drm/amd/display: refactor clk_resync to avoid assertion

- not all DCE has PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE bit defined.

Signed-off-by: Tony Cheng <tony.cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
index a38172b..78f4327 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
@@ -767,41 +767,44 @@ static void dce112_program_pixel_clk_resync(
                enum dc_color_depth colordepth,
                bool enable_ycbcr420)
 {
-       REG_UPDATE(PIXCLK_RESYNC_CNTL,
-                       PHYPLLA_DCCG_DEEP_COLOR_CNTL, 0);
+       uint32_t deep_color_cntl = 0;
+       uint32_t double_rate_enable = 0;
+
        /*
         24 bit mode: TMDS clock = 1.0 x pixel clock  (1:1)
         30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
         36 bit mode: TMDS clock = 1.5 x pixel clock  (3:2)
         48 bit mode: TMDS clock = 2 x pixel clock    (2:1)
         */
-       if (signal_type != SIGNAL_TYPE_HDMI_TYPE_A)
-               return;
+       if (signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
+               double_rate_enable = enable_ycbcr420 ? 1 : 0;
 
-       switch (colordepth) {
-       case COLOR_DEPTH_888:
-               REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
-                               PHYPLLA_DCCG_DEEP_COLOR_CNTL, 0,
-                               PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, enable_ycbcr420);
-               break;
-       case COLOR_DEPTH_101010:
-               REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
-                               PHYPLLA_DCCG_DEEP_COLOR_CNTL, 1,
-                               PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, enable_ycbcr420);
-               break;
-       case COLOR_DEPTH_121212:
-               REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
-                               PHYPLLA_DCCG_DEEP_COLOR_CNTL, 2,
-                               PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, enable_ycbcr420);
-               break;
-       case COLOR_DEPTH_161616:
-               REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
-                               PHYPLLA_DCCG_DEEP_COLOR_CNTL, 3,
-                               PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, enable_ycbcr420);
-               break;
-       default:
-               break;
+               switch (colordepth) {
+               case COLOR_DEPTH_888:
+                       deep_color_cntl = 0;
+                       break;
+               case COLOR_DEPTH_101010:
+                       deep_color_cntl = 1;
+                       break;
+               case COLOR_DEPTH_121212:
+                       deep_color_cntl = 2;
+                       break;
+               case COLOR_DEPTH_161616:
+                       deep_color_cntl = 3;
+                       break;
+               default:
+                       break;
+               }
        }
+
+       if (clk_src->cs_mask->PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE)
+               REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
+                               PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl,
+                               PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, double_rate_enable);
+       else
+               REG_UPDATE(PIXCLK_RESYNC_CNTL,
+                               PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl);
+
 }
 
 static bool dce110_program_pix_clk(