drm/omap: cleanup dispc_mgr_lclk_rate()

With the new PLL helpers, we can clean up the dispc_mgr_lclk_rate().
This will also make dispc_mgr_lclk_rate() support clock sources it
didn't support earlier.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 333a347..01994d0 100644 (file)
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -3330,43 +3330,31 @@ static unsigned long dispc_fclk_rate(void)
 
 static unsigned long dispc_mgr_lclk_rate(enum omap_channel channel)
 {
-       struct dss_pll *pll;
        int lcd;
        unsigned long r;
-       u32 l;
-
-       if (dss_mgr_is_lcd(channel)) {
-               l = dispc_read_reg(DISPC_DIVISORo(channel));
+       enum dss_clk_source src;
 
-               lcd = FLD_GET(l, 23, 16);
+       /* for TV, LCLK rate is the FCLK rate */
+       if (!dss_mgr_is_lcd(channel))
+               return dispc_fclk_rate();
 
-               switch (dss_get_lcd_clk_source(channel)) {
-               case DSS_CLK_SRC_FCK:
-                       r = dss_get_dispc_clk_rate();
-                       break;
-               case DSS_CLK_SRC_PLL1_1:
-                       pll = dss_pll_find("dsi0");
-                       if (!pll)
-                               pll = dss_pll_find("video0");
+       src = dss_get_lcd_clk_source(channel);
 
-                       r = pll->cinfo.clkout[0];
-                       break;
-               case DSS_CLK_SRC_PLL2_1:
-                       pll = dss_pll_find("dsi1");
-                       if (!pll)
-                               pll = dss_pll_find("video1");
+       if (src == DSS_CLK_SRC_FCK) {
+               r = dss_get_dispc_clk_rate();
+       } else {
+               struct dss_pll *pll;
+               unsigned clkout_idx;
 
-                       r = pll->cinfo.clkout[0];
-                       break;
-               default:
-                       BUG();
-                       return 0;
-               }
+               pll = dss_pll_find_by_src(src);
+               clkout_idx = dss_pll_get_clkout_idx_for_src(src);
 
-               return r / lcd;
-       } else {
-               return dispc_fclk_rate();
+               r = pll->cinfo.clkout[clkout_idx];
        }
+
+       lcd = REG_GET(DISPC_DIVISORo(channel), 23, 16);
+
+       return r / lcd;
 }
 
 static unsigned long dispc_mgr_pclk_rate(enum omap_channel channel)