |= y_g << TVO_VIP_REORDER_G_SHIFT;
         val |= cb_b << TVO_VIP_REORDER_B_SHIFT;
 
-        tvout_write(tvout, val, TVO_VIP_HDMI);
+        tvout_write(tvout, val, reg);
 }
 
 /**
  * Set the clipping mode of a VIP
  *
  * @tvout: tvout structure
+ * @reg: register to set
  * @range: clipping range
  */
-static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, u32 range)
+static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, int reg, u32 range)
 {
-        u32 val = tvout_read(tvout, TVO_VIP_HDMI);
+        u32 val = tvout_read(tvout, reg);
 
         val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
         val |= range << TVO_VIP_CLIP_SHIFT;
-        tvout_write(tvout, val, TVO_VIP_HDMI);
+        tvout_write(tvout, val, reg);
 }
 
 /**
  * Set the rounded value of a VIP
  *
  * @tvout: tvout structure
+ * @reg: register to set
  * @rnd: rounded val per component
  */
-static void tvout_vip_set_rnd(struct sti_tvout *tvout, u32 rnd)
+static void tvout_vip_set_rnd(struct sti_tvout *tvout, int reg, u32 rnd)
 {
-        u32 val = tvout_read(tvout, TVO_VIP_HDMI);
+        u32 val = tvout_read(tvout, reg);
 
         val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
         val |= rnd << TVO_VIP_RND_SHIFT;
-        tvout_write(tvout, val, TVO_VIP_HDMI);
+        tvout_write(tvout, val, reg);
 }
 
 /**
  * Select the VIP input
  *
  * @tvout: tvout structure
+ * @reg: register to set
+ * @main_path: main or auxiliary path
+ * @sel_input_logic_inverted: need to invert the logic
  * @sel_input: selected_input (main/aux + conv)
  */
 static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
+                                    int reg,
                                     bool main_path,
                                     bool sel_input_logic_inverted,
                                     enum sti_tvout_video_out_type video_out)
 {
         u32 sel_input;
-        u32 val = tvout_read(tvout, TVO_VIP_HDMI);
+        u32 val = tvout_read(tvout, reg);
 
         if (main_path)
                 sel_input = TVO_VIP_SEL_INPUT_MAIN;
@@ -232,22 +239,24 @@ static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
 
         val &= ~TVO_VIP_SEL_INPUT_MASK;
         val |= sel_input;
-        tvout_write(tvout, val, TVO_VIP_HDMI);
+        tvout_write(tvout, val, reg);
 }
 
 /**
  * Select the input video signed or unsigned
  *
  * @tvout: tvout structure
+ * @reg: register to set
  * @in_vid_signed: used video input format
  */
-static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout, u32 in_vid_fmt)
+static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout,
+                int reg, u32 in_vid_fmt)
 {
-        u32 val = tvout_read(tvout, TVO_VIP_HDMI);
+        u32 val = tvout_read(tvout, reg);
 
         val &= ~TVO_IN_FMT_SIGNED;
         val |= in_vid_fmt;
-        tvout_write(tvout, val, TVO_MAIN_IN_VID_FORMAT);
+        tvout_write(tvout, val, reg);
 }
 
 /**
@@ -261,6 +270,7 @@ static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
 {
         struct device_node *node = tvout->dev->of_node;
         bool sel_input_logic_inverted = false;
+        u32 tvo_in_vid_format;
 
         dev_dbg(tvout->dev, "%s\n", __func__);
 
@@ -268,33 +278,36 @@ static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
                 DRM_DEBUG_DRIVER("main vip for hdmi\n");
                 /* select the input sync for hdmi = VTG set 1 */
                 tvout_write(tvout, TVO_SYNC_MAIN_VTG_SET_1, TVO_HDMI_SYNC_SEL);
+                tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
         } else {
                 DRM_DEBUG_DRIVER("aux vip for hdmi\n");
                 /* select the input sync for hdmi = VTG set 1 */
                 tvout_write(tvout, TVO_SYNC_AUX_VTG_SET_1, TVO_HDMI_SYNC_SEL);
+                tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
         }
 
         /* set color channel order */
-        tvout_vip_set_color_order(tvout,
+        tvout_vip_set_color_order(tvout, TVO_VIP_HDMI,
                                   TVO_VIP_REORDER_CR_R_SEL,
                                   TVO_VIP_REORDER_Y_G_SEL,
                                   TVO_VIP_REORDER_CB_B_SEL);
 
