From 0e81798e21ae2fb9744c8727383977ddbf8a3cf9 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Mon, 8 Aug 2016 13:40:35 +0300
Subject: [PATCH] drm/omap: remove divider constraint from hsdiv
The driver only uses even dividers for hsdiv when pclk >= 100MHz, as odd
dividers can create uneven duty cycle. However, while this holds true
for some dividers like DISPC's LCK and PCK dividers, it is not actually
true for hsdiv.
hsdiv always produces even duty cycle, so the constraint can be removed.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/gpu/drm/omapdrm/dss/dpi.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/dpi.c b/drivers/gpu/drm/omapdrm/dss/dpi.c
index e75162d26ac04..e0b0c5c24c55f 100644
--- a/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -170,14 +170,6 @@ static bool dpi_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
{
struct dpi_clk_calc_ctx *ctx = data;
- /*
- * Odd dividers give us uneven duty cycle, causing problem when level
- * shifted. So skip all odd dividers when the pixel clock is on the
- * higher side.
- */
- if (m_dispc > 1 && m_dispc % 2 != 0 && ctx->pck_min >= 100000000)
- return false;
-
ctx->pll_cinfo.mX[ctx->clkout_idx] = m_dispc;
ctx->pll_cinfo.clkout[ctx->clkout_idx] = dispc;
--
GitLab