Re: [Intel-gfx] [PATCH 04/10] drm/rockchip/crc: Implement verify_crc_source callback

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Hi,


On 6/27/2018 5:30 PM, Jani Nikula wrote:
On Tue, 26 Jun 2018, Mahesh Kumar <mahesh1.kumar@xxxxxxxxx> wrote:
This patch implements "verify_crc_source" callback function for
rockchip drm driver.

Signed-off-by: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
  drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 21 +++++++++++++++++++++
  1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index c9222119767d..ea4884ac4cb0 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1138,12 +1138,32 @@ static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
return ret;
  }
+
+static int
+vop_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
+			   size_t *values_cnt)
+{
+	if ((source_name && strcmp(source_name, "auto") == 0) || !source_name) {
Drive-by review:

IOW,

	if (!source_name || strcmp(source_name, "auto") == 0)

Better yet, reverse the logic,

	if (source_name && strcmp(source_name, "auto") != 0)
         	return -EINVAL;

	*values_cnt = 3;

	return 0;
thanks for review,
Will reverse the logic as suggested.

-Mahesh
BR,
Jani.

+		*values_cnt = 3;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
  #else
  static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
  				   const char *source_name, size_t *values_cnt)
  {
  	return -ENODEV;
  }
+
+static int
+vop_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
+			   size_t *values_cnt)
+{
+	return -ENODEV;
+}
  #endif
static const struct drm_crtc_funcs vop_crtc_funcs = {
@@ -1156,6 +1176,7 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
  	.enable_vblank = vop_crtc_enable_vblank,
  	.disable_vblank = vop_crtc_disable_vblank,
  	.set_crc_source = vop_crtc_set_crc_source,
+	.verify_crc_source = vop_crtc_verify_crc_source,
  };
static void vop_fb_unref_worker(struct drm_flip_work *work, void *val)

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