linux-kernel - [PATCH 08/13] drm/kms/mode/pl111-display: using helper function drm_display_mode_to_videomode for calculating timing parameters

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Date:   Thu,  3 May 2018 15:05:35 +0530
From:   Satendra Singh Thakur <satendra.t@...sung.com>
To:     Eric Anholt <eric@...olt.net>, David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Satendra Singh Thakur <satendra.t@...sung.com>,
        Madhur Verma <madhur.verma@...sung.com>,
        Hemanshu Srivastava <hemanshu.s@...sung.com>
Subject: [PATCH 08/13] drm/kms/mode/pl111-display: using helper function
 drm_display_mode_to_videomode for calculating timing parameters

To avoid duplicate logic for the same

Signed-off-by: Satendra Singh Thakur <satendra.t@...sung.com>
Cc: Madhur Verma <madhur.verma@...sung.com>
Cc: Hemanshu Srivastava <hemanshu.s@...sung.com>
---
 drivers/gpu/drm/pl111/pl111_display.c | 40 +++++++++++++----------------------
 1 file changed, 15 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c
index 3106464..104f318 100644
--- a/drivers/gpu/drm/pl111/pl111_display.c
+++ b/drivers/gpu/drm/pl111/pl111_display.c
@@ -24,6 +24,7 @@
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_fb_cma_helper.h>
+#include <video/videomode.h>
 
 #include "pl111_drm.h"
 
@@ -130,13 +131,14 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
 	struct drm_framebuffer *fb = plane->state->fb;
 	struct drm_connector *connector = priv->connector;
 	struct drm_bridge *bridge = priv->bridge;
+	struct videomode vm;
 	u32 cntl;
-	u32 ppl, hsw, hfp, hbp;
-	u32 lpp, vsw, vfp, vbp;
-	u32 cpl, tim2;
+	u32 tim2;
 	int ret;
 
-	ret = clk_set_rate(priv->clk, mode->clock * 1000);
+	drm_display_mode_to_videomode(mode, &vm);
+
+	ret = clk_set_rate(priv->clk, vm.pixelclock);
 	if (ret) {
 		dev_err(drm->dev,
 			"Failed to set pixel clock rate to %d: %d\n",
@@ -145,27 +147,15 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
 
 	clk_prepare_enable(priv->clk);
 
-	ppl = (mode->hdisplay / 16) - 1;
-	hsw = mode->hsync_end - mode->hsync_start - 1;
-	hfp = mode->hsync_start - mode->hdisplay - 1;
-	hbp = mode->htotal - mode->hsync_end - 1;
-
-	lpp = mode->vdisplay - 1;
-	vsw = mode->vsync_end - mode->vsync_start - 1;
-	vfp = mode->vsync_start - mode->vdisplay;
-	vbp = mode->vtotal - mode->vsync_end;
-
-	cpl = mode->hdisplay - 1;
-
-	writel((ppl << 2) |
-	       (hsw << 8) |
-	       (hfp << 16) |
-	       (hbp << 24),
+	writel((((vm.hactive >> 4) - 1) << 2) |
+	       ((vm.hsync_len - 1) << 8) |
+	       ((vm.hfront_porch - 1) << 16) |
+	       ((vm.hback_porch - 1) << 24),
 	       priv->regs + CLCD_TIM0);
-	writel(lpp |
-	       (vsw << 10) |
-	       (vfp << 16) |
-	       (vbp << 24),
+	writel((vm.vactive - 1) |
+	       ((vm.vsync_len - 1) << 10) |
+	       ((vm.vfront_porch) << 16) |
+	       ((vm.vback_porch) << 24),
 	       priv->regs + CLCD_TIM1);
 
 	spin_lock(&priv->tim2_lock);
@@ -214,7 +204,7 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
 			tim2 ^= TIM2_IPC;
 	}
 
-	tim2 |= cpl << 16;
+	tim2 |= (vm.hactive - 1) << 16;
 	writel(tim2, priv->regs + CLCD_TIM2);
 	spin_unlock(&priv->tim2_lock);
 
-- 
2.7.4