On Sun, Mar 03, 2019 at 11:05:27PM +0530, Jagan Teki wrote: > DSI timings are varies between burst/non-burst devices and > current driver is handling this support via if, else statements > which would difficult to read. > > Simplify it by using goto to make code more readable. > > Signed-off-by: Jagan Teki <ja...@amarulasolutions.com> > Tested-by: Merlijn Wajer <merl...@wizzup.org> > --- > Note: This change is created based on previous version burst > changes [1] by addressing comment from [2] by Maxime to make > code readable. > > [1] https://patchwork.kernel.org/cover/10813623/ > [2] https://patchwork.kernel.org/patch/10666607/ > > drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 79 ++++++++++++++------------ > 1 file changed, 42 insertions(+), 37 deletions(-) > > diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > index 31ec4048804d..898f32319c2d 100644 > --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > @@ -550,7 +550,8 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, > { > struct mipi_dsi_device *device = dsi->device; > unsigned int Bpp = mipi_dsi_pixel_format_to_bpp(device->format) / 8; > - u16 hbp = 0, hfp = 0, hsa = 0, hblk = 0, vblk = 0; > + u16 hbp, hfp, hsa, hblk; > + u16 vblk = 0; > u32 basic_ctl = 0; > size_t bytes; > u8 *buffer; > @@ -558,6 +559,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, > /* Do all timing calculations up front to allocate buffer space */ > > if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { > + hbp = hfp = hsa = 0;
This raises a checkpatch warning and isn't necessary
> hblk = mode->hdisplay * Bpp;
> basic_ctl = SUN6I_DSI_BASIC_CTL_VIDEO_BURST |
> SUN6I_DSI_BASIC_CTL_HSA_HSE_DIS |
> @@ -566,48 +568,51 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi
> *dsi,
> if (device->lanes == 4)
> basic_ctl |= SUN6I_DSI_BASIC_CTL_TRAIL_FILL |
> SUN6I_DSI_BASIC_CTL_TRAIL_INV(0xc);
> - } else {
> - /*
> - * A sync period is composed of a blanking packet (4
> - * bytes + payload + 2 bytes) and a sync event packet
> - * (4 bytes). Its minimal size is therefore 10 bytes
> - */
> +
> + goto alloc_buf;
And I'd rather not have a goto in the middle of the code for no
particular reason.
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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