drm: mali-dp: Mark expected switch fall-through

BugLink: https://bugs.launchpad.net/bugs/1848039
commit 28ba1b1da49a20ba8fb767d6ddd7c521ec79a119 upstream.

Now that -Wimplicit-fallthrough is passed to GCC by default, the
following warnings shows up:

../drivers/gpu/drm/arm/malidp_hw.c: In function ‘malidp_format_get_bpp’:
../drivers/gpu/drm/arm/malidp_hw.c:387:8: warning: this statement may fall
 through [-Wimplicit-fallthrough=]
    bpp = 30;
    ~~~~^~~~
../drivers/gpu/drm/arm/malidp_hw.c:388:3: note: here
   case DRM_FORMAT_YUV420_10BIT:
   ^~~~
../drivers/gpu/drm/arm/malidp_hw.c: In function ‘malidp_se_irq’:
../drivers/gpu/drm/arm/malidp_hw.c:1311:4: warning: this statement may fall
 through [-Wimplicit-fallthrough=]
    drm_writeback_signal_completion(&malidp->mw_connector, 0);
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../drivers/gpu/drm/arm/malidp_hw.c:1313:3: note: here
   case MW_START:
   ^~~~

Rework to add a 'break;' in a case that didn't have it so that
the compiler doesn't warn about fall-through.

Cc: stable@vger.kernel.org # v5.2+
Fixes: b8207562abdd ("drm/arm/malidp: Specified the rotation memory requirements for AFBC YUV formats")
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190730153056.3606-1-anders.roxell@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 50af399d7f6fb37ad945b4b47965398d2d0afba0..380be66d4c6ebb881ce72381f6277e70047e63c8 100644 (file)
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -385,6 +385,7 @@ int malidp_format_get_bpp(u32 fmt)
                switch (fmt) {
                case DRM_FORMAT_VUY101010:
                        bpp = 30;
+                       break;
                case DRM_FORMAT_YUV420_10BIT:
                        bpp = 15;
                        break;
@@ -1309,7 +1310,7 @@ static irqreturn_t malidp_se_irq(int irq, void *arg)
                        break;
                case MW_RESTART:
                        drm_writeback_signal_completion(&malidp->mw_connector, 0);
-                       /* fall through to a new start */
+                       /* fall through - to a new start */
                case MW_START:
                        /* writeback started, need to emulate one-shot mode */
                        hw->disable_memwrite(hwdev);