Hi Kieran,
Thank you for the patch?
On Fri, Mar 15, 2019 at 05:01:08PM +0000, Kieran Bingham wrote:
> Refactoring of the group control code will soon require more iteration
> over the available groups. Simplify this process by introducing a group
> iteration helper.
>
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> ---
> v2:
> - no change
>
> drivers/gpu/drm/rcar-du/rcar_du_drv.h | 5 +++++
> drivers/gpu/drm/rcar-du/rcar_du_kms.c | 10 ++--------
> 2 files changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> index 1327cd0df90a..1e9dd494e8ac 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -96,6 +96,11 @@ struct rcar_du_device {
> unsigned int vspd1_sink;
> };
>
> +#define for_each_rcdu_group(__rcdu, __group, __i) \
> + for ((__i) = 0; (__group = &(rcdu)->groups[__i]), \
> + (__i) < DIV_ROUND_UP((rcdu)->num_crtcs, 2); \
> + __i++)
s/(rcdu)/(__rcdu)/
Assigning __group in the condition part of the for statement seems
weird, even if it should work. How about writing it as
#define for_each_rcdu_group(__rcdu, __group, __i) \
for ((__i) = 0, (__group) = &(__rcdu)->groups[0]; \
(__i) < DIV_ROUND_UP((__rcdu)->num_crtcs, 2); \
__i++, __group++)
Apart from this,
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> static inline bool rcar_du_has(struct rcar_du_device *rcdu,
> unsigned int feature)
> {
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index e4befb1937f8..ece92cff2137 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -522,9 +522,9 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>
> struct drm_device *dev = rcdu->ddev;
> struct drm_encoder *encoder;
> + struct rcar_du_group *rgrp;
> unsigned int dpad0_sources;
> unsigned int num_encoders;
> - unsigned int num_groups;
> unsigned int swindex;
> unsigned int hwindex;
> unsigned int i;
> @@ -565,11 +565,7 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> return ret;
>
> /* Initialize the groups. */
> - num_groups = DIV_ROUND_UP(rcdu->num_crtcs, 2);
> -
> - for (i = 0; i < num_groups; ++i) {
> - struct rcar_du_group *rgrp = &rcdu->groups[i];
> -
> + for_each_rcdu_group(rcdu, rgrp, i) {
> mutex_init(&rgrp->lock);
>
> rgrp->dev = rcdu;
> @@ -606,8 +602,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>
> /* Create the CRTCs. */
> for (swindex = 0, hwindex = 0; swindex < rcdu->num_crtcs; ++hwindex) {
> - struct rcar_du_group *rgrp;
> -
> /* Skip unpopulated DU channels. */
> if (!(rcdu->info->channels_mask & BIT(hwindex)))
> continue;
--
Regards,
Laurent Pinchart
