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From:   Douglas Anderson <dianders@chromium.org>
To:     Andrzej Hajda <a.hajda@samsung.com>,
        Neil Armstrong <narmstrong@baylibre.com>
Cc:     robdclark@chromium.org, linux-arm-msm@vger.kernel.org,
        seanpaul@chromium.org, bjorn.andersson@linaro.org,
        Douglas Anderson <dianders@chromium.org>,
        Jonas Karlman <jonas@kwiboo.se>, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Daniel Vetter <daniel@ffwll.ch>
Subject: [PATCH 1/9] drm/bridge: ti-sn65dsi86: Split the setting of the dp and dsi rates
Date:   Fri, 13 Dec 2019 15:45:22 -0800
Message-Id: <20191213154448.1.Icb765d5799e9651e5249c0c27627ba33a9e411cf@changeid>
In-Reply-To: <20191213234530.145963-1-dianders@chromium.org>
References: <20191213234530.145963-1-dianders@chromium.org>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

These two things were in one function.  Split into two.  This looks
like it's duplicating some code, but don't worry.  This is is just in
preparation for future changes.

This is intended to have zero functional change and will just make
future patches easier to understand.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 33 +++++++++++++++++++--------
 1 file changed, 23 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 43abf01ebd4c..2fb9370a76e6 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -417,6 +417,24 @@ static void ti_sn_bridge_set_refclk_freq(struct ti_sn_bridge *pdata)
 			   REFCLK_FREQ(i));
 }
 
+static void ti_sn_bridge_set_dsi_rate(struct ti_sn_bridge *pdata)
+{
+	unsigned int bit_rate_mhz, clk_freq_mhz;
+	unsigned int val;
+	struct drm_display_mode *mode =
+		&pdata->bridge.encoder->crtc->state->adjusted_mode;
+
+	/* set DSIA clk frequency */
+	bit_rate_mhz = (mode->clock / 1000) *
+			mipi_dsi_pixel_format_to_bpp(pdata->dsi->format);
+	clk_freq_mhz = bit_rate_mhz / (pdata->dsi->lanes * 2);
+
+	/* for each increment in val, frequency increases by 5MHz */
+	val = (MIN_DSI_CLK_FREQ_MHZ / 5) +
+		(((clk_freq_mhz - MIN_DSI_CLK_FREQ_MHZ) / 5) & 0xFF);
+	regmap_write(pdata->regmap, SN_DSIA_CLK_FREQ_REG, val);
+}
+
 /**
  * LUT index corresponds to register value and
  * LUT values corresponds to dp data rate supported
@@ -426,22 +444,16 @@ static const unsigned int ti_sn_bridge_dp_rate_lut[] = {
 	0, 1620, 2160, 2430, 2700, 3240, 4320, 5400
 };
 
-static void ti_sn_bridge_set_dsi_dp_rate(struct ti_sn_bridge *pdata)
+static void ti_sn_bridge_set_dp_rate(struct ti_sn_bridge *pdata)
 {
-	unsigned int bit_rate_mhz, clk_freq_mhz, dp_rate_mhz;
-	unsigned int val, i;
+	unsigned int bit_rate_mhz, dp_rate_mhz;
+	unsigned int i;
 	struct drm_display_mode *mode =
 		&pdata->bridge.encoder->crtc->state->adjusted_mode;
 
 	/* set DSIA clk frequency */
 	bit_rate_mhz = (mode->clock / 1000) *
 			mipi_dsi_pixel_format_to_bpp(pdata->dsi->format);
-	clk_freq_mhz = bit_rate_mhz / (pdata->dsi->lanes * 2);
-
-	/* for each increment in val, frequency increases by 5MHz */
-	val = (MIN_DSI_CLK_FREQ_MHZ / 5) +
-		(((clk_freq_mhz - MIN_DSI_CLK_FREQ_MHZ) / 5) & 0xFF);
-	regmap_write(pdata->regmap, SN_DSIA_CLK_FREQ_REG, val);
 
 	/* set DP data rate */
 	dp_rate_mhz = ((bit_rate_mhz / pdata->dsi->lanes) * DP_CLK_FUDGE_NUM) /
@@ -510,7 +522,8 @@ static void ti_sn_bridge_enable(struct drm_bridge *bridge)
 			   val);
 
 	/* set dsi/dp clk frequency value */
-	ti_sn_bridge_set_dsi_dp_rate(pdata);
+	ti_sn_bridge_set_dsi_rate(pdata);
+	ti_sn_bridge_set_dp_rate(pdata);
 
 	/* enable DP PLL */
 	regmap_write(pdata->regmap, SN_PLL_ENABLE_REG, 1);
-- 
2.24.1.735.g03f4e72817-goog