linux-kernel - [PATCH v1 04/13] drm/kms/mode/fsl-dcu: using helper func drm_display_mode_to_videomode for calculating timing parameters

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Date:   Tue,  8 May 2018 09:45:55 +0530
From:   Satendra Singh Thakur <satendra.t@...sung.com>
To:     Stefan Agner <stefan@...er.ch>,
        Alison Wang <alison.wang@...escale.com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     sst2005@...il.com, Satendra Singh Thakur <satendra.t@...sung.com>,
        Madhur Verma <madhur.verma@...sung.com>,
        Hemanshu Srivastava <hemanshu.s@...sung.com>
Subject: [PATCH v1 04/13] drm/kms/mode/fsl-dcu: using helper func
 drm_display_mode_to_videomode for calculating timing parameters

-Using drm_display_mode_to_videomode to avoid duplicate logic
-Removed index = drm_crtc_index(crtc) as it is unused
-Replaced DRM_MODE_FLAG_* flags with DISPLAY_FLAGS_* flags
-Replaced mode->h/vdisplay with vm.h/vactive

Acked-by: Stefan Agner <stefan@...er.ch>
Signed-off-by: Satendra Singh Thakur <satendra.t@...sung.com>
Cc: Madhur Verma <madhur.verma@...sung.com>
Cc: Hemanshu Srivastava <hemanshu.s@...sung.com>
---

 v1: 
 	Thanks for the comments Mr Stefan. I fixed most of them, other ones can't be fixed as explained below:
     	Header <video/videomode.h> defines struct vm, therefore we can't remove it.
     	Tried to add new line below clk_set_rate but checkpatch gave error.

	Other changes in the patch:
     	Removed index = drm_crtc_index(crtc) line as it is unused
     	Replaced DRM_MODE_FLAG_* flags with DISPLAY_FLAGS_* flags
     	Replaced mode->h/vdisplay with vm.h/vactive
	Added acked-by field

 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 37 ++++++++++++------------------
 1 file changed, 15 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
index 0e37524..d6ea667 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
@@ -17,6 +17,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
+#include <video/videomode.h>
 
 #include "fsl_dcu_drm_crtc.h"
 #include "fsl_dcu_drm_drv.h"
@@ -85,40 +86,32 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
 	struct drm_connector *con = &fsl_dev->connector.base;
 	struct drm_display_mode *mode = &crtc->state->mode;
-	unsigned int hbp, hfp, hsw, vbp, vfp, vsw, index, pol = 0;
-
-	index = drm_crtc_index(crtc);
-	clk_set_rate(fsl_dev->pix_clk, mode->clock * 1000);
-
-	/* Configure timings: */
-	hbp = mode->htotal - mode->hsync_end;
-	hfp = mode->hsync_start - mode->hdisplay;
-	hsw = mode->hsync_end - mode->hsync_start;
-	vbp = mode->vtotal - mode->vsync_end;
-	vfp = mode->vsync_start - mode->vdisplay;
-	vsw = mode->vsync_end - mode->vsync_start;
+	unsigned int pol = 0;
+	struct videomode vm;
 
+	drm_display_mode_to_videomode(mode, &vm);
+	clk_set_rate(fsl_dev->pix_clk, vm.pixelclock);
 	/* INV_PXCK as default (most display sample data on rising edge) */
 	if (!(con->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE))
 		pol |= DCU_SYN_POL_INV_PXCK;
 
-	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+	if (vm.flags & DISPLAY_FLAGS_HSYNC_LOW)
 		pol |= DCU_SYN_POL_INV_HS_LOW;
 
-	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+	if (vm.flags & DISPLAY_FLAGS_VSYNC_LOW)
 		pol |= DCU_SYN_POL_INV_VS_LOW;
 
 	regmap_write(fsl_dev->regmap, DCU_HSYN_PARA,
-		     DCU_HSYN_PARA_BP(hbp) |
-		     DCU_HSYN_PARA_PW(hsw) |
-		     DCU_HSYN_PARA_FP(hfp));
+		     DCU_HSYN_PARA_BP(vm.hback_porch) |
+		     DCU_HSYN_PARA_PW(vm.hsync_len) |
+		     DCU_HSYN_PARA_FP(vm.hfront_porch));
 	regmap_write(fsl_dev->regmap, DCU_VSYN_PARA,
-		     DCU_VSYN_PARA_BP(vbp) |
-		     DCU_VSYN_PARA_PW(vsw) |
-		     DCU_VSYN_PARA_FP(vfp));
+		     DCU_VSYN_PARA_BP(vm.vback_porch) |
+		     DCU_VSYN_PARA_PW(vm.vsync_len) |
+		     DCU_VSYN_PARA_FP(vm.vfront_porch));
 	regmap_write(fsl_dev->regmap, DCU_DISP_SIZE,
-		     DCU_DISP_SIZE_DELTA_Y(mode->vdisplay) |
-		     DCU_DISP_SIZE_DELTA_X(mode->hdisplay));
+		     DCU_DISP_SIZE_DELTA_Y(vm.vactive) |
+		     DCU_DISP_SIZE_DELTA_X(vm.hactive));
 	regmap_write(fsl_dev->regmap, DCU_SYN_POL, pol);
 	regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) |
 		     DCU_BGND_G(0) | DCU_BGND_B(0));
-- 
2.7.4