| Message ID | 1407235677-26324-13-git-send-email-m.szyprowski@samsung.com |
|---|---|
| State | New |
| Headers | show |
Hi Marek, On 2014년 08월 05일 19:47, Marek Szyprowski wrote: > To correctly disable hardware window during driver init, both enable bits > (WINCONx_ENWIN in WINCON and SHADOWCON_CHx_ENABLE in SHADOWCON) must be > cleared, otherwise hardware fails to re-enable such window later. > > While touching this function, also temporarily disable ctx->suspended flag > to let fimd_wait_for_vblank function really to do its job. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > drivers/gpu/drm/exynos/exynos_drm_fimd.c | 25 ++++++++++++++++++------- > 1 file changed, 18 insertions(+), 7 deletions(-) > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > index 41904df..7a363d2 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > @@ -165,27 +165,38 @@ static void fimd_wait_for_vblank(struct exynos_drm_manager *mgr) > DRM_DEBUG_KMS("vblank wait timed out.\n"); > } > > - > static void fimd_clear_channel(struct exynos_drm_manager *mgr) > { > struct fimd_context *ctx = mgr->ctx; > - int win, ch_enabled = 0; > + int state, win, ch_enabled = 0; It doesn't need to declare state variable here because this variable is used only when ch_enabled is 1. > > DRM_DEBUG_KMS("%s\n", __FILE__); > > /* Check if any channel is enabled. */ > for (win = 0; win < WINDOWS_NR; win++) { > - u32 val = readl(ctx->regs + SHADOWCON); > - if (val & SHADOWCON_CHx_ENABLE(win)) { > - val &= ~SHADOWCON_CHx_ENABLE(win); > - writel(val, ctx->regs + SHADOWCON); > + u32 val = readl(ctx->regs + WINCON(win)); WARNING: Missing a blank line after declarations > + if (val & WINCONx_ENWIN) { > + /* wincon */ > + val &= ~WINCONx_ENWIN; > + writel(val, ctx->regs + WINCON(win)); > + > + /* unprotect windows */ > + if (ctx->driver_data->has_shadowcon) { > + val = readl(ctx->regs + SHADOWCON); > + val &= ~SHADOWCON_CHx_ENABLE(win); > + writel(val, ctx->regs + SHADOWCON); > + } > ch_enabled = 1; > } > } > > /* Wait for vsync, as disable channel takes effect at next vsync */ > - if (ch_enabled) > + if (ch_enabled) { > + state = ctx->suspended; int state = ctx->suspended; > + ctx->suspended = 0; > fimd_wait_for_vblank(mgr); > + ctx->suspended = state; > + } > } > > static int fimd_mgr_initialize(struct exynos_drm_manager *mgr, > Above is trivial so I fixed them. Picked it up. Thanks, Inki Dae -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 41904df..7a363d2 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -165,27 +165,38 @@ static void fimd_wait_for_vblank(struct exynos_drm_manager *mgr) DRM_DEBUG_KMS("vblank wait timed out.\n"); } - static void fimd_clear_channel(struct exynos_drm_manager *mgr) { struct fimd_context *ctx = mgr->ctx; - int win, ch_enabled = 0; + int state, win, ch_enabled = 0; DRM_DEBUG_KMS("%s\n", __FILE__); /* Check if any channel is enabled. */ for (win = 0; win < WINDOWS_NR; win++) { - u32 val = readl(ctx->regs + SHADOWCON); - if (val & SHADOWCON_CHx_ENABLE(win)) { - val &= ~SHADOWCON_CHx_ENABLE(win); - writel(val, ctx->regs + SHADOWCON); + u32 val = readl(ctx->regs + WINCON(win)); + if (val & WINCONx_ENWIN) { + /* wincon */ + val &= ~WINCONx_ENWIN; + writel(val, ctx->regs + WINCON(win)); + + /* unprotect windows */ + if (ctx->driver_data->has_shadowcon) { + val = readl(ctx->regs + SHADOWCON); + val &= ~SHADOWCON_CHx_ENABLE(win); + writel(val, ctx->regs + SHADOWCON); + } ch_enabled = 1; } } /* Wait for vsync, as disable channel takes effect at next vsync */ - if (ch_enabled) + if (ch_enabled) { + state = ctx->suspended; + ctx->suspended = 0; fimd_wait_for_vblank(mgr); + ctx->suspended = state; + } } static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
To correctly disable hardware window during driver init, both enable bits (WINCONx_ENWIN in WINCON and SHADOWCON_CHx_ENABLE in SHADOWCON) must be cleared, otherwise hardware fails to re-enable such window later. While touching this function, also temporarily disable ctx->suspended flag to let fimd_wait_for_vblank function really to do its job. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/gpu/drm/exynos/exynos_drm_fimd.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-)