         /* set clipping mode (Limited range RGB/Y) */
-        tvout_vip_set_clip_mode(tvout, TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y);
+        tvout_vip_set_clip_mode(tvout, TVO_VIP_HDMI,
+                        TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y);
 
         /* set round mode (rounded to 8-bit per component) */
-        tvout_vip_set_rnd(tvout, TVO_VIP_RND_8BIT_ROUNDED);
+        tvout_vip_set_rnd(tvout, TVO_VIP_HDMI, TVO_VIP_RND_8BIT_ROUNDED);
 
         if (of_device_is_compatible(node, "st,stih407-tvout")) {
                 /* set input video format */
-                tvout_vip_set_in_vid_fmt(tvout->regs + TVO_MAIN_IN_VID_FORMAT,
-                                         TVO_IN_FMT_SIGNED);
+                tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format,
+                                        TVO_IN_FMT_SIGNED);
                 sel_input_logic_inverted = true;
         }
 
         /* input selection */
-        tvout_vip_set_sel_input(tvout, main_path,
+        tvout_vip_set_sel_input(tvout, TVO_VIP_HDMI, main_path,
                         sel_input_logic_inverted, STI_TVOUT_VIDEO_OUT_RGB);
 }
 
@@ -309,48 +322,47 @@ static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
 {
         struct device_node *node = tvout->dev->of_node;
         bool sel_input_logic_inverted = false;
+        u32 tvo_in_vid_format;
+        int val;
 
         dev_dbg(tvout->dev, "%s\n", __func__);
 
-        if (!main_path) {
-                DRM_ERROR("HD Analog on aux not implemented\n");
-                return;
+        if (main_path) {
+                val = TVO_SYNC_MAIN_VTG_SET_2 << TVO_SYNC_HD_DCS_SHIFT;
+                val |= TVO_SYNC_MAIN_VTG_SET_3;
+                tvout_write(tvout, val, TVO_HD_SYNC_SEL);
+                tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
+        } else {
+                val = TVO_SYNC_AUX_VTG_SET_2 << TVO_SYNC_HD_DCS_SHIFT;
+                val |= TVO_SYNC_AUX_VTG_SET_3;
+                tvout_write(tvout, val, TVO_HD_SYNC_SEL);
+                tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
         }
 
-        DRM_DEBUG_DRIVER("main vip for HDF\n");
-
         /* set color channel order */
-        tvout_vip_set_color_order(tvout->regs + TVO_VIP_HDF,
+        tvout_vip_set_color_order(tvout, TVO_VIP_HDF,
                                   TVO_VIP_REORDER_CR_R_SEL,
                                   TVO_VIP_REORDER_Y_G_SEL,
                                   TVO_VIP_REORDER_CB_B_SEL);
 
-        /* set clipping mode (Limited range RGB/Y) */
-        tvout_vip_set_clip_mode(tvout->regs + TVO_VIP_HDF,
-                                TVO_VIP_CLIP_LIMITED_RANGE_CB_CR);
+        /* set clipping mode (EAV/SAV clipping) */
+        tvout_vip_set_clip_mode(tvout, TVO_VIP_HDF, TVO_VIP_CLIP_EAV_SAV);
 
         /* set round mode (rounded to 10-bit per component) */
-        tvout_vip_set_rnd(tvout->regs + TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
+        tvout_vip_set_rnd(tvout, TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
 
         if (of_device_is_compatible(node, "st,stih407-tvout")) {
                 /* set input video format */
-                tvout_vip_set_in_vid_fmt(tvout, TVO_IN_FMT_SIGNED);
+                tvout_vip_set_in_vid_fmt(tvout,
+                        tvo_in_vid_format, TVO_IN_FMT_SIGNED);
                 sel_input_logic_inverted = true;
         }
 
         /* Input selection */
-        tvout_vip_set_sel_input(tvout->regs + TVO_VIP_HDF,
-                                main_path,
+        tvout_vip_set_sel_input(tvout, TVO_VIP_HDF, main_path,
                                 sel_input_logic_inverted,
                                 STI_TVOUT_VIDEO_OUT_YUV);
 
-        /* select the input sync for HD analog = VTG set 3
-         * and HD DCS = VTG set 2 */
-        tvout_write(tvout,
-                (TVO_SYNC_MAIN_VTG_SET_2 << TVO_SYNC_HD_DCS_SHIFT)
-                | TVO_SYNC_MAIN_VTG_SET_3,
-                TVO_HD_SYNC_SEL);
-
         /* power up HD DAC */
         tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
 }